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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" |
a8d25326 | 26 | #include "qemu-common.h" |
83c9089e | 27 | #include "monitor/monitor.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" |
63c91552 | 35 | #include "exec/exec-all.h" |
1de7afc9 | 36 | #include "qemu/thread.h" |
30865f31 | 37 | #include "qemu/plugin.h" |
9c17d615 | 38 | #include "sysemu/cpus.h" |
9c09a251 | 39 | #include "qemu/guest-random.h" |
9cb805fd | 40 | #include "hw/nmi.h" |
8b427044 | 41 | #include "sysemu/replay.h" |
54d31236 | 42 | #include "sysemu/runstate.h" |
740b1759 | 43 | #include "sysemu/cpu-timers.h" |
faf20793 | 44 | #include "sysemu/whpx.h" |
5cc8767d | 45 | #include "hw/boards.h" |
650d103d | 46 | #include "hw/hw.h" |
8af3f5c6 | 47 | #include "trace.h" |
0ff0fc19 | 48 | |
6d9cb73c JK |
49 | #ifdef CONFIG_LINUX |
50 | ||
51 | #include <sys/prctl.h> | |
52 | ||
c0532a76 MT |
53 | #ifndef PR_MCE_KILL |
54 | #define PR_MCE_KILL 33 | |
55 | #endif | |
56 | ||
6d9cb73c JK |
57 | #ifndef PR_MCE_KILL_SET |
58 | #define PR_MCE_KILL_SET 1 | |
59 | #endif | |
60 | ||
61 | #ifndef PR_MCE_KILL_EARLY | |
62 | #define PR_MCE_KILL_EARLY 1 | |
63 | #endif | |
64 | ||
65 | #endif /* CONFIG_LINUX */ | |
66 | ||
bd1f7ff4 YK |
67 | static QemuMutex qemu_global_mutex; |
68 | ||
321bc0b2 TC |
69 | bool cpu_is_stopped(CPUState *cpu) |
70 | { | |
71 | return cpu->stopped || !runstate_is_running(); | |
72 | } | |
73 | ||
430065da | 74 | bool cpu_work_list_empty(CPUState *cpu) |
0c0fcc20 EC |
75 | { |
76 | bool ret; | |
77 | ||
78 | qemu_mutex_lock(&cpu->work_mutex); | |
79 | ret = QSIMPLEQ_EMPTY(&cpu->work_list); | |
80 | qemu_mutex_unlock(&cpu->work_mutex); | |
81 | return ret; | |
82 | } | |
83 | ||
430065da | 84 | bool cpu_thread_is_idle(CPUState *cpu) |
ac873f1e | 85 | { |
0c0fcc20 | 86 | if (cpu->stop || !cpu_work_list_empty(cpu)) { |
ac873f1e PM |
87 | return false; |
88 | } | |
321bc0b2 | 89 | if (cpu_is_stopped(cpu)) { |
ac873f1e PM |
90 | return true; |
91 | } | |
8c2e1b00 | 92 | if (!cpu->halted || cpu_has_work(cpu) || |
faf20793 | 93 | kvm_halt_in_kernel() || whpx_apic_in_platform()) { |
ac873f1e PM |
94 | return false; |
95 | } | |
96 | return true; | |
97 | } | |
98 | ||
740b1759 | 99 | bool all_cpu_threads_idle(void) |
ac873f1e | 100 | { |
182735ef | 101 | CPUState *cpu; |
ac873f1e | 102 | |
bdc44640 | 103 | CPU_FOREACH(cpu) { |
182735ef | 104 | if (!cpu_thread_is_idle(cpu)) { |
ac873f1e PM |
105 | return false; |
106 | } | |
107 | } | |
108 | return true; | |
109 | } | |
110 | ||
296af7c9 BS |
111 | /***********************************************************/ |
112 | void hw_error(const char *fmt, ...) | |
113 | { | |
114 | va_list ap; | |
55e5c285 | 115 | CPUState *cpu; |
296af7c9 BS |
116 | |
117 | va_start(ap, fmt); | |
118 | fprintf(stderr, "qemu: hardware error: "); | |
119 | vfprintf(stderr, fmt, ap); | |
120 | fprintf(stderr, "\n"); | |
bdc44640 | 121 | CPU_FOREACH(cpu) { |
55e5c285 | 122 | fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); |
90c84c56 | 123 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU); |
296af7c9 BS |
124 | } |
125 | va_end(ap); | |
126 | abort(); | |
127 | } | |
128 | ||
430065da CF |
129 | /* |
130 | * The chosen accelerator is supposed to register this. | |
131 | */ | |
b86f59c7 | 132 | static const AccelOpsClass *cpus_accel; |
430065da | 133 | |
296af7c9 BS |
134 | void cpu_synchronize_all_states(void) |
135 | { | |
182735ef | 136 | CPUState *cpu; |
296af7c9 | 137 | |
bdc44640 | 138 | CPU_FOREACH(cpu) { |
182735ef | 139 | cpu_synchronize_state(cpu); |
296af7c9 BS |
140 | } |
141 | } | |
142 | ||
143 | void cpu_synchronize_all_post_reset(void) | |
144 | { | |
182735ef | 145 | CPUState *cpu; |
296af7c9 | 146 | |
bdc44640 | 147 | CPU_FOREACH(cpu) { |
182735ef | 148 | cpu_synchronize_post_reset(cpu); |
296af7c9 BS |
149 | } |
150 | } | |
151 | ||
152 | void cpu_synchronize_all_post_init(void) | |
153 | { | |
182735ef | 154 | CPUState *cpu; |
296af7c9 | 155 | |
bdc44640 | 156 | CPU_FOREACH(cpu) { |
182735ef | 157 | cpu_synchronize_post_init(cpu); |
296af7c9 BS |
158 | } |
159 | } | |
160 | ||
75e972da DG |
161 | void cpu_synchronize_all_pre_loadvm(void) |
162 | { | |
163 | CPUState *cpu; | |
164 | ||
165 | CPU_FOREACH(cpu) { | |
166 | cpu_synchronize_pre_loadvm(cpu); | |
167 | } | |
168 | } | |
169 | ||
430065da CF |
170 | void cpu_synchronize_state(CPUState *cpu) |
171 | { | |
994aa172 | 172 | if (cpus_accel->synchronize_state) { |
430065da CF |
173 | cpus_accel->synchronize_state(cpu); |
174 | } | |
430065da CF |
175 | } |
176 | ||
177 | void cpu_synchronize_post_reset(CPUState *cpu) | |
178 | { | |
994aa172 | 179 | if (cpus_accel->synchronize_post_reset) { |
430065da CF |
180 | cpus_accel->synchronize_post_reset(cpu); |
181 | } | |
430065da CF |
182 | } |
183 | ||
184 | void cpu_synchronize_post_init(CPUState *cpu) | |
185 | { | |
994aa172 | 186 | if (cpus_accel->synchronize_post_init) { |
430065da CF |
187 | cpus_accel->synchronize_post_init(cpu); |
188 | } | |
430065da CF |
189 | } |
190 | ||
191 | void cpu_synchronize_pre_loadvm(CPUState *cpu) | |
192 | { | |
994aa172 | 193 | if (cpus_accel->synchronize_pre_loadvm) { |
430065da CF |
194 | cpus_accel->synchronize_pre_loadvm(cpu); |
195 | } | |
430065da CF |
196 | } |
197 | ||
92a5199b TL |
198 | bool cpus_are_resettable(void) |
199 | { | |
200 | return cpu_check_are_resettable(); | |
201 | } | |
202 | ||
430065da CF |
203 | int64_t cpus_get_virtual_clock(void) |
204 | { | |
994aa172 CF |
205 | /* |
206 | * XXX | |
207 | * | |
208 | * need to check that cpus_accel is not NULL, because qcow2 calls | |
209 | * qemu_get_clock_ns(CLOCK_VIRTUAL) without any accel initialized and | |
210 | * with ticks disabled in some io-tests: | |
211 | * 030 040 041 060 099 120 127 140 156 161 172 181 191 192 195 203 229 249 256 267 | |
212 | * | |
213 | * is this expected? | |
214 | * | |
215 | * XXX | |
216 | */ | |
430065da CF |
217 | if (cpus_accel && cpus_accel->get_virtual_clock) { |
218 | return cpus_accel->get_virtual_clock(); | |
219 | } | |
430065da CF |
220 | return cpu_get_clock(); |
221 | } | |
222 | ||
223 | /* | |
224 | * return the time elapsed in VM between vm_start and vm_stop. Unless | |
225 | * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU cycle | |
226 | * counter. | |
227 | */ | |
228 | int64_t cpus_get_elapsed_ticks(void) | |
229 | { | |
994aa172 | 230 | if (cpus_accel->get_elapsed_ticks) { |
430065da CF |
231 | return cpus_accel->get_elapsed_ticks(); |
232 | } | |
430065da CF |
233 | return cpu_get_ticks(); |
234 | } | |
235 | ||
bb4776be CF |
236 | static void generic_handle_interrupt(CPUState *cpu, int mask) |
237 | { | |
238 | cpu->interrupt_request |= mask; | |
239 | ||
240 | if (!qemu_cpu_is_self(cpu)) { | |
241 | qemu_cpu_kick(cpu); | |
242 | } | |
243 | } | |
244 | ||
245 | void cpu_interrupt(CPUState *cpu, int mask) | |
246 | { | |
247 | if (cpus_accel->handle_interrupt) { | |
248 | cpus_accel->handle_interrupt(cpu, mask); | |
249 | } else { | |
250 | generic_handle_interrupt(cpu, mask); | |
251 | } | |
252 | } | |
253 | ||
4486e89c | 254 | static int do_vm_stop(RunState state, bool send_stop) |
296af7c9 | 255 | { |
56983463 KW |
256 | int ret = 0; |
257 | ||
1354869c | 258 | if (runstate_is_running()) { |
f962cac4 | 259 | runstate_set(state); |
296af7c9 | 260 | cpu_disable_ticks(); |
296af7c9 | 261 | pause_all_vcpus(); |
1dfb4dd9 | 262 | vm_state_notify(0, state); |
4486e89c | 263 | if (send_stop) { |
3ab72385 | 264 | qapi_event_send_stop(); |
4486e89c | 265 | } |
296af7c9 | 266 | } |
56983463 | 267 | |
594a45ce | 268 | bdrv_drain_all(); |
22af08ea | 269 | ret = bdrv_flush_all(); |
8af3f5c6 | 270 | trace_vm_stop_flush_all(ret); |
594a45ce | 271 | |
56983463 | 272 | return ret; |
296af7c9 BS |
273 | } |
274 | ||
4486e89c SH |
275 | /* Special vm_stop() variant for terminating the process. Historically clients |
276 | * did not expect a QMP STOP event and so we need to retain compatibility. | |
277 | */ | |
278 | int vm_shutdown(void) | |
279 | { | |
280 | return do_vm_stop(RUN_STATE_SHUTDOWN, false); | |
281 | } | |
282 | ||
430065da | 283 | bool cpu_can_run(CPUState *cpu) |
296af7c9 | 284 | { |
4fdeee7c | 285 | if (cpu->stop) { |
a1fcaa73 | 286 | return false; |
0ab07c62 | 287 | } |
321bc0b2 | 288 | if (cpu_is_stopped(cpu)) { |
a1fcaa73 | 289 | return false; |
0ab07c62 | 290 | } |
a1fcaa73 | 291 | return true; |
296af7c9 BS |
292 | } |
293 | ||
430065da | 294 | void cpu_handle_guest_debug(CPUState *cpu) |
83f338f7 | 295 | { |
fda8458b PD |
296 | if (replay_running_debug()) { |
297 | if (!cpu->singlestep_enabled) { | |
cda38259 PD |
298 | /* |
299 | * Report about the breakpoint and | |
300 | * make a single step to skip it | |
301 | */ | |
302 | replay_breakpoint(); | |
fda8458b PD |
303 | cpu_single_step(cpu, SSTEP_ENABLE); |
304 | } else { | |
305 | cpu_single_step(cpu, 0); | |
306 | } | |
307 | } else { | |
308 | gdb_set_stop_cpu(cpu); | |
309 | qemu_system_debug_request(); | |
310 | cpu->stopped = true; | |
311 | } | |
3c638d06 JK |
312 | } |
313 | ||
6d9cb73c JK |
314 | #ifdef CONFIG_LINUX |
315 | static void sigbus_reraise(void) | |
316 | { | |
317 | sigset_t set; | |
318 | struct sigaction action; | |
319 | ||
320 | memset(&action, 0, sizeof(action)); | |
321 | action.sa_handler = SIG_DFL; | |
322 | if (!sigaction(SIGBUS, &action, NULL)) { | |
323 | raise(SIGBUS); | |
324 | sigemptyset(&set); | |
325 | sigaddset(&set, SIGBUS); | |
a2d1761d | 326 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); |
6d9cb73c | 327 | } |
eb1960aa | 328 | perror("Failed to re-raise SIGBUS!"); |
6d9cb73c JK |
329 | abort(); |
330 | } | |
331 | ||
d98d4072 | 332 | static void sigbus_handler(int n, siginfo_t *siginfo, void *ctx) |
6d9cb73c | 333 | { |
a16fc07e PB |
334 | if (siginfo->si_code != BUS_MCEERR_AO && siginfo->si_code != BUS_MCEERR_AR) { |
335 | sigbus_reraise(); | |
336 | } | |
337 | ||
2ae41db2 PB |
338 | if (current_cpu) { |
339 | /* Called asynchronously in VCPU thread. */ | |
340 | if (kvm_on_sigbus_vcpu(current_cpu, siginfo->si_code, siginfo->si_addr)) { | |
341 | sigbus_reraise(); | |
342 | } | |
343 | } else { | |
344 | /* Called synchronously (via signalfd) in main thread. */ | |
345 | if (kvm_on_sigbus(siginfo->si_code, siginfo->si_addr)) { | |
346 | sigbus_reraise(); | |
347 | } | |
6d9cb73c JK |
348 | } |
349 | } | |
350 | ||
351 | static void qemu_init_sigbus(void) | |
352 | { | |
353 | struct sigaction action; | |
354 | ||
355 | memset(&action, 0, sizeof(action)); | |
356 | action.sa_flags = SA_SIGINFO; | |
d98d4072 | 357 | action.sa_sigaction = sigbus_handler; |
6d9cb73c JK |
358 | sigaction(SIGBUS, &action, NULL); |
359 | ||
360 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
361 | } | |
6d9cb73c | 362 | #else /* !CONFIG_LINUX */ |
6d9cb73c JK |
363 | static void qemu_init_sigbus(void) |
364 | { | |
365 | } | |
a16fc07e | 366 | #endif /* !CONFIG_LINUX */ |
ff48eb5f | 367 | |
296af7c9 BS |
368 | static QemuThread io_thread; |
369 | ||
296af7c9 BS |
370 | /* cpu creation */ |
371 | static QemuCond qemu_cpu_cond; | |
372 | /* system init */ | |
296af7c9 BS |
373 | static QemuCond qemu_pause_cond; |
374 | ||
d3b12f5d | 375 | void qemu_init_cpu_loop(void) |
296af7c9 | 376 | { |
6d9cb73c | 377 | qemu_init_sigbus(); |
ed94592b | 378 | qemu_cond_init(&qemu_cpu_cond); |
ed94592b | 379 | qemu_cond_init(&qemu_pause_cond); |
296af7c9 | 380 | qemu_mutex_init(&qemu_global_mutex); |
296af7c9 | 381 | |
b7680cb6 | 382 | qemu_thread_get_self(&io_thread); |
296af7c9 BS |
383 | } |
384 | ||
14e6fe12 | 385 | void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) |
e82bcec2 | 386 | { |
d148d90e | 387 | do_run_on_cpu(cpu, func, data, &qemu_global_mutex); |
3c02270d CV |
388 | } |
389 | ||
ebd05fea DH |
390 | static void qemu_cpu_stop(CPUState *cpu, bool exit) |
391 | { | |
392 | g_assert(qemu_cpu_is_self(cpu)); | |
393 | cpu->stop = false; | |
394 | cpu->stopped = true; | |
395 | if (exit) { | |
396 | cpu_exit(cpu); | |
397 | } | |
398 | qemu_cond_broadcast(&qemu_pause_cond); | |
399 | } | |
400 | ||
430065da | 401 | void qemu_wait_io_event_common(CPUState *cpu) |
296af7c9 | 402 | { |
d73415a3 | 403 | qatomic_mb_set(&cpu->thread_kicked, false); |
4fdeee7c | 404 | if (cpu->stop) { |
ebd05fea | 405 | qemu_cpu_stop(cpu, false); |
296af7c9 | 406 | } |
a5403c69 | 407 | process_queued_cpu_work(cpu); |
37257942 AB |
408 | } |
409 | ||
430065da | 410 | void qemu_wait_io_event(CPUState *cpu) |
296af7c9 | 411 | { |
30865f31 EC |
412 | bool slept = false; |
413 | ||
a98ae1d8 | 414 | while (cpu_thread_is_idle(cpu)) { |
30865f31 EC |
415 | if (!slept) { |
416 | slept = true; | |
417 | qemu_plugin_vcpu_idle_cb(cpu); | |
418 | } | |
f5c121b8 | 419 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); |
16400322 | 420 | } |
30865f31 EC |
421 | if (slept) { |
422 | qemu_plugin_vcpu_resume_cb(cpu); | |
423 | } | |
296af7c9 | 424 | |
db08b687 | 425 | #ifdef _WIN32 |
430065da CF |
426 | /* Eat dummy APC queued by cpus_kick_thread. */ |
427 | if (hax_enabled()) { | |
db08b687 | 428 | SleepEx(0, TRUE); |
c97d6d2c | 429 | } |
db08b687 | 430 | #endif |
c97d6d2c SAGDR |
431 | qemu_wait_io_event_common(cpu); |
432 | } | |
433 | ||
430065da | 434 | void cpus_kick_thread(CPUState *cpu) |
cc015e9a PB |
435 | { |
436 | #ifndef _WIN32 | |
437 | int err; | |
438 | ||
e0c38211 PB |
439 | if (cpu->thread_kicked) { |
440 | return; | |
9102deda | 441 | } |
e0c38211 | 442 | cpu->thread_kicked = true; |
814e612e | 443 | err = pthread_kill(cpu->thread->thread, SIG_IPI); |
d455ebc4 | 444 | if (err && err != ESRCH) { |
cc015e9a PB |
445 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); |
446 | exit(1); | |
447 | } | |
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 | ||
afbe7053 PB |
477 | static __thread bool iothread_locked = false; |
478 | ||
479 | bool qemu_mutex_iothread_locked(void) | |
480 | { | |
481 | return iothread_locked; | |
482 | } | |
483 | ||
cb764d06 EC |
484 | /* |
485 | * The BQL is taken from so many places that it is worth profiling the | |
486 | * callers directly, instead of funneling them all through a single function. | |
487 | */ | |
488 | void qemu_mutex_lock_iothread_impl(const char *file, int line) | |
296af7c9 | 489 | { |
d73415a3 | 490 | QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); |
cb764d06 | 491 | |
8d04fb55 | 492 | g_assert(!qemu_mutex_iothread_locked()); |
cb764d06 | 493 | bql_lock(&qemu_global_mutex, file, line); |
afbe7053 | 494 | iothread_locked = true; |
296af7c9 BS |
495 | } |
496 | ||
497 | void qemu_mutex_unlock_iothread(void) | |
498 | { | |
8d04fb55 | 499 | g_assert(qemu_mutex_iothread_locked()); |
afbe7053 | 500 | iothread_locked = false; |
296af7c9 BS |
501 | qemu_mutex_unlock(&qemu_global_mutex); |
502 | } | |
503 | ||
19e067e0 AP |
504 | void qemu_cond_wait_iothread(QemuCond *cond) |
505 | { | |
506 | qemu_cond_wait(cond, &qemu_global_mutex); | |
507 | } | |
508 | ||
b0c3cf94 CF |
509 | void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) |
510 | { | |
511 | qemu_cond_timedwait(cond, &qemu_global_mutex, ms); | |
512 | } | |
513 | ||
430065da CF |
514 | /* signal CPU creation */ |
515 | void cpu_thread_signal_created(CPUState *cpu) | |
516 | { | |
517 | cpu->created = true; | |
518 | qemu_cond_signal(&qemu_cpu_cond); | |
519 | } | |
520 | ||
521 | /* signal CPU destruction */ | |
522 | void cpu_thread_signal_destroyed(CPUState *cpu) | |
523 | { | |
524 | cpu->created = false; | |
525 | qemu_cond_signal(&qemu_cpu_cond); | |
526 | } | |
527 | ||
528 | ||
e8faee06 | 529 | static bool all_vcpus_paused(void) |
296af7c9 | 530 | { |
bdc44640 | 531 | CPUState *cpu; |
296af7c9 | 532 | |
bdc44640 | 533 | CPU_FOREACH(cpu) { |
182735ef | 534 | if (!cpu->stopped) { |
e8faee06 | 535 | return false; |
0ab07c62 | 536 | } |
296af7c9 BS |
537 | } |
538 | ||
e8faee06 | 539 | return true; |
296af7c9 BS |
540 | } |
541 | ||
542 | void pause_all_vcpus(void) | |
543 | { | |
bdc44640 | 544 | CPUState *cpu; |
296af7c9 | 545 | |
40daca54 | 546 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, false); |
bdc44640 | 547 | CPU_FOREACH(cpu) { |
ebd05fea DH |
548 | if (qemu_cpu_is_self(cpu)) { |
549 | qemu_cpu_stop(cpu, true); | |
550 | } else { | |
551 | cpu->stop = true; | |
552 | qemu_cpu_kick(cpu); | |
553 | } | |
d798e974 JK |
554 | } |
555 | ||
d759c951 AB |
556 | /* We need to drop the replay_lock so any vCPU threads woken up |
557 | * can finish their replay tasks | |
558 | */ | |
559 | replay_mutex_unlock(); | |
560 | ||
296af7c9 | 561 | while (!all_vcpus_paused()) { |
be7d6c57 | 562 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
bdc44640 | 563 | CPU_FOREACH(cpu) { |
182735ef | 564 | qemu_cpu_kick(cpu); |
296af7c9 BS |
565 | } |
566 | } | |
d759c951 AB |
567 | |
568 | qemu_mutex_unlock_iothread(); | |
569 | replay_mutex_lock(); | |
570 | qemu_mutex_lock_iothread(); | |
296af7c9 BS |
571 | } |
572 | ||
2993683b IM |
573 | void cpu_resume(CPUState *cpu) |
574 | { | |
575 | cpu->stop = false; | |
576 | cpu->stopped = false; | |
577 | qemu_cpu_kick(cpu); | |
578 | } | |
579 | ||
296af7c9 BS |
580 | void resume_all_vcpus(void) |
581 | { | |
bdc44640 | 582 | CPUState *cpu; |
296af7c9 | 583 | |
f962cac4 LM |
584 | if (!runstate_is_running()) { |
585 | return; | |
586 | } | |
587 | ||
40daca54 | 588 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); |
bdc44640 | 589 | CPU_FOREACH(cpu) { |
182735ef | 590 | cpu_resume(cpu); |
296af7c9 BS |
591 | } |
592 | } | |
593 | ||
dbadee4f | 594 | void cpu_remove_sync(CPUState *cpu) |
4c055ab5 GZ |
595 | { |
596 | cpu->stop = true; | |
597 | cpu->unplug = true; | |
598 | qemu_cpu_kick(cpu); | |
dbadee4f PB |
599 | qemu_mutex_unlock_iothread(); |
600 | qemu_thread_join(cpu->thread); | |
601 | qemu_mutex_lock_iothread(); | |
2c579042 BR |
602 | } |
603 | ||
b86f59c7 | 604 | void cpus_register_accel(const AccelOpsClass *ops) |
430065da | 605 | { |
b86f59c7 CF |
606 | assert(ops != NULL); |
607 | assert(ops->create_vcpu_thread != NULL); /* mandatory */ | |
608 | cpus_accel = ops; | |
430065da CF |
609 | } |
610 | ||
c643bed9 | 611 | void qemu_init_vcpu(CPUState *cpu) |
296af7c9 | 612 | { |
5cc8767d LX |
613 | MachineState *ms = MACHINE(qdev_get_machine()); |
614 | ||
615 | cpu->nr_cores = ms->smp.cores; | |
616 | cpu->nr_threads = ms->smp.threads; | |
f324e766 | 617 | cpu->stopped = true; |
9c09a251 | 618 | cpu->random_seed = qemu_guest_random_seed_thread_part1(); |
56943e8c PM |
619 | |
620 | if (!cpu->as) { | |
621 | /* If the target cpu hasn't set up any address spaces itself, | |
622 | * give it the default one. | |
623 | */ | |
12ebc9a7 | 624 | cpu->num_ases = 1; |
80ceb07a | 625 | cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory); |
56943e8c PM |
626 | } |
627 | ||
b86f59c7 | 628 | /* accelerators all implement the AccelOpsClass */ |
994aa172 CF |
629 | g_assert(cpus_accel != NULL && cpus_accel->create_vcpu_thread != NULL); |
630 | cpus_accel->create_vcpu_thread(cpu); | |
81e96311 DH |
631 | |
632 | while (!cpu->created) { | |
633 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
634 | } | |
296af7c9 BS |
635 | } |
636 | ||
b4a3d965 | 637 | void cpu_stop_current(void) |
296af7c9 | 638 | { |
4917cf44 | 639 | if (current_cpu) { |
0ec7e677 PM |
640 | current_cpu->stop = true; |
641 | cpu_exit(current_cpu); | |
b4a3d965 | 642 | } |
296af7c9 BS |
643 | } |
644 | ||
56983463 | 645 | int vm_stop(RunState state) |
296af7c9 | 646 | { |
aa723c23 | 647 | if (qemu_in_vcpu_thread()) { |
74892d24 | 648 | qemu_system_vmstop_request_prepare(); |
1dfb4dd9 | 649 | qemu_system_vmstop_request(state); |
296af7c9 BS |
650 | /* |
651 | * FIXME: should not return to device code in case | |
652 | * vm_stop() has been requested. | |
653 | */ | |
b4a3d965 | 654 | cpu_stop_current(); |
56983463 | 655 | return 0; |
296af7c9 | 656 | } |
56983463 | 657 | |
4486e89c | 658 | return do_vm_stop(state, true); |
296af7c9 BS |
659 | } |
660 | ||
2d76e823 CI |
661 | /** |
662 | * Prepare for (re)starting the VM. | |
663 | * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already | |
664 | * running or in case of an error condition), 0 otherwise. | |
665 | */ | |
666 | int vm_prepare_start(void) | |
667 | { | |
668 | RunState requested; | |
2d76e823 CI |
669 | |
670 | qemu_vmstop_requested(&requested); | |
671 | if (runstate_is_running() && requested == RUN_STATE__MAX) { | |
672 | return -1; | |
673 | } | |
674 | ||
675 | /* Ensure that a STOP/RESUME pair of events is emitted if a | |
676 | * vmstop request was pending. The BLOCK_IO_ERROR event, for | |
677 | * example, according to documentation is always followed by | |
678 | * the STOP event. | |
679 | */ | |
680 | if (runstate_is_running()) { | |
3ab72385 PX |
681 | qapi_event_send_stop(); |
682 | qapi_event_send_resume(); | |
f056158d | 683 | return -1; |
2d76e823 CI |
684 | } |
685 | ||
686 | /* We are sending this now, but the CPUs will be resumed shortly later */ | |
3ab72385 | 687 | qapi_event_send_resume(); |
f056158d | 688 | |
f056158d MA |
689 | cpu_enable_ticks(); |
690 | runstate_set(RUN_STATE_RUNNING); | |
691 | vm_state_notify(1, RUN_STATE_RUNNING); | |
692 | return 0; | |
2d76e823 CI |
693 | } |
694 | ||
695 | void vm_start(void) | |
696 | { | |
697 | if (!vm_prepare_start()) { | |
698 | resume_all_vcpus(); | |
699 | } | |
700 | } | |
701 | ||
8a9236f1 LC |
702 | /* does a state transition even if the VM is already stopped, |
703 | current state is forgotten forever */ | |
56983463 | 704 | int vm_stop_force_state(RunState state) |
8a9236f1 LC |
705 | { |
706 | if (runstate_is_running()) { | |
56983463 | 707 | return vm_stop(state); |
8a9236f1 | 708 | } else { |
8af3f5c6 | 709 | int ret; |
8a9236f1 | 710 | runstate_set(state); |
b2780d32 WC |
711 | |
712 | bdrv_drain_all(); | |
594a45ce KW |
713 | /* Make sure to return an error if the flush in a previous vm_stop() |
714 | * failed. */ | |
8af3f5c6 DB |
715 | ret = bdrv_flush_all(); |
716 | trace_vm_stop_flush_all(ret); | |
717 | return ret; | |
8a9236f1 LC |
718 | } |
719 | } | |
720 | ||
0442428a | 721 | void list_cpus(const char *optarg) |
262353cb BS |
722 | { |
723 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
e916cbf8 | 724 | #if defined(cpu_list) |
0442428a | 725 | cpu_list(); |
262353cb BS |
726 | #endif |
727 | } | |
de0b36b6 | 728 | |
0cfd6a9a LC |
729 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, |
730 | bool has_cpu, int64_t cpu_index, Error **errp) | |
731 | { | |
732 | FILE *f; | |
733 | uint32_t l; | |
55e5c285 | 734 | CPUState *cpu; |
0cfd6a9a | 735 | uint8_t buf[1024]; |
0dc9daf0 | 736 | int64_t orig_addr = addr, orig_size = size; |
0cfd6a9a LC |
737 | |
738 | if (!has_cpu) { | |
739 | cpu_index = 0; | |
740 | } | |
741 | ||
151d1322 AF |
742 | cpu = qemu_get_cpu(cpu_index); |
743 | if (cpu == NULL) { | |
c6bd8c70 MA |
744 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", |
745 | "a CPU number"); | |
0cfd6a9a LC |
746 | return; |
747 | } | |
748 | ||
749 | f = fopen(filename, "wb"); | |
750 | if (!f) { | |
618da851 | 751 | error_setg_file_open(errp, errno, filename); |
0cfd6a9a LC |
752 | return; |
753 | } | |
754 | ||
755 | while (size != 0) { | |
756 | l = sizeof(buf); | |
757 | if (l > size) | |
758 | l = size; | |
2f4d0f59 | 759 | if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) { |
0dc9daf0 BP |
760 | error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRId64 |
761 | " specified", orig_addr, orig_size); | |
2f4d0f59 AK |
762 | goto exit; |
763 | } | |
0cfd6a9a | 764 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 765 | error_setg(errp, QERR_IO_ERROR); |
0cfd6a9a LC |
766 | goto exit; |
767 | } | |
768 | addr += l; | |
769 | size -= l; | |
770 | } | |
771 | ||
772 | exit: | |
773 | fclose(f); | |
774 | } | |
6d3962bf LC |
775 | |
776 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, | |
777 | Error **errp) | |
778 | { | |
779 | FILE *f; | |
780 | uint32_t l; | |
781 | uint8_t buf[1024]; | |
782 | ||
783 | f = fopen(filename, "wb"); | |
784 | if (!f) { | |
618da851 | 785 | error_setg_file_open(errp, errno, filename); |
6d3962bf LC |
786 | return; |
787 | } | |
788 | ||
789 | while (size != 0) { | |
790 | l = sizeof(buf); | |
791 | if (l > size) | |
792 | l = size; | |
eb6282f2 | 793 | cpu_physical_memory_read(addr, buf, l); |
6d3962bf | 794 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 795 | error_setg(errp, QERR_IO_ERROR); |
6d3962bf LC |
796 | goto exit; |
797 | } | |
798 | addr += l; | |
799 | size -= l; | |
800 | } | |
801 | ||
802 | exit: | |
803 | fclose(f); | |
804 | } | |
ab49ab5c LC |
805 | |
806 | void qmp_inject_nmi(Error **errp) | |
807 | { | |
947e4744 | 808 | nmi_monitor_handle(monitor_get_cpu_index(monitor_cur()), errp); |
ab49ab5c | 809 | } |
27498bef | 810 |