static void *qemu_tcg_cpu_thread_fn(void *arg)
{
CPUArchState *env = arg;
qemu_tcg_init_cpu_signals();
qemu_thread_get_self(env->thread);
/* signal CPU creation */
qemu_mutex_lock(&qemu_global_mutex);
for (env = first_cpu; env != NULL; env = env->next_cpu) {
env->thread_id = qemu_get_thread_id();
env->created = 1;
}
qemu_cond_signal(&qemu_cpu_cond);
/* wait for initial kick-off after machine start */
while (first_cpu->stopped) {
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
/* process any pending work */
for (env = first_cpu; env != NULL; env = env->next_cpu) {
qemu_wait_io_event_common(env);
}
}
while (1) {
tcg_exec_all();
if (use_icount && qemu_clock_deadline(vm_clock) <= 0) {
qemu_notify_event();
}
qemu_tcg_wait_io_event();
}
return NULL;
}
static void qemu_tcg_wait_io_event(void)
{
CPUArchState *env;
while (all_cpu_threads_idle()) {
#ifdef CONFIG_S2E_DEBUG
s2e_debug_print("CPU: qemu_tcg_wait_io_event: waiting for awaken cpu %p\n", tcg_halt_cond);
#endif
/* Start accounting real time to the virtual clock if the CPUs
are idle. */
qemu_clock_warp(vm_clock);
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
}
while (iothread_requesting_mutex) {
#ifdef CONFIG_S2E_DEBUG
s2e_debug_print("CPU: qemu_tcg_wait_io_event iothread_requesting_mutex\n");
#endif
qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
}
for (env = first_cpu; env != NULL; env = env->next_cpu) {
qemu_wait_io_event_common(env);
}
}
static void qemu_tcg_wait_io_event(void)
{
CPUState *env;
while (all_cpu_threads_idle()) {
/* Start accounting real time to the virtual clock if the CPUs
are idle. */
qemu_clock_warp(vm_clock);
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
}
qemu_mutex_unlock(&qemu_global_mutex);
/*
* Users of qemu_global_mutex can be starved, having no chance
* to acquire it since this path will get to it first.
* So use another lock to provide fairness.
*/
qemu_mutex_lock(&qemu_fair_mutex);
qemu_mutex_unlock(&qemu_fair_mutex);
qemu_mutex_lock(&qemu_global_mutex);
for (env = first_cpu; env != NULL; env = env->next_cpu) {
qemu_wait_io_event_common(env);
}
}
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (!cpu_has_work(env))
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
qemu_kvm_eat_signal(env, 0);
qemu_wait_io_event_common(env);
}
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (cpu_thread_is_idle(env)) {
qemu_cond_wait(env->halt_cond, &qemu_global_mutex);
}
qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(env);
}
static void qemu_kvm_wait_io_event(CPUArchState *env)
{
CPUState *cpu = ENV_GET_CPU(env);
while (cpu_thread_is_idle(env)) {
qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex);
}
qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(cpu);
}
static void qemu_wait_io_event(CPUState *env)
{
while (!tcg_has_work())
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
qemu_mutex_unlock(&qemu_global_mutex);
/*
* Users of qemu_global_mutex can be starved, having no chance
* to acquire it since this path will get to it first.
* So use another lock to provide fairness.
*/
qemu_mutex_lock(&qemu_fair_mutex);
qemu_mutex_unlock(&qemu_fair_mutex);
qemu_mutex_lock(&qemu_global_mutex);
qemu_wait_io_event_common(env);
}
static void qemu_tcg_wait_io_event(void)
{
CPUArchState *env;
while (all_cpu_threads_idle()) {
/* Start accounting real time to the virtual clock if the CPUs
are idle. */
qemu_clock_warp(vm_clock);
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
}
while (iothread_requesting_mutex) {
qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
}
for (env = first_cpu; env != NULL; env = env->next_cpu) {
qemu_wait_io_event_common(ENV_GET_CPU(env));
}
}
static void qemu_tcg_wait_io_event(void)
{
CPUState *cpu;
while (all_cpu_threads_idle()) {
/* Start accounting real time to the virtual clock if the CPUs
are idle. */
qemu_clock_warp(QEMU_CLOCK_VIRTUAL);
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
}
while (iothread_requesting_mutex) {
qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex);
}
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
qemu_wait_io_event_common(cpu);
}
}
static void *qemu_dummy_cpu_thread_fn(void *arg)
{
#ifdef _WIN32
fprintf(stderr, "qtest is not supported under Windows\n");
exit(1);
#else
CPUArchState *env = arg;
CPUState *cpu = ENV_GET_CPU(env);
sigset_t waitset;
int r;
qemu_mutex_lock_iothread();
qemu_thread_get_self(cpu->thread);
cpu->thread_id = qemu_get_thread_id();
sigemptyset(&waitset);
sigaddset(&waitset, SIG_IPI);
/* signal CPU creation */
cpu->created = true;
qemu_cond_signal(&qemu_cpu_cond);
cpu_single_env = env;
while (1) {
cpu_single_env = NULL;
qemu_mutex_unlock_iothread();
do {
int sig;
r = sigwait(&waitset, &sig);
} while (r == -1 && (errno == EAGAIN || errno == EINTR));
if (r == -1) {
perror("sigwait");
exit(1);
}
qemu_mutex_lock_iothread();
cpu_single_env = env;
qemu_wait_io_event_common(cpu);
}
return NULL;
#endif
}
static void qemu_tcg_wait_io_event(void)
{
CPUState *env;
while (!any_cpu_has_work())
qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
qemu_mutex_unlock(&qemu_global_mutex);
/*
* Users of qemu_global_mutex can be starved, having no chance
* to acquire it since this path will get to it first.
* So use another lock to provide fairness.
*/
qemu_mutex_lock(&qemu_fair_mutex);
qemu_mutex_unlock(&qemu_fair_mutex);
qemu_mutex_lock(&qemu_global_mutex);
for (env = first_cpu; env != NULL; env = env->next_cpu) {
qemu_wait_io_event_common(env);
}
}
static void *qemu_tcg_cpu_thread_fn(void *arg)
{
CPUState *cpu = arg;
qemu_tcg_init_cpu_signals();
qemu_thread_get_self(cpu->thread);
qemu_mutex_lock(&qemu_global_mutex);
qemu_for_each_cpu(tcg_signal_cpu_creation, NULL);
qemu_cond_signal(&qemu_cpu_cond);
/* wait for initial kick-off after machine start */
while (first_cpu->stopped) {
qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex);
/* process any pending work */
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) {
qemu_wait_io_event_common(cpu);
}
}
while (1) {
tcg_exec_all();
if (use_icount) {
int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
if (deadline == 0) {
qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
}
}
qemu_tcg_wait_io_event();
}
return NULL;
}
