build-sys: remove unused LIBS
[qemu/ar7.git] / softmmu / runstate.c
blobbeee050815db3dc825ad41e70cd7f987f6ef9712
1 /*
2 * QEMU main system emulation loop
4 * Copyright (c) 2003-2020 QEMU contributors
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
25 #include "qemu/osdep.h"
26 #include "audio/audio.h"
27 #include "block/block.h"
28 #include "chardev/char.h"
29 #include "crypto/cipher.h"
30 #include "crypto/init.h"
31 #include "exec/cpu-common.h"
32 #include "exec/exec-all.h"
33 #include "exec/gdbstub.h"
34 #include "hw/boards.h"
35 #include "migration/misc.h"
36 #include "migration/postcopy-ram.h"
37 #include "monitor/monitor.h"
38 #include "net/net.h"
39 #include "net/vhost_net.h"
40 #include "qapi/error.h"
41 #include "qapi/qapi-commands-run-state.h"
42 #include "qapi/qapi-events-run-state.h"
43 #include "qemu-common.h"
44 #include "qemu/error-report.h"
45 #include "qemu/job.h"
46 #include "qemu/module.h"
47 #include "qemu/plugin.h"
48 #include "qemu/sockets.h"
49 #include "qemu/thread.h"
50 #include "qom/object.h"
51 #include "qom/object_interfaces.h"
52 #include "sysemu/cpus.h"
53 #include "sysemu/qtest.h"
54 #include "sysemu/replay.h"
55 #include "sysemu/reset.h"
56 #include "sysemu/runstate.h"
57 #include "sysemu/runstate-action.h"
58 #include "sysemu/sysemu.h"
59 #include "sysemu/tpm.h"
60 #include "trace.h"
62 static NotifierList exit_notifiers =
63 NOTIFIER_LIST_INITIALIZER(exit_notifiers);
65 static RunState current_run_state = RUN_STATE_PRELAUNCH;
67 /* We use RUN_STATE__MAX but any invalid value will do */
68 static RunState vmstop_requested = RUN_STATE__MAX;
69 static QemuMutex vmstop_lock;
71 typedef struct {
72 RunState from;
73 RunState to;
74 } RunStateTransition;
76 static const RunStateTransition runstate_transitions_def[] = {
77 { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
79 { RUN_STATE_DEBUG, RUN_STATE_RUNNING },
80 { RUN_STATE_DEBUG, RUN_STATE_FINISH_MIGRATE },
81 { RUN_STATE_DEBUG, RUN_STATE_PRELAUNCH },
83 { RUN_STATE_INMIGRATE, RUN_STATE_INTERNAL_ERROR },
84 { RUN_STATE_INMIGRATE, RUN_STATE_IO_ERROR },
85 { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED },
86 { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING },
87 { RUN_STATE_INMIGRATE, RUN_STATE_SHUTDOWN },
88 { RUN_STATE_INMIGRATE, RUN_STATE_SUSPENDED },
89 { RUN_STATE_INMIGRATE, RUN_STATE_WATCHDOG },
90 { RUN_STATE_INMIGRATE, RUN_STATE_GUEST_PANICKED },
91 { RUN_STATE_INMIGRATE, RUN_STATE_FINISH_MIGRATE },
92 { RUN_STATE_INMIGRATE, RUN_STATE_PRELAUNCH },
93 { RUN_STATE_INMIGRATE, RUN_STATE_POSTMIGRATE },
94 { RUN_STATE_INMIGRATE, RUN_STATE_COLO },
96 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED },
97 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE },
98 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PRELAUNCH },
100 { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING },
101 { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE },
102 { RUN_STATE_IO_ERROR, RUN_STATE_PRELAUNCH },
104 { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
105 { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },
106 { RUN_STATE_PAUSED, RUN_STATE_POSTMIGRATE },
107 { RUN_STATE_PAUSED, RUN_STATE_PRELAUNCH },
108 { RUN_STATE_PAUSED, RUN_STATE_COLO},
110 { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING },
111 { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE },
112 { RUN_STATE_POSTMIGRATE, RUN_STATE_PRELAUNCH },
114 { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
115 { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
116 { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
118 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
119 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PAUSED },
120 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },
121 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PRELAUNCH },
122 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_COLO},
124 { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING },
125 { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH },
127 { RUN_STATE_COLO, RUN_STATE_RUNNING },
129 { RUN_STATE_RUNNING, RUN_STATE_DEBUG },
130 { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR },
131 { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR },
132 { RUN_STATE_RUNNING, RUN_STATE_PAUSED },
133 { RUN_STATE_RUNNING, RUN_STATE_FINISH_MIGRATE },
134 { RUN_STATE_RUNNING, RUN_STATE_RESTORE_VM },
135 { RUN_STATE_RUNNING, RUN_STATE_SAVE_VM },
136 { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
137 { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
138 { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED },
139 { RUN_STATE_RUNNING, RUN_STATE_COLO},
141 { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },
143 { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED },
144 { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE },
145 { RUN_STATE_SHUTDOWN, RUN_STATE_PRELAUNCH },
146 { RUN_STATE_SHUTDOWN, RUN_STATE_COLO },
148 { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED },
149 { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED },
150 { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING },
151 { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE },
152 { RUN_STATE_SUSPENDED, RUN_STATE_PRELAUNCH },
153 { RUN_STATE_SUSPENDED, RUN_STATE_COLO},
155 { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING },
156 { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE },
157 { RUN_STATE_WATCHDOG, RUN_STATE_PRELAUNCH },
158 { RUN_STATE_WATCHDOG, RUN_STATE_COLO},
160 { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING },
161 { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE },
162 { RUN_STATE_GUEST_PANICKED, RUN_STATE_PRELAUNCH },
164 { RUN_STATE__MAX, RUN_STATE__MAX },
167 static bool runstate_valid_transitions[RUN_STATE__MAX][RUN_STATE__MAX];
169 bool runstate_check(RunState state)
171 return current_run_state == state;
174 bool runstate_store(char *str, size_t size)
176 const char *state = RunState_str(current_run_state);
177 size_t len = strlen(state) + 1;
179 if (len > size) {
180 return false;
182 memcpy(str, state, len);
183 return true;
186 static void runstate_init(void)
188 const RunStateTransition *p;
190 memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions));
191 for (p = &runstate_transitions_def[0]; p->from != RUN_STATE__MAX; p++) {
192 runstate_valid_transitions[p->from][p->to] = true;
195 qemu_mutex_init(&vmstop_lock);
198 /* This function will abort() on invalid state transitions */
199 void runstate_set(RunState new_state)
201 assert(new_state < RUN_STATE__MAX);
203 trace_runstate_set(current_run_state, RunState_str(current_run_state),
204 new_state, RunState_str(new_state));
206 if (current_run_state == new_state) {
207 return;
210 if (!runstate_valid_transitions[current_run_state][new_state]) {
211 error_report("invalid runstate transition: '%s' -> '%s'",
212 RunState_str(current_run_state),
213 RunState_str(new_state));
214 abort();
217 current_run_state = new_state;
220 int runstate_is_running(void)
222 return runstate_check(RUN_STATE_RUNNING);
225 bool runstate_needs_reset(void)
227 return runstate_check(RUN_STATE_INTERNAL_ERROR) ||
228 runstate_check(RUN_STATE_SHUTDOWN);
231 StatusInfo *qmp_query_status(Error **errp)
233 StatusInfo *info = g_malloc0(sizeof(*info));
235 info->running = runstate_is_running();
236 info->singlestep = singlestep;
237 info->status = current_run_state;
239 return info;
242 bool qemu_vmstop_requested(RunState *r)
244 qemu_mutex_lock(&vmstop_lock);
245 *r = vmstop_requested;
246 vmstop_requested = RUN_STATE__MAX;
247 qemu_mutex_unlock(&vmstop_lock);
248 return *r < RUN_STATE__MAX;
251 void qemu_system_vmstop_request_prepare(void)
253 qemu_mutex_lock(&vmstop_lock);
256 void qemu_system_vmstop_request(RunState state)
258 vmstop_requested = state;
259 qemu_mutex_unlock(&vmstop_lock);
260 qemu_notify_event();
262 struct VMChangeStateEntry {
263 VMChangeStateHandler *cb;
264 void *opaque;
265 QTAILQ_ENTRY(VMChangeStateEntry) entries;
266 int priority;
269 static QTAILQ_HEAD(, VMChangeStateEntry) vm_change_state_head =
270 QTAILQ_HEAD_INITIALIZER(vm_change_state_head);
273 * qemu_add_vm_change_state_handler_prio:
274 * @cb: the callback to invoke
275 * @opaque: user data passed to the callback
276 * @priority: low priorities execute first when the vm runs and the reverse is
277 * true when the vm stops
279 * Register a callback function that is invoked when the vm starts or stops
280 * running.
282 * Returns: an entry to be freed using qemu_del_vm_change_state_handler()
284 VMChangeStateEntry *qemu_add_vm_change_state_handler_prio(
285 VMChangeStateHandler *cb, void *opaque, int priority)
287 VMChangeStateEntry *e;
288 VMChangeStateEntry *other;
290 e = g_malloc0(sizeof(*e));
291 e->cb = cb;
292 e->opaque = opaque;
293 e->priority = priority;
295 /* Keep list sorted in ascending priority order */
296 QTAILQ_FOREACH(other, &vm_change_state_head, entries) {
297 if (priority < other->priority) {
298 QTAILQ_INSERT_BEFORE(other, e, entries);
299 return e;
303 QTAILQ_INSERT_TAIL(&vm_change_state_head, e, entries);
304 return e;
307 VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
308 void *opaque)
310 return qemu_add_vm_change_state_handler_prio(cb, opaque, 0);
313 void qemu_del_vm_change_state_handler(VMChangeStateEntry *e)
315 QTAILQ_REMOVE(&vm_change_state_head, e, entries);
316 g_free(e);
319 void vm_state_notify(int running, RunState state)
321 VMChangeStateEntry *e, *next;
323 trace_vm_state_notify(running, state, RunState_str(state));
325 if (running) {
326 QTAILQ_FOREACH_SAFE(e, &vm_change_state_head, entries, next) {
327 e->cb(e->opaque, running, state);
329 } else {
330 QTAILQ_FOREACH_REVERSE_SAFE(e, &vm_change_state_head, entries, next) {
331 e->cb(e->opaque, running, state);
336 static ShutdownCause reset_requested;
337 static ShutdownCause shutdown_requested;
338 static int shutdown_signal;
339 static pid_t shutdown_pid;
340 static int powerdown_requested;
341 static int debug_requested;
342 static int suspend_requested;
343 static WakeupReason wakeup_reason;
344 static NotifierList powerdown_notifiers =
345 NOTIFIER_LIST_INITIALIZER(powerdown_notifiers);
346 static NotifierList suspend_notifiers =
347 NOTIFIER_LIST_INITIALIZER(suspend_notifiers);
348 static NotifierList wakeup_notifiers =
349 NOTIFIER_LIST_INITIALIZER(wakeup_notifiers);
350 static NotifierList shutdown_notifiers =
351 NOTIFIER_LIST_INITIALIZER(shutdown_notifiers);
352 static uint32_t wakeup_reason_mask = ~(1 << QEMU_WAKEUP_REASON_NONE);
354 ShutdownCause qemu_shutdown_requested_get(void)
356 return shutdown_requested;
359 ShutdownCause qemu_reset_requested_get(void)
361 return reset_requested;
364 static int qemu_shutdown_requested(void)
366 return qatomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE);
369 static void qemu_kill_report(void)
371 if (!qtest_driver() && shutdown_signal) {
372 if (shutdown_pid == 0) {
373 /* This happens for eg ^C at the terminal, so it's worth
374 * avoiding printing an odd message in that case.
376 error_report("terminating on signal %d", shutdown_signal);
377 } else {
378 char *shutdown_cmd = qemu_get_pid_name(shutdown_pid);
380 error_report("terminating on signal %d from pid " FMT_pid " (%s)",
381 shutdown_signal, shutdown_pid,
382 shutdown_cmd ? shutdown_cmd : "<unknown process>");
383 g_free(shutdown_cmd);
385 shutdown_signal = 0;
389 static ShutdownCause qemu_reset_requested(void)
391 ShutdownCause r = reset_requested;
393 if (r && replay_checkpoint(CHECKPOINT_RESET_REQUESTED)) {
394 reset_requested = SHUTDOWN_CAUSE_NONE;
395 return r;
397 return SHUTDOWN_CAUSE_NONE;
400 static int qemu_suspend_requested(void)
402 int r = suspend_requested;
403 if (r && replay_checkpoint(CHECKPOINT_SUSPEND_REQUESTED)) {
404 suspend_requested = 0;
405 return r;
407 return false;
410 static WakeupReason qemu_wakeup_requested(void)
412 return wakeup_reason;
415 static int qemu_powerdown_requested(void)
417 int r = powerdown_requested;
418 powerdown_requested = 0;
419 return r;
422 static int qemu_debug_requested(void)
424 int r = debug_requested;
425 debug_requested = 0;
426 return r;
430 * Reset the VM. Issue an event unless @reason is SHUTDOWN_CAUSE_NONE.
432 void qemu_system_reset(ShutdownCause reason)
434 MachineClass *mc;
436 mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL;
438 cpu_synchronize_all_states();
440 if (mc && mc->reset) {
441 mc->reset(current_machine);
442 } else {
443 qemu_devices_reset();
445 if (reason && reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) {
446 qapi_event_send_reset(shutdown_caused_by_guest(reason), reason);
448 cpu_synchronize_all_post_reset();
452 * Wake the VM after suspend.
454 static void qemu_system_wakeup(void)
456 MachineClass *mc;
458 mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL;
460 if (mc && mc->wakeup) {
461 mc->wakeup(current_machine);
465 void qemu_system_guest_panicked(GuestPanicInformation *info)
467 qemu_log_mask(LOG_GUEST_ERROR, "Guest crashed");
469 if (current_cpu) {
470 current_cpu->crash_occurred = true;
473 * TODO: Currently the available panic actions are: none, pause, and
474 * shutdown, but in principle debug and reset could be supported as well.
475 * Investigate any potential use cases for the unimplemented actions.
477 if (panic_action == PANIC_ACTION_PAUSE
478 || (panic_action == PANIC_ACTION_SHUTDOWN && shutdown_action == SHUTDOWN_ACTION_PAUSE)) {
479 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
480 !!info, info);
481 vm_stop(RUN_STATE_GUEST_PANICKED);
482 } else if (panic_action == PANIC_ACTION_SHUTDOWN) {
483 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF,
484 !!info, info);
485 vm_stop(RUN_STATE_GUEST_PANICKED);
486 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC);
487 } else {
488 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_RUN,
489 !!info, info);
492 if (info) {
493 if (info->type == GUEST_PANIC_INFORMATION_TYPE_HYPER_V) {
494 qemu_log_mask(LOG_GUEST_ERROR, "\nHV crash parameters: (%#"PRIx64
495 " %#"PRIx64" %#"PRIx64" %#"PRIx64" %#"PRIx64")\n",
496 info->u.hyper_v.arg1,
497 info->u.hyper_v.arg2,
498 info->u.hyper_v.arg3,
499 info->u.hyper_v.arg4,
500 info->u.hyper_v.arg5);
501 } else if (info->type == GUEST_PANIC_INFORMATION_TYPE_S390) {
502 qemu_log_mask(LOG_GUEST_ERROR, " on cpu %d: %s\n"
503 "PSW: 0x%016" PRIx64 " 0x%016" PRIx64"\n",
504 info->u.s390.core,
505 S390CrashReason_str(info->u.s390.reason),
506 info->u.s390.psw_mask,
507 info->u.s390.psw_addr);
509 qapi_free_GuestPanicInformation(info);
513 void qemu_system_guest_crashloaded(GuestPanicInformation *info)
515 qemu_log_mask(LOG_GUEST_ERROR, "Guest crash loaded");
517 qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN,
518 !!info, info);
520 if (info) {
521 qapi_free_GuestPanicInformation(info);
525 void qemu_system_reset_request(ShutdownCause reason)
527 if (reboot_action == REBOOT_ACTION_SHUTDOWN &&
528 reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) {
529 shutdown_requested = reason;
530 } else {
531 reset_requested = reason;
533 cpu_stop_current();
534 qemu_notify_event();
537 static void qemu_system_suspend(void)
539 pause_all_vcpus();
540 notifier_list_notify(&suspend_notifiers, NULL);
541 runstate_set(RUN_STATE_SUSPENDED);
542 qapi_event_send_suspend();
545 void qemu_system_suspend_request(void)
547 if (runstate_check(RUN_STATE_SUSPENDED)) {
548 return;
550 suspend_requested = 1;
551 cpu_stop_current();
552 qemu_notify_event();
555 void qemu_register_suspend_notifier(Notifier *notifier)
557 notifier_list_add(&suspend_notifiers, notifier);
560 void qemu_system_wakeup_request(WakeupReason reason, Error **errp)
562 trace_system_wakeup_request(reason);
564 if (!runstate_check(RUN_STATE_SUSPENDED)) {
565 error_setg(errp,
566 "Unable to wake up: guest is not in suspended state");
567 return;
569 if (!(wakeup_reason_mask & (1 << reason))) {
570 return;
572 runstate_set(RUN_STATE_RUNNING);
573 wakeup_reason = reason;
574 qemu_notify_event();
577 void qemu_system_wakeup_enable(WakeupReason reason, bool enabled)
579 if (enabled) {
580 wakeup_reason_mask |= (1 << reason);
581 } else {
582 wakeup_reason_mask &= ~(1 << reason);
586 void qemu_register_wakeup_notifier(Notifier *notifier)
588 notifier_list_add(&wakeup_notifiers, notifier);
591 static bool wakeup_suspend_enabled;
593 void qemu_register_wakeup_support(void)
595 wakeup_suspend_enabled = true;
598 bool qemu_wakeup_suspend_enabled(void)
600 return wakeup_suspend_enabled;
603 void qemu_system_killed(int signal, pid_t pid)
605 shutdown_signal = signal;
606 shutdown_pid = pid;
607 shutdown_action = SHUTDOWN_ACTION_POWEROFF;
609 /* Cannot call qemu_system_shutdown_request directly because
610 * we are in a signal handler.
612 shutdown_requested = SHUTDOWN_CAUSE_HOST_SIGNAL;
613 qemu_notify_event();
616 void qemu_system_shutdown_request(ShutdownCause reason)
618 trace_qemu_system_shutdown_request(reason);
619 replay_shutdown_request(reason);
620 shutdown_requested = reason;
621 qemu_notify_event();
624 static void qemu_system_powerdown(void)
626 qapi_event_send_powerdown();
627 notifier_list_notify(&powerdown_notifiers, NULL);
630 static void qemu_system_shutdown(ShutdownCause cause)
632 qapi_event_send_shutdown(shutdown_caused_by_guest(cause), cause);
633 notifier_list_notify(&shutdown_notifiers, &cause);
636 void qemu_system_powerdown_request(void)
638 trace_qemu_system_powerdown_request();
639 powerdown_requested = 1;
640 qemu_notify_event();
643 void qemu_register_powerdown_notifier(Notifier *notifier)
645 notifier_list_add(&powerdown_notifiers, notifier);
648 void qemu_register_shutdown_notifier(Notifier *notifier)
650 notifier_list_add(&shutdown_notifiers, notifier);
653 void qemu_system_debug_request(void)
655 debug_requested = 1;
656 qemu_notify_event();
659 static bool main_loop_should_exit(void)
661 RunState r;
662 ShutdownCause request;
664 if (qemu_debug_requested()) {
665 vm_stop(RUN_STATE_DEBUG);
667 if (qemu_suspend_requested()) {
668 qemu_system_suspend();
670 request = qemu_shutdown_requested();
671 if (request) {
672 qemu_kill_report();
673 qemu_system_shutdown(request);
674 if (shutdown_action == SHUTDOWN_ACTION_PAUSE) {
675 vm_stop(RUN_STATE_SHUTDOWN);
676 } else {
677 return true;
680 request = qemu_reset_requested();
681 if (request) {
682 pause_all_vcpus();
683 qemu_system_reset(request);
684 resume_all_vcpus();
686 * runstate can change in pause_all_vcpus()
687 * as iothread mutex is unlocked
689 if (!runstate_check(RUN_STATE_RUNNING) &&
690 !runstate_check(RUN_STATE_INMIGRATE) &&
691 !runstate_check(RUN_STATE_FINISH_MIGRATE)) {
692 runstate_set(RUN_STATE_PRELAUNCH);
695 if (qemu_wakeup_requested()) {
696 pause_all_vcpus();
697 qemu_system_wakeup();
698 notifier_list_notify(&wakeup_notifiers, &wakeup_reason);
699 wakeup_reason = QEMU_WAKEUP_REASON_NONE;
700 resume_all_vcpus();
701 qapi_event_send_wakeup();
703 if (qemu_powerdown_requested()) {
704 qemu_system_powerdown();
706 if (qemu_vmstop_requested(&r)) {
707 vm_stop(r);
709 return false;
712 void qemu_main_loop(void)
714 #ifdef CONFIG_PROFILER
715 int64_t ti;
716 #endif
717 while (!main_loop_should_exit()) {
718 #ifdef CONFIG_PROFILER
719 ti = profile_getclock();
720 #endif
721 main_loop_wait(false);
722 #ifdef CONFIG_PROFILER
723 dev_time += profile_getclock() - ti;
724 #endif
728 void qemu_add_exit_notifier(Notifier *notify)
730 notifier_list_add(&exit_notifiers, notify);
733 void qemu_remove_exit_notifier(Notifier *notify)
735 notifier_remove(notify);
738 static void qemu_run_exit_notifiers(void)
740 notifier_list_notify(&exit_notifiers, NULL);
743 void qemu_init_subsystems(void)
745 Error *err;
747 os_set_line_buffering();
749 module_call_init(MODULE_INIT_TRACE);
751 qemu_init_cpu_list();
752 qemu_init_cpu_loop();
753 qemu_mutex_lock_iothread();
755 atexit(qemu_run_exit_notifiers);
757 module_call_init(MODULE_INIT_QOM);
758 module_call_init(MODULE_INIT_MIGRATION);
760 runstate_init();
761 precopy_infrastructure_init();
762 postcopy_infrastructure_init();
763 monitor_init_globals();
765 if (qcrypto_init(&err) < 0) {
766 error_reportf_err(err, "cannot initialize crypto: ");
767 exit(1);
770 os_setup_early_signal_handling();
772 bdrv_init_with_whitelist();
773 socket_init();
777 void qemu_cleanup(void)
779 gdb_exit(0);
782 * cleaning up the migration object cancels any existing migration
783 * try to do this early so that it also stops using devices.
785 migration_shutdown();
788 * We must cancel all block jobs while the block layer is drained,
789 * or cancelling will be affected by throttling and thus may block
790 * for an extended period of time.
791 * vm_shutdown() will bdrv_drain_all(), so we may as well include
792 * it in the drained section.
793 * We do not need to end this section, because we do not want any
794 * requests happening from here on anyway.
796 bdrv_drain_all_begin();
798 /* No more vcpu or device emulation activity beyond this point */
799 vm_shutdown();
800 replay_finish();
802 job_cancel_sync_all();
803 bdrv_close_all();
805 /* vhost-user must be cleaned up before chardevs. */
806 tpm_cleanup();
807 net_cleanup();
808 audio_cleanup();
809 monitor_cleanup();
810 qemu_chr_cleanup();
811 user_creatable_cleanup();
812 /* TODO: unref root container, check all devices are ok */