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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 | ||
25 | /* Needed early for CONFIG_BSD etc. */ | |
26 | #include "config-host.h" | |
27 | ||
28 | #include "monitor.h" | |
29 | #include "sysemu.h" | |
30 | #include "gdbstub.h" | |
31 | #include "dma.h" | |
32 | #include "kvm.h" | |
33 | ||
96284e89 | 34 | #include "qemu-thread.h" |
296af7c9 | 35 | #include "cpus.h" |
0ff0fc19 JK |
36 | |
37 | #ifndef _WIN32 | |
a8486bc9 | 38 | #include "compatfd.h" |
0ff0fc19 | 39 | #endif |
296af7c9 | 40 | |
7277e027 BS |
41 | #ifdef SIGRTMIN |
42 | #define SIG_IPI (SIGRTMIN+4) | |
43 | #else | |
44 | #define SIG_IPI SIGUSR1 | |
45 | #endif | |
46 | ||
6d9cb73c JK |
47 | #ifdef CONFIG_LINUX |
48 | ||
49 | #include <sys/prctl.h> | |
50 | ||
c0532a76 MT |
51 | #ifndef PR_MCE_KILL |
52 | #define PR_MCE_KILL 33 | |
53 | #endif | |
54 | ||
6d9cb73c JK |
55 | #ifndef PR_MCE_KILL_SET |
56 | #define PR_MCE_KILL_SET 1 | |
57 | #endif | |
58 | ||
59 | #ifndef PR_MCE_KILL_EARLY | |
60 | #define PR_MCE_KILL_EARLY 1 | |
61 | #endif | |
62 | ||
63 | #endif /* CONFIG_LINUX */ | |
64 | ||
296af7c9 BS |
65 | static CPUState *next_cpu; |
66 | ||
67 | /***********************************************************/ | |
68 | void hw_error(const char *fmt, ...) | |
69 | { | |
70 | va_list ap; | |
71 | CPUState *env; | |
72 | ||
73 | va_start(ap, fmt); | |
74 | fprintf(stderr, "qemu: hardware error: "); | |
75 | vfprintf(stderr, fmt, ap); | |
76 | fprintf(stderr, "\n"); | |
77 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
78 | fprintf(stderr, "CPU #%d:\n", env->cpu_index); | |
79 | #ifdef TARGET_I386 | |
80 | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU); | |
81 | #else | |
82 | cpu_dump_state(env, stderr, fprintf, 0); | |
83 | #endif | |
84 | } | |
85 | va_end(ap); | |
86 | abort(); | |
87 | } | |
88 | ||
89 | void cpu_synchronize_all_states(void) | |
90 | { | |
91 | CPUState *cpu; | |
92 | ||
93 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
94 | cpu_synchronize_state(cpu); | |
95 | } | |
96 | } | |
97 | ||
98 | void cpu_synchronize_all_post_reset(void) | |
99 | { | |
100 | CPUState *cpu; | |
101 | ||
102 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
103 | cpu_synchronize_post_reset(cpu); | |
104 | } | |
105 | } | |
106 | ||
107 | void cpu_synchronize_all_post_init(void) | |
108 | { | |
109 | CPUState *cpu; | |
110 | ||
111 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
112 | cpu_synchronize_post_init(cpu); | |
113 | } | |
114 | } | |
115 | ||
3ae9501c MT |
116 | int cpu_is_stopped(CPUState *env) |
117 | { | |
118 | return !vm_running || env->stopped; | |
119 | } | |
120 | ||
296af7c9 BS |
121 | static void do_vm_stop(int reason) |
122 | { | |
123 | if (vm_running) { | |
124 | cpu_disable_ticks(); | |
125 | vm_running = 0; | |
126 | pause_all_vcpus(); | |
127 | vm_state_notify(0, reason); | |
55df6f33 MT |
128 | qemu_aio_flush(); |
129 | bdrv_flush_all(); | |
296af7c9 BS |
130 | monitor_protocol_event(QEVENT_STOP, NULL); |
131 | } | |
132 | } | |
133 | ||
134 | static int cpu_can_run(CPUState *env) | |
135 | { | |
0ab07c62 | 136 | if (env->stop) { |
296af7c9 | 137 | return 0; |
0ab07c62 JK |
138 | } |
139 | if (env->stopped || !vm_running) { | |
296af7c9 | 140 | return 0; |
0ab07c62 | 141 | } |
296af7c9 BS |
142 | return 1; |
143 | } | |
144 | ||
16400322 | 145 | static bool cpu_thread_is_idle(CPUState *env) |
296af7c9 | 146 | { |
16400322 JK |
147 | if (env->stop || env->queued_work_first) { |
148 | return false; | |
149 | } | |
150 | if (env->stopped || !vm_running) { | |
151 | return true; | |
152 | } | |
f2c1cc81 JK |
153 | if (!env->halted || qemu_cpu_has_work(env) || |
154 | (kvm_enabled() && kvm_irqchip_in_kernel())) { | |
16400322 JK |
155 | return false; |
156 | } | |
157 | return true; | |
296af7c9 BS |
158 | } |
159 | ||
ab33fcda | 160 | bool all_cpu_threads_idle(void) |
296af7c9 BS |
161 | { |
162 | CPUState *env; | |
163 | ||
16400322 JK |
164 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
165 | if (!cpu_thread_is_idle(env)) { | |
166 | return false; | |
167 | } | |
168 | } | |
169 | return true; | |
296af7c9 BS |
170 | } |
171 | ||
1009d2ed | 172 | static void cpu_handle_guest_debug(CPUState *env) |
83f338f7 | 173 | { |
3c638d06 | 174 | gdb_set_stop_cpu(env); |
8cf71710 | 175 | qemu_system_debug_request(); |
83f338f7 | 176 | env->stopped = 1; |
3c638d06 JK |
177 | } |
178 | ||
714bd040 PB |
179 | static void cpu_signal(int sig) |
180 | { | |
181 | if (cpu_single_env) { | |
182 | cpu_exit(cpu_single_env); | |
183 | } | |
184 | exit_request = 1; | |
185 | } | |
714bd040 | 186 | |
6d9cb73c JK |
187 | #ifdef CONFIG_LINUX |
188 | static void sigbus_reraise(void) | |
189 | { | |
190 | sigset_t set; | |
191 | struct sigaction action; | |
192 | ||
193 | memset(&action, 0, sizeof(action)); | |
194 | action.sa_handler = SIG_DFL; | |
195 | if (!sigaction(SIGBUS, &action, NULL)) { | |
196 | raise(SIGBUS); | |
197 | sigemptyset(&set); | |
198 | sigaddset(&set, SIGBUS); | |
199 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
200 | } | |
201 | perror("Failed to re-raise SIGBUS!\n"); | |
202 | abort(); | |
203 | } | |
204 | ||
205 | static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, | |
206 | void *ctx) | |
207 | { | |
208 | if (kvm_on_sigbus(siginfo->ssi_code, | |
209 | (void *)(intptr_t)siginfo->ssi_addr)) { | |
210 | sigbus_reraise(); | |
211 | } | |
212 | } | |
213 | ||
214 | static void qemu_init_sigbus(void) | |
215 | { | |
216 | struct sigaction action; | |
217 | ||
218 | memset(&action, 0, sizeof(action)); | |
219 | action.sa_flags = SA_SIGINFO; | |
220 | action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; | |
221 | sigaction(SIGBUS, &action, NULL); | |
222 | ||
223 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
224 | } | |
225 | ||
1ab3c6c0 JK |
226 | static void qemu_kvm_eat_signals(CPUState *env) |
227 | { | |
228 | struct timespec ts = { 0, 0 }; | |
229 | siginfo_t siginfo; | |
230 | sigset_t waitset; | |
231 | sigset_t chkset; | |
232 | int r; | |
233 | ||
234 | sigemptyset(&waitset); | |
235 | sigaddset(&waitset, SIG_IPI); | |
236 | sigaddset(&waitset, SIGBUS); | |
237 | ||
238 | do { | |
239 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
240 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
241 | perror("sigtimedwait"); | |
242 | exit(1); | |
243 | } | |
244 | ||
245 | switch (r) { | |
246 | case SIGBUS: | |
247 | if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) { | |
248 | sigbus_reraise(); | |
249 | } | |
250 | break; | |
251 | default: | |
252 | break; | |
253 | } | |
254 | ||
255 | r = sigpending(&chkset); | |
256 | if (r == -1) { | |
257 | perror("sigpending"); | |
258 | exit(1); | |
259 | } | |
260 | } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS)); | |
1ab3c6c0 JK |
261 | } |
262 | ||
6d9cb73c JK |
263 | #else /* !CONFIG_LINUX */ |
264 | ||
265 | static void qemu_init_sigbus(void) | |
266 | { | |
267 | } | |
1ab3c6c0 JK |
268 | |
269 | static void qemu_kvm_eat_signals(CPUState *env) | |
270 | { | |
271 | } | |
6d9cb73c JK |
272 | #endif /* !CONFIG_LINUX */ |
273 | ||
296af7c9 BS |
274 | #ifndef _WIN32 |
275 | static int io_thread_fd = -1; | |
276 | ||
277 | static void qemu_event_increment(void) | |
278 | { | |
279 | /* Write 8 bytes to be compatible with eventfd. */ | |
26a82330 | 280 | static const uint64_t val = 1; |
296af7c9 BS |
281 | ssize_t ret; |
282 | ||
0ab07c62 | 283 | if (io_thread_fd == -1) { |
296af7c9 | 284 | return; |
0ab07c62 | 285 | } |
296af7c9 BS |
286 | do { |
287 | ret = write(io_thread_fd, &val, sizeof(val)); | |
288 | } while (ret < 0 && errno == EINTR); | |
289 | ||
290 | /* EAGAIN is fine, a read must be pending. */ | |
291 | if (ret < 0 && errno != EAGAIN) { | |
77bec686 | 292 | fprintf(stderr, "qemu_event_increment: write() failed: %s\n", |
296af7c9 BS |
293 | strerror(errno)); |
294 | exit (1); | |
295 | } | |
296 | } | |
297 | ||
298 | static void qemu_event_read(void *opaque) | |
299 | { | |
e0efb993 | 300 | int fd = (intptr_t)opaque; |
296af7c9 BS |
301 | ssize_t len; |
302 | char buffer[512]; | |
303 | ||
304 | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */ | |
305 | do { | |
306 | len = read(fd, buffer, sizeof(buffer)); | |
307 | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); | |
308 | } | |
309 | ||
310 | static int qemu_event_init(void) | |
311 | { | |
312 | int err; | |
313 | int fds[2]; | |
314 | ||
315 | err = qemu_eventfd(fds); | |
0ab07c62 | 316 | if (err == -1) { |
296af7c9 | 317 | return -errno; |
0ab07c62 | 318 | } |
296af7c9 | 319 | err = fcntl_setfl(fds[0], O_NONBLOCK); |
0ab07c62 | 320 | if (err < 0) { |
296af7c9 | 321 | goto fail; |
0ab07c62 | 322 | } |
296af7c9 | 323 | err = fcntl_setfl(fds[1], O_NONBLOCK); |
0ab07c62 | 324 | if (err < 0) { |
296af7c9 | 325 | goto fail; |
0ab07c62 | 326 | } |
296af7c9 | 327 | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
e0efb993 | 328 | (void *)(intptr_t)fds[0]); |
296af7c9 BS |
329 | |
330 | io_thread_fd = fds[1]; | |
331 | return 0; | |
332 | ||
333 | fail: | |
334 | close(fds[0]); | |
335 | close(fds[1]); | |
336 | return err; | |
337 | } | |
55f8d6ac | 338 | |
55f8d6ac JK |
339 | static void dummy_signal(int sig) |
340 | { | |
341 | } | |
55f8d6ac | 342 | |
d0f294ce JK |
343 | /* If we have signalfd, we mask out the signals we want to handle and then |
344 | * use signalfd to listen for them. We rely on whatever the current signal | |
345 | * handler is to dispatch the signals when we receive them. | |
346 | */ | |
347 | static void sigfd_handler(void *opaque) | |
348 | { | |
e0efb993 | 349 | int fd = (intptr_t)opaque; |
d0f294ce JK |
350 | struct qemu_signalfd_siginfo info; |
351 | struct sigaction action; | |
352 | ssize_t len; | |
353 | ||
354 | while (1) { | |
355 | do { | |
356 | len = read(fd, &info, sizeof(info)); | |
357 | } while (len == -1 && errno == EINTR); | |
358 | ||
359 | if (len == -1 && errno == EAGAIN) { | |
360 | break; | |
361 | } | |
362 | ||
363 | if (len != sizeof(info)) { | |
364 | printf("read from sigfd returned %zd: %m\n", len); | |
365 | return; | |
366 | } | |
367 | ||
368 | sigaction(info.ssi_signo, NULL, &action); | |
369 | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) { | |
370 | action.sa_sigaction(info.ssi_signo, | |
371 | (siginfo_t *)&info, NULL); | |
372 | } else if (action.sa_handler) { | |
373 | action.sa_handler(info.ssi_signo); | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
712ae480 | 378 | static int qemu_signal_init(void) |
d0f294ce JK |
379 | { |
380 | int sigfd; | |
712ae480 | 381 | sigset_t set; |
d0f294ce | 382 | |
712ae480 PB |
383 | /* SIGUSR2 used by posix-aio-compat.c */ |
384 | sigemptyset(&set); | |
385 | sigaddset(&set, SIGUSR2); | |
386 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
387 | ||
89b9ba66 AR |
388 | /* |
389 | * SIG_IPI must be blocked in the main thread and must not be caught | |
390 | * by sigwait() in the signal thread. Otherwise, the cpu thread will | |
391 | * not catch it reliably. | |
392 | */ | |
393 | sigemptyset(&set); | |
394 | sigaddset(&set, SIG_IPI); | |
395 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
396 | ||
712ae480 PB |
397 | sigemptyset(&set); |
398 | sigaddset(&set, SIGIO); | |
399 | sigaddset(&set, SIGALRM); | |
712ae480 | 400 | sigaddset(&set, SIGBUS); |
5664aed9 | 401 | pthread_sigmask(SIG_BLOCK, &set, NULL); |
712ae480 PB |
402 | |
403 | sigfd = qemu_signalfd(&set); | |
d0f294ce JK |
404 | if (sigfd == -1) { |
405 | fprintf(stderr, "failed to create signalfd\n"); | |
406 | return -errno; | |
407 | } | |
408 | ||
409 | fcntl_setfl(sigfd, O_NONBLOCK); | |
410 | ||
411 | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, | |
e0efb993 | 412 | (void *)(intptr_t)sigfd); |
d0f294ce JK |
413 | |
414 | return 0; | |
415 | } | |
416 | ||
714bd040 PB |
417 | static void qemu_kvm_init_cpu_signals(CPUState *env) |
418 | { | |
419 | int r; | |
420 | sigset_t set; | |
421 | struct sigaction sigact; | |
422 | ||
423 | memset(&sigact, 0, sizeof(sigact)); | |
424 | sigact.sa_handler = dummy_signal; | |
425 | sigaction(SIG_IPI, &sigact, NULL); | |
426 | ||
714bd040 PB |
427 | pthread_sigmask(SIG_BLOCK, NULL, &set); |
428 | sigdelset(&set, SIG_IPI); | |
429 | sigdelset(&set, SIGBUS); | |
430 | r = kvm_set_signal_mask(env, &set); | |
431 | if (r) { | |
432 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
433 | exit(1); | |
434 | } | |
714bd040 | 435 | |
714bd040 PB |
436 | sigdelset(&set, SIG_IPI); |
437 | sigdelset(&set, SIGBUS); | |
438 | r = kvm_set_signal_mask(env, &set); | |
439 | if (r) { | |
440 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
441 | exit(1); | |
442 | } | |
443 | } | |
444 | ||
445 | static void qemu_tcg_init_cpu_signals(void) | |
446 | { | |
714bd040 PB |
447 | sigset_t set; |
448 | struct sigaction sigact; | |
449 | ||
450 | memset(&sigact, 0, sizeof(sigact)); | |
451 | sigact.sa_handler = cpu_signal; | |
452 | sigaction(SIG_IPI, &sigact, NULL); | |
453 | ||
454 | sigemptyset(&set); | |
455 | sigaddset(&set, SIG_IPI); | |
456 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
714bd040 PB |
457 | } |
458 | ||
55f8d6ac JK |
459 | #else /* _WIN32 */ |
460 | ||
296af7c9 BS |
461 | HANDLE qemu_event_handle; |
462 | ||
463 | static void dummy_event_handler(void *opaque) | |
464 | { | |
465 | } | |
466 | ||
467 | static int qemu_event_init(void) | |
468 | { | |
469 | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); | |
470 | if (!qemu_event_handle) { | |
471 | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError()); | |
472 | return -1; | |
473 | } | |
474 | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL); | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static void qemu_event_increment(void) | |
479 | { | |
480 | if (!SetEvent(qemu_event_handle)) { | |
481 | fprintf(stderr, "qemu_event_increment: SetEvent failed: %ld\n", | |
482 | GetLastError()); | |
483 | exit (1); | |
484 | } | |
485 | } | |
9a36085b | 486 | |
712ae480 PB |
487 | static int qemu_signal_init(void) |
488 | { | |
489 | return 0; | |
490 | } | |
491 | ||
ff48eb5f JK |
492 | static void qemu_kvm_init_cpu_signals(CPUState *env) |
493 | { | |
714bd040 PB |
494 | abort(); |
495 | } | |
ff48eb5f | 496 | |
714bd040 PB |
497 | static void qemu_tcg_init_cpu_signals(void) |
498 | { | |
ff48eb5f | 499 | } |
714bd040 | 500 | #endif /* _WIN32 */ |
ff48eb5f | 501 | |
296af7c9 | 502 | QemuMutex qemu_global_mutex; |
46daff13 PB |
503 | static QemuCond qemu_io_proceeded_cond; |
504 | static bool iothread_requesting_mutex; | |
296af7c9 BS |
505 | |
506 | static QemuThread io_thread; | |
507 | ||
508 | static QemuThread *tcg_cpu_thread; | |
509 | static QemuCond *tcg_halt_cond; | |
510 | ||
296af7c9 BS |
511 | /* cpu creation */ |
512 | static QemuCond qemu_cpu_cond; | |
513 | /* system init */ | |
296af7c9 | 514 | static QemuCond qemu_pause_cond; |
e82bcec2 | 515 | static QemuCond qemu_work_cond; |
296af7c9 | 516 | |
296af7c9 BS |
517 | int qemu_init_main_loop(void) |
518 | { | |
519 | int ret; | |
520 | ||
6d9cb73c | 521 | qemu_init_sigbus(); |
3c638d06 | 522 | |
712ae480 | 523 | ret = qemu_signal_init(); |
0ab07c62 | 524 | if (ret) { |
a8486bc9 | 525 | return ret; |
0ab07c62 | 526 | } |
a8486bc9 MT |
527 | |
528 | /* Note eventfd must be drained before signalfd handlers run */ | |
296af7c9 | 529 | ret = qemu_event_init(); |
0ab07c62 | 530 | if (ret) { |
296af7c9 | 531 | return ret; |
0ab07c62 | 532 | } |
296af7c9 | 533 | |
ed94592b | 534 | qemu_cond_init(&qemu_cpu_cond); |
ed94592b AL |
535 | qemu_cond_init(&qemu_pause_cond); |
536 | qemu_cond_init(&qemu_work_cond); | |
46daff13 | 537 | qemu_cond_init(&qemu_io_proceeded_cond); |
296af7c9 BS |
538 | qemu_mutex_init(&qemu_global_mutex); |
539 | qemu_mutex_lock(&qemu_global_mutex); | |
540 | ||
b7680cb6 | 541 | qemu_thread_get_self(&io_thread); |
296af7c9 BS |
542 | |
543 | return 0; | |
544 | } | |
545 | ||
7277e027 BS |
546 | void qemu_main_loop_start(void) |
547 | { | |
fa7d1867 | 548 | resume_all_vcpus(); |
7277e027 BS |
549 | } |
550 | ||
e82bcec2 MT |
551 | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
552 | { | |
553 | struct qemu_work_item wi; | |
554 | ||
b7680cb6 | 555 | if (qemu_cpu_is_self(env)) { |
e82bcec2 MT |
556 | func(data); |
557 | return; | |
558 | } | |
559 | ||
560 | wi.func = func; | |
561 | wi.data = data; | |
0ab07c62 | 562 | if (!env->queued_work_first) { |
e82bcec2 | 563 | env->queued_work_first = &wi; |
0ab07c62 | 564 | } else { |
e82bcec2 | 565 | env->queued_work_last->next = &wi; |
0ab07c62 | 566 | } |
e82bcec2 MT |
567 | env->queued_work_last = &wi; |
568 | wi.next = NULL; | |
569 | wi.done = false; | |
570 | ||
571 | qemu_cpu_kick(env); | |
572 | while (!wi.done) { | |
573 | CPUState *self_env = cpu_single_env; | |
574 | ||
575 | qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); | |
576 | cpu_single_env = self_env; | |
577 | } | |
578 | } | |
579 | ||
580 | static void flush_queued_work(CPUState *env) | |
581 | { | |
582 | struct qemu_work_item *wi; | |
583 | ||
0ab07c62 | 584 | if (!env->queued_work_first) { |
e82bcec2 | 585 | return; |
0ab07c62 | 586 | } |
e82bcec2 MT |
587 | |
588 | while ((wi = env->queued_work_first)) { | |
589 | env->queued_work_first = wi->next; | |
590 | wi->func(wi->data); | |
591 | wi->done = true; | |
592 | } | |
593 | env->queued_work_last = NULL; | |
594 | qemu_cond_broadcast(&qemu_work_cond); | |
595 | } | |
596 | ||
296af7c9 BS |
597 | static void qemu_wait_io_event_common(CPUState *env) |
598 | { | |
599 | if (env->stop) { | |
600 | env->stop = 0; | |
601 | env->stopped = 1; | |
602 | qemu_cond_signal(&qemu_pause_cond); | |
603 | } | |
e82bcec2 | 604 | flush_queued_work(env); |
aa2c364b | 605 | env->thread_kicked = false; |
296af7c9 BS |
606 | } |
607 | ||
6cabe1f3 | 608 | static void qemu_tcg_wait_io_event(void) |
296af7c9 | 609 | { |
6cabe1f3 JK |
610 | CPUState *env; |
611 | ||
16400322 | 612 | while (all_cpu_threads_idle()) { |
ab33fcda PB |
613 | /* Start accounting real time to the virtual clock if the CPUs |
614 | are idle. */ | |
615 | qemu_clock_warp(vm_clock); | |
9705fbb5 | 616 | qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); |
16400322 | 617 | } |
296af7c9 | 618 | |
46daff13 PB |
619 | while (iothread_requesting_mutex) { |
620 | qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex); | |
621 | } | |
6cabe1f3 JK |
622 | |
623 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
624 | qemu_wait_io_event_common(env); | |
625 | } | |
296af7c9 BS |
626 | } |
627 | ||
296af7c9 BS |
628 | static void qemu_kvm_wait_io_event(CPUState *env) |
629 | { | |
16400322 | 630 | while (cpu_thread_is_idle(env)) { |
9705fbb5 | 631 | qemu_cond_wait(env->halt_cond, &qemu_global_mutex); |
16400322 | 632 | } |
296af7c9 | 633 | |
5db5bdac | 634 | qemu_kvm_eat_signals(env); |
296af7c9 BS |
635 | qemu_wait_io_event_common(env); |
636 | } | |
637 | ||
7e97cd88 | 638 | static void *qemu_kvm_cpu_thread_fn(void *arg) |
296af7c9 BS |
639 | { |
640 | CPUState *env = arg; | |
84b4915d | 641 | int r; |
296af7c9 | 642 | |
6164e6d6 | 643 | qemu_mutex_lock(&qemu_global_mutex); |
b7680cb6 | 644 | qemu_thread_get_self(env->thread); |
dc7a09cf | 645 | env->thread_id = qemu_get_thread_id(); |
296af7c9 | 646 | |
84b4915d JK |
647 | r = kvm_init_vcpu(env); |
648 | if (r < 0) { | |
649 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
650 | exit(1); | |
651 | } | |
296af7c9 | 652 | |
55f8d6ac | 653 | qemu_kvm_init_cpu_signals(env); |
296af7c9 BS |
654 | |
655 | /* signal CPU creation */ | |
296af7c9 BS |
656 | env->created = 1; |
657 | qemu_cond_signal(&qemu_cpu_cond); | |
658 | ||
296af7c9 | 659 | while (1) { |
0ab07c62 | 660 | if (cpu_can_run(env)) { |
6792a57b | 661 | r = kvm_cpu_exec(env); |
83f338f7 | 662 | if (r == EXCP_DEBUG) { |
1009d2ed | 663 | cpu_handle_guest_debug(env); |
83f338f7 | 664 | } |
0ab07c62 | 665 | } |
296af7c9 BS |
666 | qemu_kvm_wait_io_event(env); |
667 | } | |
668 | ||
669 | return NULL; | |
670 | } | |
671 | ||
7e97cd88 | 672 | static void *qemu_tcg_cpu_thread_fn(void *arg) |
296af7c9 BS |
673 | { |
674 | CPUState *env = arg; | |
675 | ||
55f8d6ac | 676 | qemu_tcg_init_cpu_signals(); |
b7680cb6 | 677 | qemu_thread_get_self(env->thread); |
296af7c9 BS |
678 | |
679 | /* signal CPU creation */ | |
680 | qemu_mutex_lock(&qemu_global_mutex); | |
0ab07c62 | 681 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
dc7a09cf | 682 | env->thread_id = qemu_get_thread_id(); |
296af7c9 | 683 | env->created = 1; |
0ab07c62 | 684 | } |
296af7c9 BS |
685 | qemu_cond_signal(&qemu_cpu_cond); |
686 | ||
fa7d1867 JK |
687 | /* wait for initial kick-off after machine start */ |
688 | while (first_cpu->stopped) { | |
689 | qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); | |
0ab07c62 | 690 | } |
296af7c9 BS |
691 | |
692 | while (1) { | |
472fb0c4 | 693 | cpu_exec_all(); |
cb842c90 | 694 | if (use_icount && qemu_next_icount_deadline() <= 0) { |
3b2319a3 PB |
695 | qemu_notify_event(); |
696 | } | |
6cabe1f3 | 697 | qemu_tcg_wait_io_event(); |
296af7c9 BS |
698 | } |
699 | ||
700 | return NULL; | |
701 | } | |
702 | ||
cc015e9a PB |
703 | static void qemu_cpu_kick_thread(CPUState *env) |
704 | { | |
705 | #ifndef _WIN32 | |
706 | int err; | |
707 | ||
708 | err = pthread_kill(env->thread->thread, SIG_IPI); | |
709 | if (err) { | |
710 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); | |
711 | exit(1); | |
712 | } | |
713 | #else /* _WIN32 */ | |
714 | if (!qemu_cpu_is_self(env)) { | |
715 | SuspendThread(env->thread->thread); | |
716 | cpu_signal(0); | |
717 | ResumeThread(env->thread->thread); | |
718 | } | |
719 | #endif | |
720 | } | |
721 | ||
296af7c9 BS |
722 | void qemu_cpu_kick(void *_env) |
723 | { | |
724 | CPUState *env = _env; | |
296af7c9 | 725 | |
296af7c9 | 726 | qemu_cond_broadcast(env->halt_cond); |
eae74cf9 | 727 | if (kvm_enabled() && !env->thread_kicked) { |
cc015e9a | 728 | qemu_cpu_kick_thread(env); |
aa2c364b JK |
729 | env->thread_kicked = true; |
730 | } | |
296af7c9 BS |
731 | } |
732 | ||
46d62fac | 733 | void qemu_cpu_kick_self(void) |
296af7c9 | 734 | { |
b55c22c6 | 735 | #ifndef _WIN32 |
46d62fac | 736 | assert(cpu_single_env); |
296af7c9 | 737 | |
46d62fac | 738 | if (!cpu_single_env->thread_kicked) { |
cc015e9a | 739 | qemu_cpu_kick_thread(cpu_single_env); |
46d62fac | 740 | cpu_single_env->thread_kicked = true; |
296af7c9 | 741 | } |
b55c22c6 PB |
742 | #else |
743 | abort(); | |
744 | #endif | |
296af7c9 BS |
745 | } |
746 | ||
b7680cb6 | 747 | int qemu_cpu_is_self(void *_env) |
296af7c9 | 748 | { |
296af7c9 | 749 | CPUState *env = _env; |
a8486bc9 | 750 | |
b7680cb6 | 751 | return qemu_thread_is_self(env->thread); |
296af7c9 BS |
752 | } |
753 | ||
296af7c9 BS |
754 | void qemu_mutex_lock_iothread(void) |
755 | { | |
756 | if (kvm_enabled()) { | |
296af7c9 | 757 | qemu_mutex_lock(&qemu_global_mutex); |
1a28cac3 | 758 | } else { |
46daff13 | 759 | iothread_requesting_mutex = true; |
1a28cac3 | 760 | if (qemu_mutex_trylock(&qemu_global_mutex)) { |
cc015e9a | 761 | qemu_cpu_kick_thread(first_cpu); |
1a28cac3 MT |
762 | qemu_mutex_lock(&qemu_global_mutex); |
763 | } | |
46daff13 PB |
764 | iothread_requesting_mutex = false; |
765 | qemu_cond_broadcast(&qemu_io_proceeded_cond); | |
1a28cac3 | 766 | } |
296af7c9 BS |
767 | } |
768 | ||
769 | void qemu_mutex_unlock_iothread(void) | |
770 | { | |
771 | qemu_mutex_unlock(&qemu_global_mutex); | |
772 | } | |
773 | ||
774 | static int all_vcpus_paused(void) | |
775 | { | |
776 | CPUState *penv = first_cpu; | |
777 | ||
778 | while (penv) { | |
0ab07c62 | 779 | if (!penv->stopped) { |
296af7c9 | 780 | return 0; |
0ab07c62 | 781 | } |
296af7c9 BS |
782 | penv = (CPUState *)penv->next_cpu; |
783 | } | |
784 | ||
785 | return 1; | |
786 | } | |
787 | ||
788 | void pause_all_vcpus(void) | |
789 | { | |
790 | CPUState *penv = first_cpu; | |
791 | ||
792 | while (penv) { | |
793 | penv->stop = 1; | |
296af7c9 BS |
794 | qemu_cpu_kick(penv); |
795 | penv = (CPUState *)penv->next_cpu; | |
796 | } | |
797 | ||
798 | while (!all_vcpus_paused()) { | |
be7d6c57 | 799 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); |
296af7c9 BS |
800 | penv = first_cpu; |
801 | while (penv) { | |
1fbb22e5 | 802 | qemu_cpu_kick(penv); |
296af7c9 BS |
803 | penv = (CPUState *)penv->next_cpu; |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | void resume_all_vcpus(void) | |
809 | { | |
810 | CPUState *penv = first_cpu; | |
811 | ||
812 | while (penv) { | |
813 | penv->stop = 0; | |
814 | penv->stopped = 0; | |
296af7c9 BS |
815 | qemu_cpu_kick(penv); |
816 | penv = (CPUState *)penv->next_cpu; | |
817 | } | |
818 | } | |
819 | ||
7e97cd88 | 820 | static void qemu_tcg_init_vcpu(void *_env) |
296af7c9 BS |
821 | { |
822 | CPUState *env = _env; | |
0ab07c62 | 823 | |
296af7c9 BS |
824 | /* share a single thread for all cpus with TCG */ |
825 | if (!tcg_cpu_thread) { | |
7267c094 AL |
826 | env->thread = g_malloc0(sizeof(QemuThread)); |
827 | env->halt_cond = g_malloc0(sizeof(QemuCond)); | |
296af7c9 | 828 | qemu_cond_init(env->halt_cond); |
fa7d1867 | 829 | tcg_halt_cond = env->halt_cond; |
7e97cd88 | 830 | qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env); |
0ab07c62 | 831 | while (env->created == 0) { |
18a85728 | 832 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
0ab07c62 | 833 | } |
296af7c9 | 834 | tcg_cpu_thread = env->thread; |
296af7c9 BS |
835 | } else { |
836 | env->thread = tcg_cpu_thread; | |
837 | env->halt_cond = tcg_halt_cond; | |
838 | } | |
839 | } | |
840 | ||
7e97cd88 | 841 | static void qemu_kvm_start_vcpu(CPUState *env) |
296af7c9 | 842 | { |
7267c094 AL |
843 | env->thread = g_malloc0(sizeof(QemuThread)); |
844 | env->halt_cond = g_malloc0(sizeof(QemuCond)); | |
296af7c9 | 845 | qemu_cond_init(env->halt_cond); |
7e97cd88 | 846 | qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env); |
0ab07c62 | 847 | while (env->created == 0) { |
18a85728 | 848 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); |
0ab07c62 | 849 | } |
296af7c9 BS |
850 | } |
851 | ||
852 | void qemu_init_vcpu(void *_env) | |
853 | { | |
854 | CPUState *env = _env; | |
855 | ||
856 | env->nr_cores = smp_cores; | |
857 | env->nr_threads = smp_threads; | |
fa7d1867 | 858 | env->stopped = 1; |
0ab07c62 | 859 | if (kvm_enabled()) { |
7e97cd88 | 860 | qemu_kvm_start_vcpu(env); |
0ab07c62 | 861 | } else { |
7e97cd88 | 862 | qemu_tcg_init_vcpu(env); |
0ab07c62 | 863 | } |
296af7c9 BS |
864 | } |
865 | ||
866 | void qemu_notify_event(void) | |
867 | { | |
868 | qemu_event_increment(); | |
869 | } | |
870 | ||
b4a3d965 | 871 | void cpu_stop_current(void) |
296af7c9 | 872 | { |
b4a3d965 | 873 | if (cpu_single_env) { |
67bb172f | 874 | cpu_single_env->stop = 0; |
b4a3d965 JK |
875 | cpu_single_env->stopped = 1; |
876 | cpu_exit(cpu_single_env); | |
67bb172f | 877 | qemu_cond_signal(&qemu_pause_cond); |
b4a3d965 | 878 | } |
296af7c9 BS |
879 | } |
880 | ||
881 | void vm_stop(int reason) | |
882 | { | |
b7680cb6 | 883 | if (!qemu_thread_is_self(&io_thread)) { |
296af7c9 BS |
884 | qemu_system_vmstop_request(reason); |
885 | /* | |
886 | * FIXME: should not return to device code in case | |
887 | * vm_stop() has been requested. | |
888 | */ | |
b4a3d965 | 889 | cpu_stop_current(); |
296af7c9 BS |
890 | return; |
891 | } | |
892 | do_vm_stop(reason); | |
893 | } | |
894 | ||
6792a57b | 895 | static int tcg_cpu_exec(CPUState *env) |
296af7c9 BS |
896 | { |
897 | int ret; | |
898 | #ifdef CONFIG_PROFILER | |
899 | int64_t ti; | |
900 | #endif | |
901 | ||
902 | #ifdef CONFIG_PROFILER | |
903 | ti = profile_getclock(); | |
904 | #endif | |
905 | if (use_icount) { | |
906 | int64_t count; | |
907 | int decr; | |
908 | qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); | |
909 | env->icount_decr.u16.low = 0; | |
910 | env->icount_extra = 0; | |
cb842c90 | 911 | count = qemu_icount_round(qemu_next_icount_deadline()); |
296af7c9 BS |
912 | qemu_icount += count; |
913 | decr = (count > 0xffff) ? 0xffff : count; | |
914 | count -= decr; | |
915 | env->icount_decr.u16.low = decr; | |
916 | env->icount_extra = count; | |
917 | } | |
918 | ret = cpu_exec(env); | |
919 | #ifdef CONFIG_PROFILER | |
920 | qemu_time += profile_getclock() - ti; | |
921 | #endif | |
922 | if (use_icount) { | |
923 | /* Fold pending instructions back into the | |
924 | instruction counter, and clear the interrupt flag. */ | |
925 | qemu_icount -= (env->icount_decr.u16.low | |
926 | + env->icount_extra); | |
927 | env->icount_decr.u32 = 0; | |
928 | env->icount_extra = 0; | |
929 | } | |
930 | return ret; | |
931 | } | |
932 | ||
472fb0c4 | 933 | bool cpu_exec_all(void) |
296af7c9 | 934 | { |
9a36085b JK |
935 | int r; |
936 | ||
ab33fcda PB |
937 | /* Account partial waits to the vm_clock. */ |
938 | qemu_clock_warp(vm_clock); | |
939 | ||
0ab07c62 | 940 | if (next_cpu == NULL) { |
296af7c9 | 941 | next_cpu = first_cpu; |
0ab07c62 | 942 | } |
c629a4bc | 943 | for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
345f4426 | 944 | CPUState *env = next_cpu; |
296af7c9 BS |
945 | |
946 | qemu_clock_enable(vm_clock, | |
345f4426 | 947 | (env->singlestep_enabled & SSTEP_NOTIMER) == 0); |
296af7c9 | 948 | |
3c638d06 | 949 | if (cpu_can_run(env)) { |
9a36085b | 950 | if (kvm_enabled()) { |
6792a57b | 951 | r = kvm_cpu_exec(env); |
9a36085b | 952 | qemu_kvm_eat_signals(env); |
6792a57b JK |
953 | } else { |
954 | r = tcg_cpu_exec(env); | |
9a36085b JK |
955 | } |
956 | if (r == EXCP_DEBUG) { | |
1009d2ed | 957 | cpu_handle_guest_debug(env); |
3c638d06 JK |
958 | break; |
959 | } | |
df646dfd | 960 | } else if (env->stop || env->stopped) { |
296af7c9 BS |
961 | break; |
962 | } | |
963 | } | |
c629a4bc | 964 | exit_request = 0; |
16400322 | 965 | return !all_cpu_threads_idle(); |
296af7c9 BS |
966 | } |
967 | ||
968 | void set_numa_modes(void) | |
969 | { | |
970 | CPUState *env; | |
971 | int i; | |
972 | ||
973 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
974 | for (i = 0; i < nb_numa_nodes; i++) { | |
975 | if (node_cpumask[i] & (1 << env->cpu_index)) { | |
976 | env->numa_node = i; | |
977 | } | |
978 | } | |
979 | } | |
980 | } | |
981 | ||
982 | void set_cpu_log(const char *optarg) | |
983 | { | |
984 | int mask; | |
985 | const CPULogItem *item; | |
986 | ||
987 | mask = cpu_str_to_log_mask(optarg); | |
988 | if (!mask) { | |
989 | printf("Log items (comma separated):\n"); | |
990 | for (item = cpu_log_items; item->mask != 0; item++) { | |
991 | printf("%-10s %s\n", item->name, item->help); | |
992 | } | |
993 | exit(1); | |
994 | } | |
995 | cpu_set_log(mask); | |
996 | } | |
29e922b6 | 997 | |
c235d738 MF |
998 | void set_cpu_log_filename(const char *optarg) |
999 | { | |
1000 | cpu_set_log_filename(optarg); | |
1001 | } | |
1002 | ||
29e922b6 BS |
1003 | /* Return the virtual CPU time, based on the instruction counter. */ |
1004 | int64_t cpu_get_icount(void) | |
1005 | { | |
1006 | int64_t icount; | |
1007 | CPUState *env = cpu_single_env;; | |
1008 | ||
1009 | icount = qemu_icount; | |
1010 | if (env) { | |
1011 | if (!can_do_io(env)) { | |
1012 | fprintf(stderr, "Bad clock read\n"); | |
1013 | } | |
1014 | icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1015 | } | |
1016 | return qemu_icount_bias + (icount << icount_time_shift); | |
1017 | } | |
262353cb | 1018 | |
9a78eead | 1019 | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
262353cb BS |
1020 | { |
1021 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
1022 | #if defined(cpu_list_id) | |
1023 | cpu_list_id(f, cpu_fprintf, optarg); | |
1024 | #elif defined(cpu_list) | |
1025 | cpu_list(f, cpu_fprintf); /* deprecated */ | |
1026 | #endif | |
1027 | } |