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cpu.c
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cpu.c
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/*
* QEMU CPU model
*
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see
* <http://www.gnu.org/licenses/gpl-2.0.html>
*/
#include "qemu-common.h"
#include "qom/cpu.h"
#include "sysemu/kvm.h"
#include "qemu/notify.h"
#include "qemu/log.h"
#include "sysemu/sysemu.h"
bool cpu_exists(int64_t id)
{
CPUState *cpu;
CPU_FOREACH(cpu) {
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->get_arch_id(cpu) == id) {
return true;
}
}
return false;
}
bool cpu_paging_enabled(const CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return cc->get_paging_enabled(cpu);
}
static bool cpu_common_get_paging_enabled(const CPUState *cpu)
{
return false;
}
void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
Error **errp)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return cc->get_memory_mapping(cpu, list, errp);
}
static void cpu_common_get_memory_mapping(CPUState *cpu,
MemoryMappingList *list,
Error **errp)
{
error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
}
/* CPU hot-plug notifiers */
static NotifierList cpu_added_notifiers =
NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
void qemu_register_cpu_added_notifier(Notifier *notifier)
{
notifier_list_add(&cpu_added_notifiers, notifier);
}
void cpu_reset_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request &= ~mask;
}
void cpu_exit(CPUState *cpu)
{
cpu->exit_request = 1;
cpu->tcg_exit_req = 1;
}
int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
void *opaque)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return (*cc->write_elf32_qemunote)(f, cpu, opaque);
}
static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
CPUState *cpu, void *opaque)
{
return -1;
}
int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
int cpuid, void *opaque)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
}
static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
CPUState *cpu, int cpuid,
void *opaque)
{
return -1;
}
int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
void *opaque)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return (*cc->write_elf64_qemunote)(f, cpu, opaque);
}
static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
CPUState *cpu, void *opaque)
{
return -1;
}
int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
int cpuid, void *opaque)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
}
static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
CPUState *cpu, int cpuid,
void *opaque)
{
return -1;
}
static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
{
return 0;
}
static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
{
return 0;
}
void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->dump_state) {
cpu_synchronize_state(cpu);
cc->dump_state(cpu, f, cpu_fprintf, flags);
}
}
void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
int flags)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (cc->dump_statistics) {
cc->dump_statistics(cpu, f, cpu_fprintf, flags);
}
}
void cpu_reset(CPUState *cpu)
{
CPUClass *klass = CPU_GET_CLASS(cpu);
if (klass->reset != NULL) {
(*klass->reset)(cpu);
}
}
static void cpu_common_reset(CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
log_cpu_state(cpu, cc->reset_dump_flags);
}
cpu->interrupt_request = 0;
cpu->current_tb = NULL;
cpu->halted = 0;
}
ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
{
CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
return cc->class_by_name(cpu_model);
}
static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
{
return NULL;
}
static void cpu_common_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cpu = CPU(dev);
if (dev->hotplugged) {
cpu_synchronize_post_init(cpu);
notifier_list_notify(&cpu_added_notifiers, dev);
cpu_resume(cpu);
}
}
static void cpu_common_initfn(Object *obj)
{
CPUState *cpu = CPU(obj);
CPUClass *cc = CPU_GET_CLASS(obj);
cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
}
static int64_t cpu_common_get_arch_id(CPUState *cpu)
{
return cpu->cpu_index;
}
static void cpu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
CPUClass *k = CPU_CLASS(klass);
k->class_by_name = cpu_common_class_by_name;
k->reset = cpu_common_reset;
k->get_arch_id = cpu_common_get_arch_id;
k->get_paging_enabled = cpu_common_get_paging_enabled;
k->get_memory_mapping = cpu_common_get_memory_mapping;
k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
k->write_elf32_note = cpu_common_write_elf32_note;
k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
k->write_elf64_note = cpu_common_write_elf64_note;
k->gdb_read_register = cpu_common_gdb_read_register;
k->gdb_write_register = cpu_common_gdb_write_register;
dc->realize = cpu_common_realizefn;
/*
* Reason: CPUs still need special care by board code: wiring up
* IRQs, adding reset handlers, halting non-first CPUs, ...
*/
dc->cannot_instantiate_with_device_add_yet = true;
}
static const TypeInfo cpu_type_info = {
.name = TYPE_CPU,
.parent = TYPE_DEVICE,
.instance_size = sizeof(CPUState),
.instance_init = cpu_common_initfn,
.abstract = true,
.class_size = sizeof(CPUClass),
.class_init = cpu_class_init,
};
static void cpu_register_types(void)
{
type_register_static(&cpu_type_info);
}
type_init(cpu_register_types)