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Commit | Line | Data |
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296af7c9 BS |
1 | /* |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
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 | ||
7b31bbc2 | 25 | #include "qemu/osdep.h" |
83c9089e | 26 | #include "monitor/monitor.h" |
d5d2b15e | 27 | #include "qemu/coroutine-tls.h" |
e688df6b | 28 | #include "qapi/error.h" |
df7a1f48 | 29 | #include "qapi/qapi-commands-machine.h" |
112ed241 | 30 | #include "qapi/qapi-commands-misc.h" |
9af23989 | 31 | #include "qapi/qapi-events-run-state.h" |
a4e15de9 | 32 | #include "qapi/qmp/qerror.h" |
022c62cb | 33 | #include "exec/gdbstub.h" |
b3946626 | 34 | #include "sysemu/hw_accel.h" |
73842ef0 | 35 | #include "exec/cpu-common.h" |
1de7afc9 | 36 | #include "qemu/thread.h" |
e2c1c34f | 37 | #include "qemu/main-loop.h" |
30865f31 | 38 | #include "qemu/plugin.h" |
9c17d615 | 39 | #include "sysemu/cpus.h" |
9c09a251 | 40 | #include "qemu/guest-random.h" |
9cb805fd | 41 | #include "hw/nmi.h" |
8b427044 | 42 | #include "sysemu/replay.h" |
54d31236 | 43 | #include "sysemu/runstate.h" |
740b1759 | 44 | #include "sysemu/cpu-timers.h" |
faf20793 | 45 | #include "sysemu/whpx.h" |
5cc8767d | 46 | #include "hw/boards.h" |
650d103d | 47 | #include "hw/hw.h" |
8af3f5c6 | 48 | #include "trace.h" |
0ff0fc19 | 49 | |
6d9cb73c JK |
50 | #ifdef CONFIG_LINUX |
51 | ||
52 | #include <sys/prctl.h> | |
53 | ||
c0532a76 MT |
54 | #ifndef PR_MCE_KILL |
55 | #define PR_MCE_KILL 33 | |
56 | #endif | |
57 | ||
6d9cb73c JK |
58 | #ifndef PR_MCE_KILL_SET |
59 | #define PR_MCE_KILL_SET 1 | |
60 | #endif | |
61 | ||
62 | #ifndef PR_MCE_KILL_EARLY | |
63 | #define PR_MCE_KILL_EARLY 1 | |
64 | #endif | |
65 | ||
66 | #endif /* CONFIG_LINUX */ | |
67 | ||
bd1f7ff4 YK |
68 | static QemuMutex qemu_global_mutex; |
69 | ||
5f74af8b PMD |
70 | /* |
71 | * The chosen accelerator is supposed to register this. | |
72 | */ | |
73 | static const AccelOpsClass *cpus_accel; | |
74 | ||
321bc0b2 TC |
75 | bool cpu_is_stopped(CPUState *cpu) |
76 | { | |
77 | return cpu->stopped || !runstate_is_running(); | |
78 | } | |
79 | ||
430065da | 80 | bool cpu_work_list_empty(CPUState *cpu) |
0c0fcc20 | 81 | { |
25e82fb7 | 82 | return QSIMPLEQ_EMPTY_ATOMIC(&cpu->work_list); |
0c0fcc20 EC |
83 | } |
84 | ||
430065da | 85 | bool cpu_thread_is_idle(CPUState *cpu) |
ac873f1e | 86 | { |
0c0fcc20 | 87 | if (cpu->stop || !cpu_work_list_empty(cpu)) { |
ac873f1e PM |
88 | return false; |
89 | } | |
321bc0b2 | 90 | if (cpu_is_stopped(cpu)) { |
ac873f1e PM |
91 | return true; |
92 | } | |
ad7d684d | 93 | if (!cpu->halted || cpu_has_work(cpu)) { |
ac873f1e PM |
94 | return false; |
95 | } | |
ad7d684d PMD |
96 | if (cpus_accel->cpu_thread_is_idle) { |
97 | return cpus_accel->cpu_thread_is_idle(cpu); | |
98 | } | |
ac873f1e PM |
99 | return true; |
100 | } | |
101 | ||
740b1759 | 102 | bool all_cpu_threads_idle(void) |
ac873f1e | 103 | { |
182735ef | 104 | CPUState *cpu; |
ac873f1e | 105 | |
bdc44640 | 106 | CPU_FOREACH(cpu) { |
182735ef | 107 | if (!cpu_thread_is_idle(cpu)) { |
ac873f1e PM |
108 | return false; |
109 | } | |
110 | } | |
111 | return true; | |
112 | } | |
113 | ||
296af7c9 BS |
114 | /***********************************************************/ |
115 | void hw_error(const char *fmt, ...) | |
116 | { | |
117 | va_list ap; | |
55e5c285 | 118 | CPUState *cpu; |
296af7c9 BS |
119 | |
120 | va_start(ap, fmt); | |
121 | fprintf(stderr, "qemu: hardware error: "); | |
122 | vfprintf(stderr, fmt, ap); | |
123 | fprintf(stderr, "\n"); | |
bdc44640 | 124 | CPU_FOREACH(cpu) { |
55e5c285 | 125 | fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); |
90c84c56 | 126 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU); |
296af7c9 BS |
127 | } |
128 | va_end(ap); | |
129 | abort(); | |
130 | } | |
131 | ||
132 | void cpu_synchronize_all_states(void) | |
133 | { | |
182735ef | 134 | CPUState *cpu; |
296af7c9 | 135 | |
bdc44640 | 136 | CPU_FOREACH(cpu) { |
182735ef | 137 | cpu_synchronize_state(cpu); |
296af7c9 BS |
138 | } |
139 | } | |
140 | ||
141 | void cpu_synchronize_all_post_reset(void) | |
142 | { | |
182735ef | 143 | CPUState *cpu; |
296af7c9 | 144 | |
bdc44640 | 145 | CPU_FOREACH(cpu) { |
182735ef | 146 | cpu_synchronize_post_reset(cpu); |
296af7c9 BS |
147 | } |
148 | } | |
149 | ||
150 | void cpu_synchronize_all_post_init(void) | |
151 | { | |
182735ef | 152 | CPUState *cpu; |
296af7c9 | 153 | |
bdc44640 | 154 | CPU_FOREACH(cpu) { |
182735ef | 155 | cpu_synchronize_post_init(cpu); |
296af7c9 BS |
156 | } |
157 | } | |
158 | ||
75e972da DG |
159 | void cpu_synchronize_all_pre_loadvm(void) |
160 | { | |
161 | CPUState *cpu; | |
162 | ||
163 | CPU_FOREACH(cpu) { | |
164 | cpu_synchronize_pre_loadvm(cpu); | |
165 | } | |
166 | } | |
167 | ||
430065da CF |
168 | void cpu_synchronize_state(CPUState *cpu) |
169 | { | |
994aa172 | 170 | if (cpus_accel->synchronize_state) { |
430065da CF |
171 | cpus_accel->synchronize_state(cpu); |
172 | } | |
430065da CF |
173 | } |
174 | ||
175 | void cpu_synchronize_post_reset(CPUState *cpu) | |
176 | { | |
994aa172 | 177 | if (cpus_accel->synchronize_post_reset) { |
430065da CF |
178 | cpus_accel->synchronize_post_reset(cpu); |
179 | } | |
430065da CF |
180 | } |
181 | ||
182 | void cpu_synchronize_post_init(CPUState *cpu) | |
183 | { | |
994aa172 | 184 | if (cpus_accel->synchronize_post_init) { |
430065da CF |
185 | cpus_accel->synchronize_post_init(cpu); |
186 | } | |
430065da CF |
187 | } |
188 | ||
189 | void cpu_synchronize_pre_loadvm(CPUState *cpu) | |
190 | { | |
994aa172 | 191 | if (cpus_accel->synchronize_pre_loadvm) { |
430065da CF |
192 | cpus_accel->synchronize_pre_loadvm(cpu); |
193 | } | |
430065da CF |
194 | } |
195 | ||
92a5199b TL |
196 | bool cpus_are_resettable(void) |
197 | { | |
39196355 PMD |
198 | if (cpus_accel->cpus_are_resettable) { |
199 | return cpus_accel->cpus_are_resettable(); | |
200 | } | |
201 | return true; | |
92a5199b TL |
202 | } |
203 | ||
430065da CF |
204 | int64_t cpus_get_virtual_clock(void) |
205 | { | |
994aa172 CF |
206 | /* |
207 | * XXX | |
208 | * | |
209 | * need to check that cpus_accel is not NULL, because qcow2 calls | |
210 | * qemu_get_clock_ns(CLOCK_VIRTUAL) without any accel initialized and | |
211 | * with ticks disabled in some io-tests: | |
212 | * 030 040 041 060 099 120 127 140 156 161 172 181 191 192 195 203 229 249 256 267 | |
213 | * | |
214 | * is this expected? | |
215 | * | |
216 | * XXX | |
217 | */ | |
430065da CF |
218 | if (cpus_accel && cpus_accel->get_virtual_clock) { |
219 | return cpus_accel->get_virtual_clock(); | |
220 | } | |
430065da CF |
221 | return cpu_get_clock(); |
222 | } | |
223 | ||
224 | /* | |
225 | * return the time elapsed in VM between vm_start and vm_stop. Unless | |
226 | * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU cycle | |
227 | * counter. | |
228 | */ | |
229 | int64_t cpus_get_elapsed_ticks(void) | |
230 | { | |
994aa172 | 231 | if (cpus_accel->get_elapsed_ticks) { |
430065da CF |
232 | return cpus_accel->get_elapsed_ticks(); |
233 | } | |
430065da CF |
234 | return cpu_get_ticks(); |
235 | } | |
236 | ||
bb4776be CF |
237 | static void generic_handle_interrupt(CPUState *cpu, int mask) |
238 | { | |
239 | cpu->interrupt_request |= mask; | |
240 | ||
241 | if (!qemu_cpu_is_self(cpu)) { | |
242 | qemu_cpu_kick(cpu); | |
243 | } | |
244 | } | |
245 | ||
246 | void cpu_interrupt(CPUState *cpu, int mask) | |
247 | { | |
248 | if (cpus_accel->handle_interrupt) { | |
249 | cpus_accel->handle_interrupt(cpu, mask); | |
250 | } else { | |
251 | generic_handle_interrupt(cpu, mask); | |
252 | } | |
253 | } | |
254 | ||
4486e89c | 255 | static int do_vm_stop(RunState state, bool send_stop) |
296af7c9 | 256 | { |
56983463 KW |
257 | int ret = 0; |
258 | ||
1354869c | 259 | if (runstate_is_running()) { |
f962cac4 | 260 | runstate_set(state); |
296af7c9 | 261 | cpu_disable_ticks(); |
296af7c9 | 262 | pause_all_vcpus(); |
1dfb4dd9 | 263 | vm_state_notify(0, state); |
4486e89c | 264 | if (send_stop) { |
3ab72385 | 265 | qapi_event_send_stop(); |
4486e89c | 266 | } |
296af7c9 | 267 | } |
56983463 | 268 | |
594a45ce | 269 | bdrv_drain_all(); |
22af08ea | 270 | ret = bdrv_flush_all(); |
8af3f5c6 | 271 | trace_vm_stop_flush_all(ret); |
594a45ce | 272 | |
56983463 | 273 | return ret; |
296af7c9 BS |
274 | } |
275 | ||
4486e89c SH |
276 | /* Special vm_stop() variant for terminating the process. Historically clients |
277 | * did not expect a QMP STOP event and so we need to retain compatibility. | |
278 | */ | |
279 | int vm_shutdown(void) | |
280 | { | |
281 | return do_vm_stop(RUN_STATE_SHUTDOWN, false); | |
282 | } | |
283 | ||
430065da | 284 | bool cpu_can_run(CPUState *cpu) |
296af7c9 | 285 | { |
4fdeee7c | 286 | if (cpu->stop) { |
a1fcaa73 | 287 | return false; |
0ab07c62 | 288 | } |
321bc0b2 | 289 | if (cpu_is_stopped(cpu)) { |
a1fcaa73 | 290 | return false; |
0ab07c62 | 291 | } |
a1fcaa73 | 292 | return true; |
296af7c9 BS |
293 | } |
294 | ||
430065da | 295 | void cpu_handle_guest_debug(CPUState *cpu) |
83f338f7 | 296 | { |
fda8458b PD |
297 | if (replay_running_debug()) { |
298 | if (!cpu->singlestep_enabled) { | |
cda38259 PD |
299 | /* |
300 | * Report about the breakpoint and | |
301 | * make a single step to skip it | |
302 | */ | |
303 | replay_breakpoint(); | |
fda8458b PD |
304 | cpu_single_step(cpu, SSTEP_ENABLE); |
305 | } else { | |
306 | cpu_single_step(cpu, 0); | |
307 | } | |
308 | } else { | |
309 | gdb_set_stop_cpu(cpu); | |
310 | qemu_system_debug_request(); | |
311 | cpu->stopped = true; | |
312 | } | |
3c638d06 JK |
313 | } |
314 | ||
6d9cb73c JK |
315 | #ifdef CONFIG_LINUX |
316 | static void sigbus_reraise(void) | |
317 | { | |
318 | sigset_t set; | |
319 | struct sigaction action; | |
320 | ||
321 | memset(&action, 0, sizeof(action)); | |
322 | action.sa_handler = SIG_DFL; | |
323 | if (!sigaction(SIGBUS, &action, NULL)) { | |
324 | raise(SIGBUS); | |
325 | sigemptyset(&set); | |
326 | sigaddset(&set, SIGBUS); | |
a2d1761d | 327 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); |
6d9cb73c | 328 | } |
eb1960aa | 329 | perror("Failed to re-raise SIGBUS!"); |
6d9cb73c JK |
330 | abort(); |
331 | } | |
332 | ||
d98d4072 | 333 | static void sigbus_handler(int n, siginfo_t *siginfo, void *ctx) |
6d9cb73c | 334 | { |
a16fc07e PB |
335 | if (siginfo->si_code != BUS_MCEERR_AO && siginfo->si_code != BUS_MCEERR_AR) { |
336 | sigbus_reraise(); | |
337 | } | |
338 | ||
2ae41db2 PB |
339 | if (current_cpu) { |
340 | /* Called asynchronously in VCPU thread. */ | |
341 | if (kvm_on_sigbus_vcpu(current_cpu, siginfo->si_code, siginfo->si_addr)) { | |
342 | sigbus_reraise(); | |
343 | } | |
344 | } else { | |
345 | /* Called synchronously (via signalfd) in main thread. */ | |
346 | if (kvm_on_sigbus(siginfo->si_code, siginfo->si_addr)) { | |
347 | sigbus_reraise(); | |
348 | } | |
6d9cb73c JK |
349 | } |
350 | } | |
351 | ||
352 | static void qemu_init_sigbus(void) | |
353 | { | |
354 | struct sigaction action; | |
355 | ||
29b838c0 DH |
356 | /* |
357 | * ALERT: when modifying this, take care that SIGBUS forwarding in | |
6556aadc | 358 | * qemu_prealloc_mem() will continue working as expected. |
29b838c0 | 359 | */ |
6d9cb73c JK |
360 | memset(&action, 0, sizeof(action)); |
361 | action.sa_flags = SA_SIGINFO; | |
d98d4072 | 362 | action.sa_sigaction = sigbus_handler; |
6d9cb73c JK |
363 | sigaction(SIGBUS, &action, NULL); |
364 | ||
365 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
366 | } | |
6d9cb73c | 367 | #else /* !CONFIG_LINUX */ |
6d9cb73c JK |
368 | static void qemu_init_sigbus(void) |
369 | { | |
370 | } | |
a16fc07e | 371 | #endif /* !CONFIG_LINUX */ |
ff48eb5f | 372 | |
296af7c9 BS |
373 | static QemuThread io_thread; |
374 | ||
296af7c9 BS |
375 | /* cpu creation */ |
376 | static QemuCond qemu_cpu_cond; | |
377 | /* system init */ | |
296af7c9 BS |
378 | static QemuCond qemu_pause_cond; |
379 | ||
d3b12f5d | 380 | void qemu_init_cpu_loop(void) |
296af7c9 | 381 | { |
6d9cb73c | 382 | qemu_init_sigbus(); |
ed94592b | 383 | qemu_cond_init(&qemu_cpu_cond); |
ed94592b | 384 | qemu_cond_init(&qemu_pause_cond); |
296af7c9 | 385 | qemu_mutex_init(&qemu_global_mutex); |
296af7c9 | 386 | |
b7680cb6 | 387 | qemu_thread_get_self(&io_thread); |
296af7c9 BS |
388 | } |
389 | ||
14e6fe12 | 390 | void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) |
e82bcec2 | 391 | { |
d148d90e | 392 | do_run_on_cpu(cpu, func, data, &qemu_global_mutex); |
3c02270d CV |
393 | } |
394 | ||
ebd05fea DH |
395 | static void qemu_cpu_stop(CPUState *cpu, bool exit) |
396 | { | |
397 | g_assert(qemu_cpu_is_self(cpu)); | |
398 | cpu->stop = false; | |
399 | cpu->stopped = true; | |
400 | if (exit) { | |
401 | cpu_exit(cpu); | |
402 | } | |
403 | qemu_cond_broadcast(&qemu_pause_cond); | |
404 | } | |
405 | ||
430065da | 406 | void qemu_wait_io_event_common(CPUState *cpu) |
296af7c9 | 407 | { |
06831001 | 408 | qatomic_set_mb(&cpu->thread_kicked, false); |
4fdeee7c | 409 | if (cpu->stop) { |
ebd05fea | 410 | qemu_cpu_stop(cpu, false); |
296af7c9 | 411 | } |
a5403c69 | 412 | process_queued_cpu_work(cpu); |
37257942 AB |
413 | } |
414 | ||
430065da | 415 | void qemu_wait_io_event(CPUState *cpu) |
296af7c9 | 416 | { |
30865f31 EC |
417 | bool slept = false; |
418 | ||
a98ae1d8 | 419 | while (cpu_thread_is_idle(cpu)) { |
30865f31 EC |
420 | if (!slept) { |
421 | slept = true; | |
422 | qemu_plugin_vcpu_idle_cb(cpu); | |
423 | } | |
f5c121b8 | 424 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); |
16400322 | 425 | } |
30865f31 EC |
426 | if (slept) { |
427 | qemu_plugin_vcpu_resume_cb(cpu); | |
428 | } | |
296af7c9 | 429 | |
c97d6d2c SAGDR |
430 | qemu_wait_io_event_common(cpu); |
431 | } | |
432 | ||
430065da | 433 | void cpus_kick_thread(CPUState *cpu) |
cc015e9a | 434 | { |
e0c38211 PB |
435 | if (cpu->thread_kicked) { |
436 | return; | |
9102deda | 437 | } |
e0c38211 | 438 | cpu->thread_kicked = true; |
c9923550 XC |
439 | |
440 | #ifndef _WIN32 | |
441 | int err = pthread_kill(cpu->thread->thread, SIG_IPI); | |
d455ebc4 | 442 | if (err && err != ESRCH) { |
cc015e9a PB |
443 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); |
444 | exit(1); | |
445 | } | |
c9923550 XC |
446 | #else |
447 | qemu_sem_post(&cpu->sem); | |
e0c38211 PB |
448 | #endif |
449 | } | |
ed9164a3 | 450 | |
c08d7424 | 451 | void qemu_cpu_kick(CPUState *cpu) |
296af7c9 | 452 | { |
f5c121b8 | 453 | qemu_cond_broadcast(cpu->halt_cond); |
994aa172 | 454 | if (cpus_accel->kick_vcpu_thread) { |
430065da | 455 | cpus_accel->kick_vcpu_thread(cpu); |
e92558e4 | 456 | } else { /* default */ |
430065da | 457 | cpus_kick_thread(cpu); |
e0c38211 | 458 | } |
296af7c9 BS |
459 | } |
460 | ||
46d62fac | 461 | void qemu_cpu_kick_self(void) |
296af7c9 | 462 | { |
4917cf44 | 463 | assert(current_cpu); |
430065da | 464 | cpus_kick_thread(current_cpu); |
296af7c9 BS |
465 | } |
466 | ||
60e82579 | 467 | bool qemu_cpu_is_self(CPUState *cpu) |
296af7c9 | 468 | { |
814e612e | 469 | return qemu_thread_is_self(cpu->thread); |
296af7c9 BS |
470 | } |
471 | ||
79e2b9ae | 472 | bool qemu_in_vcpu_thread(void) |
aa723c23 | 473 | { |
4917cf44 | 474 | return current_cpu && qemu_cpu_is_self(current_cpu); |
aa723c23 JQ |
475 | } |
476 | ||
d5d2b15e | 477 | QEMU_DEFINE_STATIC_CO_TLS(bool, iothread_locked) |
afbe7053 PB |
478 | |
479 | bool qemu_mutex_iothread_locked(void) | |
480 | { | |
d5d2b15e | 481 | return get_iothread_locked(); |
afbe7053 PB |
482 | } |
483 | ||
6538692e EGE |
484 | bool qemu_in_main_thread(void) |
485 | { | |
486 | return qemu_mutex_iothread_locked(); | |
487 | } | |
488 | ||
cb764d06 EC |
489 | /* |
490 | * The BQL is taken from so many places that it is worth profiling the | |
491 | * callers directly, instead of funneling them all through a single function. | |
492 | */ | |
493 | void qemu_mutex_lock_iothread_impl(const char *file, int line) | |
296af7c9 | 494 | { |
d73415a3 | 495 | QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); |
cb764d06 | 496 | |
8d04fb55 | 497 | g_assert(!qemu_mutex_iothread_locked()); |
cb764d06 | 498 | bql_lock(&qemu_global_mutex, file, line); |
d5d2b15e | 499 | set_iothread_locked(true); |
296af7c9 BS |
500 | } |
501 | ||
502 | void qemu_mutex_unlock_iothread(void) | |
503 | { | |
8d04fb55 | 504 | g_assert(qemu_mutex_iothread_locked()); |
d5d2b15e | 505 | set_iothread_locked(false); |
296af7c9 BS |
506 | qemu_mutex_unlock(&qemu_global_mutex); |
507 | } | |
508 | ||
19e067e0 AP |
509 | void qemu_cond_wait_iothread(QemuCond *cond) |
510 | { | |
511 | qemu_cond_wait(cond, &qemu_global_mutex); | |
512 | } | |
513 | ||
b0c3cf94 CF |
514 | void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) |
515 | { | |
516 | qemu_cond_timedwait(cond, &qemu_global_mutex, ms); | |
517 | } | |
518 | ||
430065da CF |
519 | /* signal CPU creation */ |
520 | void cpu_thread_signal_created(CPUState *cpu) | |
521 | { | |
522 | cpu->created = true; | |
523 | qemu_cond_signal(&qemu_cpu_cond); | |
524 | } | |
525 | ||
526 | /* signal CPU destruction */ | |
527 | void cpu_thread_signal_destroyed(CPUState *cpu) | |
528 | { | |
529 | cpu->created = false; | |
530 | qemu_cond_signal(&qemu_cpu_cond); | |
531 | } | |
532 | ||
533 | ||
e8faee06 | 534 | static bool all_vcpus_paused(void) |
296af7c9 | 535 | { |
bdc44640 | 536 | CPUState *cpu; |
296af7c9 | 537 | |
bdc44640 | 538 | CPU_FOREACH(cpu) { |
182735ef | 539 | if (!cpu->stopped) { |
e8faee06 | 540 | return false; |
0ab07c62 | 541 | } |
296af7c9 BS |
542 | } |
543 | ||
e8faee06 | 544 | return true; |
296af7c9 BS |
545 | } |
546 | ||
547 | void pause_all_vcpus(void) | |
548 | { | |
bdc44640 | 549 | CPUState *cpu; |
296af7c9 | 550 | |
40daca54 | 551 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, false); |
bdc44640 | 552 | CPU_FOREACH(cpu) { |
ebd05fea DH |
553 | if (qemu_cpu_is_self(cpu)) { |
554 | qemu_cpu_stop(cpu, true); | |
555 | } else { | |
556 | cpu->stop = true; | |
557 | qemu_cpu_kick(cpu); | |
558 | } | |
d798e974 JK |
559 | } |
560 | ||
d759c951 AB |
561 | /* We need to drop the replay_lock so any vCPU threads woken up |
562 | * can finish their replay tasks | |
563 | */ | |
564 | replay_mutex_unlock(); | |
565 | ||
296af7c9 | 566 | while (!all_vcpus_paused()) { |
be7d6c57 | 567 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
bdc44640 | 568 | CPU_FOREACH(cpu) { |
182735ef | 569 | qemu_cpu_kick(cpu); |
296af7c9 BS |
570 | } |
571 | } | |
d759c951 AB |
572 | |
573 | qemu_mutex_unlock_iothread(); | |
574 | replay_mutex_lock(); | |
575 | qemu_mutex_lock_iothread(); | |
296af7c9 BS |
576 | } |
577 | ||
2993683b IM |
578 | void cpu_resume(CPUState *cpu) |
579 | { | |
580 | cpu->stop = false; | |
581 | cpu->stopped = false; | |
582 | qemu_cpu_kick(cpu); | |
583 | } | |
584 | ||
296af7c9 BS |
585 | void resume_all_vcpus(void) |
586 | { | |
bdc44640 | 587 | CPUState *cpu; |
296af7c9 | 588 | |
f962cac4 LM |
589 | if (!runstate_is_running()) { |
590 | return; | |
591 | } | |
592 | ||
40daca54 | 593 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); |
bdc44640 | 594 | CPU_FOREACH(cpu) { |
182735ef | 595 | cpu_resume(cpu); |
296af7c9 BS |
596 | } |
597 | } | |
598 | ||
dbadee4f | 599 | void cpu_remove_sync(CPUState *cpu) |
4c055ab5 GZ |
600 | { |
601 | cpu->stop = true; | |
602 | cpu->unplug = true; | |
603 | qemu_cpu_kick(cpu); | |
dbadee4f PB |
604 | qemu_mutex_unlock_iothread(); |
605 | qemu_thread_join(cpu->thread); | |
606 | qemu_mutex_lock_iothread(); | |
2c579042 BR |
607 | } |
608 | ||
b86f59c7 | 609 | void cpus_register_accel(const AccelOpsClass *ops) |
430065da | 610 | { |
b86f59c7 CF |
611 | assert(ops != NULL); |
612 | assert(ops->create_vcpu_thread != NULL); /* mandatory */ | |
613 | cpus_accel = ops; | |
430065da CF |
614 | } |
615 | ||
ae7467b1 AB |
616 | const AccelOpsClass *cpus_get_accel(void) |
617 | { | |
618 | /* broken if we call this early */ | |
619 | assert(cpus_accel); | |
620 | return cpus_accel; | |
621 | } | |
622 | ||
c643bed9 | 623 | void qemu_init_vcpu(CPUState *cpu) |
296af7c9 | 624 | { |
5cc8767d LX |
625 | MachineState *ms = MACHINE(qdev_get_machine()); |
626 | ||
627 | cpu->nr_cores = ms->smp.cores; | |
628 | cpu->nr_threads = ms->smp.threads; | |
f324e766 | 629 | cpu->stopped = true; |
9c09a251 | 630 | cpu->random_seed = qemu_guest_random_seed_thread_part1(); |
56943e8c PM |
631 | |
632 | if (!cpu->as) { | |
633 | /* If the target cpu hasn't set up any address spaces itself, | |
634 | * give it the default one. | |
635 | */ | |
12ebc9a7 | 636 | cpu->num_ases = 1; |
80ceb07a | 637 | cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory); |
56943e8c PM |
638 | } |
639 | ||
b86f59c7 | 640 | /* accelerators all implement the AccelOpsClass */ |
994aa172 CF |
641 | g_assert(cpus_accel != NULL && cpus_accel->create_vcpu_thread != NULL); |
642 | cpus_accel->create_vcpu_thread(cpu); | |
81e96311 DH |
643 | |
644 | while (!cpu->created) { | |
645 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
646 | } | |
296af7c9 BS |
647 | } |
648 | ||
b4a3d965 | 649 | void cpu_stop_current(void) |
296af7c9 | 650 | { |
4917cf44 | 651 | if (current_cpu) { |
0ec7e677 PM |
652 | current_cpu->stop = true; |
653 | cpu_exit(current_cpu); | |
b4a3d965 | 654 | } |
296af7c9 BS |
655 | } |
656 | ||
56983463 | 657 | int vm_stop(RunState state) |
296af7c9 | 658 | { |
aa723c23 | 659 | if (qemu_in_vcpu_thread()) { |
74892d24 | 660 | qemu_system_vmstop_request_prepare(); |
1dfb4dd9 | 661 | qemu_system_vmstop_request(state); |
296af7c9 BS |
662 | /* |
663 | * FIXME: should not return to device code in case | |
664 | * vm_stop() has been requested. | |
665 | */ | |
b4a3d965 | 666 | cpu_stop_current(); |
56983463 | 667 | return 0; |
296af7c9 | 668 | } |
56983463 | 669 | |
4486e89c | 670 | return do_vm_stop(state, true); |
296af7c9 BS |
671 | } |
672 | ||
2d76e823 CI |
673 | /** |
674 | * Prepare for (re)starting the VM. | |
675 | * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already | |
676 | * running or in case of an error condition), 0 otherwise. | |
677 | */ | |
d7482ffe | 678 | int vm_prepare_start(bool step_pending) |
2d76e823 CI |
679 | { |
680 | RunState requested; | |
2d76e823 CI |
681 | |
682 | qemu_vmstop_requested(&requested); | |
683 | if (runstate_is_running() && requested == RUN_STATE__MAX) { | |
684 | return -1; | |
685 | } | |
686 | ||
687 | /* Ensure that a STOP/RESUME pair of events is emitted if a | |
688 | * vmstop request was pending. The BLOCK_IO_ERROR event, for | |
689 | * example, according to documentation is always followed by | |
690 | * the STOP event. | |
691 | */ | |
692 | if (runstate_is_running()) { | |
3ab72385 PX |
693 | qapi_event_send_stop(); |
694 | qapi_event_send_resume(); | |
f056158d | 695 | return -1; |
2d76e823 CI |
696 | } |
697 | ||
d7482ffe IS |
698 | /* |
699 | * WHPX accelerator needs to know whether we are going to step | |
700 | * any CPUs, before starting the first one. | |
701 | */ | |
702 | if (cpus_accel->synchronize_pre_resume) { | |
703 | cpus_accel->synchronize_pre_resume(step_pending); | |
704 | } | |
705 | ||
2d76e823 | 706 | /* We are sending this now, but the CPUs will be resumed shortly later */ |
3ab72385 | 707 | qapi_event_send_resume(); |
f056158d | 708 | |
f056158d MA |
709 | cpu_enable_ticks(); |
710 | runstate_set(RUN_STATE_RUNNING); | |
711 | vm_state_notify(1, RUN_STATE_RUNNING); | |
712 | return 0; | |
2d76e823 CI |
713 | } |
714 | ||
715 | void vm_start(void) | |
716 | { | |
d7482ffe | 717 | if (!vm_prepare_start(false)) { |
2d76e823 CI |
718 | resume_all_vcpus(); |
719 | } | |
720 | } | |
721 | ||
8a9236f1 LC |
722 | /* does a state transition even if the VM is already stopped, |
723 | current state is forgotten forever */ | |
56983463 | 724 | int vm_stop_force_state(RunState state) |
8a9236f1 LC |
725 | { |
726 | if (runstate_is_running()) { | |
56983463 | 727 | return vm_stop(state); |
8a9236f1 | 728 | } else { |
8af3f5c6 | 729 | int ret; |
8a9236f1 | 730 | runstate_set(state); |
b2780d32 WC |
731 | |
732 | bdrv_drain_all(); | |
594a45ce KW |
733 | /* Make sure to return an error if the flush in a previous vm_stop() |
734 | * failed. */ | |
8af3f5c6 DB |
735 | ret = bdrv_flush_all(); |
736 | trace_vm_stop_flush_all(ret); | |
737 | return ret; | |
8a9236f1 LC |
738 | } |
739 | } | |
740 | ||
0cfd6a9a LC |
741 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, |
742 | bool has_cpu, int64_t cpu_index, Error **errp) | |
743 | { | |
744 | FILE *f; | |
745 | uint32_t l; | |
55e5c285 | 746 | CPUState *cpu; |
0cfd6a9a | 747 | uint8_t buf[1024]; |
0dc9daf0 | 748 | int64_t orig_addr = addr, orig_size = size; |
0cfd6a9a LC |
749 | |
750 | if (!has_cpu) { | |
751 | cpu_index = 0; | |
752 | } | |
753 | ||
151d1322 AF |
754 | cpu = qemu_get_cpu(cpu_index); |
755 | if (cpu == NULL) { | |
c6bd8c70 MA |
756 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", |
757 | "a CPU number"); | |
0cfd6a9a LC |
758 | return; |
759 | } | |
760 | ||
761 | f = fopen(filename, "wb"); | |
762 | if (!f) { | |
618da851 | 763 | error_setg_file_open(errp, errno, filename); |
0cfd6a9a LC |
764 | return; |
765 | } | |
766 | ||
767 | while (size != 0) { | |
768 | l = sizeof(buf); | |
769 | if (l > size) | |
770 | l = size; | |
2f4d0f59 | 771 | if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) { |
0dc9daf0 BP |
772 | error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRId64 |
773 | " specified", orig_addr, orig_size); | |
2f4d0f59 AK |
774 | goto exit; |
775 | } | |
0cfd6a9a | 776 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 777 | error_setg(errp, QERR_IO_ERROR); |
0cfd6a9a LC |
778 | goto exit; |
779 | } | |
780 | addr += l; | |
781 | size -= l; | |
782 | } | |
783 | ||
784 | exit: | |
785 | fclose(f); | |
786 | } | |
6d3962bf LC |
787 | |
788 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, | |
789 | Error **errp) | |
790 | { | |
791 | FILE *f; | |
792 | uint32_t l; | |
793 | uint8_t buf[1024]; | |
794 | ||
795 | f = fopen(filename, "wb"); | |
796 | if (!f) { | |
618da851 | 797 | error_setg_file_open(errp, errno, filename); |
6d3962bf LC |
798 | return; |
799 | } | |
800 | ||
801 | while (size != 0) { | |
802 | l = sizeof(buf); | |
803 | if (l > size) | |
804 | l = size; | |
eb6282f2 | 805 | cpu_physical_memory_read(addr, buf, l); |
6d3962bf | 806 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 807 | error_setg(errp, QERR_IO_ERROR); |
6d3962bf LC |
808 | goto exit; |
809 | } | |
810 | addr += l; | |
811 | size -= l; | |
812 | } | |
813 | ||
814 | exit: | |
815 | fclose(f); | |
816 | } | |
ab49ab5c LC |
817 | |
818 | void qmp_inject_nmi(Error **errp) | |
819 | { | |
947e4744 | 820 | nmi_monitor_handle(monitor_get_cpu_index(monitor_cur()), errp); |
ab49ab5c | 821 | } |
27498bef | 822 |