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 } 504 505 /* 506 * Some boards use the machine reset callback to point CPUs to the firmware 507 * entry point. Assume that this is not the case for boards that support 508 * non-resettable CPUs (currently used only for confidential guests), in 509 * which case cpu_synchronize_all_post_init() is enough because 510 * it does _more_ than cpu_synchronize_all_post_reset(). 511 */ 512 if (cpus_are_resettable()) { 513 cpu_synchronize_all_post_reset(); 514 } else { 515 assert(runstate_check(RUN_STATE_PRELAUNCH)); 516 } 517 518 vm_set_suspended(false); 519 } 520 521 /* 522 * Wake the VM after suspend. 523 */ 524 static void qemu_system_wakeup(void) 525 { 526 MachineClass *mc; 527 528 mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; 529 530 if (mc && mc->wakeup) { 531 mc->wakeup(current_machine); 532 } 533 } 534 535 void qemu_system_guest_panicked(GuestPanicInformation *info) 536 { 537 qemu_log_mask(LOG_GUEST_ERROR, "Guest crashed"); 538 539 if (current_cpu) { 540 current_cpu->crash_occurred = true; 541 } 542 /* 543 * TODO: Currently the available panic actions are: none, pause, and 544 * shutdown, but in principle debug and reset could be supported as well. 545 * Investigate any potential use cases for the unimplemented actions. 546 */ 547 if (panic_action == PANIC_ACTION_PAUSE 548 || (panic_action == PANIC_ACTION_SHUTDOWN && shutdown_action == SHUTDOWN_ACTION_PAUSE)) { 549 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, info); 550 vm_stop(RUN_STATE_GUEST_PANICKED); 551 } else if (panic_action == PANIC_ACTION_SHUTDOWN || 552 panic_action == PANIC_ACTION_EXIT_FAILURE) { 553 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF, info); 554 vm_stop(RUN_STATE_GUEST_PANICKED); 555 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC); 556 } else { 557 qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_RUN, info); 558 } 559 560 if (info) { 561 if (info->type == GUEST_PANIC_INFORMATION_TYPE_HYPER_V) { 562 qemu_log_mask(LOG_GUEST_ERROR, "\nHV crash parameters: (%#"PRIx64 563 " %#"PRIx64" %#"PRIx64" %#"PRIx64" %#"PRIx64")\n", 564 info->u.hyper_v.arg1, 565 info->u.hyper_v.arg2, 566 info->u.hyper_v.arg3, 567 info->u.hyper_v.arg4, 568 info->u.hyper_v.arg5); 569 } else if (info->type == GUEST_PANIC_INFORMATION_TYPE_S390) { 570 qemu_log_mask(LOG_GUEST_ERROR, " on cpu %d: %s\n" 571 "PSW: 0x%016" PRIx64 " 0x%016" PRIx64"\n", 572 info->u.s390.core, 573 S390CrashReason_str(info->u.s390.reason), 574 info->u.s390.psw_mask, 575 info->u.s390.psw_addr); 576 } 577 qapi_free_GuestPanicInformation(info); 578 } 579 } 580 581 void qemu_system_guest_crashloaded(GuestPanicInformation *info) 582 { 583 qemu_log_mask(LOG_GUEST_ERROR, "Guest crash loaded"); 584 qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN, info); 585 qapi_free_GuestPanicInformation(info); 586 } 587 588 void qemu_system_reset_request(ShutdownCause reason) 589 { 590 if (reboot_action == REBOOT_ACTION_SHUTDOWN && 591 reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { 592 shutdown_requested = reason; 593 } else if (!cpus_are_resettable()) { 594 error_report("cpus are not resettable, terminating"); 595 shutdown_requested = reason; 596 } else { 597 reset_requested = reason; 598 } 599 cpu_stop_current(); 600 qemu_notify_event(); 601 } 602 603 static void qemu_system_suspend(void) 604 { 605 pause_all_vcpus(); 606 notifier_list_notify(&suspend_notifiers, NULL); 607 runstate_set(RUN_STATE_SUSPENDED); 608 qapi_event_send_suspend(); 609 } 610 611 void qemu_system_suspend_request(void) 612 { 613 if (runstate_check(RUN_STATE_SUSPENDED)) { 614 return; 615 } 616 suspend_requested = 1; 617 cpu_stop_current(); 618 qemu_notify_event(); 619 } 620 621 void qemu_register_suspend_notifier(Notifier *notifier) 622 { 623 notifier_list_add(&suspend_notifiers, notifier); 624 } 625 626 void qemu_system_wakeup_request(WakeupReason reason, Error **errp) 627 { 628 trace_system_wakeup_request(reason); 629 630 if (!runstate_check(RUN_STATE_SUSPENDED)) { 631 error_setg(errp, 632 "Unable to wake up: guest is not in suspended state"); 633 return; 634 } 635 if (!(wakeup_reason_mask & (1 << reason))) { 636 return; 637 } 638 runstate_set(RUN_STATE_RUNNING); 639 wakeup_reason = reason; 640 qemu_notify_event(); 641 } 642 643 void qemu_system_wakeup_enable(WakeupReason reason, bool enabled) 644 { 645 if (enabled) { 646 wakeup_reason_mask |= (1 << reason); 647 } else { 648 wakeup_reason_mask &= ~(1 << reason); 649 } 650 } 651 652 void qemu_register_wakeup_notifier(Notifier *notifier) 653 { 654 notifier_list_add(&wakeup_notifiers, notifier); 655 } 656 657 static bool wakeup_suspend_enabled; 658 659 void qemu_register_wakeup_support(void) 660 { 661 wakeup_suspend_enabled = true; 662 } 663 664 bool qemu_wakeup_suspend_enabled(void) 665 { 666 return wakeup_suspend_enabled; 667 } 668 669 void qemu_system_killed(int signal, pid_t pid) 670 { 671 shutdown_signal = signal; 672 shutdown_pid = pid; 673 shutdown_action = SHUTDOWN_ACTION_POWEROFF; 674 675 /* Cannot call qemu_system_shutdown_request directly because 676 * we are in a signal handler. 677 */ 678 shutdown_requested = SHUTDOWN_CAUSE_HOST_SIGNAL; 679 qemu_notify_event(); 680 } 681 682 void qemu_system_shutdown_request_with_code(ShutdownCause reason, 683 int exit_code) 684 { 685 shutdown_exit_code = exit_code; 686 qemu_system_shutdown_request(reason); 687 } 688 689 void qemu_system_shutdown_request(ShutdownCause reason) 690 { 691 trace_qemu_system_shutdown_request(reason); 692 replay_shutdown_request(reason); 693 shutdown_requested = reason; 694 qemu_notify_event(); 695 } 696 697 static void qemu_system_powerdown(void) 698 { 699 qapi_event_send_powerdown(); 700 notifier_list_notify(&powerdown_notifiers, NULL); 701 } 702 703 static void qemu_system_shutdown(ShutdownCause cause) 704 { 705 qapi_event_send_shutdown(shutdown_caused_by_guest(cause), cause); 706 notifier_list_notify(&shutdown_notifiers, &cause); 707 } 708 709 void qemu_system_powerdown_request(void) 710 { 711 trace_qemu_system_powerdown_request(); 712 powerdown_requested = 1; 713 qemu_notify_event(); 714 } 715 716 void qemu_register_powerdown_notifier(Notifier *notifier) 717 { 718 notifier_list_add(&powerdown_notifiers, notifier); 719 } 720 721 void qemu_register_shutdown_notifier(Notifier *notifier) 722 { 723 notifier_list_add(&shutdown_notifiers, notifier); 724 } 725 726 void qemu_system_debug_request(void) 727 { 728 debug_requested = 1; 729 qemu_notify_event(); 730 } 731 732 static bool main_loop_should_exit(int *status) 733 { 734 RunState r; 735 ShutdownCause request; 736 737 if (qemu_debug_requested()) { 738 vm_stop(RUN_STATE_DEBUG); 739 } 740 if (qemu_suspend_requested()) { 741 qemu_system_suspend(); 742 } 743 request = qemu_shutdown_requested(); 744 if (request) { 745 qemu_kill_report(); 746 qemu_system_shutdown(request); 747 if (shutdown_action == SHUTDOWN_ACTION_PAUSE) { 748 vm_stop(RUN_STATE_SHUTDOWN); 749 } else { 750 if (shutdown_exit_code != EXIT_SUCCESS) { 751 *status = shutdown_exit_code; 752 } else if (request == SHUTDOWN_CAUSE_GUEST_PANIC && 753 panic_action == PANIC_ACTION_EXIT_FAILURE) { 754 *status = EXIT_FAILURE; 755 } 756 return true; 757 } 758 } 759 request = qemu_reset_requested(); 760 if (request) { 761 pause_all_vcpus(); 762 qemu_system_reset(request); 763 resume_all_vcpus(); 764 /* 765 * runstate can change in pause_all_vcpus() 766 * as iothread mutex is unlocked 767 */ 768 if (!runstate_check(RUN_STATE_RUNNING) && 769 !runstate_check(RUN_STATE_INMIGRATE) && 770 !runstate_check(RUN_STATE_FINISH_MIGRATE)) { 771 runstate_set(RUN_STATE_PRELAUNCH); 772 } 773 } 774 if (qemu_wakeup_requested()) { 775 pause_all_vcpus(); 776 qemu_system_wakeup(); 777 notifier_list_notify(&wakeup_notifiers, &wakeup_reason); 778 wakeup_reason = QEMU_WAKEUP_REASON_NONE; 779 resume_all_vcpus(); 780 qapi_event_send_wakeup(); 781 } 782 if (qemu_powerdown_requested()) { 783 qemu_system_powerdown(); 784 } 785 if (qemu_vmstop_requested(&r)) { 786 vm_stop(r); 787 } 788 return false; 789 } 790 791 int qemu_main_loop(void) 792 { 793 int status = EXIT_SUCCESS; 794 795 while (!main_loop_should_exit(&status)) { 796 main_loop_wait(false); 797 } 798 799 return status; 800 } 801 802 void qemu_add_exit_notifier(Notifier *notify) 803 { 804 notifier_list_add(&exit_notifiers, notify); 805 } 806 807 void qemu_remove_exit_notifier(Notifier *notify) 808 { 809 notifier_remove(notify); 810 } 811 812 static void qemu_run_exit_notifiers(void) 813 { 814 notifier_list_notify(&exit_notifiers, NULL); 815 } 816 817 void qemu_init_subsystems(void) 818 { 819 Error *err = NULL; 820 821 os_set_line_buffering(); 822 823 module_call_init(MODULE_INIT_TRACE); 824 825 qemu_init_cpu_list(); 826 qemu_init_cpu_loop(); 827 bql_lock(); 828 829 atexit(qemu_run_exit_notifiers); 830 831 module_call_init(MODULE_INIT_QOM); 832 module_call_init(MODULE_INIT_MIGRATION); 833 834 runstate_init(); 835 precopy_infrastructure_init(); 836 postcopy_infrastructure_init(); 837 monitor_init_globals(); 838 839 if (qcrypto_init(&err) < 0) { 840 error_reportf_err(err, "cannot initialize crypto: "); 841 exit(1); 842 } 843 844 os_setup_early_signal_handling(); 845 846 bdrv_init_with_whitelist(); 847 socket_init(); 848 } 849 850 851 void qemu_cleanup(int status) 852 { 853 gdb_exit(status); 854 855 /* 856 * cleaning up the migration object cancels any existing migration 857 * try to do this early so that it also stops using devices. 858 */ 859 migration_shutdown(); 860 861 /* 862 * Close the exports before draining the block layer. The export 863 * drivers may have coroutines yielding on it, so we need to clean 864 * them up before the drain, as otherwise they may be get stuck in 865 * blk_wait_while_drained(). 866 */ 867 blk_exp_close_all(); 868 869 870 /* No more vcpu or device emulation activity beyond this point */ 871 vm_shutdown(); 872 replay_finish(); 873 874 /* 875 * We must cancel all block jobs while the block layer is drained, 876 * or cancelling will be affected by throttling and thus may block 877 * for an extended period of time. 878 * Begin the drained section after vm_shutdown() to avoid requests being 879 * stuck in the BlockBackend's request queue. 880 * We do not need to end this section, because we do not want any 881 * requests happening from here on anyway. 882 */ 883 bdrv_drain_all_begin(); 884 job_cancel_sync_all(); 885 bdrv_close_all(); 886 887 /* vhost-user must be cleaned up before chardevs. */ 888 tpm_cleanup(); 889 net_cleanup(); 890 audio_cleanup(); 891 monitor_cleanup(); 892 qemu_chr_cleanup(); 893 user_creatable_cleanup(); 894 /* TODO: unref root container, check all devices are ok */ 895 } 896