mirror of
https://github.com/qemu/qemu.git
synced 2024-12-12 05:03:42 +08:00
412ae12647
Continuing the refactor of a48e7d9e52 (gdbstub: move guest debug support
check to ops) by removing hardcoded kvm_enabled() from generic cpu.c
code, and replace it with a property of AccelOpsClass.
Signed-off-by: Mads Ynddal <m.ynddal@samsung.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230207131721.49233-1-mads@ynddal.dk>
[AJB: add ifdef around update_guest_debug_ops, fix brace]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-27-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-30-richard.henderson@linaro.org>
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/*
|
|
* QEMU KVM support
|
|
*
|
|
* Copyright IBM, Corp. 2008
|
|
* Red Hat, Inc. 2008
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
* Glauber Costa <gcosta@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.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qemu/main-loop.h"
|
|
#include "sysemu/kvm.h"
|
|
#include "sysemu/kvm_int.h"
|
|
#include "sysemu/runstate.h"
|
|
#include "sysemu/cpus.h"
|
|
#include "qemu/guest-random.h"
|
|
#include "qapi/error.h"
|
|
|
|
#include <linux/kvm.h>
|
|
#include "kvm-cpus.h"
|
|
|
|
static void *kvm_vcpu_thread_fn(void *arg)
|
|
{
|
|
CPUState *cpu = arg;
|
|
int r;
|
|
|
|
rcu_register_thread();
|
|
|
|
qemu_mutex_lock_iothread();
|
|
qemu_thread_get_self(cpu->thread);
|
|
cpu->thread_id = qemu_get_thread_id();
|
|
cpu->can_do_io = 1;
|
|
current_cpu = cpu;
|
|
|
|
r = kvm_init_vcpu(cpu, &error_fatal);
|
|
kvm_init_cpu_signals(cpu);
|
|
|
|
/* signal CPU creation */
|
|
cpu_thread_signal_created(cpu);
|
|
qemu_guest_random_seed_thread_part2(cpu->random_seed);
|
|
|
|
do {
|
|
if (cpu_can_run(cpu)) {
|
|
r = kvm_cpu_exec(cpu);
|
|
if (r == EXCP_DEBUG) {
|
|
cpu_handle_guest_debug(cpu);
|
|
}
|
|
}
|
|
qemu_wait_io_event(cpu);
|
|
} while (!cpu->unplug || cpu_can_run(cpu));
|
|
|
|
kvm_destroy_vcpu(cpu);
|
|
cpu_thread_signal_destroyed(cpu);
|
|
qemu_mutex_unlock_iothread();
|
|
rcu_unregister_thread();
|
|
return NULL;
|
|
}
|
|
|
|
static void kvm_start_vcpu_thread(CPUState *cpu)
|
|
{
|
|
char thread_name[VCPU_THREAD_NAME_SIZE];
|
|
|
|
cpu->thread = g_malloc0(sizeof(QemuThread));
|
|
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
|
|
qemu_cond_init(cpu->halt_cond);
|
|
snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
|
|
cpu->cpu_index);
|
|
qemu_thread_create(cpu->thread, thread_name, kvm_vcpu_thread_fn,
|
|
cpu, QEMU_THREAD_JOINABLE);
|
|
}
|
|
|
|
static bool kvm_vcpu_thread_is_idle(CPUState *cpu)
|
|
{
|
|
return !kvm_halt_in_kernel();
|
|
}
|
|
|
|
static bool kvm_cpus_are_resettable(void)
|
|
{
|
|
return !kvm_enabled() || kvm_cpu_check_are_resettable();
|
|
}
|
|
|
|
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
|
static int kvm_update_guest_debug_ops(CPUState *cpu)
|
|
{
|
|
return kvm_update_guest_debug(cpu, 0);
|
|
}
|
|
#endif
|
|
|
|
static void kvm_accel_ops_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
|
|
|
|
ops->create_vcpu_thread = kvm_start_vcpu_thread;
|
|
ops->cpu_thread_is_idle = kvm_vcpu_thread_is_idle;
|
|
ops->cpus_are_resettable = kvm_cpus_are_resettable;
|
|
ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset;
|
|
ops->synchronize_post_init = kvm_cpu_synchronize_post_init;
|
|
ops->synchronize_state = kvm_cpu_synchronize_state;
|
|
ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm;
|
|
|
|
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
|
ops->update_guest_debug = kvm_update_guest_debug_ops;
|
|
ops->supports_guest_debug = kvm_supports_guest_debug;
|
|
ops->insert_breakpoint = kvm_insert_breakpoint;
|
|
ops->remove_breakpoint = kvm_remove_breakpoint;
|
|
ops->remove_all_breakpoints = kvm_remove_all_breakpoints;
|
|
#endif
|
|
}
|
|
|
|
static const TypeInfo kvm_accel_ops_type = {
|
|
.name = ACCEL_OPS_NAME("kvm"),
|
|
|
|
.parent = TYPE_ACCEL_OPS,
|
|
.class_init = kvm_accel_ops_class_init,
|
|
.abstract = true,
|
|
};
|
|
|
|
static void kvm_accel_ops_register_types(void)
|
|
{
|
|
type_register_static(&kvm_accel_ops_type);
|
|
}
|
|
type_init(kvm_accel_ops_register_types);
|