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1 | /* | |
2 | * QEMU main system emulation loop | |
3 | * | |
4 | * Copyright (c) 2003-2020 QEMU contributors | |
5 | * | |
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: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
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. | |
23 | */ | |
24 | ||
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 "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/error-report.h" | |
44 | #include "qemu/log.h" | |
45 | #include "qemu/job.h" | |
46 | #include "qemu/log.h" | |
47 | #include "qemu/module.h" | |
48 | #include "qemu/plugin.h" | |
49 | #include "qemu/sockets.h" | |
50 | #include "qemu/thread.h" | |
51 | #include "qom/object.h" | |
52 | #include "qom/object_interfaces.h" | |
53 | #include "sysemu/cpus.h" | |
54 | #include "sysemu/qtest.h" | |
55 | #include "sysemu/replay.h" | |
56 | #include "sysemu/reset.h" | |
57 | #include "sysemu/runstate.h" | |
58 | #include "sysemu/runstate-action.h" | |
59 | #include "sysemu/sysemu.h" | |
60 | #include "sysemu/tpm.h" | |
61 | #include "trace.h" | |
62 | ||
63 | static NotifierList exit_notifiers = | |
64 | NOTIFIER_LIST_INITIALIZER(exit_notifiers); | |
65 | ||
66 | static RunState current_run_state = RUN_STATE_PRELAUNCH; | |
67 | ||
68 | /* We use RUN_STATE__MAX but any invalid value will do */ | |
69 | static RunState vmstop_requested = RUN_STATE__MAX; | |
70 | static QemuMutex vmstop_lock; | |
71 | ||
72 | typedef struct { | |
73 | RunState from; | |
74 | RunState to; | |
75 | } RunStateTransition; | |
76 | ||
77 | static const RunStateTransition runstate_transitions_def[] = { | |
78 | { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE }, | |
79 | ||
80 | { RUN_STATE_DEBUG, RUN_STATE_RUNNING }, | |
81 | { RUN_STATE_DEBUG, RUN_STATE_FINISH_MIGRATE }, | |
82 | { RUN_STATE_DEBUG, RUN_STATE_PRELAUNCH }, | |
83 | ||
84 | { RUN_STATE_INMIGRATE, RUN_STATE_INTERNAL_ERROR }, | |
85 | { RUN_STATE_INMIGRATE, RUN_STATE_IO_ERROR }, | |
86 | { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED }, | |
87 | { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING }, | |
88 | { RUN_STATE_INMIGRATE, RUN_STATE_SHUTDOWN }, | |
89 | { RUN_STATE_INMIGRATE, RUN_STATE_SUSPENDED }, | |
90 | { RUN_STATE_INMIGRATE, RUN_STATE_WATCHDOG }, | |
91 | { RUN_STATE_INMIGRATE, RUN_STATE_GUEST_PANICKED }, | |
92 | { RUN_STATE_INMIGRATE, RUN_STATE_FINISH_MIGRATE }, | |
93 | { RUN_STATE_INMIGRATE, RUN_STATE_PRELAUNCH }, | |
94 | { RUN_STATE_INMIGRATE, RUN_STATE_POSTMIGRATE }, | |
95 | { RUN_STATE_INMIGRATE, RUN_STATE_COLO }, | |
96 | ||
97 | { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED }, | |
98 | { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE }, | |
99 | { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PRELAUNCH }, | |
100 | ||
101 | { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING }, | |
102 | { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE }, | |
103 | { RUN_STATE_IO_ERROR, RUN_STATE_PRELAUNCH }, | |
104 | ||
105 | { RUN_STATE_PAUSED, RUN_STATE_RUNNING }, | |
106 | { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE }, | |
107 | { RUN_STATE_PAUSED, RUN_STATE_POSTMIGRATE }, | |
108 | { RUN_STATE_PAUSED, RUN_STATE_PRELAUNCH }, | |
109 | { RUN_STATE_PAUSED, RUN_STATE_COLO}, | |
110 | ||
111 | { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING }, | |
112 | { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE }, | |
113 | { RUN_STATE_POSTMIGRATE, RUN_STATE_PRELAUNCH }, | |
114 | ||
115 | { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING }, | |
116 | { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE }, | |
117 | { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE }, | |
118 | ||
119 | { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING }, | |
120 | { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PAUSED }, | |
121 | { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE }, | |
122 | { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PRELAUNCH }, | |
123 | { RUN_STATE_FINISH_MIGRATE, RUN_STATE_COLO}, | |
124 | ||
125 | { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING }, | |
126 | { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH }, | |
127 | ||
128 | { RUN_STATE_COLO, RUN_STATE_RUNNING }, | |
129 | { RUN_STATE_COLO, RUN_STATE_PRELAUNCH }, | |
130 | { RUN_STATE_COLO, RUN_STATE_SHUTDOWN}, | |
131 | ||
132 | { RUN_STATE_RUNNING, RUN_STATE_DEBUG }, | |
133 | { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR }, | |
134 | { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR }, | |
135 | { RUN_STATE_RUNNING, RUN_STATE_PAUSED }, | |
136 | { RUN_STATE_RUNNING, RUN_STATE_FINISH_MIGRATE }, | |
137 | { RUN_STATE_RUNNING, RUN_STATE_RESTORE_VM }, | |
138 | { RUN_STATE_RUNNING, RUN_STATE_SAVE_VM }, | |
139 | { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN }, | |
140 | { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG }, | |
141 | { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED }, | |
142 | { RUN_STATE_RUNNING, RUN_STATE_COLO}, | |
143 | ||
144 | { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING }, | |
145 | ||
146 | { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED }, | |
147 | { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE }, | |
148 | { RUN_STATE_SHUTDOWN, RUN_STATE_PRELAUNCH }, | |
149 | { RUN_STATE_SHUTDOWN, RUN_STATE_COLO }, | |
150 | ||
151 | { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED }, | |
152 | { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED }, | |
153 | { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING }, | |
154 | { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE }, | |
155 | { RUN_STATE_SUSPENDED, RUN_STATE_PRELAUNCH }, | |
156 | { RUN_STATE_SUSPENDED, RUN_STATE_COLO}, | |
157 | ||
158 | { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING }, | |
159 | { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE }, | |
160 | { RUN_STATE_WATCHDOG, RUN_STATE_PRELAUNCH }, | |
161 | { RUN_STATE_WATCHDOG, RUN_STATE_COLO}, | |
162 | ||
163 | { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING }, | |
164 | { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE }, | |
165 | { RUN_STATE_GUEST_PANICKED, RUN_STATE_PRELAUNCH }, | |
166 | ||
167 | { RUN_STATE__MAX, RUN_STATE__MAX }, | |
168 | }; | |
169 | ||
170 | static bool runstate_valid_transitions[RUN_STATE__MAX][RUN_STATE__MAX]; | |
171 | ||
172 | bool runstate_check(RunState state) | |
173 | { | |
174 | return current_run_state == state; | |
175 | } | |
176 | ||
177 | bool runstate_store(char *str, size_t size) | |
178 | { | |
179 | const char *state = RunState_str(current_run_state); | |
180 | size_t len = strlen(state) + 1; | |
181 | ||
182 | if (len > size) { | |
183 | return false; | |
184 | } | |
185 | memcpy(str, state, len); | |
186 | return true; | |
187 | } | |
188 | ||
189 | static void runstate_init(void) | |
190 | { | |
191 | const RunStateTransition *p; | |
192 | ||
193 | memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions)); | |
194 | for (p = &runstate_transitions_def[0]; p->from != RUN_STATE__MAX; p++) { | |
195 | runstate_valid_transitions[p->from][p->to] = true; | |
196 | } | |
197 | ||
198 | qemu_mutex_init(&vmstop_lock); | |
199 | } | |
200 | ||
201 | /* This function will abort() on invalid state transitions */ | |
202 | void runstate_set(RunState new_state) | |
203 | { | |
204 | assert(new_state < RUN_STATE__MAX); | |
205 | ||
206 | trace_runstate_set(current_run_state, RunState_str(current_run_state), | |
207 | new_state, RunState_str(new_state)); | |
208 | ||
209 | if (current_run_state == new_state) { | |
210 | return; | |
211 | } | |
212 | ||
213 | if (!runstate_valid_transitions[current_run_state][new_state]) { | |
214 | error_report("invalid runstate transition: '%s' -> '%s'", | |
215 | RunState_str(current_run_state), | |
216 | RunState_str(new_state)); | |
217 | abort(); | |
218 | } | |
219 | ||
220 | current_run_state = new_state; | |
221 | } | |
222 | ||
223 | bool runstate_is_running(void) | |
224 | { | |
225 | return runstate_check(RUN_STATE_RUNNING); | |
226 | } | |
227 | ||
228 | bool runstate_needs_reset(void) | |
229 | { | |
230 | return runstate_check(RUN_STATE_INTERNAL_ERROR) || | |
231 | runstate_check(RUN_STATE_SHUTDOWN); | |
232 | } | |
233 | ||
234 | StatusInfo *qmp_query_status(Error **errp) | |
235 | { | |
236 | StatusInfo *info = g_malloc0(sizeof(*info)); | |
237 | ||
238 | info->running = runstate_is_running(); | |
239 | info->singlestep = singlestep; | |
240 | info->status = current_run_state; | |
241 | ||
242 | return info; | |
243 | } | |
244 | ||
245 | bool qemu_vmstop_requested(RunState *r) | |
246 | { | |
247 | qemu_mutex_lock(&vmstop_lock); | |
248 | *r = vmstop_requested; | |
249 | vmstop_requested = RUN_STATE__MAX; | |
250 | qemu_mutex_unlock(&vmstop_lock); | |
251 | return *r < RUN_STATE__MAX; | |
252 | } | |
253 | ||
254 | void qemu_system_vmstop_request_prepare(void) | |
255 | { | |
256 | qemu_mutex_lock(&vmstop_lock); | |
257 | } | |
258 | ||
259 | void qemu_system_vmstop_request(RunState state) | |
260 | { | |
261 | vmstop_requested = state; | |
262 | qemu_mutex_unlock(&vmstop_lock); | |
263 | qemu_notify_event(); | |
264 | } | |
265 | struct VMChangeStateEntry { | |
266 | VMChangeStateHandler *cb; | |
267 | void *opaque; | |
268 | QTAILQ_ENTRY(VMChangeStateEntry) entries; | |
269 | int priority; | |
270 | }; | |
271 | ||
272 | static QTAILQ_HEAD(, VMChangeStateEntry) vm_change_state_head = | |
273 | QTAILQ_HEAD_INITIALIZER(vm_change_state_head); | |
274 | ||
275 | /** | |
276 | * qemu_add_vm_change_state_handler_prio: | |
277 | * @cb: the callback to invoke | |
278 | * @opaque: user data passed to the callback | |
279 | * @priority: low priorities execute first when the vm runs and the reverse is | |
280 | * true when the vm stops | |
281 | * | |
282 | * Register a callback function that is invoked when the vm starts or stops | |
283 | * running. | |
284 | * | |
285 | * Returns: an entry to be freed using qemu_del_vm_change_state_handler() | |
286 | */ | |
287 | VMChangeStateEntry *qemu_add_vm_change_state_handler_prio( | |
288 | VMChangeStateHandler *cb, void *opaque, int priority) | |
289 | { | |
290 | VMChangeStateEntry *e; | |
291 | VMChangeStateEntry *other; | |
292 | ||
293 | e = g_malloc0(sizeof(*e)); | |
294 | e->cb = cb; | |
295 | e->opaque = opaque; | |
296 | e->priority = priority; | |
297 | ||
298 | /* Keep list sorted in ascending priority order */ | |
299 | QTAILQ_FOREACH(other, &vm_change_state_head, entries) { | |
300 | if (priority < other->priority) { | |
301 | QTAILQ_INSERT_BEFORE(other, e, entries); | |
302 | return e; | |
303 | } | |
304 | } | |
305 | ||
306 | QTAILQ_INSERT_TAIL(&vm_change_state_head, e, entries); | |
307 | return e; | |
308 | } | |
309 | ||
310 | VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb, | |
311 | void *opaque) | |
312 | { | |
313 | return qemu_add_vm_change_state_handler_prio(cb, opaque, 0); | |
314 | } | |
315 | ||
316 | void qemu_del_vm_change_state_handler(VMChangeStateEntry *e) | |
317 | { | |
318 | QTAILQ_REMOVE(&vm_change_state_head, e, entries); | |
319 | g_free(e); | |
320 | } | |
321 | ||
322 | void vm_state_notify(bool running, RunState state) | |
323 | { | |
324 | VMChangeStateEntry *e, *next; | |
325 | ||
326 | trace_vm_state_notify(running, state, RunState_str(state)); | |
327 | ||
328 | if (running) { | |
329 | QTAILQ_FOREACH_SAFE(e, &vm_change_state_head, entries, next) { | |
330 | e->cb(e->opaque, running, state); | |
331 | } | |
332 | } else { | |
333 | QTAILQ_FOREACH_REVERSE_SAFE(e, &vm_change_state_head, entries, next) { | |
334 | e->cb(e->opaque, running, state); | |
335 | } | |
336 | } | |
337 | } | |
338 | ||
339 | static ShutdownCause reset_requested; | |
340 | static ShutdownCause shutdown_requested; | |
341 | static int shutdown_signal; | |
342 | static pid_t shutdown_pid; | |
343 | static int powerdown_requested; | |
344 | static int debug_requested; | |
345 | static int suspend_requested; | |
346 | static WakeupReason wakeup_reason; | |
347 | static NotifierList powerdown_notifiers = | |
348 | NOTIFIER_LIST_INITIALIZER(powerdown_notifiers); | |
349 | static NotifierList suspend_notifiers = | |
350 | NOTIFIER_LIST_INITIALIZER(suspend_notifiers); | |
351 | static NotifierList wakeup_notifiers = | |
352 | NOTIFIER_LIST_INITIALIZER(wakeup_notifiers); | |
353 | static NotifierList shutdown_notifiers = | |
354 | NOTIFIER_LIST_INITIALIZER(shutdown_notifiers); | |
355 | static uint32_t wakeup_reason_mask = ~(1 << QEMU_WAKEUP_REASON_NONE); | |
356 | ||
357 | ShutdownCause qemu_shutdown_requested_get(void) | |
358 | { | |
359 | return shutdown_requested; | |
360 | } | |
361 | ||
362 | ShutdownCause qemu_reset_requested_get(void) | |
363 | { | |
364 | return reset_requested; | |
365 | } | |
366 | ||
367 | static int qemu_shutdown_requested(void) | |
368 | { | |
369 | return qatomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE); | |
370 | } | |
371 | ||
372 | static void qemu_kill_report(void) | |
373 | { | |
374 | if (!qtest_driver() && shutdown_signal) { | |
375 | if (shutdown_pid == 0) { | |
376 | /* This happens for eg ^C at the terminal, so it's worth | |
377 | * avoiding printing an odd message in that case. | |
378 | */ | |
379 | error_report("terminating on signal %d", shutdown_signal); | |
380 | } else { | |
381 | char *shutdown_cmd = qemu_get_pid_name(shutdown_pid); | |
382 | ||
383 | error_report("terminating on signal %d from pid " FMT_pid " (%s)", | |
384 | shutdown_signal, shutdown_pid, | |
385 | shutdown_cmd ? shutdown_cmd : "<unknown process>"); | |
386 | g_free(shutdown_cmd); | |
387 | } | |
388 | shutdown_signal = 0; | |
389 | } | |
390 | } | |
391 | ||
392 | static ShutdownCause qemu_reset_requested(void) | |
393 | { | |
394 | ShutdownCause r = reset_requested; | |
395 | ||
396 | if (r && replay_checkpoint(CHECKPOINT_RESET_REQUESTED)) { | |
397 | reset_requested = SHUTDOWN_CAUSE_NONE; | |
398 | return r; | |
399 | } | |
400 | return SHUTDOWN_CAUSE_NONE; | |
401 | } | |
402 | ||
403 | static int qemu_suspend_requested(void) | |
404 | { | |
405 | int r = suspend_requested; | |
406 | if (r && replay_checkpoint(CHECKPOINT_SUSPEND_REQUESTED)) { | |
407 | suspend_requested = 0; | |
408 | return r; | |
409 | } | |
410 | return false; | |
411 | } | |
412 | ||
413 | static WakeupReason qemu_wakeup_requested(void) | |
414 | { | |
415 | return wakeup_reason; | |
416 | } | |
417 | ||
418 | static int qemu_powerdown_requested(void) | |
419 | { | |
420 | int r = powerdown_requested; | |
421 | powerdown_requested = 0; | |
422 | return r; | |
423 | } | |
424 | ||
425 | static int qemu_debug_requested(void) | |
426 | { | |
427 | int r = debug_requested; | |
428 | debug_requested = 0; | |
429 | return r; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Reset the VM. Issue an event unless @reason is SHUTDOWN_CAUSE_NONE. | |
434 | */ | |
435 | void qemu_system_reset(ShutdownCause reason) | |
436 | { | |
437 | MachineClass *mc; | |
438 | ||
439 | mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; | |
440 | ||
441 | cpu_synchronize_all_states(); | |
442 | ||
443 | if (mc && mc->reset) { | |
444 | mc->reset(current_machine); | |
445 | } else { | |
446 | qemu_devices_reset(); | |
447 | } | |
448 | if (reason && reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { | |
449 | qapi_event_send_reset(shutdown_caused_by_guest(reason), reason); | |
450 | } | |
451 | cpu_synchronize_all_post_reset(); | |
452 | } | |
453 | ||
454 | /* | |
455 | * Wake the VM after suspend. | |
456 | */ | |
457 | static void qemu_system_wakeup(void) | |
458 | { | |
459 | MachineClass *mc; | |
460 | ||
461 | mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; | |
462 | ||
463 | if (mc && mc->wakeup) { | |
464 | mc->wakeup(current_machine); | |
465 | } | |
466 | } | |
467 | ||
468 | void qemu_system_guest_panicked(GuestPanicInformation *info) | |
469 | { | |
470 | qemu_log_mask(LOG_GUEST_ERROR, "Guest crashed"); | |
471 | ||
472 | if (current_cpu) { | |
473 | current_cpu->crash_occurred = true; | |
474 | } | |
475 | /* | |
476 | * TODO: Currently the available panic actions are: none, pause, and | |
477 | * shutdown, but in principle debug and reset could be supported as well. | |
478 | * Investigate any potential use cases for the unimplemented actions. | |
479 | */ | |
480 | if (panic_action == PANIC_ACTION_PAUSE | |
481 | || (panic_action == PANIC_ACTION_SHUTDOWN && shutdown_action == SHUTDOWN_ACTION_PAUSE)) { | |
482 | qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, | |
483 | !!info, info); | |
484 | vm_stop(RUN_STATE_GUEST_PANICKED); | |
485 | } else if (panic_action == PANIC_ACTION_SHUTDOWN || | |
486 | panic_action == PANIC_ACTION_EXIT_FAILURE) { | |
487 | qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF, | |
488 | !!info, info); | |
489 | vm_stop(RUN_STATE_GUEST_PANICKED); | |
490 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC); | |
491 | } else { | |
492 | qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_RUN, | |
493 | !!info, info); | |
494 | } | |
495 | ||
496 | if (info) { | |
497 | if (info->type == GUEST_PANIC_INFORMATION_TYPE_HYPER_V) { | |
498 | qemu_log_mask(LOG_GUEST_ERROR, "\nHV crash parameters: (%#"PRIx64 | |
499 | " %#"PRIx64" %#"PRIx64" %#"PRIx64" %#"PRIx64")\n", | |
500 | info->u.hyper_v.arg1, | |
501 | info->u.hyper_v.arg2, | |
502 | info->u.hyper_v.arg3, | |
503 | info->u.hyper_v.arg4, | |
504 | info->u.hyper_v.arg5); | |
505 | } else if (info->type == GUEST_PANIC_INFORMATION_TYPE_S390) { | |
506 | qemu_log_mask(LOG_GUEST_ERROR, " on cpu %d: %s\n" | |
507 | "PSW: 0x%016" PRIx64 " 0x%016" PRIx64"\n", | |
508 | info->u.s390.core, | |
509 | S390CrashReason_str(info->u.s390.reason), | |
510 | info->u.s390.psw_mask, | |
511 | info->u.s390.psw_addr); | |
512 | } | |
513 | qapi_free_GuestPanicInformation(info); | |
514 | } | |
515 | } | |
516 | ||
517 | void qemu_system_guest_crashloaded(GuestPanicInformation *info) | |
518 | { | |
519 | qemu_log_mask(LOG_GUEST_ERROR, "Guest crash loaded"); | |
520 | ||
521 | qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN, | |
522 | !!info, info); | |
523 | ||
524 | if (info) { | |
525 | qapi_free_GuestPanicInformation(info); | |
526 | } | |
527 | } | |
528 | ||
529 | void qemu_system_reset_request(ShutdownCause reason) | |
530 | { | |
531 | if (reboot_action == REBOOT_ACTION_SHUTDOWN && | |
532 | reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { | |
533 | shutdown_requested = reason; | |
534 | } else if (!cpus_are_resettable()) { | |
535 | error_report("cpus are not resettable, terminating"); | |
536 | shutdown_requested = reason; | |
537 | } else { | |
538 | reset_requested = reason; | |
539 | } | |
540 | cpu_stop_current(); | |
541 | qemu_notify_event(); | |
542 | } | |
543 | ||
544 | static void qemu_system_suspend(void) | |
545 | { | |
546 | pause_all_vcpus(); | |
547 | notifier_list_notify(&suspend_notifiers, NULL); | |
548 | runstate_set(RUN_STATE_SUSPENDED); | |
549 | qapi_event_send_suspend(); | |
550 | } | |
551 | ||
552 | void qemu_system_suspend_request(void) | |
553 | { | |
554 | if (runstate_check(RUN_STATE_SUSPENDED)) { | |
555 | return; | |
556 | } | |
557 | suspend_requested = 1; | |
558 | cpu_stop_current(); | |
559 | qemu_notify_event(); | |
560 | } | |
561 | ||
562 | void qemu_register_suspend_notifier(Notifier *notifier) | |
563 | { | |
564 | notifier_list_add(&suspend_notifiers, notifier); | |
565 | } | |
566 | ||
567 | void qemu_system_wakeup_request(WakeupReason reason, Error **errp) | |
568 | { | |
569 | trace_system_wakeup_request(reason); | |
570 | ||
571 | if (!runstate_check(RUN_STATE_SUSPENDED)) { | |
572 | error_setg(errp, | |
573 | "Unable to wake up: guest is not in suspended state"); | |
574 | return; | |
575 | } | |
576 | if (!(wakeup_reason_mask & (1 << reason))) { | |
577 | return; | |
578 | } | |
579 | runstate_set(RUN_STATE_RUNNING); | |
580 | wakeup_reason = reason; | |
581 | qemu_notify_event(); | |
582 | } | |
583 | ||
584 | void qemu_system_wakeup_enable(WakeupReason reason, bool enabled) | |
585 | { | |
586 | if (enabled) { | |
587 | wakeup_reason_mask |= (1 << reason); | |
588 | } else { | |
589 | wakeup_reason_mask &= ~(1 << reason); | |
590 | } | |
591 | } | |
592 | ||
593 | void qemu_register_wakeup_notifier(Notifier *notifier) | |
594 | { | |
595 | notifier_list_add(&wakeup_notifiers, notifier); | |
596 | } | |
597 | ||
598 | static bool wakeup_suspend_enabled; | |
599 | ||
600 | void qemu_register_wakeup_support(void) | |
601 | { | |
602 | wakeup_suspend_enabled = true; | |
603 | } | |
604 | ||
605 | bool qemu_wakeup_suspend_enabled(void) | |
606 | { | |
607 | return wakeup_suspend_enabled; | |
608 | } | |
609 | ||
610 | void qemu_system_killed(int signal, pid_t pid) | |
611 | { | |
612 | shutdown_signal = signal; | |
613 | shutdown_pid = pid; | |
614 | shutdown_action = SHUTDOWN_ACTION_POWEROFF; | |
615 | ||
616 | /* Cannot call qemu_system_shutdown_request directly because | |
617 | * we are in a signal handler. | |
618 | */ | |
619 | shutdown_requested = SHUTDOWN_CAUSE_HOST_SIGNAL; | |
620 | qemu_notify_event(); | |
621 | } | |
622 | ||
623 | void qemu_system_shutdown_request(ShutdownCause reason) | |
624 | { | |
625 | trace_qemu_system_shutdown_request(reason); | |
626 | replay_shutdown_request(reason); | |
627 | shutdown_requested = reason; | |
628 | qemu_notify_event(); | |
629 | } | |
630 | ||
631 | static void qemu_system_powerdown(void) | |
632 | { | |
633 | qapi_event_send_powerdown(); | |
634 | notifier_list_notify(&powerdown_notifiers, NULL); | |
635 | } | |
636 | ||
637 | static void qemu_system_shutdown(ShutdownCause cause) | |
638 | { | |
639 | qapi_event_send_shutdown(shutdown_caused_by_guest(cause), cause); | |
640 | notifier_list_notify(&shutdown_notifiers, &cause); | |
641 | } | |
642 | ||
643 | void qemu_system_powerdown_request(void) | |
644 | { | |
645 | trace_qemu_system_powerdown_request(); | |
646 | powerdown_requested = 1; | |
647 | qemu_notify_event(); | |
648 | } | |
649 | ||
650 | void qemu_register_powerdown_notifier(Notifier *notifier) | |
651 | { | |
652 | notifier_list_add(&powerdown_notifiers, notifier); | |
653 | } | |
654 | ||
655 | void qemu_register_shutdown_notifier(Notifier *notifier) | |
656 | { | |
657 | notifier_list_add(&shutdown_notifiers, notifier); | |
658 | } | |
659 | ||
660 | void qemu_system_debug_request(void) | |
661 | { | |
662 | debug_requested = 1; | |
663 | qemu_notify_event(); | |
664 | } | |
665 | ||
666 | static bool main_loop_should_exit(int *status) | |
667 | { | |
668 | RunState r; | |
669 | ShutdownCause request; | |
670 | ||
671 | if (qemu_debug_requested()) { | |
672 | vm_stop(RUN_STATE_DEBUG); | |
673 | } | |
674 | if (qemu_suspend_requested()) { | |
675 | qemu_system_suspend(); | |
676 | } | |
677 | request = qemu_shutdown_requested(); | |
678 | if (request) { | |
679 | qemu_kill_report(); | |
680 | qemu_system_shutdown(request); | |
681 | if (shutdown_action == SHUTDOWN_ACTION_PAUSE) { | |
682 | vm_stop(RUN_STATE_SHUTDOWN); | |
683 | } else { | |
684 | if (request == SHUTDOWN_CAUSE_GUEST_PANIC && | |
685 | panic_action == PANIC_ACTION_EXIT_FAILURE) { | |
686 | *status = EXIT_FAILURE; | |
687 | } | |
688 | return true; | |
689 | } | |
690 | } | |
691 | request = qemu_reset_requested(); | |
692 | if (request) { | |
693 | pause_all_vcpus(); | |
694 | qemu_system_reset(request); | |
695 | resume_all_vcpus(); | |
696 | /* | |
697 | * runstate can change in pause_all_vcpus() | |
698 | * as iothread mutex is unlocked | |
699 | */ | |
700 | if (!runstate_check(RUN_STATE_RUNNING) && | |
701 | !runstate_check(RUN_STATE_INMIGRATE) && | |
702 | !runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
703 | runstate_set(RUN_STATE_PRELAUNCH); | |
704 | } | |
705 | } | |
706 | if (qemu_wakeup_requested()) { | |
707 | pause_all_vcpus(); | |
708 | qemu_system_wakeup(); | |
709 | notifier_list_notify(&wakeup_notifiers, &wakeup_reason); | |
710 | wakeup_reason = QEMU_WAKEUP_REASON_NONE; | |
711 | resume_all_vcpus(); | |
712 | qapi_event_send_wakeup(); | |
713 | } | |
714 | if (qemu_powerdown_requested()) { | |
715 | qemu_system_powerdown(); | |
716 | } | |
717 | if (qemu_vmstop_requested(&r)) { | |
718 | vm_stop(r); | |
719 | } | |
720 | return false; | |
721 | } | |
722 | ||
723 | int qemu_main_loop(void) | |
724 | { | |
725 | int status = EXIT_SUCCESS; | |
726 | #ifdef CONFIG_PROFILER | |
727 | int64_t ti; | |
728 | #endif | |
729 | ||
730 | while (!main_loop_should_exit(&status)) { | |
731 | #ifdef CONFIG_PROFILER | |
732 | ti = profile_getclock(); | |
733 | #endif | |
734 | main_loop_wait(false); | |
735 | #ifdef CONFIG_PROFILER | |
736 | dev_time += profile_getclock() - ti; | |
737 | #endif | |
738 | } | |
739 | ||
740 | return status; | |
741 | } | |
742 | ||
743 | void qemu_add_exit_notifier(Notifier *notify) | |
744 | { | |
745 | notifier_list_add(&exit_notifiers, notify); | |
746 | } | |
747 | ||
748 | void qemu_remove_exit_notifier(Notifier *notify) | |
749 | { | |
750 | notifier_remove(notify); | |
751 | } | |
752 | ||
753 | static void qemu_run_exit_notifiers(void) | |
754 | { | |
755 | notifier_list_notify(&exit_notifiers, NULL); | |
756 | } | |
757 | ||
758 | void qemu_init_subsystems(void) | |
759 | { | |
760 | Error *err = NULL; | |
761 | ||
762 | os_set_line_buffering(); | |
763 | ||
764 | module_call_init(MODULE_INIT_TRACE); | |
765 | ||
766 | qemu_init_cpu_list(); | |
767 | qemu_init_cpu_loop(); | |
768 | qemu_mutex_lock_iothread(); | |
769 | ||
770 | atexit(qemu_run_exit_notifiers); | |
771 | ||
772 | module_call_init(MODULE_INIT_QOM); | |
773 | module_call_init(MODULE_INIT_MIGRATION); | |
774 | ||
775 | runstate_init(); | |
776 | precopy_infrastructure_init(); | |
777 | postcopy_infrastructure_init(); | |
778 | monitor_init_globals(); | |
779 | ||
780 | if (qcrypto_init(&err) < 0) { | |
781 | error_reportf_err(err, "cannot initialize crypto: "); | |
782 | exit(1); | |
783 | } | |
784 | ||
785 | os_setup_early_signal_handling(); | |
786 | ||
787 | bdrv_init_with_whitelist(); | |
788 | socket_init(); | |
789 | } | |
790 | ||
791 | ||
792 | void qemu_cleanup(void) | |
793 | { | |
794 | gdb_exit(0); | |
795 | ||
796 | /* | |
797 | * cleaning up the migration object cancels any existing migration | |
798 | * try to do this early so that it also stops using devices. | |
799 | */ | |
800 | migration_shutdown(); | |
801 | ||
802 | /* | |
803 | * Close the exports before draining the block layer. The export | |
804 | * drivers may have coroutines yielding on it, so we need to clean | |
805 | * them up before the drain, as otherwise they may be get stuck in | |
806 | * blk_wait_while_drained(). | |
807 | */ | |
808 | blk_exp_close_all(); | |
809 | ||
810 | /* | |
811 | * We must cancel all block jobs while the block layer is drained, | |
812 | * or cancelling will be affected by throttling and thus may block | |
813 | * for an extended period of time. | |
814 | * vm_shutdown() will bdrv_drain_all(), so we may as well include | |
815 | * it in the drained section. | |
816 | * We do not need to end this section, because we do not want any | |
817 | * requests happening from here on anyway. | |
818 | */ | |
819 | bdrv_drain_all_begin(); | |
820 | ||
821 | /* No more vcpu or device emulation activity beyond this point */ | |
822 | vm_shutdown(); | |
823 | replay_finish(); | |
824 | ||
825 | job_cancel_sync_all(); | |
826 | bdrv_close_all(); | |
827 | ||
828 | /* vhost-user must be cleaned up before chardevs. */ | |
829 | tpm_cleanup(); | |
830 | net_cleanup(); | |
831 | audio_cleanup(); | |
832 | monitor_cleanup(); | |
833 | qemu_chr_cleanup(); | |
834 | user_creatable_cleanup(); | |
835 | /* TODO: unref root container, check all devices are ok */ | |
836 | } |