static void qemu_tcg_init_vcpu(void *_env)
{
CPUArchState *env = _env;
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
#ifdef CONFIG_S2E
/* Forks inherit parent's memory, therefore we do not want
to allocate new memory regions, just overwrite them. */
if (!s2e_is_forking()) {
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
}
#else
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
#endif
qemu_cond_init(env->halt_cond);
tcg_halt_cond = env->halt_cond;
qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env,
QEMU_THREAD_JOINABLE);
#ifdef _WIN32
env->hThread = qemu_thread_get_handle(env->thread);
#endif
while (env->created == 0) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
tcg_cpu_thread = env->thread;
} else {
env->thread = tcg_cpu_thread;
env->halt_cond = tcg_halt_cond;
}
}
void qio_task_run_in_thread(QIOTask *task,
QIOTaskWorker worker,
gpointer opaque,
GDestroyNotify destroy,
GMainContext *context)
{
struct QIOTaskThreadData *data = g_new0(struct QIOTaskThreadData, 1);
QemuThread thread;
if (context) {
g_main_context_ref(context);
}
data->task = task;
data->worker = worker;
data->opaque = opaque;
data->destroy = destroy;
data->context = context;
trace_qio_task_thread_start(task, worker, opaque);
qemu_thread_create(&thread,
"io-task-worker",
qio_task_thread_worker,
data,
QEMU_THREAD_DETACHED);
}
static void test_callback(void)
{
CallbackTestData data;
QemuThread thread;
int ret;
char c;
rfifolock_init(&data.lock, rfifolock_cb, &data);
ret = qemu_pipe(data.fd);
g_assert(ret == 0);
/* Hold lock but allow the callback to kick us by writing to the pipe */
rfifolock_lock(&data.lock);
qemu_thread_create(&thread, "callback_thread",
callback_thread, &data, QEMU_THREAD_JOINABLE);
ret = read(data.fd[0], &c, sizeof(c));
g_assert(ret == 1);
rfifolock_unlock(&data.lock);
/* If we got here then the callback was invoked, as expected */
qemu_thread_join(&thread);
close(data.fd[0]);
close(data.fd[1]);
rfifolock_destroy(&data.lock);
}
static void test_acquire(void)
{
QemuThread thread;
AcquireTestData data;
/* Dummy event notifier ensures aio_poll() will block */
event_notifier_init(&data.notifier, false);
set_event_notifier(ctx, &data.notifier, dummy_notifier_read);
g_assert(!aio_poll(ctx, false)); /* consume aio_notify() */
qemu_mutex_init(&data.start_lock);
qemu_mutex_lock(&data.start_lock);
data.thread_acquired = false;
qemu_thread_create(&thread, "test_acquire_thread",
test_acquire_thread,
&data, QEMU_THREAD_JOINABLE);
/* Block in aio_poll(), let other thread kick us and acquire context */
aio_context_acquire(ctx);
qemu_mutex_unlock(&data.start_lock); /* let the thread run */
g_assert(aio_poll(ctx, true));
g_assert(!data.thread_acquired);
aio_context_release(ctx);
qemu_thread_join(&thread);
set_event_notifier(ctx, &data.notifier, NULL);
event_notifier_cleanup(&data.notifier);
g_assert(data.thread_acquired);
}
static void iothread_complete(UserCreatable *obj, Error **errp)
{
Error *local_error = NULL;
IOThread *iothread = IOTHREAD(obj);
char *name, *thread_name;
iothread->stopping = false;
iothread->thread_id = -1;
iothread->ctx = aio_context_new(&local_error);
if (!iothread->ctx) {
error_propagate(errp, local_error);
return;
}
qemu_mutex_init(&iothread->init_done_lock);
qemu_cond_init(&iothread->init_done_cond);
/* This assumes we are called from a thread with useful CPU affinity for us
* to inherit.
*/
name = object_get_canonical_path_component(OBJECT(obj));
thread_name = g_strdup_printf("IO %s", name);
qemu_thread_create(&iothread->thread, thread_name, iothread_run,
iothread, QEMU_THREAD_JOINABLE);
g_free(thread_name);
g_free(name);
/* Wait for initialization to complete */
qemu_mutex_lock(&iothread->init_done_lock);
while (iothread->thread_id == -1) {
qemu_cond_wait(&iothread->init_done_cond,
&iothread->init_done_lock);
}
qemu_mutex_unlock(&iothread->init_done_lock);
}
static void iothread_complete(UserCreatable *obj, Error **errp)
{
Error *local_error = NULL;
IOThread *iothread = IOTHREAD(obj);
iothread->stopping = false;
iothread->thread_id = -1;
iothread->ctx = aio_context_new(&local_error);
if (!iothread->ctx) {
error_propagate(errp, local_error);
return;
}
qemu_mutex_init(&iothread->init_done_lock);
qemu_cond_init(&iothread->init_done_cond);
/* This assumes we are called from a thread with useful CPU affinity for us
* to inherit.
*/
qemu_thread_create(&iothread->thread, "iothread", iothread_run,
iothread, QEMU_THREAD_JOINABLE);
/* Wait for initialization to complete */
qemu_mutex_lock(&iothread->init_done_lock);
while (iothread->thread_id == -1) {
qemu_cond_wait(&iothread->init_done_cond,
&iothread->init_done_lock);
}
qemu_mutex_unlock(&iothread->init_done_lock);
}
static void kvm_start_vcpu(CPUState *env)
{
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, kvm_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
}
static void create_thread(void *(*func)(void *))
{
if (n_threads >= NR_THREADS) {
fprintf(stderr, "Thread limit of %d exceeded!\n", NR_THREADS);
exit(-1);
}
qemu_thread_create(&threads[n_threads], "test", func, &data[n_threads],
QEMU_THREAD_JOINABLE);
n_threads++;
}
static void qemu_kvm_start_vcpu(CPUState *env)
{
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
while (env->created == 0) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
}
static void qemu_dummy_start_vcpu(CPUArchState *env)
{
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_dummy_cpu_thread_fn, env,
QEMU_THREAD_JOINABLE);
while (env->created == 0) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
}
static void qemu_dummy_start_vcpu(CPUState *cpu)
{
cpu->thread = g_malloc0(sizeof(QemuThread));
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(cpu->halt_cond);
qemu_thread_create(cpu->thread, qemu_dummy_cpu_thread_fn, cpu,
QEMU_THREAD_JOINABLE);
while (!cpu->created) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
}
static void start_comp_thread(RdmaBackendDev *backend_dev)
{
char thread_name[THR_NAME_LEN] = {};
stop_backend_thread(&backend_dev->comp_thread);
snprintf(thread_name, sizeof(thread_name), "rdma_comp_%s",
ibv_get_device_name(backend_dev->ib_dev));
backend_dev->comp_thread.run = true;
qemu_thread_create(&backend_dev->comp_thread.thread, thread_name,
comp_handler_thread, backend_dev, QEMU_THREAD_DETACHED);
}
static void qemu_kvm_start_vcpu(CPUArchState *env)
{
CPUState *cpu = ENV_GET_CPU(env);
cpu->thread = g_malloc0(sizeof(QemuThread));
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(cpu->halt_cond);
qemu_thread_create(cpu->thread, qemu_kvm_cpu_thread_fn, env,
QEMU_THREAD_JOINABLE);
while (!cpu->created) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
}
int postcopy_ram_enable_notify(MigrationIncomingState *mis)
{
/* Open the fd for the kernel to give us userfaults */
mis->userfault_fd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
if (mis->userfault_fd == -1) {
error_report("%s: Failed to open userfault fd: %s", __func__,
strerror(errno));
return -1;
}
/*
* Although the host check already tested the API, we need to
* do the check again as an ABI handshake on the new fd.
*/
if (!ufd_check_and_apply(mis->userfault_fd, mis)) {
return -1;
}
/* Now an eventfd we use to tell the fault-thread to quit */
mis->userfault_event_fd = eventfd(0, EFD_CLOEXEC);
if (mis->userfault_event_fd == -1) {
error_report("%s: Opening userfault_event_fd: %s", __func__,
strerror(errno));
close(mis->userfault_fd);
return -1;
}
qemu_sem_init(&mis->fault_thread_sem, 0);
qemu_thread_create(&mis->fault_thread, "postcopy/fault",
postcopy_ram_fault_thread, mis, QEMU_THREAD_JOINABLE);
qemu_sem_wait(&mis->fault_thread_sem);
qemu_sem_destroy(&mis->fault_thread_sem);
mis->have_fault_thread = true;
/* Mark so that we get notified of accesses to unwritten areas */
if (qemu_ram_foreach_block(ram_block_enable_notify, mis)) {
return -1;
}
/*
* Ballooning can mark pages as absent while we're postcopying
* that would cause false userfaults.
*/
qemu_balloon_inhibit(true);
trace_postcopy_ram_enable_notify();
return 0;
}
void migrate_fd_connect(MigrationState *s)
{
s->state = MIG_STATE_ACTIVE;
trace_migrate_set_state(MIG_STATE_ACTIVE);
/* This is a best 1st approximation. ns to ms */
s->expected_downtime = max_downtime/1000000;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
qemu_file_set_rate_limit(s->file,
s->bandwidth_limit / XFER_LIMIT_RATIO);
qemu_thread_create(&s->thread, migration_thread, s,
QEMU_THREAD_JOINABLE);
notifier_list_notify(&migration_state_notifiers, s);
}
void migrate_fd_connect(MigrationState *s)
{
s->state = MIG_STATE_ACTIVE;
s->bytes_xfer = 0;
s->buffer = NULL;
s->buffer_size = 0;
s->buffer_capacity = 0;
s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO;
s->complete = false;
s->file = qemu_fopen_ops(s, &buffered_file_ops);
qemu_thread_create(&s->thread, buffered_file_thread, s,
QEMU_THREAD_DETACHED);
notifier_list_notify(&migration_state_notifiers, s);
}
static void tcg_init_vcpu(void *_env)
{
CPUState *env = _env;
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, tcg_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
tcg_cpu_thread = env->thread;
tcg_halt_cond = env->halt_cond;
} else {
env->thread = tcg_cpu_thread;
env->halt_cond = tcg_halt_cond;
}
}
void migrate_fd_connect(MigrationState *s)
{
s->state = MIGRATION_STATUS_SETUP;
trace_migrate_set_state(MIGRATION_STATUS_SETUP);
/* This is a best 1st approximation. ns to ms */
s->expected_downtime = max_downtime/1000000;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
qemu_file_set_rate_limit(s->file,
s->bandwidth_limit / XFER_LIMIT_RATIO);
/* Notify before starting migration thread */
notifier_list_notify(&migration_state_notifiers, s);
migrate_compress_threads_create();
qemu_thread_create(&s->thread, "migration", migration_thread, s,
QEMU_THREAD_JOINABLE);
}
static int pci_edu_init(PCIDevice *pdev)
{
EduState *edu = DO_UPCAST(EduState, pdev, pdev);
uint8_t *pci_conf = pdev->config;
timer_init_ms(&edu->dma_timer, QEMU_CLOCK_VIRTUAL, edu_dma_timer, edu);
qemu_mutex_init(&edu->thr_mutex);
qemu_cond_init(&edu->thr_cond);
qemu_thread_create(&edu->thread, "edu", edu_fact_thread,
edu, QEMU_THREAD_JOINABLE);
pci_config_set_interrupt_pin(pci_conf, 1);
memory_region_init_io(&edu->mmio, OBJECT(edu), &edu_mmio_ops, edu,
"edu-mmio", 1 << 20);
pci_register_bar(pdev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &edu->mmio);
return 0;
}
static void qemu_dummy_start_vcpu(CPUArchState *env)
{
#ifdef CONFIG_S2E
/* Forks inherit parent's memory, therefore we do not want
to allocate new memory regions, just overwrite them. */
if (!s2e_is_forking()) {
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
}
#else
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
#endif
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_dummy_cpu_thread_fn, env,
QEMU_THREAD_JOINABLE);
while (env->created == 0) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
}
static void qemu_tcg_init_vcpu(CPUState *cpu)
{
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
cpu->thread = g_malloc0(sizeof(QemuThread));
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(cpu->halt_cond);
tcg_halt_cond = cpu->halt_cond;
qemu_thread_create(cpu->thread, qemu_tcg_cpu_thread_fn, cpu,
QEMU_THREAD_JOINABLE);
#ifdef _WIN32
cpu->hThread = qemu_thread_get_handle(cpu->thread);
#endif
while (!cpu->created) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
tcg_cpu_thread = cpu->thread;
} else {
cpu->thread = tcg_cpu_thread;
cpu->halt_cond = tcg_halt_cond;
}
}
static int qemu_archipelago_init(BDRVArchipelagoState *s)
{
int ret;
ret = qemu_archipelago_xseg_init(s);
if (ret < 0) {
error_report("Cannot initialize XSEG. Aborting...\n");
goto err_exit;
}
qemu_cond_init(&s->archip_cond);
qemu_mutex_init(&s->archip_mutex);
qemu_cond_init(&s->request_cond);
qemu_mutex_init(&s->request_mutex);
s->th_is_signaled = false;
qemu_thread_create(&s->request_th, "xseg_io_th",
(void *) xseg_request_handler,
(void *) s, QEMU_THREAD_JOINABLE);
err_exit:
return ret;
}
static void qemu_tcg_init_vcpu(void *_env)
{
CPUArchState *env = _env;
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
env->thread = g_malloc0(sizeof(QemuThread));
env->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
tcg_halt_cond = env->halt_cond;
qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env,
QEMU_THREAD_JOINABLE);
#ifdef _WIN32
env->hThread = qemu_thread_get_handle(env->thread);
#endif
while (env->created == 0) {
qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex);
}
tcg_cpu_thread = env->thread;
} else {
env->thread = tcg_cpu_thread;
env->halt_cond = tcg_halt_cond;
}
}
static void enable_emu_timer(uc_engine *uc, uint64_t timeout)
{
uc->timeout = timeout;
qemu_thread_create(uc, &uc->timer, "timeout", _timeout_fn,
uc, QEMU_THREAD_JOINABLE);
}