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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" |
112ed241 | 29 | #include "qapi/qapi-commands-misc.h" |
9af23989 | 30 | #include "qapi/qapi-events-run-state.h" |
a4e15de9 | 31 | #include "qapi/qmp/qerror.h" |
14a48c1d | 32 | #include "sysemu/tcg.h" |
022c62cb | 33 | #include "exec/gdbstub.h" |
b3946626 | 34 | #include "sysemu/hw_accel.h" |
9c17d615 | 35 | #include "sysemu/kvm.h" |
c97d6d2c | 36 | #include "sysemu/hvf.h" |
19306806 | 37 | #include "sysemu/whpx.h" |
63c91552 | 38 | #include "exec/exec-all.h" |
1de7afc9 | 39 | #include "qemu/thread.h" |
30865f31 | 40 | #include "qemu/plugin.h" |
9c17d615 | 41 | #include "sysemu/cpus.h" |
1de7afc9 | 42 | #include "qemu/main-loop.h" |
922a01a0 | 43 | #include "qemu/option.h" |
1de7afc9 | 44 | #include "qemu/bitmap.h" |
cb365646 | 45 | #include "qemu/seqlock.h" |
9c09a251 | 46 | #include "qemu/guest-random.h" |
dcb32f1d | 47 | #include "tcg/tcg.h" |
9cb805fd | 48 | #include "hw/nmi.h" |
8b427044 | 49 | #include "sysemu/replay.h" |
54d31236 | 50 | #include "sysemu/runstate.h" |
740b1759 | 51 | #include "sysemu/cpu-timers.h" |
5cc8767d | 52 | #include "hw/boards.h" |
650d103d | 53 | #include "hw/hw.h" |
0ff0fc19 | 54 | |
6d9cb73c JK |
55 | #ifdef CONFIG_LINUX |
56 | ||
57 | #include <sys/prctl.h> | |
58 | ||
c0532a76 MT |
59 | #ifndef PR_MCE_KILL |
60 | #define PR_MCE_KILL 33 | |
61 | #endif | |
62 | ||
6d9cb73c JK |
63 | #ifndef PR_MCE_KILL_SET |
64 | #define PR_MCE_KILL_SET 1 | |
65 | #endif | |
66 | ||
67 | #ifndef PR_MCE_KILL_EARLY | |
68 | #define PR_MCE_KILL_EARLY 1 | |
69 | #endif | |
70 | ||
71 | #endif /* CONFIG_LINUX */ | |
72 | ||
bd1f7ff4 YK |
73 | static QemuMutex qemu_global_mutex; |
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 EC |
81 | { |
82 | bool ret; | |
83 | ||
84 | qemu_mutex_lock(&cpu->work_mutex); | |
85 | ret = QSIMPLEQ_EMPTY(&cpu->work_list); | |
86 | qemu_mutex_unlock(&cpu->work_mutex); | |
87 | return ret; | |
88 | } | |
89 | ||
430065da | 90 | bool cpu_thread_is_idle(CPUState *cpu) |
ac873f1e | 91 | { |
0c0fcc20 | 92 | if (cpu->stop || !cpu_work_list_empty(cpu)) { |
ac873f1e PM |
93 | return false; |
94 | } | |
321bc0b2 | 95 | if (cpu_is_stopped(cpu)) { |
ac873f1e PM |
96 | return true; |
97 | } | |
8c2e1b00 | 98 | if (!cpu->halted || cpu_has_work(cpu) || |
215e79c0 | 99 | kvm_halt_in_kernel()) { |
ac873f1e PM |
100 | return false; |
101 | } | |
102 | return true; | |
103 | } | |
104 | ||
740b1759 | 105 | bool all_cpu_threads_idle(void) |
ac873f1e | 106 | { |
182735ef | 107 | CPUState *cpu; |
ac873f1e | 108 | |
bdc44640 | 109 | CPU_FOREACH(cpu) { |
182735ef | 110 | if (!cpu_thread_is_idle(cpu)) { |
ac873f1e PM |
111 | return false; |
112 | } | |
113 | } | |
114 | return true; | |
115 | } | |
116 | ||
296af7c9 BS |
117 | /***********************************************************/ |
118 | void hw_error(const char *fmt, ...) | |
119 | { | |
120 | va_list ap; | |
55e5c285 | 121 | CPUState *cpu; |
296af7c9 BS |
122 | |
123 | va_start(ap, fmt); | |
124 | fprintf(stderr, "qemu: hardware error: "); | |
125 | vfprintf(stderr, fmt, ap); | |
126 | fprintf(stderr, "\n"); | |
bdc44640 | 127 | CPU_FOREACH(cpu) { |
55e5c285 | 128 | fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); |
90c84c56 | 129 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU); |
296af7c9 BS |
130 | } |
131 | va_end(ap); | |
132 | abort(); | |
133 | } | |
134 | ||
430065da CF |
135 | /* |
136 | * The chosen accelerator is supposed to register this. | |
137 | */ | |
138 | static const CpusAccel *cpus_accel; | |
139 | ||
296af7c9 BS |
140 | void cpu_synchronize_all_states(void) |
141 | { | |
182735ef | 142 | CPUState *cpu; |
296af7c9 | 143 | |
bdc44640 | 144 | CPU_FOREACH(cpu) { |
182735ef | 145 | cpu_synchronize_state(cpu); |
296af7c9 BS |
146 | } |
147 | } | |
148 | ||
149 | void cpu_synchronize_all_post_reset(void) | |
150 | { | |
182735ef | 151 | CPUState *cpu; |
296af7c9 | 152 | |
bdc44640 | 153 | CPU_FOREACH(cpu) { |
182735ef | 154 | cpu_synchronize_post_reset(cpu); |
296af7c9 BS |
155 | } |
156 | } | |
157 | ||
158 | void cpu_synchronize_all_post_init(void) | |
159 | { | |
182735ef | 160 | CPUState *cpu; |
296af7c9 | 161 | |
bdc44640 | 162 | CPU_FOREACH(cpu) { |
182735ef | 163 | cpu_synchronize_post_init(cpu); |
296af7c9 BS |
164 | } |
165 | } | |
166 | ||
75e972da DG |
167 | void cpu_synchronize_all_pre_loadvm(void) |
168 | { | |
169 | CPUState *cpu; | |
170 | ||
171 | CPU_FOREACH(cpu) { | |
172 | cpu_synchronize_pre_loadvm(cpu); | |
173 | } | |
174 | } | |
175 | ||
430065da CF |
176 | void cpu_synchronize_state(CPUState *cpu) |
177 | { | |
178 | if (cpus_accel && cpus_accel->synchronize_state) { | |
179 | cpus_accel->synchronize_state(cpu); | |
180 | } | |
430065da CF |
181 | if (whpx_enabled()) { |
182 | whpx_cpu_synchronize_state(cpu); | |
183 | } | |
184 | } | |
185 | ||
186 | void cpu_synchronize_post_reset(CPUState *cpu) | |
187 | { | |
188 | if (cpus_accel && cpus_accel->synchronize_post_reset) { | |
189 | cpus_accel->synchronize_post_reset(cpu); | |
190 | } | |
430065da CF |
191 | if (whpx_enabled()) { |
192 | whpx_cpu_synchronize_post_reset(cpu); | |
193 | } | |
194 | } | |
195 | ||
196 | void cpu_synchronize_post_init(CPUState *cpu) | |
197 | { | |
198 | if (cpus_accel && cpus_accel->synchronize_post_init) { | |
199 | cpus_accel->synchronize_post_init(cpu); | |
200 | } | |
430065da CF |
201 | if (whpx_enabled()) { |
202 | whpx_cpu_synchronize_post_init(cpu); | |
203 | } | |
204 | } | |
205 | ||
206 | void cpu_synchronize_pre_loadvm(CPUState *cpu) | |
207 | { | |
208 | if (cpus_accel && cpus_accel->synchronize_pre_loadvm) { | |
209 | cpus_accel->synchronize_pre_loadvm(cpu); | |
210 | } | |
430065da CF |
211 | if (hvf_enabled()) { |
212 | hvf_cpu_synchronize_pre_loadvm(cpu); | |
213 | } | |
214 | if (whpx_enabled()) { | |
215 | whpx_cpu_synchronize_pre_loadvm(cpu); | |
216 | } | |
217 | } | |
218 | ||
219 | int64_t cpus_get_virtual_clock(void) | |
220 | { | |
221 | if (cpus_accel && cpus_accel->get_virtual_clock) { | |
222 | return cpus_accel->get_virtual_clock(); | |
223 | } | |
430065da CF |
224 | return cpu_get_clock(); |
225 | } | |
226 | ||
227 | /* | |
228 | * return the time elapsed in VM between vm_start and vm_stop. Unless | |
229 | * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU cycle | |
230 | * counter. | |
231 | */ | |
232 | int64_t cpus_get_elapsed_ticks(void) | |
233 | { | |
234 | if (cpus_accel && cpus_accel->get_elapsed_ticks) { | |
235 | return cpus_accel->get_elapsed_ticks(); | |
236 | } | |
430065da CF |
237 | return cpu_get_ticks(); |
238 | } | |
239 | ||
4486e89c | 240 | static int do_vm_stop(RunState state, bool send_stop) |
296af7c9 | 241 | { |
56983463 KW |
242 | int ret = 0; |
243 | ||
1354869c | 244 | if (runstate_is_running()) { |
f962cac4 | 245 | runstate_set(state); |
296af7c9 | 246 | cpu_disable_ticks(); |
296af7c9 | 247 | pause_all_vcpus(); |
1dfb4dd9 | 248 | vm_state_notify(0, state); |
4486e89c | 249 | if (send_stop) { |
3ab72385 | 250 | qapi_event_send_stop(); |
4486e89c | 251 | } |
296af7c9 | 252 | } |
56983463 | 253 | |
594a45ce | 254 | bdrv_drain_all(); |
22af08ea | 255 | ret = bdrv_flush_all(); |
594a45ce | 256 | |
56983463 | 257 | return ret; |
296af7c9 BS |
258 | } |
259 | ||
4486e89c SH |
260 | /* Special vm_stop() variant for terminating the process. Historically clients |
261 | * did not expect a QMP STOP event and so we need to retain compatibility. | |
262 | */ | |
263 | int vm_shutdown(void) | |
264 | { | |
265 | return do_vm_stop(RUN_STATE_SHUTDOWN, false); | |
266 | } | |
267 | ||
430065da | 268 | bool cpu_can_run(CPUState *cpu) |
296af7c9 | 269 | { |
4fdeee7c | 270 | if (cpu->stop) { |
a1fcaa73 | 271 | return false; |
0ab07c62 | 272 | } |
321bc0b2 | 273 | if (cpu_is_stopped(cpu)) { |
a1fcaa73 | 274 | return false; |
0ab07c62 | 275 | } |
a1fcaa73 | 276 | return true; |
296af7c9 BS |
277 | } |
278 | ||
430065da | 279 | void cpu_handle_guest_debug(CPUState *cpu) |
83f338f7 | 280 | { |
64f6b346 | 281 | gdb_set_stop_cpu(cpu); |
8cf71710 | 282 | qemu_system_debug_request(); |
f324e766 | 283 | cpu->stopped = true; |
3c638d06 JK |
284 | } |
285 | ||
6d9cb73c JK |
286 | #ifdef CONFIG_LINUX |
287 | static void sigbus_reraise(void) | |
288 | { | |
289 | sigset_t set; | |
290 | struct sigaction action; | |
291 | ||
292 | memset(&action, 0, sizeof(action)); | |
293 | action.sa_handler = SIG_DFL; | |
294 | if (!sigaction(SIGBUS, &action, NULL)) { | |
295 | raise(SIGBUS); | |
296 | sigemptyset(&set); | |
297 | sigaddset(&set, SIGBUS); | |
a2d1761d | 298 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); |
6d9cb73c JK |
299 | } |
300 | perror("Failed to re-raise SIGBUS!\n"); | |
301 | abort(); | |
302 | } | |
303 | ||
d98d4072 | 304 | static void sigbus_handler(int n, siginfo_t *siginfo, void *ctx) |
6d9cb73c | 305 | { |
a16fc07e PB |
306 | if (siginfo->si_code != BUS_MCEERR_AO && siginfo->si_code != BUS_MCEERR_AR) { |
307 | sigbus_reraise(); | |
308 | } | |
309 | ||
2ae41db2 PB |
310 | if (current_cpu) { |
311 | /* Called asynchronously in VCPU thread. */ | |
312 | if (kvm_on_sigbus_vcpu(current_cpu, siginfo->si_code, siginfo->si_addr)) { | |
313 | sigbus_reraise(); | |
314 | } | |
315 | } else { | |
316 | /* Called synchronously (via signalfd) in main thread. */ | |
317 | if (kvm_on_sigbus(siginfo->si_code, siginfo->si_addr)) { | |
318 | sigbus_reraise(); | |
319 | } | |
6d9cb73c JK |
320 | } |
321 | } | |
322 | ||
323 | static void qemu_init_sigbus(void) | |
324 | { | |
325 | struct sigaction action; | |
326 | ||
327 | memset(&action, 0, sizeof(action)); | |
328 | action.sa_flags = SA_SIGINFO; | |
d98d4072 | 329 | action.sa_sigaction = sigbus_handler; |
6d9cb73c JK |
330 | sigaction(SIGBUS, &action, NULL); |
331 | ||
332 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
333 | } | |
6d9cb73c | 334 | #else /* !CONFIG_LINUX */ |
6d9cb73c JK |
335 | static void qemu_init_sigbus(void) |
336 | { | |
337 | } | |
a16fc07e | 338 | #endif /* !CONFIG_LINUX */ |
ff48eb5f | 339 | |
296af7c9 BS |
340 | static QemuThread io_thread; |
341 | ||
296af7c9 BS |
342 | /* cpu creation */ |
343 | static QemuCond qemu_cpu_cond; | |
344 | /* system init */ | |
296af7c9 BS |
345 | static QemuCond qemu_pause_cond; |
346 | ||
d3b12f5d | 347 | void qemu_init_cpu_loop(void) |
296af7c9 | 348 | { |
6d9cb73c | 349 | qemu_init_sigbus(); |
ed94592b | 350 | qemu_cond_init(&qemu_cpu_cond); |
ed94592b | 351 | qemu_cond_init(&qemu_pause_cond); |
296af7c9 | 352 | qemu_mutex_init(&qemu_global_mutex); |
296af7c9 | 353 | |
b7680cb6 | 354 | qemu_thread_get_self(&io_thread); |
296af7c9 BS |
355 | } |
356 | ||
14e6fe12 | 357 | void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) |
e82bcec2 | 358 | { |
d148d90e | 359 | do_run_on_cpu(cpu, func, data, &qemu_global_mutex); |
3c02270d CV |
360 | } |
361 | ||
ebd05fea DH |
362 | static void qemu_cpu_stop(CPUState *cpu, bool exit) |
363 | { | |
364 | g_assert(qemu_cpu_is_self(cpu)); | |
365 | cpu->stop = false; | |
366 | cpu->stopped = true; | |
367 | if (exit) { | |
368 | cpu_exit(cpu); | |
369 | } | |
370 | qemu_cond_broadcast(&qemu_pause_cond); | |
371 | } | |
372 | ||
430065da | 373 | void qemu_wait_io_event_common(CPUState *cpu) |
296af7c9 | 374 | { |
d73415a3 | 375 | qatomic_mb_set(&cpu->thread_kicked, false); |
4fdeee7c | 376 | if (cpu->stop) { |
ebd05fea | 377 | qemu_cpu_stop(cpu, false); |
296af7c9 | 378 | } |
a5403c69 | 379 | process_queued_cpu_work(cpu); |
37257942 AB |
380 | } |
381 | ||
430065da | 382 | void qemu_wait_io_event(CPUState *cpu) |
296af7c9 | 383 | { |
30865f31 EC |
384 | bool slept = false; |
385 | ||
a98ae1d8 | 386 | while (cpu_thread_is_idle(cpu)) { |
30865f31 EC |
387 | if (!slept) { |
388 | slept = true; | |
389 | qemu_plugin_vcpu_idle_cb(cpu); | |
390 | } | |
f5c121b8 | 391 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); |
16400322 | 392 | } |
30865f31 EC |
393 | if (slept) { |
394 | qemu_plugin_vcpu_resume_cb(cpu); | |
395 | } | |
296af7c9 | 396 | |
db08b687 | 397 | #ifdef _WIN32 |
430065da CF |
398 | /* Eat dummy APC queued by cpus_kick_thread. */ |
399 | if (hax_enabled()) { | |
db08b687 | 400 | SleepEx(0, TRUE); |
c97d6d2c | 401 | } |
db08b687 | 402 | #endif |
c97d6d2c SAGDR |
403 | qemu_wait_io_event_common(cpu); |
404 | } | |
405 | ||
c97d6d2c SAGDR |
406 | /* The HVF-specific vCPU thread function. This one should only run when the host |
407 | * CPU supports the VMX "unrestricted guest" feature. */ | |
408 | static void *qemu_hvf_cpu_thread_fn(void *arg) | |
409 | { | |
410 | CPUState *cpu = arg; | |
411 | ||
412 | int r; | |
413 | ||
414 | assert(hvf_enabled()); | |
415 | ||
416 | rcu_register_thread(); | |
417 | ||
418 | qemu_mutex_lock_iothread(); | |
419 | qemu_thread_get_self(cpu->thread); | |
420 | ||
421 | cpu->thread_id = qemu_get_thread_id(); | |
422 | cpu->can_do_io = 1; | |
423 | current_cpu = cpu; | |
424 | ||
425 | hvf_init_vcpu(cpu); | |
426 | ||
427 | /* signal CPU creation */ | |
430065da | 428 | cpu_thread_signal_created(cpu); |
9c09a251 | 429 | qemu_guest_random_seed_thread_part2(cpu->random_seed); |
c97d6d2c SAGDR |
430 | |
431 | do { | |
432 | if (cpu_can_run(cpu)) { | |
433 | r = hvf_vcpu_exec(cpu); | |
434 | if (r == EXCP_DEBUG) { | |
435 | cpu_handle_guest_debug(cpu); | |
436 | } | |
437 | } | |
db08b687 | 438 | qemu_wait_io_event(cpu); |
c97d6d2c SAGDR |
439 | } while (!cpu->unplug || cpu_can_run(cpu)); |
440 | ||
441 | hvf_vcpu_destroy(cpu); | |
430065da | 442 | cpu_thread_signal_destroyed(cpu); |
c97d6d2c | 443 | qemu_mutex_unlock_iothread(); |
8178e637 | 444 | rcu_unregister_thread(); |
c97d6d2c SAGDR |
445 | return NULL; |
446 | } | |
447 | ||
19306806 JTV |
448 | static void *qemu_whpx_cpu_thread_fn(void *arg) |
449 | { | |
450 | CPUState *cpu = arg; | |
451 | int r; | |
452 | ||
453 | rcu_register_thread(); | |
454 | ||
455 | qemu_mutex_lock_iothread(); | |
456 | qemu_thread_get_self(cpu->thread); | |
457 | cpu->thread_id = qemu_get_thread_id(); | |
458 | current_cpu = cpu; | |
459 | ||
460 | r = whpx_init_vcpu(cpu); | |
461 | if (r < 0) { | |
462 | fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r)); | |
463 | exit(1); | |
464 | } | |
465 | ||
466 | /* signal CPU creation */ | |
430065da | 467 | cpu_thread_signal_created(cpu); |
9c09a251 | 468 | qemu_guest_random_seed_thread_part2(cpu->random_seed); |
19306806 JTV |
469 | |
470 | do { | |
471 | if (cpu_can_run(cpu)) { | |
472 | r = whpx_vcpu_exec(cpu); | |
473 | if (r == EXCP_DEBUG) { | |
474 | cpu_handle_guest_debug(cpu); | |
475 | } | |
476 | } | |
477 | while (cpu_thread_is_idle(cpu)) { | |
478 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); | |
479 | } | |
480 | qemu_wait_io_event_common(cpu); | |
481 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
482 | ||
483 | whpx_destroy_vcpu(cpu); | |
430065da | 484 | cpu_thread_signal_destroyed(cpu); |
19306806 JTV |
485 | qemu_mutex_unlock_iothread(); |
486 | rcu_unregister_thread(); | |
c97d6d2c SAGDR |
487 | return NULL; |
488 | } | |
489 | ||
430065da | 490 | void cpus_kick_thread(CPUState *cpu) |
cc015e9a PB |
491 | { |
492 | #ifndef _WIN32 | |
493 | int err; | |
494 | ||
e0c38211 PB |
495 | if (cpu->thread_kicked) { |
496 | return; | |
9102deda | 497 | } |
e0c38211 | 498 | cpu->thread_kicked = true; |
814e612e | 499 | err = pthread_kill(cpu->thread->thread, SIG_IPI); |
d455ebc4 | 500 | if (err && err != ESRCH) { |
cc015e9a PB |
501 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); |
502 | exit(1); | |
503 | } | |
504 | #else /* _WIN32 */ | |
b0cb0a66 | 505 | if (!qemu_cpu_is_self(cpu)) { |
19306806 JTV |
506 | if (whpx_enabled()) { |
507 | whpx_vcpu_kick(cpu); | |
b0cb0a66 VP |
508 | } |
509 | } | |
e0c38211 PB |
510 | #endif |
511 | } | |
ed9164a3 | 512 | |
c08d7424 | 513 | void qemu_cpu_kick(CPUState *cpu) |
296af7c9 | 514 | { |
f5c121b8 | 515 | qemu_cond_broadcast(cpu->halt_cond); |
430065da CF |
516 | if (cpus_accel && cpus_accel->kick_vcpu_thread) { |
517 | cpus_accel->kick_vcpu_thread(cpu); | |
e92558e4 | 518 | } else { /* default */ |
430065da | 519 | cpus_kick_thread(cpu); |
e0c38211 | 520 | } |
296af7c9 BS |
521 | } |
522 | ||
46d62fac | 523 | void qemu_cpu_kick_self(void) |
296af7c9 | 524 | { |
4917cf44 | 525 | assert(current_cpu); |
430065da | 526 | cpus_kick_thread(current_cpu); |
296af7c9 BS |
527 | } |
528 | ||
60e82579 | 529 | bool qemu_cpu_is_self(CPUState *cpu) |
296af7c9 | 530 | { |
814e612e | 531 | return qemu_thread_is_self(cpu->thread); |
296af7c9 BS |
532 | } |
533 | ||
79e2b9ae | 534 | bool qemu_in_vcpu_thread(void) |
aa723c23 | 535 | { |
4917cf44 | 536 | return current_cpu && qemu_cpu_is_self(current_cpu); |
aa723c23 JQ |
537 | } |
538 | ||
afbe7053 PB |
539 | static __thread bool iothread_locked = false; |
540 | ||
541 | bool qemu_mutex_iothread_locked(void) | |
542 | { | |
543 | return iothread_locked; | |
544 | } | |
545 | ||
cb764d06 EC |
546 | /* |
547 | * The BQL is taken from so many places that it is worth profiling the | |
548 | * callers directly, instead of funneling them all through a single function. | |
549 | */ | |
550 | void qemu_mutex_lock_iothread_impl(const char *file, int line) | |
296af7c9 | 551 | { |
d73415a3 | 552 | QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); |
cb764d06 | 553 | |
8d04fb55 | 554 | g_assert(!qemu_mutex_iothread_locked()); |
cb764d06 | 555 | bql_lock(&qemu_global_mutex, file, line); |
afbe7053 | 556 | iothread_locked = true; |
296af7c9 BS |
557 | } |
558 | ||
559 | void qemu_mutex_unlock_iothread(void) | |
560 | { | |
8d04fb55 | 561 | g_assert(qemu_mutex_iothread_locked()); |
afbe7053 | 562 | iothread_locked = false; |
296af7c9 BS |
563 | qemu_mutex_unlock(&qemu_global_mutex); |
564 | } | |
565 | ||
19e067e0 AP |
566 | void qemu_cond_wait_iothread(QemuCond *cond) |
567 | { | |
568 | qemu_cond_wait(cond, &qemu_global_mutex); | |
569 | } | |
570 | ||
b0c3cf94 CF |
571 | void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) |
572 | { | |
573 | qemu_cond_timedwait(cond, &qemu_global_mutex, ms); | |
574 | } | |
575 | ||
430065da CF |
576 | /* signal CPU creation */ |
577 | void cpu_thread_signal_created(CPUState *cpu) | |
578 | { | |
579 | cpu->created = true; | |
580 | qemu_cond_signal(&qemu_cpu_cond); | |
581 | } | |
582 | ||
583 | /* signal CPU destruction */ | |
584 | void cpu_thread_signal_destroyed(CPUState *cpu) | |
585 | { | |
586 | cpu->created = false; | |
587 | qemu_cond_signal(&qemu_cpu_cond); | |
588 | } | |
589 | ||
590 | ||
e8faee06 | 591 | static bool all_vcpus_paused(void) |
296af7c9 | 592 | { |
bdc44640 | 593 | CPUState *cpu; |
296af7c9 | 594 | |
bdc44640 | 595 | CPU_FOREACH(cpu) { |
182735ef | 596 | if (!cpu->stopped) { |
e8faee06 | 597 | return false; |
0ab07c62 | 598 | } |
296af7c9 BS |
599 | } |
600 | ||
e8faee06 | 601 | return true; |
296af7c9 BS |
602 | } |
603 | ||
604 | void pause_all_vcpus(void) | |
605 | { | |
bdc44640 | 606 | CPUState *cpu; |
296af7c9 | 607 | |
40daca54 | 608 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, false); |
bdc44640 | 609 | CPU_FOREACH(cpu) { |
ebd05fea DH |
610 | if (qemu_cpu_is_self(cpu)) { |
611 | qemu_cpu_stop(cpu, true); | |
612 | } else { | |
613 | cpu->stop = true; | |
614 | qemu_cpu_kick(cpu); | |
615 | } | |
d798e974 JK |
616 | } |
617 | ||
d759c951 AB |
618 | /* We need to drop the replay_lock so any vCPU threads woken up |
619 | * can finish their replay tasks | |
620 | */ | |
621 | replay_mutex_unlock(); | |
622 | ||
296af7c9 | 623 | while (!all_vcpus_paused()) { |
be7d6c57 | 624 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
bdc44640 | 625 | CPU_FOREACH(cpu) { |
182735ef | 626 | qemu_cpu_kick(cpu); |
296af7c9 BS |
627 | } |
628 | } | |
d759c951 AB |
629 | |
630 | qemu_mutex_unlock_iothread(); | |
631 | replay_mutex_lock(); | |
632 | qemu_mutex_lock_iothread(); | |
296af7c9 BS |
633 | } |
634 | ||
2993683b IM |
635 | void cpu_resume(CPUState *cpu) |
636 | { | |
637 | cpu->stop = false; | |
638 | cpu->stopped = false; | |
639 | qemu_cpu_kick(cpu); | |
640 | } | |
641 | ||
296af7c9 BS |
642 | void resume_all_vcpus(void) |
643 | { | |
bdc44640 | 644 | CPUState *cpu; |
296af7c9 | 645 | |
f962cac4 LM |
646 | if (!runstate_is_running()) { |
647 | return; | |
648 | } | |
649 | ||
40daca54 | 650 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); |
bdc44640 | 651 | CPU_FOREACH(cpu) { |
182735ef | 652 | cpu_resume(cpu); |
296af7c9 BS |
653 | } |
654 | } | |
655 | ||
dbadee4f | 656 | void cpu_remove_sync(CPUState *cpu) |
4c055ab5 GZ |
657 | { |
658 | cpu->stop = true; | |
659 | cpu->unplug = true; | |
660 | qemu_cpu_kick(cpu); | |
dbadee4f PB |
661 | qemu_mutex_unlock_iothread(); |
662 | qemu_thread_join(cpu->thread); | |
663 | qemu_mutex_lock_iothread(); | |
2c579042 BR |
664 | } |
665 | ||
c97d6d2c SAGDR |
666 | static void qemu_hvf_start_vcpu(CPUState *cpu) |
667 | { | |
668 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
669 | ||
670 | /* HVF currently does not support TCG, and only runs in | |
671 | * unrestricted-guest mode. */ | |
672 | assert(hvf_enabled()); | |
673 | ||
674 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
675 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
676 | qemu_cond_init(cpu->halt_cond); | |
677 | ||
678 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF", | |
679 | cpu->cpu_index); | |
680 | qemu_thread_create(cpu->thread, thread_name, qemu_hvf_cpu_thread_fn, | |
681 | cpu, QEMU_THREAD_JOINABLE); | |
c97d6d2c SAGDR |
682 | } |
683 | ||
19306806 JTV |
684 | static void qemu_whpx_start_vcpu(CPUState *cpu) |
685 | { | |
686 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
687 | ||
688 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
689 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
690 | qemu_cond_init(cpu->halt_cond); | |
691 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX", | |
692 | cpu->cpu_index); | |
693 | qemu_thread_create(cpu->thread, thread_name, qemu_whpx_cpu_thread_fn, | |
694 | cpu, QEMU_THREAD_JOINABLE); | |
695 | #ifdef _WIN32 | |
696 | cpu->hThread = qemu_thread_get_handle(cpu->thread); | |
697 | #endif | |
19306806 JTV |
698 | } |
699 | ||
430065da CF |
700 | void cpus_register_accel(const CpusAccel *ca) |
701 | { | |
702 | assert(ca != NULL); | |
703 | assert(ca->create_vcpu_thread != NULL); /* mandatory */ | |
704 | cpus_accel = ca; | |
705 | } | |
706 | ||
c643bed9 | 707 | void qemu_init_vcpu(CPUState *cpu) |
296af7c9 | 708 | { |
5cc8767d LX |
709 | MachineState *ms = MACHINE(qdev_get_machine()); |
710 | ||
711 | cpu->nr_cores = ms->smp.cores; | |
712 | cpu->nr_threads = ms->smp.threads; | |
f324e766 | 713 | cpu->stopped = true; |
9c09a251 | 714 | cpu->random_seed = qemu_guest_random_seed_thread_part1(); |
56943e8c PM |
715 | |
716 | if (!cpu->as) { | |
717 | /* If the target cpu hasn't set up any address spaces itself, | |
718 | * give it the default one. | |
719 | */ | |
12ebc9a7 | 720 | cpu->num_ases = 1; |
80ceb07a | 721 | cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory); |
56943e8c PM |
722 | } |
723 | ||
430065da CF |
724 | if (cpus_accel) { |
725 | /* accelerator already implements the CpusAccel interface */ | |
726 | cpus_accel->create_vcpu_thread(cpu); | |
c97d6d2c SAGDR |
727 | } else if (hvf_enabled()) { |
728 | qemu_hvf_start_vcpu(cpu); | |
19306806 JTV |
729 | } else if (whpx_enabled()) { |
730 | qemu_whpx_start_vcpu(cpu); | |
c7f0f3b1 | 731 | } else { |
1583a389 | 732 | g_assert_not_reached(); |
0ab07c62 | 733 | } |
81e96311 DH |
734 | |
735 | while (!cpu->created) { | |
736 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
737 | } | |
296af7c9 BS |
738 | } |
739 | ||
b4a3d965 | 740 | void cpu_stop_current(void) |
296af7c9 | 741 | { |
4917cf44 | 742 | if (current_cpu) { |
0ec7e677 PM |
743 | current_cpu->stop = true; |
744 | cpu_exit(current_cpu); | |
b4a3d965 | 745 | } |
296af7c9 BS |
746 | } |
747 | ||
56983463 | 748 | int vm_stop(RunState state) |
296af7c9 | 749 | { |
aa723c23 | 750 | if (qemu_in_vcpu_thread()) { |
74892d24 | 751 | qemu_system_vmstop_request_prepare(); |
1dfb4dd9 | 752 | qemu_system_vmstop_request(state); |
296af7c9 BS |
753 | /* |
754 | * FIXME: should not return to device code in case | |
755 | * vm_stop() has been requested. | |
756 | */ | |
b4a3d965 | 757 | cpu_stop_current(); |
56983463 | 758 | return 0; |
296af7c9 | 759 | } |
56983463 | 760 | |
4486e89c | 761 | return do_vm_stop(state, true); |
296af7c9 BS |
762 | } |
763 | ||
2d76e823 CI |
764 | /** |
765 | * Prepare for (re)starting the VM. | |
766 | * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already | |
767 | * running or in case of an error condition), 0 otherwise. | |
768 | */ | |
769 | int vm_prepare_start(void) | |
770 | { | |
771 | RunState requested; | |
2d76e823 CI |
772 | |
773 | qemu_vmstop_requested(&requested); | |
774 | if (runstate_is_running() && requested == RUN_STATE__MAX) { | |
775 | return -1; | |
776 | } | |
777 | ||
778 | /* Ensure that a STOP/RESUME pair of events is emitted if a | |
779 | * vmstop request was pending. The BLOCK_IO_ERROR event, for | |
780 | * example, according to documentation is always followed by | |
781 | * the STOP event. | |
782 | */ | |
783 | if (runstate_is_running()) { | |
3ab72385 PX |
784 | qapi_event_send_stop(); |
785 | qapi_event_send_resume(); | |
f056158d | 786 | return -1; |
2d76e823 CI |
787 | } |
788 | ||
789 | /* We are sending this now, but the CPUs will be resumed shortly later */ | |
3ab72385 | 790 | qapi_event_send_resume(); |
f056158d | 791 | |
f056158d MA |
792 | cpu_enable_ticks(); |
793 | runstate_set(RUN_STATE_RUNNING); | |
794 | vm_state_notify(1, RUN_STATE_RUNNING); | |
795 | return 0; | |
2d76e823 CI |
796 | } |
797 | ||
798 | void vm_start(void) | |
799 | { | |
800 | if (!vm_prepare_start()) { | |
801 | resume_all_vcpus(); | |
802 | } | |
803 | } | |
804 | ||
8a9236f1 LC |
805 | /* does a state transition even if the VM is already stopped, |
806 | current state is forgotten forever */ | |
56983463 | 807 | int vm_stop_force_state(RunState state) |
8a9236f1 LC |
808 | { |
809 | if (runstate_is_running()) { | |
56983463 | 810 | return vm_stop(state); |
8a9236f1 LC |
811 | } else { |
812 | runstate_set(state); | |
b2780d32 WC |
813 | |
814 | bdrv_drain_all(); | |
594a45ce KW |
815 | /* Make sure to return an error if the flush in a previous vm_stop() |
816 | * failed. */ | |
22af08ea | 817 | return bdrv_flush_all(); |
8a9236f1 LC |
818 | } |
819 | } | |
820 | ||
0442428a | 821 | void list_cpus(const char *optarg) |
262353cb BS |
822 | { |
823 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
e916cbf8 | 824 | #if defined(cpu_list) |
0442428a | 825 | cpu_list(); |
262353cb BS |
826 | #endif |
827 | } | |
de0b36b6 | 828 | |
0cfd6a9a LC |
829 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, |
830 | bool has_cpu, int64_t cpu_index, Error **errp) | |
831 | { | |
832 | FILE *f; | |
833 | uint32_t l; | |
55e5c285 | 834 | CPUState *cpu; |
0cfd6a9a | 835 | uint8_t buf[1024]; |
0dc9daf0 | 836 | int64_t orig_addr = addr, orig_size = size; |
0cfd6a9a LC |
837 | |
838 | if (!has_cpu) { | |
839 | cpu_index = 0; | |
840 | } | |
841 | ||
151d1322 AF |
842 | cpu = qemu_get_cpu(cpu_index); |
843 | if (cpu == NULL) { | |
c6bd8c70 MA |
844 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", |
845 | "a CPU number"); | |
0cfd6a9a LC |
846 | return; |
847 | } | |
848 | ||
849 | f = fopen(filename, "wb"); | |
850 | if (!f) { | |
618da851 | 851 | error_setg_file_open(errp, errno, filename); |
0cfd6a9a LC |
852 | return; |
853 | } | |
854 | ||
855 | while (size != 0) { | |
856 | l = sizeof(buf); | |
857 | if (l > size) | |
858 | l = size; | |
2f4d0f59 | 859 | if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) { |
0dc9daf0 BP |
860 | error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRId64 |
861 | " specified", orig_addr, orig_size); | |
2f4d0f59 AK |
862 | goto exit; |
863 | } | |
0cfd6a9a | 864 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 865 | error_setg(errp, QERR_IO_ERROR); |
0cfd6a9a LC |
866 | goto exit; |
867 | } | |
868 | addr += l; | |
869 | size -= l; | |
870 | } | |
871 | ||
872 | exit: | |
873 | fclose(f); | |
874 | } | |
6d3962bf LC |
875 | |
876 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, | |
877 | Error **errp) | |
878 | { | |
879 | FILE *f; | |
880 | uint32_t l; | |
881 | uint8_t buf[1024]; | |
882 | ||
883 | f = fopen(filename, "wb"); | |
884 | if (!f) { | |
618da851 | 885 | error_setg_file_open(errp, errno, filename); |
6d3962bf LC |
886 | return; |
887 | } | |
888 | ||
889 | while (size != 0) { | |
890 | l = sizeof(buf); | |
891 | if (l > size) | |
892 | l = size; | |
eb6282f2 | 893 | cpu_physical_memory_read(addr, buf, l); |
6d3962bf | 894 | if (fwrite(buf, 1, l, f) != l) { |
c6bd8c70 | 895 | error_setg(errp, QERR_IO_ERROR); |
6d3962bf LC |
896 | goto exit; |
897 | } | |
898 | addr += l; | |
899 | size -= l; | |
900 | } | |
901 | ||
902 | exit: | |
903 | fclose(f); | |
904 | } | |
ab49ab5c LC |
905 | |
906 | void qmp_inject_nmi(Error **errp) | |
907 | { | |
9cb805fd | 908 | nmi_monitor_handle(monitor_get_cpu_index(), errp); |
ab49ab5c | 909 | } |
27498bef | 910 |