qemu/hw/intc/xics.c

1094 lines
28 KiB
C
Raw Normal View History

Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
/*
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
*
* PAPR Virtualized Interrupt System, aka ICS/ICP aka xics
*
* Copyright (c) 2010,2011 David Gibson, IBM Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "qemu/osdep.h"
2016-03-14 11:01:28 +03:00
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "trace.h"
#include "qemu/timer.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/xics.h"
#include "qemu/error-report.h"
#include "qapi/visitor.h"
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
static int get_cpu_index_by_dt_id(int cpu_dt_id)
{
PowerPCCPU *cpu = ppc_get_vcpu_by_dt_id(cpu_dt_id);
if (cpu) {
return cpu->parent_obj.cpu_index;
}
return -1;
}
void xics_cpu_setup(XICSState *icp, PowerPCCPU *cpu)
{
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
ICPState *ss = &icp->ss[cs->cpu_index];
XICSStateClass *info = XICS_COMMON_GET_CLASS(icp);
assert(cs->cpu_index < icp->nr_servers);
if (info->cpu_setup) {
info->cpu_setup(icp, cpu);
}
switch (PPC_INPUT(env)) {
case PPC_FLAGS_INPUT_POWER7:
ss->output = env->irq_inputs[POWER7_INPUT_INT];
break;
case PPC_FLAGS_INPUT_970:
ss->output = env->irq_inputs[PPC970_INPUT_INT];
break;
default:
error_report("XICS interrupt controller does not support this CPU "
"bus model");
abort();
}
}
/*
* XICS Common class - parent for emulated XICS and KVM-XICS
*/
static void xics_common_reset(DeviceState *d)
{
XICSState *icp = XICS_COMMON(d);
int i;
for (i = 0; i < icp->nr_servers; i++) {
device_reset(DEVICE(&icp->ss[i]));
}
device_reset(DEVICE(icp->ics));
}
static void xics_prop_get_nr_irqs(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
XICSState *icp = XICS_COMMON(obj);
int64_t value = icp->nr_irqs;
qapi: Swap visit_* arguments for consistent 'name' placement JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
visit_type_int(v, name, &value, errp);
}
static void xics_prop_set_nr_irqs(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
XICSState *icp = XICS_COMMON(obj);
XICSStateClass *info = XICS_COMMON_GET_CLASS(icp);
Error *error = NULL;
int64_t value;
qapi: Swap visit_* arguments for consistent 'name' placement JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
visit_type_int(v, name, &value, &error);
if (error) {
error_propagate(errp, error);
return;
}
if (icp->nr_irqs) {
error_setg(errp, "Number of interrupts is already set to %u",
icp->nr_irqs);
return;
}
assert(info->set_nr_irqs);
assert(icp->ics);
info->set_nr_irqs(icp, value, errp);
}
static void xics_prop_get_nr_servers(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
XICSState *icp = XICS_COMMON(obj);
int64_t value = icp->nr_servers;
qapi: Swap visit_* arguments for consistent 'name' placement JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
visit_type_int(v, name, &value, errp);
}
static void xics_prop_set_nr_servers(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
XICSState *icp = XICS_COMMON(obj);
XICSStateClass *info = XICS_COMMON_GET_CLASS(icp);
Error *error = NULL;
int64_t value;
qapi: Swap visit_* arguments for consistent 'name' placement JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 16:48:54 +03:00
visit_type_int(v, name, &value, &error);
if (error) {
error_propagate(errp, error);
return;
}
if (icp->nr_servers) {
error_setg(errp, "Number of servers is already set to %u",
icp->nr_servers);
return;
}
assert(info->set_nr_servers);
info->set_nr_servers(icp, value, errp);
}
static void xics_common_initfn(Object *obj)
{
object_property_add(obj, "nr_irqs", "int",
xics_prop_get_nr_irqs, xics_prop_set_nr_irqs,
NULL, NULL, NULL);
object_property_add(obj, "nr_servers", "int",
xics_prop_get_nr_servers, xics_prop_set_nr_servers,
NULL, NULL, NULL);
}
static void xics_common_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->reset = xics_common_reset;
}
static const TypeInfo xics_common_info = {
.name = TYPE_XICS_COMMON,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(XICSState),
.class_size = sizeof(XICSStateClass),
.instance_init = xics_common_initfn,
.class_init = xics_common_class_init,
};
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
/*
* ICP: Presentation layer
*/
#define XISR_MASK 0x00ffffff
#define CPPR_MASK 0xff000000
#define XISR(ss) (((ss)->xirr) & XISR_MASK)
#define CPPR(ss) (((ss)->xirr) >> 24)
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_reject(ICSState *ics, int nr);
static void ics_resend(ICSState *ics);
static void ics_eoi(ICSState *ics, int nr);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_check_ipi(XICSState *icp, int server)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (XISR(ss) && (ss->pending_priority <= ss->mfrr)) {
return;
}
trace_xics_icp_check_ipi(server, ss->mfrr);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (XISR(ss)) {
ics_reject(icp->ics, XISR(ss));
}
ss->xirr = (ss->xirr & ~XISR_MASK) | XICS_IPI;
ss->pending_priority = ss->mfrr;
qemu_irq_raise(ss->output);
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_resend(XICSState *icp, int server)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (ss->mfrr < CPPR(ss)) {
icp_check_ipi(icp, server);
}
ics_resend(icp->ics);
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_set_cppr(XICSState *icp, int server, uint8_t cppr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint8_t old_cppr;
uint32_t old_xisr;
old_cppr = CPPR(ss);
ss->xirr = (ss->xirr & ~CPPR_MASK) | (cppr << 24);
if (cppr < old_cppr) {
if (XISR(ss) && (cppr <= ss->pending_priority)) {
old_xisr = XISR(ss);
ss->xirr &= ~XISR_MASK; /* Clear XISR */
ss->pending_priority = 0xff;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
qemu_irq_lower(ss->output);
ics_reject(icp->ics, old_xisr);
}
} else {
if (!XISR(ss)) {
icp_resend(icp, server);
}
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_set_mfrr(XICSState *icp, int server, uint8_t mfrr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
ss->mfrr = mfrr;
if (mfrr < CPPR(ss)) {
icp_check_ipi(icp, server);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static uint32_t icp_accept(ICPState *ss)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
uint32_t xirr = ss->xirr;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
qemu_irq_lower(ss->output);
ss->xirr = ss->pending_priority << 24;
ss->pending_priority = 0xff;
trace_xics_icp_accept(xirr, ss->xirr);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return xirr;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_eoi(XICSState *icp, int server, uint32_t xirr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
/* Send EOI -> ICS */
ss->xirr = (ss->xirr & ~CPPR_MASK) | (xirr & CPPR_MASK);
trace_xics_icp_eoi(server, xirr, ss->xirr);
ics_eoi(icp->ics, xirr & XISR_MASK);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (!XISR(ss)) {
icp_resend(icp, server);
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_irq(XICSState *icp, int server, int nr, uint8_t priority)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICPState *ss = icp->ss + server;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
trace_xics_icp_irq(server, nr, priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if ((priority >= CPPR(ss))
|| (XISR(ss) && (ss->pending_priority <= priority))) {
ics_reject(icp->ics, nr);
} else {
if (XISR(ss)) {
ics_reject(icp->ics, XISR(ss));
}
ss->xirr = (ss->xirr & ~XISR_MASK) | (nr & XISR_MASK);
ss->pending_priority = priority;
trace_xics_icp_raise(ss->xirr, ss->pending_priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
qemu_irq_raise(ss->output);
}
}
static void icp_dispatch_pre_save(void *opaque)
{
ICPState *ss = opaque;
ICPStateClass *info = ICP_GET_CLASS(ss);
if (info->pre_save) {
info->pre_save(ss);
}
}
static int icp_dispatch_post_load(void *opaque, int version_id)
{
ICPState *ss = opaque;
ICPStateClass *info = ICP_GET_CLASS(ss);
if (info->post_load) {
return info->post_load(ss, version_id);
}
return 0;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static const VMStateDescription vmstate_icp_server = {
.name = "icp/server",
.version_id = 1,
.minimum_version_id = 1,
.pre_save = icp_dispatch_pre_save,
.post_load = icp_dispatch_post_load,
.fields = (VMStateField[]) {
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
/* Sanity check */
VMSTATE_UINT32(xirr, ICPState),
VMSTATE_UINT8(pending_priority, ICPState),
VMSTATE_UINT8(mfrr, ICPState),
VMSTATE_END_OF_LIST()
},
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
};
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void icp_reset(DeviceState *dev)
{
ICPState *icp = ICP(dev);
icp->xirr = 0;
icp->pending_priority = 0xff;
icp->mfrr = 0xff;
/* Make all outputs are deasserted */
qemu_set_irq(icp->output, 0);
}
static void icp_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = icp_reset;
dc->vmsd = &vmstate_icp_server;
}
static const TypeInfo icp_info = {
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
.name = TYPE_ICP,
.parent = TYPE_DEVICE,
.instance_size = sizeof(ICPState),
.class_init = icp_class_init,
.class_size = sizeof(ICPStateClass),
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
};
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
/*
* ICS: Source layer
*/
static int ics_valid_irq(ICSState *ics, uint32_t nr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
return (nr >= ics->offset)
&& (nr < (ics->offset + ics->nr_irqs));
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void resend_msi(ICSState *ics, int srcno)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
/* FIXME: filter by server#? */
if (irq->status & XICS_STATUS_REJECTED) {
irq->status &= ~XICS_STATUS_REJECTED;
if (irq->priority != 0xff) {
icp_irq(ics->icp, irq->server, srcno + ics->offset,
irq->priority);
}
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void resend_lsi(ICSState *ics, int srcno)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
if ((irq->priority != 0xff)
&& (irq->status & XICS_STATUS_ASSERTED)
&& !(irq->status & XICS_STATUS_SENT)) {
irq->status |= XICS_STATUS_SENT;
icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void set_irq_msi(ICSState *ics, int srcno, int val)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
trace_xics_set_irq_msi(srcno, srcno + ics->offset);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (val) {
if (irq->priority == 0xff) {
irq->status |= XICS_STATUS_MASKED_PENDING;
trace_xics_masked_pending();
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
} else {
icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void set_irq_lsi(ICSState *ics, int srcno, int val)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
trace_xics_set_irq_lsi(srcno, srcno + ics->offset);
if (val) {
irq->status |= XICS_STATUS_ASSERTED;
} else {
irq->status &= ~XICS_STATUS_ASSERTED;
}
resend_lsi(ics, srcno);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
static void ics_set_irq(void *opaque, int srcno, int val)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSState *ics = (ICSState *)opaque;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
set_irq_lsi(ics, srcno, val);
} else {
set_irq_msi(ics, srcno, val);
}
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void write_xive_msi(ICSState *ics, int srcno)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
if (!(irq->status & XICS_STATUS_MASKED_PENDING)
|| (irq->priority == 0xff)) {
return;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
irq->status &= ~XICS_STATUS_MASKED_PENDING;
icp_irq(ics->icp, irq->server, srcno + ics->offset, irq->priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void write_xive_lsi(ICSState *ics, int srcno)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
resend_lsi(ics, srcno);
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_write_xive(ICSState *ics, int nr, int server,
uint8_t priority, uint8_t saved_priority)
{
int srcno = nr - ics->offset;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
irq->server = server;
irq->priority = priority;
irq->saved_priority = saved_priority;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
trace_xics_ics_write_xive(nr, srcno, server, priority);
if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
write_xive_lsi(ics, srcno);
} else {
write_xive_msi(ics, srcno);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_reject(ICSState *ics, int nr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + nr - ics->offset;
trace_xics_ics_reject(nr, nr - ics->offset);
irq->status |= XICS_STATUS_REJECTED; /* Irrelevant but harmless for LSI */
irq->status &= ~XICS_STATUS_SENT; /* Irrelevant but harmless for MSI */
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_resend(ICSState *ics)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
int i;
for (i = 0; i < ics->nr_irqs; i++) {
/* FIXME: filter by server#? */
if (ics->irqs[i].flags & XICS_FLAGS_IRQ_LSI) {
resend_lsi(ics, i);
} else {
resend_msi(ics, i);
}
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_eoi(ICSState *ics, int nr)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
int srcno = nr - ics->offset;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSIRQState *irq = ics->irqs + srcno;
trace_xics_ics_eoi(nr);
if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_LSI) {
irq->status &= ~XICS_STATUS_SENT;
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void ics_reset(DeviceState *dev)
{
ICSState *ics = ICS(dev);
int i;
uint8_t flags[ics->nr_irqs];
for (i = 0; i < ics->nr_irqs; i++) {
flags[i] = ics->irqs[i].flags;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
memset(ics->irqs, 0, sizeof(ICSIRQState) * ics->nr_irqs);
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
for (i = 0; i < ics->nr_irqs; i++) {
ics->irqs[i].priority = 0xff;
ics->irqs[i].saved_priority = 0xff;
ics->irqs[i].flags = flags[i];
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
}
}
static int ics_post_load(ICSState *ics, int version_id)
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
{
int i;
for (i = 0; i < ics->icp->nr_servers; i++) {
icp_resend(ics->icp, i);
}
return 0;
}
static void ics_dispatch_pre_save(void *opaque)
{
ICSState *ics = opaque;
ICSStateClass *info = ICS_GET_CLASS(ics);
if (info->pre_save) {
info->pre_save(ics);
}
}
static int ics_dispatch_post_load(void *opaque, int version_id)
{
ICSState *ics = opaque;
ICSStateClass *info = ICS_GET_CLASS(ics);
if (info->post_load) {
return info->post_load(ics, version_id);
}
return 0;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static const VMStateDescription vmstate_ics_irq = {
.name = "ics/irq",
.version_id = 2,
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
.minimum_version_id = 1,
.fields = (VMStateField[]) {
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
VMSTATE_UINT32(server, ICSIRQState),
VMSTATE_UINT8(priority, ICSIRQState),
VMSTATE_UINT8(saved_priority, ICSIRQState),
VMSTATE_UINT8(status, ICSIRQState),
VMSTATE_UINT8(flags, ICSIRQState),
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
VMSTATE_END_OF_LIST()
},
};
static const VMStateDescription vmstate_ics = {
.name = "ics",
.version_id = 1,
.minimum_version_id = 1,
.pre_save = ics_dispatch_pre_save,
.post_load = ics_dispatch_post_load,
.fields = (VMStateField[]) {
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
/* Sanity check */
VMSTATE_UINT32_EQUAL(nr_irqs, ICSState),
VMSTATE_STRUCT_VARRAY_POINTER_UINT32(irqs, ICSState, nr_irqs,
vmstate_ics_irq, ICSIRQState),
VMSTATE_END_OF_LIST()
},
};
static void ics_initfn(Object *obj)
{
ICSState *ics = ICS(obj);
ics->offset = XICS_IRQ_BASE;
}
static void ics_realize(DeviceState *dev, Error **errp)
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
{
ICSState *ics = ICS(dev);
if (!ics->nr_irqs) {
error_setg(errp, "Number of interrupts needs to be greater 0");
return;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ics->irqs = g_malloc0(ics->nr_irqs * sizeof(ICSIRQState));
ics->qirqs = qemu_allocate_irqs(ics_set_irq, ics, ics->nr_irqs);
}
static void ics_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ICSStateClass *isc = ICS_CLASS(klass);
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
dc->realize = ics_realize;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
dc->vmsd = &vmstate_ics;
dc->reset = ics_reset;
isc->post_load = ics_post_load;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
}
static const TypeInfo ics_info = {
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
.name = TYPE_ICS,
.parent = TYPE_DEVICE,
.instance_size = sizeof(ICSState),
.class_init = ics_class_init,
.class_size = sizeof(ICSStateClass),
.instance_init = ics_initfn,
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
};
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
/*
* Exported functions
*/
static int xics_find_source(XICSState *icp, int irq)
{
int sources = 1;
int src;
/* FIXME: implement multiple sources */
for (src = 0; src < sources; ++src) {
ICSState *ics = &icp->ics[src];
if (ics_valid_irq(ics, irq)) {
return src;
}
}
return -1;
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
qemu_irq xics_get_qirq(XICSState *icp, int irq)
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
{
int src = xics_find_source(icp, irq);
if (src >= 0) {
ICSState *ics = &icp->ics[src];
return ics->qirqs[irq - ics->offset];
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
return NULL;
}
static void ics_set_irq_type(ICSState *ics, int srcno, bool lsi)
{
assert(!(ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MASK));
ics->irqs[srcno].flags |=
lsi ? XICS_FLAGS_IRQ_LSI : XICS_FLAGS_IRQ_MSI;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
void xics_set_irq_type(XICSState *icp, int irq, bool lsi)
{
int src = xics_find_source(icp, irq);
ICSState *ics;
assert(src >= 0);
ics = &icp->ics[src];
ics_set_irq_type(ics, irq - ics->offset, lsi);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
#define ICS_IRQ_FREE(ics, srcno) \
(!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
static int ics_find_free_block(ICSState *ics, int num, int alignnum)
{
int first, i;
for (first = 0; first < ics->nr_irqs; first += alignnum) {
if (num > (ics->nr_irqs - first)) {
return -1;
}
for (i = first; i < first + num; ++i) {
if (!ICS_IRQ_FREE(ics, i)) {
break;
}
}
if (i == (first + num)) {
return first;
}
}
return -1;
}
int xics_alloc(XICSState *icp, int src, int irq_hint, bool lsi, Error **errp)
{
ICSState *ics = &icp->ics[src];
int irq;
if (irq_hint) {
assert(src == xics_find_source(icp, irq_hint));
if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) {
error_setg(errp, "can't allocate IRQ %d: already in use", irq_hint);
return -1;
}
irq = irq_hint;
} else {
irq = ics_find_free_block(ics, 1, 1);
if (irq < 0) {
error_setg(errp, "can't allocate IRQ: no IRQ left");
return -1;
}
irq += ics->offset;
}
ics_set_irq_type(ics, irq - ics->offset, lsi);
trace_xics_alloc(src, irq);
return irq;
}
/*
* Allocate block of consecutive IRQs, and return the number of the first IRQ in the block.
* If align==true, aligns the first IRQ number to num.
*/
int xics_alloc_block(XICSState *icp, int src, int num, bool lsi, bool align,
Error **errp)
{
int i, first = -1;
ICSState *ics = &icp->ics[src];
assert(src == 0);
/*
* MSIMesage::data is used for storing VIRQ so
* it has to be aligned to num to support multiple
* MSI vectors. MSI-X is not affected by this.
* The hint is used for the first IRQ, the rest should
* be allocated continuously.
*/
if (align) {
assert((num == 1) || (num == 2) || (num == 4) ||
(num == 8) || (num == 16) || (num == 32));
first = ics_find_free_block(ics, num, num);
} else {
first = ics_find_free_block(ics, num, 1);
}
if (first < 0) {
error_setg(errp, "can't find a free %d-IRQ block", num);
return -1;
}
if (first >= 0) {
for (i = first; i < first + num; ++i) {
ics_set_irq_type(ics, i, lsi);
}
}
first += ics->offset;
trace_xics_alloc_block(src, first, num, lsi, align);
return first;
}
static void ics_free(ICSState *ics, int srcno, int num)
{
int i;
for (i = srcno; i < srcno + num; ++i) {
if (ICS_IRQ_FREE(ics, i)) {
trace_xics_ics_free_warn(ics - ics->icp->ics, i + ics->offset);
}
memset(&ics->irqs[i], 0, sizeof(ICSIRQState));
}
}
void xics_free(XICSState *icp, int irq, int num)
{
int src = xics_find_source(icp, irq);
if (src >= 0) {
ICSState *ics = &icp->ics[src];
/* FIXME: implement multiple sources */
assert(src == 0);
trace_xics_ics_free(ics - icp->ics, irq, num);
ics_free(ics, irq - ics->offset, num);
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
/*
* Guest interfaces
*/
static target_ulong h_cppr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong cppr = args[0];
icp_set_cppr(spapr->icp, cs->cpu_index, cppr);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return H_SUCCESS;
}
static target_ulong h_ipi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong opcode, target_ulong *args)
{
target_ulong server = get_cpu_index_by_dt_id(args[0]);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong mfrr = args[1];
if (server >= spapr->icp->nr_servers) {
return H_PARAMETER;
}
icp_set_mfrr(spapr->icp, server, mfrr);
return H_SUCCESS;
}
static target_ulong h_xirr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
uint32_t xirr = icp_accept(spapr->icp->ss + cs->cpu_index);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
args[0] = xirr;
return H_SUCCESS;
}
static target_ulong h_xirr_x(PowerPCCPU *cpu, sPAPRMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
ICPState *ss = &spapr->icp->ss[cs->cpu_index];
uint32_t xirr = icp_accept(ss);
args[0] = xirr;
args[1] = cpu_get_host_ticks();
return H_SUCCESS;
}
static target_ulong h_eoi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
target_ulong xirr = args[0];
icp_eoi(spapr->icp, cs->cpu_index, xirr);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return H_SUCCESS;
}
static target_ulong h_ipoll(PowerPCCPU *cpu, sPAPRMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
ICPState *ss = &spapr->icp->ss[cs->cpu_index];
args[0] = ss->xirr;
args[1] = ss->mfrr;
return H_SUCCESS;
}
static void rtas_set_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSState *ics = spapr->icp->ics;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nr, server, priority;
if ((nargs != 3) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
nr = rtas_ld(args, 0);
server = get_cpu_index_by_dt_id(rtas_ld(args, 1));
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
priority = rtas_ld(args, 2);
if (!ics_valid_irq(ics, nr) || (server >= ics->icp->nr_servers)
|| (priority > 0xff)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
ics_write_xive(ics, nr, server, priority, priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
static void rtas_get_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSState *ics = spapr->icp->ics;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nr;
if ((nargs != 1) || (nret != 3)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
rtas_st(rets, 1, ics->irqs[nr - ics->offset].server);
rtas_st(rets, 2, ics->irqs[nr - ics->offset].priority);
}
static void rtas_int_off(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSState *ics = spapr->icp->ics;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nr;
if ((nargs != 1) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server, 0xff,
ics->irqs[nr - ics->offset].priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
static void rtas_int_on(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token,
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
ICSState *ics = spapr->icp->ics;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
uint32_t nr;
if ((nargs != 1) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
return;
}
ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server,
ics->irqs[nr - ics->offset].saved_priority,
ics->irqs[nr - ics->offset].saved_priority);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
/*
* XICS
*/
static void xics_set_nr_irqs(XICSState *icp, uint32_t nr_irqs, Error **errp)
{
icp->nr_irqs = icp->ics->nr_irqs = nr_irqs;
}
static void xics_set_nr_servers(XICSState *icp, uint32_t nr_servers,
Error **errp)
{
int i;
icp->nr_servers = nr_servers;
icp->ss = g_malloc0(icp->nr_servers*sizeof(ICPState));
for (i = 0; i < icp->nr_servers; i++) {
char buffer[32];
object_initialize(&icp->ss[i], sizeof(icp->ss[i]), TYPE_ICP);
snprintf(buffer, sizeof(buffer), "icp[%d]", i);
object_property_add_child(OBJECT(icp), buffer, OBJECT(&icp->ss[i]),
errp);
}
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void xics_realize(DeviceState *dev, Error **errp)
{
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
XICSState *icp = XICS(dev);
Error *error = NULL;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
int i;
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
if (!icp->nr_servers) {
error_setg(errp, "Number of servers needs to be greater 0");
return;
}
/* Registration of global state belongs into realize */
spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_int_on);
spapr_register_hypercall(H_CPPR, h_cppr);
spapr_register_hypercall(H_IPI, h_ipi);
spapr_register_hypercall(H_XIRR, h_xirr);
spapr_register_hypercall(H_XIRR_X, h_xirr_x);
spapr_register_hypercall(H_EOI, h_eoi);
spapr_register_hypercall(H_IPOLL, h_ipoll);
object_property_set_bool(OBJECT(icp->ics), true, "realized", &error);
if (error) {
error_propagate(errp, error);
return;
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
for (i = 0; i < icp->nr_servers; i++) {
object_property_set_bool(OBJECT(&icp->ss[i]), true, "realized", &error);
if (error) {
error_propagate(errp, error);
return;
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
}
}
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void xics_initfn(Object *obj)
{
XICSState *xics = XICS(obj);
xics->ics = ICS(object_new(TYPE_ICS));
object_property_add_child(obj, "ics", OBJECT(xics->ics), NULL);
xics->ics->icp = xics;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
}
static void xics_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
XICSStateClass *xsc = XICS_CLASS(oc);
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
dc->realize = xics_realize;
xsc->set_nr_irqs = xics_set_nr_irqs;
xsc->set_nr_servers = xics_set_nr_servers;
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
}
static const TypeInfo xics_info = {
.name = TYPE_XICS,
.parent = TYPE_XICS_COMMON,
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
.instance_size = sizeof(XICSState),
.class_size = sizeof(XICSStateClass),
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
.class_init = xics_class_init,
.instance_init = xics_initfn,
};
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
static void xics_register_types(void)
{
type_register_static(&xics_common_info);
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
type_register_static(&xics_info);
type_register_static(&ics_info);
type_register_static(&icp_info);
Implement the PAPR (pSeries) virtualized interrupt controller (xics) PAPR defines an interrupt control architecture which is logically divided into ICS (Interrupt Control Presentation, each unit is responsible for presenting interrupts to a particular "interrupt server", i.e. CPU) and ICS (Interrupt Control Source, each unit responsible for one or more hardware interrupts as numbered globally across the system). All PAPR virtual IO devices expect to deliver interrupts via this mechanism. In Linux, this interrupt controller system is handled by the "xics" driver. On pSeries systems, access to the interrupt controller is virtualized via hypercalls and RTAS methods. However, the virtualized interface is very similar to the underlying interrupt controller hardware, and similar PICs exist un-virtualized in some other systems. This patch implements both the ICP and ICS sides of the PAPR interrupt controller. For now, only the hypercall virtualized interface is provided, however it would be relatively straightforward to graft an emulated register interface onto the underlying interrupt logic if we want to add a machine with a hardware ICS/ICP system in the future. There are some limitations in this implementation: it is assumed for now that only one instance of the ICS exists, although a full xics system can have several, each responsible for a different group of hardware irqs. ICP/ICS can handle both level-sensitve (LSI) and message signalled (MSI) interrupt inputs. For now, this implementation supports only MSI interrupts, since that is used by PAPR virtual IO devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01 08:15:25 +04:00
}
xics: rename types to be sane and follow coding style Basically, in HW the layout of the interrupt network is: - One ICP per processor thread (the "presenter"). This contains the registers to fetch a pending interrupt (ack), EOI, and control the processor priority. - One ICS per logical source of interrupts (ie, one per PCI host bridge, and a few others here or there). This contains the per-interrupt source configuration (target processor(s), priority, mask) and the per-interrupt internal state. Under PAPR, there is a single "virtual" ICS ... somewhat (it's a bit oddball what pHyp does here, arguably there are two but we can ignore that distinction). There is no register level access. A pair of firmware (RTAS) calls is used to configure each virtual interrupt. So our model here is somewhat the same. We have one ICS in the emulated XICS which arguably *is* the emulated XICS, there's no point making it a separate "device", that would just be gross, and each VCPU has an associated ICP. Yet we call the "XICS" struct icp_state and then the ICPs 'struct icp_server_state'. It's particularly confusing when all of the functions have xics_prefixes yet take *icp arguments. Rename: struct icp_state -> XICSState struct icp_server_state -> ICPState struct ics_state -> ICSState struct ics_irq_state -> ICSIRQState Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Message-id: 1374175984-8930-12-git-send-email-aliguori@us.ibm.com [aik: added ics_resend() on post_load] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-07-18 23:33:04 +04:00
type_init(xics_register_types)