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
25 #include "qemu/osdep.h"
26 #include "audio/audio.h"
27 #include "block/block.h"
28 #include "block/export.h"
29 #include "chardev/char.h"
30 #include "crypto/cipher.h"
31 #include "crypto/init.h"
32 #include "exec/cpu-common.h"
33 #include "gdbstub/syscalls.h"
34 #include "hw/boards.h"
35 #include "migration/misc.h"
36 #include "migration/postcopy-ram.h"
37 #include "monitor/monitor.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/accel.h"
44 #include "qemu/error-report.h"
47 #include "qemu/module.h"
48 #include "qemu/plugin.h"
49 #include "qemu/sockets.h"
50 #include "qemu/timer.h"
51 #include "qemu/thread.h"
52 #include "qom/object.h"
53 #include "qom/object_interfaces.h"
54 #include "sysemu/cpus.h"
55 #include "sysemu/qtest.h"
56 #include "sysemu/replay.h"
57 #include "sysemu/reset.h"
58 #include "sysemu/runstate.h"
59 #include "sysemu/runstate-action.h"
60 #include "sysemu/sysemu.h"
61 #include "sysemu/tpm.h"
64 static NotifierList exit_notifiers
=
65 NOTIFIER_LIST_INITIALIZER(exit_notifiers
);
67 static RunState current_run_state
= RUN_STATE_PRELAUNCH
;
69 /* We use RUN_STATE__MAX but any invalid value will do */
70 static RunState vmstop_requested
= RUN_STATE__MAX
;
71 static QemuMutex vmstop_lock
;
78 static const RunStateTransition runstate_transitions_def
[] = {
79 { RUN_STATE_PRELAUNCH
, RUN_STATE_INMIGRATE
},
81 { RUN_STATE_DEBUG
, RUN_STATE_RUNNING
},
82 { RUN_STATE_DEBUG
, RUN_STATE_FINISH_MIGRATE
},
83 { RUN_STATE_DEBUG
, RUN_STATE_PRELAUNCH
},
85 { RUN_STATE_INMIGRATE
, RUN_STATE_INTERNAL_ERROR
},
86 { RUN_STATE_INMIGRATE
, RUN_STATE_IO_ERROR
},
87 { RUN_STATE_INMIGRATE
, RUN_STATE_PAUSED
},
88 { RUN_STATE_INMIGRATE
, RUN_STATE_RUNNING
},
89 { RUN_STATE_INMIGRATE
, RUN_STATE_SHUTDOWN
},
90 { RUN_STATE_INMIGRATE
, RUN_STATE_SUSPENDED
},
91 { RUN_STATE_INMIGRATE
, RUN_STATE_WATCHDOG
},
92 { RUN_STATE_INMIGRATE
, RUN_STATE_GUEST_PANICKED
},
93 { RUN_STATE_INMIGRATE
, RUN_STATE_FINISH_MIGRATE
},
94 { RUN_STATE_INMIGRATE
, RUN_STATE_PRELAUNCH
},
95 { RUN_STATE_INMIGRATE
, RUN_STATE_POSTMIGRATE
},
96 { RUN_STATE_INMIGRATE
, RUN_STATE_COLO
},
98 { RUN_STATE_INTERNAL_ERROR
, RUN_STATE_PAUSED
},
99 { RUN_STATE_INTERNAL_ERROR
, RUN_STATE_FINISH_MIGRATE
},
100 { RUN_STATE_INTERNAL_ERROR
, RUN_STATE_PRELAUNCH
},
102 { RUN_STATE_IO_ERROR
, RUN_STATE_RUNNING
},
103 { RUN_STATE_IO_ERROR
, RUN_STATE_FINISH_MIGRATE
},
104 { RUN_STATE_IO_ERROR
, RUN_STATE_PRELAUNCH
},
106 { RUN_STATE_PAUSED
, RUN_STATE_RUNNING
},
107 { RUN_STATE_PAUSED
, RUN_STATE_FINISH_MIGRATE
},
108 { RUN_STATE_PAUSED
, RUN_STATE_POSTMIGRATE
},
109 { RUN_STATE_PAUSED
, RUN_STATE_PRELAUNCH
},
110 { RUN_STATE_PAUSED
, RUN_STATE_COLO
},
112 { RUN_STATE_POSTMIGRATE
, RUN_STATE_RUNNING
},
113 { RUN_STATE_POSTMIGRATE
, RUN_STATE_FINISH_MIGRATE
},
114 { RUN_STATE_POSTMIGRATE
, RUN_STATE_PRELAUNCH
},
116 { RUN_STATE_PRELAUNCH
, RUN_STATE_RUNNING
},
117 { RUN_STATE_PRELAUNCH
, RUN_STATE_FINISH_MIGRATE
},
118 { RUN_STATE_PRELAUNCH
, RUN_STATE_INMIGRATE
},
120 { RUN_STATE_FINISH_MIGRATE
, RUN_STATE_RUNNING
},
121 { RUN_STATE_FINISH_MIGRATE
, RUN_STATE_PAUSED
},
122 { RUN_STATE_FINISH_MIGRATE
, RUN_STATE_POSTMIGRATE
},
123 { RUN_STATE_FINISH_MIGRATE
, RUN_STATE_PRELAUNCH
},
124 { RUN_STATE_FINISH_MIGRATE
, RUN_STATE_COLO
},
126 { RUN_STATE_RESTORE_VM
, RUN_STATE_RUNNING
},
127 { RUN_STATE_RESTORE_VM
, RUN_STATE_PRELAUNCH
},
129 { RUN_STATE_COLO
, RUN_STATE_RUNNING
},
130 { RUN_STATE_COLO
, RUN_STATE_PRELAUNCH
},
131 { RUN_STATE_COLO
, RUN_STATE_SHUTDOWN
},
133 { RUN_STATE_RUNNING
, RUN_STATE_DEBUG
},
134 { RUN_STATE_RUNNING
, RUN_STATE_INTERNAL_ERROR
},
135 { RUN_STATE_RUNNING
, RUN_STATE_IO_ERROR
},
136 { RUN_STATE_RUNNING
, RUN_STATE_PAUSED
},
137 { RUN_STATE_RUNNING
, RUN_STATE_FINISH_MIGRATE
},
138 { RUN_STATE_RUNNING
, RUN_STATE_RESTORE_VM
},
139 { RUN_STATE_RUNNING
, RUN_STATE_SAVE_VM
},
140 { RUN_STATE_RUNNING
, RUN_STATE_SHUTDOWN
},
141 { RUN_STATE_RUNNING
, RUN_STATE_WATCHDOG
},
142 { RUN_STATE_RUNNING
, RUN_STATE_GUEST_PANICKED
},
143 { RUN_STATE_RUNNING
, RUN_STATE_COLO
},
145 { RUN_STATE_SAVE_VM
, RUN_STATE_RUNNING
},
147 { RUN_STATE_SHUTDOWN
, RUN_STATE_PAUSED
},
148 { RUN_STATE_SHUTDOWN
, RUN_STATE_FINISH_MIGRATE
},
149 { RUN_STATE_SHUTDOWN
, RUN_STATE_PRELAUNCH
},
150 { RUN_STATE_SHUTDOWN
, RUN_STATE_COLO
},
152 { RUN_STATE_DEBUG
, RUN_STATE_SUSPENDED
},
153 { RUN_STATE_RUNNING
, RUN_STATE_SUSPENDED
},
154 { RUN_STATE_SUSPENDED
, RUN_STATE_RUNNING
},
155 { RUN_STATE_SUSPENDED
, RUN_STATE_FINISH_MIGRATE
},
156 { RUN_STATE_SUSPENDED
, RUN_STATE_PRELAUNCH
},
157 { RUN_STATE_SUSPENDED
, RUN_STATE_COLO
},
159 { RUN_STATE_WATCHDOG
, RUN_STATE_RUNNING
},
160 { RUN_STATE_WATCHDOG
, RUN_STATE_FINISH_MIGRATE
},
161 { RUN_STATE_WATCHDOG
, RUN_STATE_PRELAUNCH
},
162 { RUN_STATE_WATCHDOG
, RUN_STATE_COLO
},
164 { RUN_STATE_GUEST_PANICKED
, RUN_STATE_RUNNING
},
165 { RUN_STATE_GUEST_PANICKED
, RUN_STATE_FINISH_MIGRATE
},
166 { RUN_STATE_GUEST_PANICKED
, RUN_STATE_PRELAUNCH
},
168 { RUN_STATE__MAX
, RUN_STATE__MAX
},
171 static bool runstate_valid_transitions
[RUN_STATE__MAX
][RUN_STATE__MAX
];
173 bool runstate_check(RunState state
)
175 return current_run_state
== state
;
178 bool runstate_store(char *str
, size_t size
)
180 const char *state
= RunState_str(current_run_state
);
181 size_t len
= strlen(state
) + 1;
186 memcpy(str
, state
, len
);
190 static void runstate_init(void)
192 const RunStateTransition
*p
;
194 memset(&runstate_valid_transitions
, 0, sizeof(runstate_valid_transitions
));
195 for (p
= &runstate_transitions_def
[0]; p
->from
!= RUN_STATE__MAX
; p
++) {
196 runstate_valid_transitions
[p
->from
][p
->to
] = true;
199 qemu_mutex_init(&vmstop_lock
);
202 /* This function will abort() on invalid state transitions */
203 void runstate_set(RunState new_state
)
205 assert(new_state
< RUN_STATE__MAX
);
207 trace_runstate_set(current_run_state
, RunState_str(current_run_state
),
208 new_state
, RunState_str(new_state
));
210 if (current_run_state
== new_state
) {
214 if (!runstate_valid_transitions
[current_run_state
][new_state
]) {
215 error_report("invalid runstate transition: '%s' -> '%s'",
216 RunState_str(current_run_state
),
217 RunState_str(new_state
));
221 current_run_state
= new_state
;
224 bool runstate_is_running(void)
226 return runstate_check(RUN_STATE_RUNNING
);
229 bool runstate_needs_reset(void)
231 return runstate_check(RUN_STATE_INTERNAL_ERROR
) ||
232 runstate_check(RUN_STATE_SHUTDOWN
);
235 StatusInfo
*qmp_query_status(Error
**errp
)
237 StatusInfo
*info
= g_malloc0(sizeof(*info
));
238 AccelState
*accel
= current_accel();
241 * We ignore errors, which will happen if the accelerator
242 * is not TCG. "singlestep" is meaningless for other accelerators,
243 * so we will set the StatusInfo field to false for those.
245 info
->singlestep
= object_property_get_bool(OBJECT(accel
),
246 "one-insn-per-tb", NULL
);
247 info
->running
= runstate_is_running();
248 info
->status
= current_run_state
;
253 bool qemu_vmstop_requested(RunState
*r
)
255 qemu_mutex_lock(&vmstop_lock
);
256 *r
= vmstop_requested
;
257 vmstop_requested
= RUN_STATE__MAX
;
258 qemu_mutex_unlock(&vmstop_lock
);
259 return *r
< RUN_STATE__MAX
;
262 void qemu_system_vmstop_request_prepare(void)
264 qemu_mutex_lock(&vmstop_lock
);
267 void qemu_system_vmstop_request(RunState state
)
269 vmstop_requested
= state
;
270 qemu_mutex_unlock(&vmstop_lock
);
273 struct VMChangeStateEntry
{
274 VMChangeStateHandler
*cb
;
276 QTAILQ_ENTRY(VMChangeStateEntry
) entries
;
280 static QTAILQ_HEAD(, VMChangeStateEntry
) vm_change_state_head
=
281 QTAILQ_HEAD_INITIALIZER(vm_change_state_head
);
284 * qemu_add_vm_change_state_handler_prio:
285 * @cb: the callback to invoke
286 * @opaque: user data passed to the callback
287 * @priority: low priorities execute first when the vm runs and the reverse is
288 * true when the vm stops
290 * Register a callback function that is invoked when the vm starts or stops
293 * Returns: an entry to be freed using qemu_del_vm_change_state_handler()
295 VMChangeStateEntry
*qemu_add_vm_change_state_handler_prio(
296 VMChangeStateHandler
*cb
, void *opaque
, int priority
)
298 VMChangeStateEntry
*e
;
299 VMChangeStateEntry
*other
;
301 e
= g_malloc0(sizeof(*e
));
304 e
->priority
= priority
;
306 /* Keep list sorted in ascending priority order */
307 QTAILQ_FOREACH(other
, &vm_change_state_head
, entries
) {
308 if (priority
< other
->priority
) {
309 QTAILQ_INSERT_BEFORE(other
, e
, entries
);
314 QTAILQ_INSERT_TAIL(&vm_change_state_head
, e
, entries
);
318 VMChangeStateEntry
*qemu_add_vm_change_state_handler(VMChangeStateHandler
*cb
,
321 return qemu_add_vm_change_state_handler_prio(cb
, opaque
, 0);
324 void qemu_del_vm_change_state_handler(VMChangeStateEntry
*e
)
326 QTAILQ_REMOVE(&vm_change_state_head
, e
, entries
);
330 void vm_state_notify(bool running
, RunState state
)
332 VMChangeStateEntry
*e
, *next
;
334 trace_vm_state_notify(running
, state
, RunState_str(state
));
337 QTAILQ_FOREACH_SAFE(e
, &vm_change_state_head
, entries
, next
) {
338 e
->cb(e
->opaque
, running
, state
);
341 QTAILQ_FOREACH_REVERSE_SAFE(e
, &vm_change_state_head
, entries
, next
) {
342 e
->cb(e
->opaque
, running
, state
);
347 static ShutdownCause reset_requested
;
348 static ShutdownCause shutdown_requested
;
349 static int shutdown_signal
;
350 static pid_t shutdown_pid
;
351 static int powerdown_requested
;
352 static int debug_requested
;
353 static int suspend_requested
;
354 static WakeupReason wakeup_reason
;
355 static NotifierList powerdown_notifiers
=
356 NOTIFIER_LIST_INITIALIZER(powerdown_notifiers
);
357 static NotifierList suspend_notifiers
=
358 NOTIFIER_LIST_INITIALIZER(suspend_notifiers
);
359 static NotifierList wakeup_notifiers
=
360 NOTIFIER_LIST_INITIALIZER(wakeup_notifiers
);
361 static NotifierList shutdown_notifiers
=
362 NOTIFIER_LIST_INITIALIZER(shutdown_notifiers
);
363 static uint32_t wakeup_reason_mask
= ~(1 << QEMU_WAKEUP_REASON_NONE
);
365 ShutdownCause
qemu_shutdown_requested_get(void)
367 return shutdown_requested
;
370 ShutdownCause
qemu_reset_requested_get(void)
372 return reset_requested
;
375 static int qemu_shutdown_requested(void)
377 return qatomic_xchg(&shutdown_requested
, SHUTDOWN_CAUSE_NONE
);
380 static void qemu_kill_report(void)
382 if (!qtest_driver() && shutdown_signal
) {
383 if (shutdown_pid
== 0) {
384 /* This happens for eg ^C at the terminal, so it's worth
385 * avoiding printing an odd message in that case.
387 error_report("terminating on signal %d", shutdown_signal
);
389 char *shutdown_cmd
= qemu_get_pid_name(shutdown_pid
);
391 error_report("terminating on signal %d from pid " FMT_pid
" (%s)",
392 shutdown_signal
, shutdown_pid
,
393 shutdown_cmd
? shutdown_cmd
: "<unknown process>");
394 g_free(shutdown_cmd
);
400 static ShutdownCause
qemu_reset_requested(void)
402 ShutdownCause r
= reset_requested
;
404 if (r
&& replay_checkpoint(CHECKPOINT_RESET_REQUESTED
)) {
405 reset_requested
= SHUTDOWN_CAUSE_NONE
;
408 return SHUTDOWN_CAUSE_NONE
;
411 static int qemu_suspend_requested(void)
413 int r
= suspend_requested
;
414 if (r
&& replay_checkpoint(CHECKPOINT_SUSPEND_REQUESTED
)) {
415 suspend_requested
= 0;
421 static WakeupReason
qemu_wakeup_requested(void)
423 return wakeup_reason
;
426 static int qemu_powerdown_requested(void)
428 int r
= powerdown_requested
;
429 powerdown_requested
= 0;
433 static int qemu_debug_requested(void)
435 int r
= debug_requested
;
441 * Reset the VM. Issue an event unless @reason is SHUTDOWN_CAUSE_NONE.
443 void qemu_system_reset(ShutdownCause reason
)
447 mc
= current_machine
? MACHINE_GET_CLASS(current_machine
) : NULL
;
449 cpu_synchronize_all_states();
451 if (mc
&& mc
->reset
) {
452 mc
->reset(current_machine
, reason
);
454 qemu_devices_reset(reason
);
457 case SHUTDOWN_CAUSE_NONE
:
458 case SHUTDOWN_CAUSE_SUBSYSTEM_RESET
:
459 case SHUTDOWN_CAUSE_SNAPSHOT_LOAD
:
462 qapi_event_send_reset(shutdown_caused_by_guest(reason
), reason
);
464 cpu_synchronize_all_post_reset();
468 * Wake the VM after suspend.
470 static void qemu_system_wakeup(void)
474 mc
= current_machine
? MACHINE_GET_CLASS(current_machine
) : NULL
;
476 if (mc
&& mc
->wakeup
) {
477 mc
->wakeup(current_machine
);
481 void qemu_system_guest_panicked(GuestPanicInformation
*info
)
483 qemu_log_mask(LOG_GUEST_ERROR
, "Guest crashed");
486 current_cpu
->crash_occurred
= true;
489 * TODO: Currently the available panic actions are: none, pause, and
490 * shutdown, but in principle debug and reset could be supported as well.
491 * Investigate any potential use cases for the unimplemented actions.
493 if (panic_action
== PANIC_ACTION_PAUSE
494 || (panic_action
== PANIC_ACTION_SHUTDOWN
&& shutdown_action
== SHUTDOWN_ACTION_PAUSE
)) {
495 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE
, info
);
496 vm_stop(RUN_STATE_GUEST_PANICKED
);
497 } else if (panic_action
== PANIC_ACTION_SHUTDOWN
||
498 panic_action
== PANIC_ACTION_EXIT_FAILURE
) {
499 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF
, info
);
500 vm_stop(RUN_STATE_GUEST_PANICKED
);
501 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC
);
503 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_RUN
, info
);
507 if (info
->type
== GUEST_PANIC_INFORMATION_TYPE_HYPER_V
) {
508 qemu_log_mask(LOG_GUEST_ERROR
, "\nHV crash parameters: (%#"PRIx64
509 " %#"PRIx64
" %#"PRIx64
" %#"PRIx64
" %#"PRIx64
")\n",
510 info
->u
.hyper_v
.arg1
,
511 info
->u
.hyper_v
.arg2
,
512 info
->u
.hyper_v
.arg3
,
513 info
->u
.hyper_v
.arg4
,
514 info
->u
.hyper_v
.arg5
);
515 } else if (info
->type
== GUEST_PANIC_INFORMATION_TYPE_S390
) {
516 qemu_log_mask(LOG_GUEST_ERROR
, " on cpu %d: %s\n"
517 "PSW: 0x%016" PRIx64
" 0x%016" PRIx64
"\n",
519 S390CrashReason_str(info
->u
.s390
.reason
),
520 info
->u
.s390
.psw_mask
,
521 info
->u
.s390
.psw_addr
);
523 qapi_free_GuestPanicInformation(info
);
527 void qemu_system_guest_crashloaded(GuestPanicInformation
*info
)
529 qemu_log_mask(LOG_GUEST_ERROR
, "Guest crash loaded");
530 qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN
, info
);
531 qapi_free_GuestPanicInformation(info
);
534 void qemu_system_reset_request(ShutdownCause reason
)
536 if (reboot_action
== REBOOT_ACTION_SHUTDOWN
&&
537 reason
!= SHUTDOWN_CAUSE_SUBSYSTEM_RESET
) {
538 shutdown_requested
= reason
;
539 } else if (!cpus_are_resettable()) {
540 error_report("cpus are not resettable, terminating");
541 shutdown_requested
= reason
;
543 reset_requested
= reason
;
549 static void qemu_system_suspend(void)
552 notifier_list_notify(&suspend_notifiers
, NULL
);
553 runstate_set(RUN_STATE_SUSPENDED
);
554 qapi_event_send_suspend();
557 void qemu_system_suspend_request(void)
559 if (runstate_check(RUN_STATE_SUSPENDED
)) {
562 suspend_requested
= 1;
567 void qemu_register_suspend_notifier(Notifier
*notifier
)
569 notifier_list_add(&suspend_notifiers
, notifier
);
572 void qemu_system_wakeup_request(WakeupReason reason
, Error
**errp
)
574 trace_system_wakeup_request(reason
);
576 if (!runstate_check(RUN_STATE_SUSPENDED
)) {
578 "Unable to wake up: guest is not in suspended state");
581 if (!(wakeup_reason_mask
& (1 << reason
))) {
584 runstate_set(RUN_STATE_RUNNING
);
585 wakeup_reason
= reason
;
589 void qemu_system_wakeup_enable(WakeupReason reason
, bool enabled
)
592 wakeup_reason_mask
|= (1 << reason
);
594 wakeup_reason_mask
&= ~(1 << reason
);
598 void qemu_register_wakeup_notifier(Notifier
*notifier
)
600 notifier_list_add(&wakeup_notifiers
, notifier
);
603 static bool wakeup_suspend_enabled
;
605 void qemu_register_wakeup_support(void)
607 wakeup_suspend_enabled
= true;
610 bool qemu_wakeup_suspend_enabled(void)
612 return wakeup_suspend_enabled
;
615 void qemu_system_killed(int signal
, pid_t pid
)
617 shutdown_signal
= signal
;
619 shutdown_action
= SHUTDOWN_ACTION_POWEROFF
;
621 /* Cannot call qemu_system_shutdown_request directly because
622 * we are in a signal handler.
624 shutdown_requested
= SHUTDOWN_CAUSE_HOST_SIGNAL
;
628 void qemu_system_shutdown_request(ShutdownCause reason
)
630 trace_qemu_system_shutdown_request(reason
);
631 replay_shutdown_request(reason
);
632 shutdown_requested
= reason
;
636 static void qemu_system_powerdown(void)
638 qapi_event_send_powerdown();
639 notifier_list_notify(&powerdown_notifiers
, NULL
);
642 static void qemu_system_shutdown(ShutdownCause cause
)
644 qapi_event_send_shutdown(shutdown_caused_by_guest(cause
), cause
);
645 notifier_list_notify(&shutdown_notifiers
, &cause
);
648 void qemu_system_powerdown_request(void)
650 trace_qemu_system_powerdown_request();
651 powerdown_requested
= 1;
655 void qemu_register_powerdown_notifier(Notifier
*notifier
)
657 notifier_list_add(&powerdown_notifiers
, notifier
);
660 void qemu_register_shutdown_notifier(Notifier
*notifier
)
662 notifier_list_add(&shutdown_notifiers
, notifier
);
665 void qemu_system_debug_request(void)
671 static bool main_loop_should_exit(int *status
)
674 ShutdownCause request
;
676 if (qemu_debug_requested()) {
677 vm_stop(RUN_STATE_DEBUG
);
679 if (qemu_suspend_requested()) {
680 qemu_system_suspend();
682 request
= qemu_shutdown_requested();
685 qemu_system_shutdown(request
);
686 if (shutdown_action
== SHUTDOWN_ACTION_PAUSE
) {
687 vm_stop(RUN_STATE_SHUTDOWN
);
689 if (request
== SHUTDOWN_CAUSE_GUEST_PANIC
&&
690 panic_action
== PANIC_ACTION_EXIT_FAILURE
) {
691 *status
= EXIT_FAILURE
;
696 request
= qemu_reset_requested();
699 qemu_system_reset(request
);
702 * runstate can change in pause_all_vcpus()
703 * as iothread mutex is unlocked
705 if (!runstate_check(RUN_STATE_RUNNING
) &&
706 !runstate_check(RUN_STATE_INMIGRATE
) &&
707 !runstate_check(RUN_STATE_FINISH_MIGRATE
)) {
708 runstate_set(RUN_STATE_PRELAUNCH
);
711 if (qemu_wakeup_requested()) {
713 qemu_system_wakeup();
714 notifier_list_notify(&wakeup_notifiers
, &wakeup_reason
);
715 wakeup_reason
= QEMU_WAKEUP_REASON_NONE
;
717 qapi_event_send_wakeup();
719 if (qemu_powerdown_requested()) {
720 qemu_system_powerdown();
722 if (qemu_vmstop_requested(&r
)) {
728 int qemu_main_loop(void)
730 int status
= EXIT_SUCCESS
;
731 #ifdef CONFIG_PROFILER
735 while (!main_loop_should_exit(&status
)) {
736 #ifdef CONFIG_PROFILER
737 ti
= profile_getclock();
739 main_loop_wait(false);
740 #ifdef CONFIG_PROFILER
741 dev_time
+= profile_getclock() - ti
;
748 void qemu_add_exit_notifier(Notifier
*notify
)
750 notifier_list_add(&exit_notifiers
, notify
);
753 void qemu_remove_exit_notifier(Notifier
*notify
)
755 notifier_remove(notify
);
758 static void qemu_run_exit_notifiers(void)
760 notifier_list_notify(&exit_notifiers
, NULL
);
763 void qemu_init_subsystems(void)
767 os_set_line_buffering();
769 module_call_init(MODULE_INIT_TRACE
);
771 qemu_init_cpu_list();
772 qemu_init_cpu_loop();
773 qemu_mutex_lock_iothread();
775 atexit(qemu_run_exit_notifiers
);
777 module_call_init(MODULE_INIT_QOM
);
778 module_call_init(MODULE_INIT_MIGRATION
);
781 precopy_infrastructure_init();
782 postcopy_infrastructure_init();
783 monitor_init_globals();
785 if (qcrypto_init(&err
) < 0) {
786 error_reportf_err(err
, "cannot initialize crypto: ");
790 os_setup_early_signal_handling();
792 bdrv_init_with_whitelist();
797 void qemu_cleanup(void)
802 * cleaning up the migration object cancels any existing migration
803 * try to do this early so that it also stops using devices.
805 migration_shutdown();
808 * Close the exports before draining the block layer. The export
809 * drivers may have coroutines yielding on it, so we need to clean
810 * them up before the drain, as otherwise they may be get stuck in
811 * blk_wait_while_drained().
816 * We must cancel all block jobs while the block layer is drained,
817 * or cancelling will be affected by throttling and thus may block
818 * for an extended period of time.
819 * vm_shutdown() will bdrv_drain_all(), so we may as well include
820 * it in the drained section.
821 * We do not need to end this section, because we do not want any
822 * requests happening from here on anyway.
824 bdrv_drain_all_begin();
826 /* No more vcpu or device emulation activity beyond this point */
830 job_cancel_sync_all();
833 /* vhost-user must be cleaned up before chardevs. */
839 user_creatable_cleanup();
840 /* TODO: unref root container, check all devices are ok */