mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
eab9f191a0
qemu/hw/intc/xics_spapr.c
Greg Kurz 25c79a3089 xics/spapr: Only emulated XICS should use RTAS/hypercalls emulation 
Checking that we're not using the in-kernel XICS is ok with the "xics"
interrupt controller mode, but it is definitely not enough with the
other modes since the guest could be using XIVE.

Ensure XIVE is not in use when emulated XICS RTAS/hypercalls are
called.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <156077253666.424706.6104557911104491047.stgit@bahia.lan>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2019-07-02 09:43:58 +10:00

323 lines
9.4 KiB
C
Raw Blame History

/*
* 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"
#include "cpu.h"
#include "hw/hw.h"
#include "trace.h"
#include "qemu/timer.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_cpu_core.h"
#include "hw/ppc/xics.h"
#include "hw/ppc/xics_spapr.h"
#include "hw/ppc/fdt.h"
#include "qapi/visitor.h"
/*
* Guest interfaces
*/
static bool check_emulated_xics(SpaprMachineState *spapr, const char *func)
{
if (spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT) ||
kvm_irqchip_in_kernel()) {
error_report("pseries: %s must only be called for emulated XICS",
func);
return false;
}
return true;
}
#define CHECK_EMULATED_XICS_HCALL(spapr) \
do { \
if (!check_emulated_xics((spapr), __func__)) { \
return H_HARDWARE; \
} \
} while (0)
static target_ulong h_cppr(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
target_ulong cppr = args[0];
CHECK_EMULATED_XICS_HCALL(spapr);
icp_set_cppr(spapr_cpu_state(cpu)->icp, cppr);
return H_SUCCESS;
}
static target_ulong h_ipi(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
target_ulong mfrr = args[1];
ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), args[0]);
CHECK_EMULATED_XICS_HCALL(spapr);
if (!icp) {
return H_PARAMETER;
}
icp_set_mfrr(icp, mfrr);
return H_SUCCESS;
}
static target_ulong h_xirr(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
uint32_t xirr = icp_accept(spapr_cpu_state(cpu)->icp);
CHECK_EMULATED_XICS_HCALL(spapr);
args[0] = xirr;
return H_SUCCESS;
}
static target_ulong h_xirr_x(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
uint32_t xirr = icp_accept(spapr_cpu_state(cpu)->icp);
CHECK_EMULATED_XICS_HCALL(spapr);
args[0] = xirr;
args[1] = cpu_get_host_ticks();
return H_SUCCESS;
}
static target_ulong h_eoi(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
target_ulong xirr = args[0];
CHECK_EMULATED_XICS_HCALL(spapr);
icp_eoi(spapr_cpu_state(cpu)->icp, xirr);
return H_SUCCESS;
}
static target_ulong h_ipoll(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
ICPState *icp = xics_icp_get(XICS_FABRIC(spapr), args[0]);
uint32_t mfrr;
uint32_t xirr;
CHECK_EMULATED_XICS_HCALL(spapr);
if (!icp) {
return H_PARAMETER;
}
xirr = icp_ipoll(icp, &mfrr);
args[0] = xirr;
args[1] = mfrr;
return H_SUCCESS;
}
#define CHECK_EMULATED_XICS_RTAS(spapr, rets) \
do { \
if (!check_emulated_xics((spapr), __func__)) { \
rtas_st((rets), 0, RTAS_OUT_HW_ERROR); \
return; \
} \
} while (0)
static void rtas_set_xive(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token,
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
ICSState *ics = spapr->ics;
uint32_t nr, srcno, server, priority;
CHECK_EMULATED_XICS_RTAS(spapr, rets);
if ((nargs != 3) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
if (!ics) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
nr = rtas_ld(args, 0);
server = rtas_ld(args, 1);
priority = rtas_ld(args, 2);
if (!ics_valid_irq(ics, nr) || !xics_icp_get(XICS_FABRIC(spapr), server)
|| (priority > 0xff)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
srcno = nr - ics->offset;
ics_simple_write_xive(ics, srcno, server, priority, priority);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}
static void rtas_get_xive(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token,
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
ICSState *ics = spapr->ics;
uint32_t nr, srcno;
CHECK_EMULATED_XICS_RTAS(spapr, rets);
if ((nargs != 1) || (nret != 3)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
if (!ics) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
srcno = nr - ics->offset;
rtas_st(rets, 1, ics->irqs[srcno].server);
rtas_st(rets, 2, ics->irqs[srcno].priority);
}
static void rtas_int_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token,
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
ICSState *ics = spapr->ics;
uint32_t nr, srcno;
CHECK_EMULATED_XICS_RTAS(spapr, rets);
if ((nargs != 1) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
if (!ics) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
srcno = nr - ics->offset;
ics_simple_write_xive(ics, srcno, ics->irqs[srcno].server, 0xff,
ics->irqs[srcno].priority);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}
static void rtas_int_on(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token,
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
ICSState *ics = spapr->ics;
uint32_t nr, srcno;
CHECK_EMULATED_XICS_RTAS(spapr, rets);
if ((nargs != 1) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
if (!ics) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
nr = rtas_ld(args, 0);
if (!ics_valid_irq(ics, nr)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
srcno = nr - ics->offset;
ics_simple_write_xive(ics, srcno, ics->irqs[srcno].server,
ics->irqs[srcno].saved_priority,
ics->irqs[srcno].saved_priority);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}
void xics_spapr_init(SpaprMachineState *spapr)
{
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);
}
void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
uint32_t phandle)
{
uint32_t interrupt_server_ranges_prop[] = {
0, cpu_to_be32(nr_servers),
};
int node;
_FDT(node = fdt_add_subnode(fdt, 0, XICS_NODENAME));
_FDT(fdt_setprop_string(fdt, node, "device_type",
"PowerPC-External-Interrupt-Presentation"));
_FDT(fdt_setprop_string(fdt, node, "compatible", "IBM,ppc-xicp"));
_FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0));
_FDT(fdt_setprop(fdt, node, "ibm,interrupt-server-ranges",
interrupt_server_ranges_prop,
sizeof(interrupt_server_ranges_prop)));
_FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2));
_FDT(fdt_setprop_cell(fdt, node, "linux,phandle", phandle));
_FDT(fdt_setprop_cell(fdt, node, "phandle", phandle));
}
Reference in New Issue View Git Blame Copy Permalink