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 "gdbstub/syscalls.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/accel.h" 44 #include "qemu/error-report.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/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" 62 #include "trace.h" 63 64 static NotifierList exit_notifiers = 65 NOTIFIER_LIST_INITIALIZER(exit_notifiers); 66 67 static RunState current_run_state = RUN_STATE_PRELAUNCH; 68 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; 72 73 typedef struct { 74 RunState from; 75 RunState to; 76 } RunStateTransition; 77 78 static const RunStateTransition runstate_transitions_def[] = { 79 { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE }, 80 { RUN_STATE_PRELAUNCH, RUN_STATE_SUSPENDED }, 81 82 { RUN_STATE_DEBUG, RUN_STATE_RUNNING }, 83 { RUN_STATE_DEBUG, RUN_STATE_FINISH_MIGRATE }, 84 { RUN_STATE_DEBUG, RUN_STATE_PRELAUNCH }, 85 86 { RUN_STATE_INMIGRATE, RUN_STATE_INTERNAL_ERROR }, 87 { RUN_STATE_INMIGRATE, RUN_STATE_IO_ERROR }, 88 { RUN_STATE_INMIGRATE, RUN_STATE_PAUSED }, 89 { RUN_STATE_INMIGRATE, RUN_STATE_RUNNING }, 90 { RUN_STATE_INMIGRATE, RUN_STATE_SHUTDOWN }, 91 { RUN_STATE_INMIGRATE, RUN_STATE_SUSPENDED }, 92 { RUN_STATE_INMIGRATE, RUN_STATE_WATCHDOG }, 93 { RUN_STATE_INMIGRATE, RUN_STATE_GUEST_PANICKED }, 94 { RUN_STATE_INMIGRATE, RUN_STATE_FINISH_MIGRATE }, 95 { RUN_STATE_INMIGRATE, RUN_STATE_PRELAUNCH }, 96 { RUN_STATE_INMIGRATE, RUN_STATE_POSTMIGRATE }, 97 { RUN_STATE_INMIGRATE, RUN_STATE_COLO }, 98 99 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED }, 100 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE }, 101 { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PRELAUNCH }, 102 103 { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING }, 104 { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE }, 105 { RUN_STATE_IO_ERROR, RUN_STATE_PRELAUNCH }, 106 107 { RUN_STATE_PAUSED, RUN_STATE_RUNNING }, 108 { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE }, 109 { RUN_STATE_PAUSED, RUN_STATE_POSTMIGRATE }, 110 { RUN_STATE_PAUSED, RUN_STATE_PRELAUNCH }, 111 { RUN_STATE_PAUSED, RUN_STATE_COLO}, 112 { RUN_STATE_PAUSED, RUN_STATE_SUSPENDED}, 113 114 { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING }, 115 { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE }, 116 { RUN_STATE_POSTMIGRATE, RUN_STATE_PRELAUNCH }, 117 118 { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING }, 119 { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE }, 120 { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE }, 121 122 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING }, 123 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PAUSED }, 124 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE }, 125 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PRELAUNCH }, 126 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_COLO }, 127 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_INTERNAL_ERROR }, 128 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_IO_ERROR }, 129 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_SHUTDOWN }, 130 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_SUSPENDED }, 131 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_WATCHDOG }, 132 { RUN_STATE_FINISH_MIGRATE, RUN_STATE_GUEST_PANICKED }, 133 134 { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING }, 135 { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH }, 136 { RUN_STATE_RESTORE_VM, RUN_STATE_SUSPENDED }, 137 138 { RUN_STATE_COLO, RUN_STATE_RUNNING }, 139 { RUN_STATE_COLO, RUN_STATE_PRELAUNCH }, 140 { RUN_STATE_COLO, RUN_STATE_SHUTDOWN}, 141 142 { RUN_STATE_RUNNING, RUN_STATE_DEBUG }, 143 { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR }, 144 { RUN_STATE_RUNNING, RUN_STATE_IO_ERROR }, 145 { RUN_STATE_RUNNING, RUN_STATE_PAUSED }, 146 { RUN_STATE_RUNNING, RUN_STATE_FINISH_MIGRATE }, 147 { RUN_STATE_RUNNING, RUN_STATE_RESTORE_VM }, 148 { RUN_STATE_RUNNING, RUN_STATE_SAVE_VM }, 149 { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN }, 150 { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG }, 151 { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED }, 152 { RUN_STATE_RUNNING, RUN_STATE_COLO}, 153 154 { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING }, 155 { RUN_STATE_SAVE_VM, RUN_STATE_SUSPENDED }, 156 157 { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED }, 158 { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE }, 159 { RUN_STATE_SHUTDOWN, RUN_STATE_PRELAUNCH }, 160 { RUN_STATE_SHUTDOWN, RUN_STATE_COLO }, 161 162 { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED }, 163 { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED }, 164 { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING }, 165 { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE }, 166 { RUN_STATE_SUSPENDED, RUN_STATE_PRELAUNCH }, 167 { RUN_STATE_SUSPENDED, RUN_STATE_COLO}, 168 { RUN_STATE_SUSPENDED, RUN_STATE_PAUSED}, 169 { RUN_STATE_SUSPENDED, RUN_STATE_SAVE_VM }, 170 { RUN_STATE_SUSPENDED, RUN_STATE_RESTORE_VM }, 171 { RUN_STATE_SUSPENDED, RUN_STATE_SHUTDOWN }, 172 173 { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING }, 174 { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE }, 175 { RUN_STATE_WATCHDOG, RUN_STATE_PRELAUNCH }, 176 { RUN_STATE_WATCHDOG, RUN_STATE_COLO}, 177 178 { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING }, 179 { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE }, 180 { RUN_STATE_GUEST_PANICKED, RUN_STATE_PRELAUNCH }, 181 182 { RUN_STATE__MAX, RUN_STATE__MAX }, 183 }; 184 185 static bool runstate_valid_transitions[RUN_STATE__MAX][RUN_STATE__MAX]; 186 187 bool runstate_check(RunState state) 188 { 189 return current_run_state == state; 190 } 191 192 static void runstate_init(void) 193 { 194 const RunStateTransition *p; 195 196 memset(&runstate_valid_transitions, 0, sizeof(runstate_valid_transitions)); 197 for (p = &runstate_transitions_def[0]; p->from != RUN_STATE__MAX; p++) { 198 runstate_valid_transitions[p->from][p->to] = true; 199 } 200 201 qemu_mutex_init(&vmstop_lock); 202 } 203 204 /* This function will abort() on invalid state transitions */ 205 void runstate_set(RunState new_state) 206 { 207 assert(new_state < RUN_STATE__MAX); 208 209 trace_runstate_set(current_run_state, RunState_str(current_run_state), 210 new_state, RunState_str(new_state)); 211 212 if (current_run_state == new_state) { 213 return; 214 } 215 216 if (!runstate_valid_transitions[current_run_state][new_state]) { 217 error_report("invalid runstate transition: '%s' -> '%s'", 218 RunState_str(current_run_state), 219 RunState_str(new_state)); 220 abort(); 221 } 222 223 current_run_state = new_state; 224 } 225 226 RunState runstate_get(void) 227 { 228 return current_run_state; 229 } 230 231 bool runstate_is_running(void) 232 { 233 return runstate_check(RUN_STATE_RUNNING); 234 } 235 236 bool runstate_needs_reset(void) 237 { 238 return runstate_check(RUN_STATE_INTERNAL_ERROR) || 239 runstate_check(RUN_STATE_SHUTDOWN); 240 } 241 242 StatusInfo *qmp_query_status(Error **errp) 243 { 244 StatusInfo *info = g_malloc0(sizeof(*info)); 245 246 info->running = runstate_is_running(); 247 info->status = current_run_state; 248 249 return info; 250 } 251 252 bool qemu_vmstop_requested(RunState *r) 253 { 254 qemu_mutex_lock(&vmstop_lock); 255 *r = vmstop_requested; 256 vmstop_requested = RUN_STATE__MAX; 257 qemu_mutex_unlock(&vmstop_lock); 258 return *r < RUN_STATE__MAX; 259 } 260 261 void qemu_system_vmstop_request_prepare(void) 262 { 263 qemu_mutex_lock(&vmstop_lock); 264 } 265 266 void qemu_system_vmstop_request(RunState state) 267 { 268 vmstop_requested = state; 269 qemu_mutex_unlock(&vmstop_lock); 270 qemu_notify_event(); 271 } 272 struct VMChangeStateEntry { 273 VMChangeStateHandler *cb; 274 VMChangeStateHandler *prepare_cb; 275 void *opaque; 276 QTAILQ_ENTRY(VMChangeStateEntry) entries; 277 int priority; 278 }; 279 280 static QTAILQ_HEAD(, VMChangeStateEntry) vm_change_state_head = 281 QTAILQ_HEAD_INITIALIZER(vm_change_state_head); 282 283 /** 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 289 * 290 * Register a callback function that is invoked when the vm starts or stops 291 * running. 292 * 293 * Returns: an entry to be freed using qemu_del_vm_change_state_handler() 294 */ 295 VMChangeStateEntry *qemu_add_vm_change_state_handler_prio( 296 VMChangeStateHandler *cb, void *opaque, int priority) 297 { 298 return qemu_add_vm_change_state_handler_prio_full(cb, NULL, opaque, 299 priority); 300 } 301 302 /** 303 * qemu_add_vm_change_state_handler_prio_full: 304 * @cb: the main callback to invoke 305 * @prepare_cb: a callback to invoke before the main callback 306 * @opaque: user data passed to the callbacks 307 * @priority: low priorities execute first when the vm runs and the reverse is 308 * true when the vm stops 309 * 310 * Register a main callback function and an optional prepare callback function 311 * that are invoked when the vm starts or stops running. The main callback and 312 * the prepare callback are called in two separate phases: First all prepare 313 * callbacks are called and only then all main callbacks are called. As its 314 * name suggests, the prepare callback can be used to do some preparatory work 315 * before invoking the main callback. 316 * 317 * Returns: an entry to be freed using qemu_del_vm_change_state_handler() 318 */ 319 VMChangeStateEntry * 320 qemu_add_vm_change_state_handler_prio_full(VMChangeStateHandler *cb, 321 VMChangeStateHandler *prepare_cb, 322 void *opaque, int priority) 323 { 324 VMChangeStateEntry *e; 325 VMChangeStateEntry *other; 326 327 e = g_malloc0(sizeof(*e)); 328 e->cb = cb; 329 e->prepare_cb = prepare_cb; 330 e->opaque = opaque; 331 e->priority = priority; 332 333 /* Keep list sorted in ascending priority order */ 334 QTAILQ_FOREACH(other, &vm_change_state_head, entries) { 335 if (priority < other->priority) { 336 QTAILQ_INSERT_BEFORE(other, e, entries); 337 return e; 338 } 339 } 340 341 QTAILQ_INSERT_TAIL(&vm_change_state_head, e, entries); 342 return e; 343 } 344 345 VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb, 346 void *opaque) 347 { 348 return qemu_add_vm_change_state_handler_prio(cb, opaque, 0); 349 } 350 351 void qemu_del_vm_change_state_handler(VMChangeStateEntry *e) 352 { 353 QTAILQ_REMOVE(&vm_change_state_head, e, entries); 354 g_free(e); 355 } 356 357 void vm_state_notify(bool running, RunState state) 358 { 359 VMChangeStateEntry *e, *next; 360 361 trace_vm_state_notify(running, state, RunState_str(state)); 362 363 if (running) { 364 QTAILQ_FOREACH_SAFE(e, &vm_change_state_head, entries, next) { 365 if (e->prepare_cb) { 366 e->prepare_cb(e->opaque, running, state); 367 } 368 } 369 370 QTAILQ_FOREACH_SAFE(e, &vm_change_state_head, entries, next) { 371 e->cb(e->opaque, running, state); 372 } 373 } else { 374 QTAILQ_FOREACH_REVERSE_SAFE(e, &vm_change_state_head, entries, next) { 375 if (e->prepare_cb) { 376 e->prepare_cb(e->opaque, running, state); 377 } 378 } 379 380 QTAILQ_FOREACH_REVERSE_SAFE(e, &vm_change_state_head, entries, next) { 381 e->cb(e->opaque, running, state); 382 } 383 } 384 } 385 386 static ShutdownCause reset_requested; 387 static ShutdownCause shutdown_requested; 388 static int shutdown_exit_code = EXIT_SUCCESS; 389 static int shutdown_signal; 390 static pid_t shutdown_pid; 391 static int powerdown_requested; 392 static int debug_requested; 393 static int suspend_requested; 394 static WakeupReason wakeup_reason; 395 static NotifierList powerdown_notifiers = 396 NOTIFIER_LIST_INITIALIZER(powerdown_notifiers); 397 static NotifierList suspend_notifiers = 398 NOTIFIER_LIST_INITIALIZER(suspend_notifiers); 399 static NotifierList wakeup_notifiers = 400 NOTIFIER_LIST_INITIALIZER(wakeup_notifiers); 401 static NotifierList shutdown_notifiers = 402 NOTIFIER_LIST_INITIALIZER(shutdown_notifiers); 403 static uint32_t wakeup_reason_mask = ~(1 << QEMU_WAKEUP_REASON_NONE); 404 405 ShutdownCause qemu_shutdown_requested_get(void) 406 { 407 return shutdown_requested; 408 } 409 410 ShutdownCause qemu_reset_requested_get(void) 411 { 412 return reset_requested; 413 } 414 415 static int qemu_shutdown_requested(void) 416 { 417 return qatomic_xchg(&shutdown_requested, SHUTDOWN_CAUSE_NONE); 418 } 419 420 static void qemu_kill_report(void) 421 { 422 if (!qtest_driver() && shutdown_signal) { 423 if (shutdown_pid == 0) { 424 /* This happens for eg ^C at the terminal, so it's worth 425 * avoiding printing an odd message in that case. 426 */ 427 error_report("terminating on signal %d", shutdown_signal); 428 } else { 429 char *shutdown_cmd = qemu_get_pid_name(shutdown_pid); 430 431 error_report("terminating on signal %d from pid " FMT_pid " (%s)", 432 shutdown_signal, shutdown_pid, 433 shutdown_cmd ? shutdown_cmd : "<unknown process>"); 434 g_free(shutdown_cmd); 435 } 436 shutdown_signal = 0; 437 } 438 } 439 440 static ShutdownCause qemu_reset_requested(void) 441 { 442 ShutdownCause r = reset_requested; 443 444 if (r && replay_checkpoint(CHECKPOINT_RESET_REQUESTED)) { 445 reset_requested = SHUTDOWN_CAUSE_NONE; 446 return r; 447 } 448 return SHUTDOWN_CAUSE_NONE; 449 } 450 451 static int qemu_suspend_requested(void) 452 { 453 int r = suspend_requested; 454 if (r && replay_checkpoint(CHECKPOINT_SUSPEND_REQUESTED)) { 455 suspend_requested = 0; 456 return r; 457 } 458 return false; 459 } 460 461 static WakeupReason qemu_wakeup_requested(void) 462 { 463 return wakeup_reason; 464 } 465 466 static int qemu_powerdown_requested(void) 467 { 468 int r = powerdown_requested; 469 powerdown_requested = 0; 470 return r; 471 } 472 473 static int qemu_debug_requested(void) 474 { 475 int r = debug_requested; 476 debug_requested = 0; 477 return r; 478 } 479 480 /* 481 * Reset the VM. Issue an event unless @reason is SHUTDOWN_CAUSE_NONE. 482 */ 483 void qemu_system_reset(ShutdownCause reason) 484 { 485 MachineClass *mc; 486 487 mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; 488 489 cpu_synchronize_all_states(); 490 491 if (mc && mc->reset) { 492 mc->reset(current_machine, reason); 493 } else { 494 qemu_devices_reset(reason); 495 } 496 switch (reason) { 497 case SHUTDOWN_CAUSE_NONE: 498 case SHUTDOWN_CAUSE_SUBSYSTEM_RESET: 499 case SHUTDOWN_CAUSE_SNAPSHOT_LOAD: 500 break; 501 default: 502 qapi_event_send_reset(shutdown_caused_by_guest(reason), reason); 503 } 504 cpu_synchronize_all_post_reset(); 505 vm_set_suspended(false); 506 } 507 508 /* 509 * Wake the VM after suspend. 510 */ 511 static void qemu_system_wakeup(void) 512 { 513 MachineClass *mc; 514 515 mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; 516 517 if (mc && mc->wakeup) { 518 mc->wakeup(current_machine); 519 } 520 } 521 522 void qemu_system_guest_panicked(GuestPanicInformation *info) 523 { 524 qemu_log_mask(LOG_GUEST_ERROR, "Guest crashed"); 525 526 if (current_cpu) { 527 current_cpu->crash_occurred = true; 528 } 529 /* 530 * TODO: Currently the available panic actions are: none, pause, and 531 * shutdown, but in principle debug and reset could be supported as well. 532 * Investigate any potential use cases for the unimplemented actions. 533 */ 534 if (panic_action == PANIC_ACTION_PAUSE 535 || (panic_action == PANIC_ACTION_SHUTDOWN && shutdown_action == SHUTDOWN_ACTION_PAUSE)) { 536 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, info); 537 vm_stop(RUN_STATE_GUEST_PANICKED); 538 } else if (panic_action == PANIC_ACTION_SHUTDOWN || 539 panic_action == PANIC_ACTION_EXIT_FAILURE) { 540 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF, info); 541 vm_stop(RUN_STATE_GUEST_PANICKED); 542 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC); 543 } else { 544 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_RUN, info); 545 } 546 547 if (info) { 548 if (info->type == GUEST_PANIC_INFORMATION_TYPE_HYPER_V) { 549 qemu_log_mask(LOG_GUEST_ERROR, "\nHV crash parameters: (%#"PRIx64 550 " %#"PRIx64" %#"PRIx64" %#"PRIx64" %#"PRIx64")\n", 551 info->u.hyper_v.arg1, 552 info->u.hyper_v.arg2, 553 info->u.hyper_v.arg3, 554 info->u.hyper_v.arg4, 555 info->u.hyper_v.arg5); 556 } else if (info->type == GUEST_PANIC_INFORMATION_TYPE_S390) { 557 qemu_log_mask(LOG_GUEST_ERROR, " on cpu %d: %s\n" 558 "PSW: 0x%016" PRIx64 " 0x%016" PRIx64"\n", 559 info->u.s390.core, 560 S390CrashReason_str(info->u.s390.reason), 561 info->u.s390.psw_mask, 562 info->u.s390.psw_addr); 563 } 564 qapi_free_GuestPanicInformation(info); 565 } 566 } 567 568 void qemu_system_guest_crashloaded(GuestPanicInformation *info) 569 { 570 qemu_log_mask(LOG_GUEST_ERROR, "Guest crash loaded"); 571 qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN, info); 572 qapi_free_GuestPanicInformation(info); 573 } 574 575 void qemu_system_reset_request(ShutdownCause reason) 576 { 577 if (reboot_action == REBOOT_ACTION_SHUTDOWN && 578 reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { 579 shutdown_requested = reason; 580 } else if (!cpus_are_resettable()) { 581 error_report("cpus are not resettable, terminating"); 582 shutdown_requested = reason; 583 } else { 584 reset_requested = reason; 585 } 586 cpu_stop_current(); 587 qemu_notify_event(); 588 } 589 590 static void qemu_system_suspend(void) 591 { 592 pause_all_vcpus(); 593 notifier_list_notify(&suspend_notifiers, NULL); 594 runstate_set(RUN_STATE_SUSPENDED); 595 qapi_event_send_suspend(); 596 } 597 598 void qemu_system_suspend_request(void) 599 { 600 if (runstate_check(RUN_STATE_SUSPENDED)) { 601 return; 602 } 603 suspend_requested = 1; 604 cpu_stop_current(); 605 qemu_notify_event(); 606 } 607 608 void qemu_register_suspend_notifier(Notifier *notifier) 609 { 610 notifier_list_add(&suspend_notifiers, notifier); 611 } 612 613 void qemu_system_wakeup_request(WakeupReason reason, Error **errp) 614 { 615 trace_system_wakeup_request(reason); 616 617 if (!runstate_check(RUN_STATE_SUSPENDED)) { 618 error_setg(errp, 619 "Unable to wake up: guest is not in suspended state"); 620 return; 621 } 622 if (!(wakeup_reason_mask & (1 << reason))) { 623 return; 624 } 625 runstate_set(RUN_STATE_RUNNING); 626 wakeup_reason = reason; 627 qemu_notify_event(); 628 } 629 630 void qemu_system_wakeup_enable(WakeupReason reason, bool enabled) 631 { 632 if (enabled) { 633 wakeup_reason_mask |= (1 << reason); 634 } else { 635 wakeup_reason_mask &= ~(1 << reason); 636 } 637 } 638 639 void qemu_register_wakeup_notifier(Notifier *notifier) 640 { 641 notifier_list_add(&wakeup_notifiers, notifier); 642 } 643 644 static bool wakeup_suspend_enabled; 645 646 void qemu_register_wakeup_support(void) 647 { 648 wakeup_suspend_enabled = true; 649 } 650 651 bool qemu_wakeup_suspend_enabled(void) 652 { 653 return wakeup_suspend_enabled; 654 } 655 656 void qemu_system_killed(int signal, pid_t pid) 657 { 658 shutdown_signal = signal; 659 shutdown_pid = pid; 660 shutdown_action = SHUTDOWN_ACTION_POWEROFF; 661 662 /* Cannot call qemu_system_shutdown_request directly because 663 * we are in a signal handler. 664 */ 665 shutdown_requested = SHUTDOWN_CAUSE_HOST_SIGNAL; 666 qemu_notify_event(); 667 } 668 669 void qemu_system_shutdown_request_with_code(ShutdownCause reason, 670 int exit_code) 671 { 672 shutdown_exit_code = exit_code; 673 qemu_system_shutdown_request(reason); 674 } 675 676 void qemu_system_shutdown_request(ShutdownCause reason) 677 { 678 trace_qemu_system_shutdown_request(reason); 679 replay_shutdown_request(reason); 680 shutdown_requested = reason; 681 qemu_notify_event(); 682 } 683 684 static void qemu_system_powerdown(void) 685 { 686 qapi_event_send_powerdown(); 687 notifier_list_notify(&powerdown_notifiers, NULL); 688 } 689 690 static void qemu_system_shutdown(ShutdownCause cause) 691 { 692 qapi_event_send_shutdown(shutdown_caused_by_guest(cause), cause); 693 notifier_list_notify(&shutdown_notifiers, &cause); 694 } 695 696 void qemu_system_powerdown_request(void) 697 { 698 trace_qemu_system_powerdown_request(); 699 powerdown_requested = 1; 700 qemu_notify_event(); 701 } 702 703 void qemu_register_powerdown_notifier(Notifier *notifier) 704 { 705 notifier_list_add(&powerdown_notifiers, notifier); 706 } 707 708 void qemu_register_shutdown_notifier(Notifier *notifier) 709 { 710 notifier_list_add(&shutdown_notifiers, notifier); 711 } 712 713 void qemu_system_debug_request(void) 714 { 715 debug_requested = 1; 716 qemu_notify_event(); 717 } 718 719 static bool main_loop_should_exit(int *status) 720 { 721 RunState r; 722 ShutdownCause request; 723 724 if (qemu_debug_requested()) { 725 vm_stop(RUN_STATE_DEBUG); 726 } 727 if (qemu_suspend_requested()) { 728 qemu_system_suspend(); 729 } 730 request = qemu_shutdown_requested(); 731 if (request) { 732 qemu_kill_report(); 733 qemu_system_shutdown(request); 734 if (shutdown_action == SHUTDOWN_ACTION_PAUSE) { 735 vm_stop(RUN_STATE_SHUTDOWN); 736 } else { 737 if (shutdown_exit_code != EXIT_SUCCESS) { 738 *status = shutdown_exit_code; 739 } else if (request == SHUTDOWN_CAUSE_GUEST_PANIC && 740 panic_action == PANIC_ACTION_EXIT_FAILURE) { 741 *status = EXIT_FAILURE; 742 } 743 return true; 744 } 745 } 746 request = qemu_reset_requested(); 747 if (request) { 748 pause_all_vcpus(); 749 qemu_system_reset(request); 750 resume_all_vcpus(); 751 /* 752 * runstate can change in pause_all_vcpus() 753 * as iothread mutex is unlocked 754 */ 755 if (!runstate_check(RUN_STATE_RUNNING) && 756 !runstate_check(RUN_STATE_INMIGRATE) && 757 !runstate_check(RUN_STATE_FINISH_MIGRATE)) { 758 runstate_set(RUN_STATE_PRELAUNCH); 759 } 760 } 761 if (qemu_wakeup_requested()) { 762 pause_all_vcpus(); 763 qemu_system_wakeup(); 764 notifier_list_notify(&wakeup_notifiers, &wakeup_reason); 765 wakeup_reason = QEMU_WAKEUP_REASON_NONE; 766 resume_all_vcpus(); 767 qapi_event_send_wakeup(); 768 } 769 if (qemu_powerdown_requested()) { 770 qemu_system_powerdown(); 771 } 772 if (qemu_vmstop_requested(&r)) { 773 vm_stop(r); 774 } 775 return false; 776 } 777 778 int qemu_main_loop(void) 779 { 780 int status = EXIT_SUCCESS; 781 782 while (!main_loop_should_exit(&status)) { 783 main_loop_wait(false); 784 } 785 786 return status; 787 } 788 789 void qemu_add_exit_notifier(Notifier *notify) 790 { 791 notifier_list_add(&exit_notifiers, notify); 792 } 793 794 void qemu_remove_exit_notifier(Notifier *notify) 795 { 796 notifier_remove(notify); 797 } 798 799 static void qemu_run_exit_notifiers(void) 800 { 801 notifier_list_notify(&exit_notifiers, NULL); 802 } 803 804 void qemu_init_subsystems(void) 805 { 806 Error *err = NULL; 807 808 os_set_line_buffering(); 809 810 module_call_init(MODULE_INIT_TRACE); 811 812 qemu_init_cpu_list(); 813 qemu_init_cpu_loop(); 814 bql_lock(); 815 816 atexit(qemu_run_exit_notifiers); 817 818 module_call_init(MODULE_INIT_QOM); 819 module_call_init(MODULE_INIT_MIGRATION); 820 821 runstate_init(); 822 precopy_infrastructure_init(); 823 postcopy_infrastructure_init(); 824 monitor_init_globals(); 825 826 if (qcrypto_init(&err) < 0) { 827 error_reportf_err(err, "cannot initialize crypto: "); 828 exit(1); 829 } 830 831 os_setup_early_signal_handling(); 832 833 bdrv_init_with_whitelist(); 834 socket_init(); 835 } 836 837 838 void qemu_cleanup(int status) 839 { 840 gdb_exit(status); 841 842 /* 843 * cleaning up the migration object cancels any existing migration 844 * try to do this early so that it also stops using devices. 845 */ 846 migration_shutdown(); 847 848 /* 849 * Close the exports before draining the block layer. The export 850 * drivers may have coroutines yielding on it, so we need to clean 851 * them up before the drain, as otherwise they may be get stuck in 852 * blk_wait_while_drained(). 853 */ 854 blk_exp_close_all(); 855 856 857 /* No more vcpu or device emulation activity beyond this point */ 858 vm_shutdown(); 859 replay_finish(); 860 861 /* 862 * We must cancel all block jobs while the block layer is drained, 863 * or cancelling will be affected by throttling and thus may block 864 * for an extended period of time. 865 * Begin the drained section after vm_shutdown() to avoid requests being 866 * stuck in the BlockBackend's request queue. 867 * We do not need to end this section, because we do not want any 868 * requests happening from here on anyway. 869 */ 870 bdrv_drain_all_begin(); 871 job_cancel_sync_all(); 872 bdrv_close_all(); 873 874 /* vhost-user must be cleaned up before chardevs. */ 875 tpm_cleanup(); 876 net_cleanup(); 877 audio_cleanup(); 878 monitor_cleanup(); 879 qemu_chr_cleanup(); 880 user_creatable_cleanup(); 881 /* TODO: unref root container, check all devices are ok */ 882 } 883