acpi: cpuhp: add CPU devices AML with _STA method

it adds CPU objects to DSDT with _STA method
and QEMU side of CPU hotplug interface initialization
with registers sufficient to handle _STA requests,
including necessary hotplug callbacks in piix4,ich9 code.

Hot-(un)plug hw/acpi parts will be added by
corresponding follow up patches.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2016-06-14 16:02:06 +02:00 committed by Michael S. Tsirkin
parent 16bcab97eb
commit 5e1b5d9388
7 changed files with 313 additions and 6 deletions

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@ -2,6 +2,7 @@ common-obj-$(CONFIG_ACPI_X86) += core.o piix4.o pcihp.o
common-obj-$(CONFIG_ACPI_X86_ICH) += ich9.o tco.o
common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu_hotplug.o
common-obj-$(CONFIG_ACPI_MEMORY_HOTPLUG) += memory_hotplug.o memory_hotplug_acpi_table.o
common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu.o
obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o
common-obj-$(CONFIG_ACPI) += acpi_interface.o
common-obj-$(CONFIG_ACPI) += bios-linker-loader.o

240
hw/acpi/cpu.c Normal file
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@ -0,0 +1,240 @@
#include "qemu/osdep.h"
#include "hw/boards.h"
#include "hw/acpi/cpu.h"
#include "qapi/error.h"
#include "trace.h"
#define ACPI_CPU_HOTPLUG_REG_LEN 12
#define ACPI_CPU_SELECTOR_OFFSET_WR 0
#define ACPI_CPU_FLAGS_OFFSET_RW 4
static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size)
{
uint64_t val = 0;
CPUHotplugState *cpu_st = opaque;
AcpiCpuStatus *cdev;
if (cpu_st->selector >= cpu_st->dev_count) {
return val;
}
cdev = &cpu_st->devs[cpu_st->selector];
switch (addr) {
case ACPI_CPU_FLAGS_OFFSET_RW: /* pack and return is_* fields */
val |= cdev->cpu ? 1 : 0;
trace_cpuhp_acpi_read_flags(cpu_st->selector, val);
break;
default:
break;
}
return val;
}
static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
unsigned int size)
{
CPUHotplugState *cpu_st = opaque;
assert(cpu_st->dev_count);
if (addr) {
if (cpu_st->selector >= cpu_st->dev_count) {
trace_cpuhp_acpi_invalid_idx_selected(cpu_st->selector);
return;
}
}
switch (addr) {
case ACPI_CPU_SELECTOR_OFFSET_WR: /* current CPU selector */
cpu_st->selector = data;
trace_cpuhp_acpi_write_idx(cpu_st->selector);
break;
default:
break;
}
}
static const MemoryRegionOps cpu_hotplug_ops = {
.read = cpu_hotplug_rd,
.write = cpu_hotplug_wr,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
CPUHotplugState *state, hwaddr base_addr)
{
MachineState *machine = MACHINE(qdev_get_machine());
MachineClass *mc = MACHINE_GET_CLASS(machine);
CPUArchIdList *id_list;
int i;
assert(mc->possible_cpu_arch_ids);
id_list = mc->possible_cpu_arch_ids(machine);
state->dev_count = id_list->len;
state->devs = g_new0(typeof(*state->devs), state->dev_count);
for (i = 0; i < id_list->len; i++) {
state->devs[i].cpu = id_list->cpus[i].cpu;
state->devs[i].arch_id = id_list->cpus[i].arch_id;
}
g_free(id_list);
memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state,
"acpi-mem-hotplug", ACPI_CPU_HOTPLUG_REG_LEN);
memory_region_add_subregion(as, base_addr, &state->ctrl_reg);
}
static AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev)
{
CPUClass *k = CPU_GET_CLASS(dev);
uint64_t cpu_arch_id = k->get_arch_id(CPU(dev));
int i;
for (i = 0; i < cpu_st->dev_count; i++) {
if (cpu_arch_id == cpu_st->devs[i].arch_id) {
return &cpu_st->devs[i];
}
}
return NULL;
}
void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
CPUHotplugState *cpu_st, DeviceState *dev, Error **errp)
{
AcpiCpuStatus *cdev;
cdev = get_cpu_status(cpu_st, dev);
if (!cdev) {
return;
}
cdev->cpu = CPU(dev);
}
const VMStateDescription vmstate_cpu_hotplug = {
.name = "CPU hotplug state",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(selector, CPUHotplugState),
VMSTATE_END_OF_LIST()
}
};
#define CPU_NAME_FMT "C%.03X"
#define CPUHP_RES_DEVICE "PRES"
#define CPU_LOCK "CPLK"
#define CPU_STS_METHOD "CSTA"
#define CPU_ENABLED "CPEN"
#define CPU_SELECTOR "CSEL"
void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
hwaddr io_base,
const char *res_root)
{
Aml *ifctx;
Aml *field;
Aml *method;
Aml *cpu_ctrl_dev;
Aml *cpus_dev;
Aml *zero = aml_int(0);
Aml *one = aml_int(1);
Aml *sb_scope = aml_scope("_SB");
MachineClass *mc = MACHINE_GET_CLASS(machine);
CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine);
char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root);
cpu_ctrl_dev = aml_device("%s", cphp_res_path);
{
Aml *crs;
aml_append(cpu_ctrl_dev,
aml_name_decl("_HID", aml_eisaid("PNP0A06")));
aml_append(cpu_ctrl_dev,
aml_name_decl("_UID", aml_string("CPU Hotplug resources")));
aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0));
crs = aml_resource_template();
aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1,
ACPI_CPU_HOTPLUG_REG_LEN));
aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs));
/* declare CPU hotplug MMIO region with related access fields */
aml_append(cpu_ctrl_dev,
aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base),
ACPI_CPU_HOTPLUG_REG_LEN));
field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK,
AML_WRITE_AS_ZEROS);
aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8));
/* 1 if enabled, read only */
aml_append(field, aml_named_field(CPU_ENABLED, 1));
aml_append(cpu_ctrl_dev, field);
field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE);
/* CPU selector, write only */
aml_append(field, aml_named_field(CPU_SELECTOR, 32));
aml_append(cpu_ctrl_dev, field);
}
aml_append(sb_scope, cpu_ctrl_dev);
cpus_dev = aml_device("\\_SB.CPUS");
{
int i;
Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK);
Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR);
Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED);
aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED);
{
Aml *idx = aml_arg(0);
Aml *sta = aml_local(0);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(idx, cpu_selector));
aml_append(method, aml_store(zero, sta));
ifctx = aml_if(aml_equal(is_enabled, one));
{
aml_append(ifctx, aml_store(aml_int(0xF), sta));
}
aml_append(method, ifctx);
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(sta));
}
aml_append(cpus_dev, method);
/* build Processor object for each processor */
for (i = 0; i < arch_ids->len; i++) {
Aml *dev;
Aml *uid = aml_int(i);
int arch_id = arch_ids->cpus[i].arch_id;
if (opts.apci_1_compatible && arch_id < 255) {
dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i);
} else {
dev = aml_device(CPU_NAME_FMT, i);
aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
aml_append(dev, aml_name_decl("_UID", uid));
}
method = aml_method("_STA", 0, AML_SERIALIZED);
aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid)));
aml_append(dev, method);
aml_append(cpus_dev, dev);
}
}
aml_append(sb_scope, cpus_dev);
aml_append(table, sb_scope);
g_free(cphp_res_path);
g_free(arch_ids);
}

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@ -459,9 +459,12 @@ void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
acpi_memory_plug_cb(hotplug_dev, &lpc->pm.acpi_memory_hotplug,
dev, errp);
} else if (lpc->pm.cpu_hotplug_legacy &&
object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
} else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
if (lpc->pm.cpu_hotplug_legacy) {
legacy_acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.gpe_cpu, dev, errp);
} else {
acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.cpuhp_state, dev, errp);
}
} else {
error_setg(errp, "acpi: device plug request for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));

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@ -34,6 +34,7 @@
#include "hw/acpi/piix4.h"
#include "hw/acpi/pcihp.h"
#include "hw/acpi/cpu_hotplug.h"
#include "hw/acpi/cpu.h"
#include "hw/hotplug.h"
#include "hw/mem/pc-dimm.h"
#include "hw/acpi/memory_hotplug.h"
@ -88,6 +89,7 @@ typedef struct PIIX4PMState {
bool cpu_hotplug_legacy;
AcpiCpuHotplug gpe_cpu;
CPUHotplugState cpuhp_state;
MemHotplugState acpi_memory_hotplug;
} PIIX4PMState;
@ -352,9 +354,12 @@ static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug, dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp);
} else if (s->cpu_hotplug_legacy &&
object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
} else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
if (s->cpu_hotplug_legacy) {
legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp);
} else {
acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp);
}
} else {
error_setg(errp, "acpi: device plug request for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));

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@ -16,3 +16,8 @@ mhp_acpi_clear_insert_evt(uint32_t slot) "slot[0x%"PRIx32"] clear insert event"
mhp_acpi_clear_remove_evt(uint32_t slot) "slot[0x%"PRIx32"] clear remove event"
mhp_acpi_pc_dimm_deleted(uint32_t slot) "slot[0x%"PRIx32"] pc-dimm deleted"
mhp_acpi_pc_dimm_delete_failed(uint32_t slot) "slot[0x%"PRIx32"] pc-dimm delete failed"
# hw/acpi/cpu.c
cpuhp_acpi_invalid_idx_selected(uint32_t idx) "0x%"PRIx32
cpuhp_acpi_read_flags(uint32_t idx, uint8_t flags) "idx[0x%"PRIx32"] flags: 0x%"PRIx8
cpuhp_acpi_write_idx(uint32_t idx) "set active cpu idx: 0x%"PRIx32

51
include/hw/acpi/cpu.h Normal file
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@ -0,0 +1,51 @@
/*
* QEMU ACPI hotplug utilities
*
* Copyright (C) 2016 Red Hat Inc
*
* Authors:
* Igor Mammedov <imammedo@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef ACPI_CPU_H
#define ACPI_CPU_H
#include "hw/qdev-core.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/aml-build.h"
#include "hw/hotplug.h"
typedef struct AcpiCpuStatus {
struct CPUState *cpu;
uint64_t arch_id;
} AcpiCpuStatus;
typedef struct CPUHotplugState {
MemoryRegion ctrl_reg;
uint32_t selector;
uint32_t dev_count;
AcpiCpuStatus *devs;
} CPUHotplugState;
void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
CPUHotplugState *cpu_st, DeviceState *dev, Error **errp);
void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
CPUHotplugState *state, hwaddr base_addr);
typedef struct CPUHotplugFeatures {
bool apci_1_compatible;
} CPUHotplugFeatures;
void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
hwaddr io_base,
const char *res_root);
extern const VMStateDescription vmstate_cpu_hotplug;
#define VMSTATE_CPU_HOTPLUG(cpuhp, state) \
VMSTATE_STRUCT(cpuhp, state, 1, \
vmstate_cpu_hotplug, CPUHotplugState)
#endif

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@ -23,6 +23,7 @@
#include "hw/acpi/acpi.h"
#include "hw/acpi/cpu_hotplug.h"
#include "hw/acpi/cpu.h"
#include "hw/acpi/memory_hotplug.h"
#include "hw/acpi/acpi_dev_interface.h"
#include "hw/acpi/tco.h"
@ -50,6 +51,7 @@ typedef struct ICH9LPCPMRegs {
bool cpu_hotplug_legacy;
AcpiCpuHotplug gpe_cpu;
CPUHotplugState cpuhp_state;
MemHotplugState acpi_memory_hotplug;