void qemu_notify_event(void)
{
CPUOldState *env = cpu_single_env;
if (env) {
cpu_exit(env);
/*
* This is mainly for the Windows host, where the timer may be in
* a different thread with vcpu. Thus the timer function needs to
* notify the vcpu thread of more than simply cpu_exit. If env is
* not NULL, it means that the vcpu is in execute state, we need
* only to set the flags. If the guest is in execute state, the
* HAX kernel module will exit to qemu. If env is NULL, vcpu is
* in main_loop_wait, and we need a event to notify it.
*/
#ifdef CONFIG_HAX
if (hax_enabled())
hax_raise_event(env);
} else {
#ifdef _WIN32
if(hax_enabled())
SetEvent(qemu_event_handle);
#endif
}
#else
}
static void apic_common_realize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
APICCommonClass *info;
static DeviceState *vapic;
int instance_id = s->id;
info = APIC_COMMON_GET_CLASS(s);
info->realize(dev, errp);
/* Note: We need at least 1M to map the VAPIC option ROM */
if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
!hax_enabled() && ram_size >= 1024 * 1024) {
vapic = sysbus_create_simple("kvmvapic", -1, NULL);
}
s->vapic = vapic;
if (apic_report_tpr_access && info->enable_tpr_reporting) {
info->enable_tpr_reporting(s, true);
}
if (s->legacy_instance_id) {
instance_id = -1;
}
vmstate_register_with_alias_id(NULL, instance_id, &vmstate_apic_common,
s, -1, 0, NULL);
}
void main_loop(void)
{
int r;
#ifdef CONFIG_HAX
if (hax_enabled())
hax_sync_vcpus();
#endif
for (;;) {
do {
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
tcg_cpu_exec();
#ifdef CONFIG_PROFILER
ti = profile_getclock();
#endif
main_loop_wait(qemu_calculate_timeout());
#ifdef CONFIG_PROFILER
dev_time += profile_getclock() - ti;
#endif
qemu_log_rotation_poll();
} while (vm_can_run());
if (qemu_debug_requested())
vm_stop(EXCP_DEBUG);
if (qemu_shutdown_requested()) {
if (no_shutdown) {
vm_stop(0);
no_shutdown = 0;
} else {
if (savevm_on_exit != NULL) {
/* Prior to saving VM to the snapshot file, save HW config
* settings for that VM, so we can match them when VM gets
* loaded from the snapshot. */
snaphost_save_config(savevm_on_exit);
do_savevm(cur_mon, savevm_on_exit);
}
break;
}
}
if (qemu_reset_requested()) {
pause_all_vcpus();
qemu_system_reset();
resume_all_vcpus();
}
if (qemu_powerdown_requested())
qemu_system_powerdown();
if ((r = qemu_vmstop_requested()))
vm_stop(r);
}
pause_all_vcpus();
}
static void hax_vcpu_sync_state(CPUArchState *env, int modified)
{
if (hax_enabled()) {
if (modified) {
hax_arch_set_registers(env);
} else {
hax_arch_get_registers(env);
}
}
}
void qemu_init_vcpu(void *_env)
{
CPUOldState *env = _env;
if (kvm_enabled())
kvm_init_vcpu(env);
#ifdef CONFIG_HAX
if (hax_enabled())
hax_init_vcpu(env);
#endif
return;
}
void qemu_notify_event(void)
{
CPUState *env = cpu_single_env;
if (env) {
cpu_exit(env);
#ifdef USE_KQEMU
if (env->kqemu_enabled)
kqemu_cpu_interrupt(env);
#endif
#ifdef CONFIG_HAX
if (hax_enabled())
hax_raise_event(env);
} else {
#ifdef _WIN32
if(hax_enabled())
SetEvent(qemu_event_handle);
#endif
}
#else
}
/*
* much simpler than kvm, at least in first stage because:
* We don't need consider the device pass-through, we don't need
* consider the framebuffer, and we may even remove the bios at all
*/
int hax_sync_vcpus(void)
{
if (hax_enabled()) {
CPUState *cpu;
cpu = first_cpu;
if (!cpu) {
return 0;
}
for (; cpu != NULL; cpu = CPU_NEXT(cpu)) {
int ret;
ret = hax_arch_set_registers(cpu->env_ptr);
if (ret < 0) {
return ret;
}
}
}
return 0;
}
/*
* Ask hax kernel module to run the CPU for us till:
* 1. Guest crash or shutdown
* 2. Need QEMU's emulation like guest execute MMIO instruction
* 3. Guest execute HLT
* 4. QEMU have Signal/event pending
* 5. An unknown VMX exit happens
*/
static int hax_vcpu_hax_exec(CPUArchState *env)
{
int ret = 0;
CPUState *cpu = ENV_GET_CPU(env);
X86CPU *x86_cpu = X86_CPU(cpu);
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
struct hax_tunnel *ht = vcpu->tunnel;
if (!hax_enabled()) {
DPRINTF("Trying to vcpu execute at eip:" TARGET_FMT_lx "\n", env->eip);
return 0;
}
cpu->halted = 0;
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(x86_cpu->apic_state);
}
if (cpu->interrupt_request & CPU_INTERRUPT_INIT) {
DPRINTF("\nhax_vcpu_hax_exec: handling INIT for %d\n",
cpu->cpu_index);
do_cpu_init(x86_cpu);
hax_vcpu_sync_state(env, 1);
}
if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) {
DPRINTF("hax_vcpu_hax_exec: handling SIPI for %d\n",
cpu->cpu_index);
hax_vcpu_sync_state(env, 0);
do_cpu_sipi(x86_cpu);
hax_vcpu_sync_state(env, 1);
}
do {
int hax_ret;
if (cpu->exit_request) {
ret = 1;
break;
}
hax_vcpu_interrupt(env);
qemu_mutex_unlock_iothread();
cpu_exec_start(cpu);
hax_ret = hax_vcpu_run(vcpu);
cpu_exec_end(cpu);
qemu_mutex_lock_iothread();
/* Simply continue the vcpu_run if system call interrupted */
if (hax_ret == -EINTR || hax_ret == -EAGAIN) {
DPRINTF("io window interrupted\n");
continue;
}
if (hax_ret < 0) {
fprintf(stderr, "vcpu run failed for vcpu %x\n", vcpu->vcpu_id);
abort();
}
switch (ht->_exit_status) {
case HAX_EXIT_IO:
ret = hax_handle_io(env, ht->pio._df, ht->pio._port,
ht->pio._direction,
ht->pio._size, ht->pio._count, vcpu->iobuf);
break;
case HAX_EXIT_FAST_MMIO:
ret = hax_handle_fastmmio(env, (struct hax_fastmmio *) vcpu->iobuf);
break;
/* Guest state changed, currently only for shutdown */
case HAX_EXIT_STATECHANGE:
fprintf(stdout, "VCPU shutdown request\n");
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
hax_vcpu_sync_state(env, 0);
ret = 1;
break;
case HAX_EXIT_UNKNOWN_VMEXIT:
fprintf(stderr, "Unknown VMX exit %x from guest\n",
ht->_exit_reason);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
hax_vcpu_sync_state(env, 0);
cpu_dump_state(cpu, stderr, fprintf, 0);
ret = -1;
break;
case HAX_EXIT_HLT:
if (!(cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
!(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
/* hlt instruction with interrupt disabled is shutdown */
env->eflags |= IF_MASK;
cpu->halted = 1;
cpu->exception_index = EXCP_HLT;
ret = 1;
}
break;
/* these situations will continue to hax module */
case HAX_EXIT_INTERRUPT:
case HAX_EXIT_PAUSED:
break;
case HAX_EXIT_MMIO:
/* Should not happen on UG system */
fprintf(stderr, "HAX: unsupported MMIO emulation\n");
ret = -1;
break;
case HAX_EXIT_REAL:
/* Should not happen on UG system */
fprintf(stderr, "HAX: unimplemented real mode emulation\n");
ret = -1;
break;
default:
fprintf(stderr, "Unknown exit %x from HAX\n", ht->_exit_status);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
hax_vcpu_sync_state(env, 0);
cpu_dump_state(cpu, stderr, fprintf, 0);
ret = 1;
break;
}
} while (!ret);
if (cpu->exit_request) {
cpu->exit_request = 0;
cpu->exception_index = EXCP_INTERRUPT;
}
return ret < 0;
}
