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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" | |
262ea18e | 33 | #include "exec-all.h" |
296af7c9 BS |
34 | |
35 | #include "cpus.h" | |
a8486bc9 | 36 | #include "compatfd.h" |
296af7c9 | 37 | |
7277e027 BS |
38 | #ifdef SIGRTMIN |
39 | #define SIG_IPI (SIGRTMIN+4) | |
40 | #else | |
41 | #define SIG_IPI SIGUSR1 | |
42 | #endif | |
43 | ||
6d9cb73c JK |
44 | #ifdef CONFIG_LINUX |
45 | ||
46 | #include <sys/prctl.h> | |
47 | ||
c0532a76 MT |
48 | #ifndef PR_MCE_KILL |
49 | #define PR_MCE_KILL 33 | |
50 | #endif | |
51 | ||
6d9cb73c JK |
52 | #ifndef PR_MCE_KILL_SET |
53 | #define PR_MCE_KILL_SET 1 | |
54 | #endif | |
55 | ||
56 | #ifndef PR_MCE_KILL_EARLY | |
57 | #define PR_MCE_KILL_EARLY 1 | |
58 | #endif | |
59 | ||
60 | #endif /* CONFIG_LINUX */ | |
61 | ||
296af7c9 BS |
62 | static CPUState *next_cpu; |
63 | ||
64 | /***********************************************************/ | |
65 | void hw_error(const char *fmt, ...) | |
66 | { | |
67 | va_list ap; | |
68 | CPUState *env; | |
69 | ||
70 | va_start(ap, fmt); | |
71 | fprintf(stderr, "qemu: hardware error: "); | |
72 | vfprintf(stderr, fmt, ap); | |
73 | fprintf(stderr, "\n"); | |
74 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
75 | fprintf(stderr, "CPU #%d:\n", env->cpu_index); | |
76 | #ifdef TARGET_I386 | |
77 | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU); | |
78 | #else | |
79 | cpu_dump_state(env, stderr, fprintf, 0); | |
80 | #endif | |
81 | } | |
82 | va_end(ap); | |
83 | abort(); | |
84 | } | |
85 | ||
86 | void cpu_synchronize_all_states(void) | |
87 | { | |
88 | CPUState *cpu; | |
89 | ||
90 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
91 | cpu_synchronize_state(cpu); | |
92 | } | |
93 | } | |
94 | ||
95 | void cpu_synchronize_all_post_reset(void) | |
96 | { | |
97 | CPUState *cpu; | |
98 | ||
99 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
100 | cpu_synchronize_post_reset(cpu); | |
101 | } | |
102 | } | |
103 | ||
104 | void cpu_synchronize_all_post_init(void) | |
105 | { | |
106 | CPUState *cpu; | |
107 | ||
108 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
109 | cpu_synchronize_post_init(cpu); | |
110 | } | |
111 | } | |
112 | ||
3ae9501c MT |
113 | int cpu_is_stopped(CPUState *env) |
114 | { | |
115 | return !vm_running || env->stopped; | |
116 | } | |
117 | ||
296af7c9 BS |
118 | static void do_vm_stop(int reason) |
119 | { | |
120 | if (vm_running) { | |
121 | cpu_disable_ticks(); | |
122 | vm_running = 0; | |
123 | pause_all_vcpus(); | |
124 | vm_state_notify(0, reason); | |
55df6f33 MT |
125 | qemu_aio_flush(); |
126 | bdrv_flush_all(); | |
296af7c9 BS |
127 | monitor_protocol_event(QEVENT_STOP, NULL); |
128 | } | |
129 | } | |
130 | ||
131 | static int cpu_can_run(CPUState *env) | |
132 | { | |
0ab07c62 | 133 | if (env->stop) { |
296af7c9 | 134 | return 0; |
0ab07c62 JK |
135 | } |
136 | if (env->stopped || !vm_running) { | |
296af7c9 | 137 | return 0; |
0ab07c62 | 138 | } |
296af7c9 BS |
139 | return 1; |
140 | } | |
141 | ||
16400322 | 142 | static bool cpu_thread_is_idle(CPUState *env) |
296af7c9 | 143 | { |
16400322 JK |
144 | if (env->stop || env->queued_work_first) { |
145 | return false; | |
146 | } | |
147 | if (env->stopped || !vm_running) { | |
148 | return true; | |
149 | } | |
150 | if (!env->halted || qemu_cpu_has_work(env)) { | |
151 | return false; | |
152 | } | |
153 | return true; | |
296af7c9 BS |
154 | } |
155 | ||
16400322 | 156 | static bool all_cpu_threads_idle(void) |
296af7c9 BS |
157 | { |
158 | CPUState *env; | |
159 | ||
16400322 JK |
160 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
161 | if (!cpu_thread_is_idle(env)) { | |
162 | return false; | |
163 | } | |
164 | } | |
165 | return true; | |
296af7c9 BS |
166 | } |
167 | ||
3c638d06 JK |
168 | static void cpu_debug_handler(CPUState *env) |
169 | { | |
170 | gdb_set_stop_cpu(env); | |
8cf71710 | 171 | qemu_system_debug_request(); |
3c638d06 JK |
172 | } |
173 | ||
6d9cb73c JK |
174 | #ifdef CONFIG_LINUX |
175 | static void sigbus_reraise(void) | |
176 | { | |
177 | sigset_t set; | |
178 | struct sigaction action; | |
179 | ||
180 | memset(&action, 0, sizeof(action)); | |
181 | action.sa_handler = SIG_DFL; | |
182 | if (!sigaction(SIGBUS, &action, NULL)) { | |
183 | raise(SIGBUS); | |
184 | sigemptyset(&set); | |
185 | sigaddset(&set, SIGBUS); | |
186 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
187 | } | |
188 | perror("Failed to re-raise SIGBUS!\n"); | |
189 | abort(); | |
190 | } | |
191 | ||
192 | static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, | |
193 | void *ctx) | |
194 | { | |
195 | if (kvm_on_sigbus(siginfo->ssi_code, | |
196 | (void *)(intptr_t)siginfo->ssi_addr)) { | |
197 | sigbus_reraise(); | |
198 | } | |
199 | } | |
200 | ||
201 | static void qemu_init_sigbus(void) | |
202 | { | |
203 | struct sigaction action; | |
204 | ||
205 | memset(&action, 0, sizeof(action)); | |
206 | action.sa_flags = SA_SIGINFO; | |
207 | action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; | |
208 | sigaction(SIGBUS, &action, NULL); | |
209 | ||
210 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
211 | } | |
212 | ||
213 | #else /* !CONFIG_LINUX */ | |
214 | ||
215 | static void qemu_init_sigbus(void) | |
216 | { | |
217 | } | |
218 | #endif /* !CONFIG_LINUX */ | |
219 | ||
296af7c9 BS |
220 | #ifndef _WIN32 |
221 | static int io_thread_fd = -1; | |
222 | ||
223 | static void qemu_event_increment(void) | |
224 | { | |
225 | /* Write 8 bytes to be compatible with eventfd. */ | |
26a82330 | 226 | static const uint64_t val = 1; |
296af7c9 BS |
227 | ssize_t ret; |
228 | ||
0ab07c62 | 229 | if (io_thread_fd == -1) { |
296af7c9 | 230 | return; |
0ab07c62 | 231 | } |
296af7c9 BS |
232 | do { |
233 | ret = write(io_thread_fd, &val, sizeof(val)); | |
234 | } while (ret < 0 && errno == EINTR); | |
235 | ||
236 | /* EAGAIN is fine, a read must be pending. */ | |
237 | if (ret < 0 && errno != EAGAIN) { | |
238 | fprintf(stderr, "qemu_event_increment: write() filed: %s\n", | |
239 | strerror(errno)); | |
240 | exit (1); | |
241 | } | |
242 | } | |
243 | ||
244 | static void qemu_event_read(void *opaque) | |
245 | { | |
246 | int fd = (unsigned long)opaque; | |
247 | ssize_t len; | |
248 | char buffer[512]; | |
249 | ||
250 | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */ | |
251 | do { | |
252 | len = read(fd, buffer, sizeof(buffer)); | |
253 | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); | |
254 | } | |
255 | ||
256 | static int qemu_event_init(void) | |
257 | { | |
258 | int err; | |
259 | int fds[2]; | |
260 | ||
261 | err = qemu_eventfd(fds); | |
0ab07c62 | 262 | if (err == -1) { |
296af7c9 | 263 | return -errno; |
0ab07c62 | 264 | } |
296af7c9 | 265 | err = fcntl_setfl(fds[0], O_NONBLOCK); |
0ab07c62 | 266 | if (err < 0) { |
296af7c9 | 267 | goto fail; |
0ab07c62 | 268 | } |
296af7c9 | 269 | err = fcntl_setfl(fds[1], O_NONBLOCK); |
0ab07c62 | 270 | if (err < 0) { |
296af7c9 | 271 | goto fail; |
0ab07c62 | 272 | } |
296af7c9 BS |
273 | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
274 | (void *)(unsigned long)fds[0]); | |
275 | ||
276 | io_thread_fd = fds[1]; | |
277 | return 0; | |
278 | ||
279 | fail: | |
280 | close(fds[0]); | |
281 | close(fds[1]); | |
282 | return err; | |
283 | } | |
55f8d6ac | 284 | |
55f8d6ac JK |
285 | static void dummy_signal(int sig) |
286 | { | |
287 | } | |
55f8d6ac | 288 | |
d0f294ce JK |
289 | /* If we have signalfd, we mask out the signals we want to handle and then |
290 | * use signalfd to listen for them. We rely on whatever the current signal | |
291 | * handler is to dispatch the signals when we receive them. | |
292 | */ | |
293 | static void sigfd_handler(void *opaque) | |
294 | { | |
295 | int fd = (unsigned long) opaque; | |
296 | struct qemu_signalfd_siginfo info; | |
297 | struct sigaction action; | |
298 | ssize_t len; | |
299 | ||
300 | while (1) { | |
301 | do { | |
302 | len = read(fd, &info, sizeof(info)); | |
303 | } while (len == -1 && errno == EINTR); | |
304 | ||
305 | if (len == -1 && errno == EAGAIN) { | |
306 | break; | |
307 | } | |
308 | ||
309 | if (len != sizeof(info)) { | |
310 | printf("read from sigfd returned %zd: %m\n", len); | |
311 | return; | |
312 | } | |
313 | ||
314 | sigaction(info.ssi_signo, NULL, &action); | |
315 | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) { | |
316 | action.sa_sigaction(info.ssi_signo, | |
317 | (siginfo_t *)&info, NULL); | |
318 | } else if (action.sa_handler) { | |
319 | action.sa_handler(info.ssi_signo); | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | static int qemu_signalfd_init(sigset_t mask) | |
325 | { | |
326 | int sigfd; | |
327 | ||
328 | sigfd = qemu_signalfd(&mask); | |
329 | if (sigfd == -1) { | |
330 | fprintf(stderr, "failed to create signalfd\n"); | |
331 | return -errno; | |
332 | } | |
333 | ||
334 | fcntl_setfl(sigfd, O_NONBLOCK); | |
335 | ||
336 | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, | |
337 | (void *)(unsigned long) sigfd); | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
9a36085b JK |
342 | static void qemu_kvm_eat_signals(CPUState *env) |
343 | { | |
344 | struct timespec ts = { 0, 0 }; | |
345 | siginfo_t siginfo; | |
346 | sigset_t waitset; | |
347 | sigset_t chkset; | |
348 | int r; | |
349 | ||
350 | sigemptyset(&waitset); | |
351 | sigaddset(&waitset, SIG_IPI); | |
352 | sigaddset(&waitset, SIGBUS); | |
353 | ||
354 | do { | |
355 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
356 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
357 | perror("sigtimedwait"); | |
358 | exit(1); | |
359 | } | |
360 | ||
361 | switch (r) { | |
9a36085b JK |
362 | case SIGBUS: |
363 | if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) { | |
364 | sigbus_reraise(); | |
365 | } | |
366 | break; | |
9a36085b JK |
367 | default: |
368 | break; | |
369 | } | |
370 | ||
371 | r = sigpending(&chkset); | |
372 | if (r == -1) { | |
373 | perror("sigpending"); | |
374 | exit(1); | |
375 | } | |
376 | } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS)); | |
de758970 JK |
377 | |
378 | #ifndef CONFIG_IOTHREAD | |
379 | if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) { | |
380 | qemu_notify_event(); | |
381 | } | |
382 | #endif | |
9a36085b JK |
383 | } |
384 | ||
55f8d6ac JK |
385 | #else /* _WIN32 */ |
386 | ||
296af7c9 BS |
387 | HANDLE qemu_event_handle; |
388 | ||
389 | static void dummy_event_handler(void *opaque) | |
390 | { | |
391 | } | |
392 | ||
393 | static int qemu_event_init(void) | |
394 | { | |
395 | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); | |
396 | if (!qemu_event_handle) { | |
397 | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError()); | |
398 | return -1; | |
399 | } | |
400 | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static void qemu_event_increment(void) | |
405 | { | |
406 | if (!SetEvent(qemu_event_handle)) { | |
407 | fprintf(stderr, "qemu_event_increment: SetEvent failed: %ld\n", | |
408 | GetLastError()); | |
409 | exit (1); | |
410 | } | |
411 | } | |
9a36085b JK |
412 | |
413 | static void qemu_kvm_eat_signals(CPUState *env) | |
414 | { | |
415 | } | |
55f8d6ac | 416 | #endif /* _WIN32 */ |
296af7c9 BS |
417 | |
418 | #ifndef CONFIG_IOTHREAD | |
ff48eb5f JK |
419 | static void qemu_kvm_init_cpu_signals(CPUState *env) |
420 | { | |
421 | #ifndef _WIN32 | |
422 | int r; | |
423 | sigset_t set; | |
424 | struct sigaction sigact; | |
425 | ||
426 | memset(&sigact, 0, sizeof(sigact)); | |
427 | sigact.sa_handler = dummy_signal; | |
428 | sigaction(SIG_IPI, &sigact, NULL); | |
429 | ||
430 | sigemptyset(&set); | |
431 | sigaddset(&set, SIG_IPI); | |
de758970 JK |
432 | sigaddset(&set, SIGIO); |
433 | sigaddset(&set, SIGALRM); | |
ff48eb5f JK |
434 | pthread_sigmask(SIG_BLOCK, &set, NULL); |
435 | ||
436 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
437 | sigdelset(&set, SIG_IPI); | |
438 | sigdelset(&set, SIGBUS); | |
de758970 JK |
439 | sigdelset(&set, SIGIO); |
440 | sigdelset(&set, SIGALRM); | |
ff48eb5f JK |
441 | r = kvm_set_signal_mask(env, &set); |
442 | if (r) { | |
443 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
444 | exit(1); | |
445 | } | |
446 | #endif | |
447 | } | |
448 | ||
de758970 JK |
449 | #ifndef _WIN32 |
450 | static sigset_t block_synchronous_signals(void) | |
451 | { | |
452 | sigset_t set; | |
453 | ||
454 | sigemptyset(&set); | |
6d9cb73c | 455 | sigaddset(&set, SIGBUS); |
de758970 JK |
456 | if (kvm_enabled()) { |
457 | /* | |
458 | * We need to process timer signals synchronously to avoid a race | |
459 | * between exit_request check and KVM vcpu entry. | |
460 | */ | |
461 | sigaddset(&set, SIGIO); | |
462 | sigaddset(&set, SIGALRM); | |
463 | } | |
464 | ||
465 | return set; | |
466 | } | |
467 | #endif | |
468 | ||
296af7c9 BS |
469 | int qemu_init_main_loop(void) |
470 | { | |
d0f294ce JK |
471 | #ifndef _WIN32 |
472 | sigset_t blocked_signals; | |
473 | int ret; | |
474 | ||
de758970 | 475 | blocked_signals = block_synchronous_signals(); |
d0f294ce JK |
476 | |
477 | ret = qemu_signalfd_init(blocked_signals); | |
478 | if (ret) { | |
479 | return ret; | |
480 | } | |
481 | #endif | |
3c638d06 JK |
482 | cpu_set_debug_excp_handler(cpu_debug_handler); |
483 | ||
6d9cb73c JK |
484 | qemu_init_sigbus(); |
485 | ||
296af7c9 BS |
486 | return qemu_event_init(); |
487 | } | |
488 | ||
7277e027 BS |
489 | void qemu_main_loop_start(void) |
490 | { | |
491 | } | |
492 | ||
296af7c9 BS |
493 | void qemu_init_vcpu(void *_env) |
494 | { | |
495 | CPUState *env = _env; | |
84b4915d | 496 | int r; |
296af7c9 BS |
497 | |
498 | env->nr_cores = smp_cores; | |
499 | env->nr_threads = smp_threads; | |
84b4915d JK |
500 | |
501 | if (kvm_enabled()) { | |
502 | r = kvm_init_vcpu(env); | |
503 | if (r < 0) { | |
504 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
505 | exit(1); | |
506 | } | |
ff48eb5f | 507 | qemu_kvm_init_cpu_signals(env); |
84b4915d | 508 | } |
296af7c9 BS |
509 | } |
510 | ||
511 | int qemu_cpu_self(void *env) | |
512 | { | |
513 | return 1; | |
514 | } | |
515 | ||
e82bcec2 MT |
516 | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
517 | { | |
518 | func(data); | |
519 | } | |
520 | ||
296af7c9 BS |
521 | void resume_all_vcpus(void) |
522 | { | |
523 | } | |
524 | ||
525 | void pause_all_vcpus(void) | |
526 | { | |
527 | } | |
528 | ||
529 | void qemu_cpu_kick(void *env) | |
530 | { | |
296af7c9 BS |
531 | } |
532 | ||
46d62fac JK |
533 | void qemu_cpu_kick_self(void) |
534 | { | |
535 | #ifndef _WIN32 | |
536 | assert(cpu_single_env); | |
537 | ||
538 | raise(SIG_IPI); | |
539 | #else | |
540 | abort(); | |
541 | #endif | |
542 | } | |
543 | ||
296af7c9 BS |
544 | void qemu_notify_event(void) |
545 | { | |
546 | CPUState *env = cpu_single_env; | |
547 | ||
548 | qemu_event_increment (); | |
549 | if (env) { | |
550 | cpu_exit(env); | |
551 | } | |
552 | if (next_cpu && env != next_cpu) { | |
553 | cpu_exit(next_cpu); | |
554 | } | |
38145df2 | 555 | exit_request = 1; |
296af7c9 BS |
556 | } |
557 | ||
558 | void qemu_mutex_lock_iothread(void) {} | |
559 | void qemu_mutex_unlock_iothread(void) {} | |
560 | ||
b4a3d965 JK |
561 | void cpu_stop_current(void) |
562 | { | |
563 | } | |
564 | ||
296af7c9 BS |
565 | void vm_stop(int reason) |
566 | { | |
567 | do_vm_stop(reason); | |
568 | } | |
569 | ||
570 | #else /* CONFIG_IOTHREAD */ | |
571 | ||
572 | #include "qemu-thread.h" | |
573 | ||
574 | QemuMutex qemu_global_mutex; | |
575 | static QemuMutex qemu_fair_mutex; | |
576 | ||
577 | static QemuThread io_thread; | |
578 | ||
579 | static QemuThread *tcg_cpu_thread; | |
580 | static QemuCond *tcg_halt_cond; | |
581 | ||
582 | static int qemu_system_ready; | |
583 | /* cpu creation */ | |
584 | static QemuCond qemu_cpu_cond; | |
585 | /* system init */ | |
586 | static QemuCond qemu_system_cond; | |
587 | static QemuCond qemu_pause_cond; | |
e82bcec2 | 588 | static QemuCond qemu_work_cond; |
296af7c9 | 589 | |
55f8d6ac JK |
590 | static void cpu_signal(int sig) |
591 | { | |
592 | if (cpu_single_env) { | |
593 | cpu_exit(cpu_single_env); | |
594 | } | |
595 | exit_request = 1; | |
596 | } | |
597 | ||
598 | static void qemu_kvm_init_cpu_signals(CPUState *env) | |
599 | { | |
600 | int r; | |
601 | sigset_t set; | |
602 | struct sigaction sigact; | |
603 | ||
604 | memset(&sigact, 0, sizeof(sigact)); | |
605 | sigact.sa_handler = dummy_signal; | |
606 | sigaction(SIG_IPI, &sigact, NULL); | |
607 | ||
608 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
609 | sigdelset(&set, SIG_IPI); | |
610 | sigdelset(&set, SIGBUS); | |
611 | r = kvm_set_signal_mask(env, &set); | |
612 | if (r) { | |
613 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
614 | exit(1); | |
615 | } | |
616 | } | |
617 | ||
618 | static void qemu_tcg_init_cpu_signals(void) | |
619 | { | |
620 | sigset_t set; | |
621 | struct sigaction sigact; | |
622 | ||
623 | memset(&sigact, 0, sizeof(sigact)); | |
624 | sigact.sa_handler = cpu_signal; | |
625 | sigaction(SIG_IPI, &sigact, NULL); | |
626 | ||
627 | sigemptyset(&set); | |
628 | sigaddset(&set, SIG_IPI); | |
629 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
630 | } | |
631 | ||
55f8d6ac JK |
632 | static sigset_t block_io_signals(void) |
633 | { | |
634 | sigset_t set; | |
55f8d6ac JK |
635 | |
636 | /* SIGUSR2 used by posix-aio-compat.c */ | |
637 | sigemptyset(&set); | |
638 | sigaddset(&set, SIGUSR2); | |
639 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
640 | ||
641 | sigemptyset(&set); | |
642 | sigaddset(&set, SIGIO); | |
643 | sigaddset(&set, SIGALRM); | |
644 | sigaddset(&set, SIG_IPI); | |
645 | sigaddset(&set, SIGBUS); | |
646 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
647 | ||
55f8d6ac JK |
648 | return set; |
649 | } | |
650 | ||
296af7c9 BS |
651 | int qemu_init_main_loop(void) |
652 | { | |
653 | int ret; | |
a8486bc9 | 654 | sigset_t blocked_signals; |
296af7c9 | 655 | |
3c638d06 JK |
656 | cpu_set_debug_excp_handler(cpu_debug_handler); |
657 | ||
6d9cb73c JK |
658 | qemu_init_sigbus(); |
659 | ||
a8486bc9 MT |
660 | blocked_signals = block_io_signals(); |
661 | ||
662 | ret = qemu_signalfd_init(blocked_signals); | |
0ab07c62 | 663 | if (ret) { |
a8486bc9 | 664 | return ret; |
0ab07c62 | 665 | } |
a8486bc9 MT |
666 | |
667 | /* Note eventfd must be drained before signalfd handlers run */ | |
296af7c9 | 668 | ret = qemu_event_init(); |
0ab07c62 | 669 | if (ret) { |
296af7c9 | 670 | return ret; |
0ab07c62 | 671 | } |
296af7c9 BS |
672 | |
673 | qemu_cond_init(&qemu_pause_cond); | |
f8ca7b43 | 674 | qemu_cond_init(&qemu_system_cond); |
296af7c9 BS |
675 | qemu_mutex_init(&qemu_fair_mutex); |
676 | qemu_mutex_init(&qemu_global_mutex); | |
677 | qemu_mutex_lock(&qemu_global_mutex); | |
678 | ||
296af7c9 BS |
679 | qemu_thread_self(&io_thread); |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
7277e027 BS |
684 | void qemu_main_loop_start(void) |
685 | { | |
686 | qemu_system_ready = 1; | |
687 | qemu_cond_broadcast(&qemu_system_cond); | |
688 | } | |
689 | ||
e82bcec2 MT |
690 | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
691 | { | |
692 | struct qemu_work_item wi; | |
693 | ||
694 | if (qemu_cpu_self(env)) { | |
695 | func(data); | |
696 | return; | |
697 | } | |
698 | ||
699 | wi.func = func; | |
700 | wi.data = data; | |
0ab07c62 | 701 | if (!env->queued_work_first) { |
e82bcec2 | 702 | env->queued_work_first = &wi; |
0ab07c62 | 703 | } else { |
e82bcec2 | 704 | env->queued_work_last->next = &wi; |
0ab07c62 | 705 | } |
e82bcec2 MT |
706 | env->queued_work_last = &wi; |
707 | wi.next = NULL; | |
708 | wi.done = false; | |
709 | ||
710 | qemu_cpu_kick(env); | |
711 | while (!wi.done) { | |
712 | CPUState *self_env = cpu_single_env; | |
713 | ||
714 | qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); | |
715 | cpu_single_env = self_env; | |
716 | } | |
717 | } | |
718 | ||
719 | static void flush_queued_work(CPUState *env) | |
720 | { | |
721 | struct qemu_work_item *wi; | |
722 | ||
0ab07c62 | 723 | if (!env->queued_work_first) { |
e82bcec2 | 724 | return; |
0ab07c62 | 725 | } |
e82bcec2 MT |
726 | |
727 | while ((wi = env->queued_work_first)) { | |
728 | env->queued_work_first = wi->next; | |
729 | wi->func(wi->data); | |
730 | wi->done = true; | |
731 | } | |
732 | env->queued_work_last = NULL; | |
733 | qemu_cond_broadcast(&qemu_work_cond); | |
734 | } | |
735 | ||
296af7c9 BS |
736 | static void qemu_wait_io_event_common(CPUState *env) |
737 | { | |
738 | if (env->stop) { | |
739 | env->stop = 0; | |
740 | env->stopped = 1; | |
741 | qemu_cond_signal(&qemu_pause_cond); | |
742 | } | |
e82bcec2 | 743 | flush_queued_work(env); |
aa2c364b | 744 | env->thread_kicked = false; |
296af7c9 BS |
745 | } |
746 | ||
6cabe1f3 | 747 | static void qemu_tcg_wait_io_event(void) |
296af7c9 | 748 | { |
6cabe1f3 JK |
749 | CPUState *env; |
750 | ||
16400322 | 751 | while (all_cpu_threads_idle()) { |
6cabe1f3 | 752 | qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000); |
16400322 | 753 | } |
296af7c9 BS |
754 | |
755 | qemu_mutex_unlock(&qemu_global_mutex); | |
756 | ||
757 | /* | |
758 | * Users of qemu_global_mutex can be starved, having no chance | |
759 | * to acquire it since this path will get to it first. | |
760 | * So use another lock to provide fairness. | |
761 | */ | |
762 | qemu_mutex_lock(&qemu_fair_mutex); | |
763 | qemu_mutex_unlock(&qemu_fair_mutex); | |
764 | ||
765 | qemu_mutex_lock(&qemu_global_mutex); | |
6cabe1f3 JK |
766 | |
767 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
768 | qemu_wait_io_event_common(env); | |
769 | } | |
296af7c9 BS |
770 | } |
771 | ||
296af7c9 BS |
772 | static void qemu_kvm_wait_io_event(CPUState *env) |
773 | { | |
16400322 | 774 | while (cpu_thread_is_idle(env)) { |
296af7c9 | 775 | qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000); |
16400322 | 776 | } |
296af7c9 | 777 | |
5db5bdac | 778 | qemu_kvm_eat_signals(env); |
296af7c9 BS |
779 | qemu_wait_io_event_common(env); |
780 | } | |
781 | ||
782 | static int qemu_cpu_exec(CPUState *env); | |
783 | ||
7e97cd88 | 784 | static void *qemu_kvm_cpu_thread_fn(void *arg) |
296af7c9 BS |
785 | { |
786 | CPUState *env = arg; | |
84b4915d | 787 | int r; |
296af7c9 | 788 | |
6164e6d6 | 789 | qemu_mutex_lock(&qemu_global_mutex); |
296af7c9 | 790 | qemu_thread_self(env->thread); |
d31ae052 | 791 | |
84b4915d JK |
792 | r = kvm_init_vcpu(env); |
793 | if (r < 0) { | |
794 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
795 | exit(1); | |
796 | } | |
296af7c9 | 797 | |
55f8d6ac | 798 | qemu_kvm_init_cpu_signals(env); |
296af7c9 BS |
799 | |
800 | /* signal CPU creation */ | |
296af7c9 BS |
801 | env->created = 1; |
802 | qemu_cond_signal(&qemu_cpu_cond); | |
803 | ||
804 | /* and wait for machine initialization */ | |
0ab07c62 | 805 | while (!qemu_system_ready) { |
296af7c9 | 806 | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100); |
0ab07c62 | 807 | } |
296af7c9 BS |
808 | |
809 | while (1) { | |
0ab07c62 | 810 | if (cpu_can_run(env)) { |
296af7c9 | 811 | qemu_cpu_exec(env); |
0ab07c62 | 812 | } |
296af7c9 BS |
813 | qemu_kvm_wait_io_event(env); |
814 | } | |
815 | ||
816 | return NULL; | |
817 | } | |
818 | ||
7e97cd88 | 819 | static void *qemu_tcg_cpu_thread_fn(void *arg) |
296af7c9 BS |
820 | { |
821 | CPUState *env = arg; | |
822 | ||
55f8d6ac | 823 | qemu_tcg_init_cpu_signals(); |
296af7c9 BS |
824 | qemu_thread_self(env->thread); |
825 | ||
826 | /* signal CPU creation */ | |
827 | qemu_mutex_lock(&qemu_global_mutex); | |
0ab07c62 | 828 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
296af7c9 | 829 | env->created = 1; |
0ab07c62 | 830 | } |
296af7c9 BS |
831 | qemu_cond_signal(&qemu_cpu_cond); |
832 | ||
833 | /* and wait for machine initialization */ | |
0ab07c62 | 834 | while (!qemu_system_ready) { |
296af7c9 | 835 | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100); |
0ab07c62 | 836 | } |
296af7c9 BS |
837 | |
838 | while (1) { | |
472fb0c4 | 839 | cpu_exec_all(); |
6cabe1f3 | 840 | qemu_tcg_wait_io_event(); |
296af7c9 BS |
841 | } |
842 | ||
843 | return NULL; | |
844 | } | |
845 | ||
846 | void qemu_cpu_kick(void *_env) | |
847 | { | |
848 | CPUState *env = _env; | |
0ab07c62 | 849 | |
296af7c9 | 850 | qemu_cond_broadcast(env->halt_cond); |
aa2c364b JK |
851 | if (!env->thread_kicked) { |
852 | qemu_thread_signal(env->thread, SIG_IPI); | |
853 | env->thread_kicked = true; | |
854 | } | |
296af7c9 BS |
855 | } |
856 | ||
46d62fac JK |
857 | void qemu_cpu_kick_self(void) |
858 | { | |
859 | assert(cpu_single_env); | |
860 | ||
861 | if (!cpu_single_env->thread_kicked) { | |
862 | qemu_thread_signal(cpu_single_env->thread, SIG_IPI); | |
863 | cpu_single_env->thread_kicked = true; | |
864 | } | |
865 | } | |
866 | ||
296af7c9 BS |
867 | int qemu_cpu_self(void *_env) |
868 | { | |
869 | CPUState *env = _env; | |
870 | QemuThread this; | |
871 | ||
872 | qemu_thread_self(&this); | |
873 | ||
874 | return qemu_thread_equal(&this, env->thread); | |
875 | } | |
876 | ||
296af7c9 BS |
877 | void qemu_mutex_lock_iothread(void) |
878 | { | |
879 | if (kvm_enabled()) { | |
296af7c9 | 880 | qemu_mutex_lock(&qemu_global_mutex); |
1a28cac3 MT |
881 | } else { |
882 | qemu_mutex_lock(&qemu_fair_mutex); | |
883 | if (qemu_mutex_trylock(&qemu_global_mutex)) { | |
884 | qemu_thread_signal(tcg_cpu_thread, SIG_IPI); | |
885 | qemu_mutex_lock(&qemu_global_mutex); | |
886 | } | |
887 | qemu_mutex_unlock(&qemu_fair_mutex); | |
888 | } | |
296af7c9 BS |
889 | } |
890 | ||
891 | void qemu_mutex_unlock_iothread(void) | |
892 | { | |
893 | qemu_mutex_unlock(&qemu_global_mutex); | |
894 | } | |
895 | ||
896 | static int all_vcpus_paused(void) | |
897 | { | |
898 | CPUState *penv = first_cpu; | |
899 | ||
900 | while (penv) { | |
0ab07c62 | 901 | if (!penv->stopped) { |
296af7c9 | 902 | return 0; |
0ab07c62 | 903 | } |
296af7c9 BS |
904 | penv = (CPUState *)penv->next_cpu; |
905 | } | |
906 | ||
907 | return 1; | |
908 | } | |
909 | ||
910 | void pause_all_vcpus(void) | |
911 | { | |
912 | CPUState *penv = first_cpu; | |
913 | ||
914 | while (penv) { | |
915 | penv->stop = 1; | |
296af7c9 BS |
916 | qemu_cpu_kick(penv); |
917 | penv = (CPUState *)penv->next_cpu; | |
918 | } | |
919 | ||
920 | while (!all_vcpus_paused()) { | |
921 | qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100); | |
922 | penv = first_cpu; | |
923 | while (penv) { | |
1fbb22e5 | 924 | qemu_cpu_kick(penv); |
296af7c9 BS |
925 | penv = (CPUState *)penv->next_cpu; |
926 | } | |
927 | } | |
928 | } | |
929 | ||
930 | void resume_all_vcpus(void) | |
931 | { | |
932 | CPUState *penv = first_cpu; | |
933 | ||
934 | while (penv) { | |
935 | penv->stop = 0; | |
936 | penv->stopped = 0; | |
296af7c9 BS |
937 | qemu_cpu_kick(penv); |
938 | penv = (CPUState *)penv->next_cpu; | |
939 | } | |
940 | } | |
941 | ||
7e97cd88 | 942 | static void qemu_tcg_init_vcpu(void *_env) |
296af7c9 BS |
943 | { |
944 | CPUState *env = _env; | |
0ab07c62 | 945 | |
296af7c9 BS |
946 | /* share a single thread for all cpus with TCG */ |
947 | if (!tcg_cpu_thread) { | |
948 | env->thread = qemu_mallocz(sizeof(QemuThread)); | |
949 | env->halt_cond = qemu_mallocz(sizeof(QemuCond)); | |
950 | qemu_cond_init(env->halt_cond); | |
7e97cd88 | 951 | qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env); |
0ab07c62 | 952 | while (env->created == 0) { |
296af7c9 | 953 | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100); |
0ab07c62 | 954 | } |
296af7c9 BS |
955 | tcg_cpu_thread = env->thread; |
956 | tcg_halt_cond = env->halt_cond; | |
957 | } else { | |
958 | env->thread = tcg_cpu_thread; | |
959 | env->halt_cond = tcg_halt_cond; | |
960 | } | |
961 | } | |
962 | ||
7e97cd88 | 963 | static void qemu_kvm_start_vcpu(CPUState *env) |
296af7c9 BS |
964 | { |
965 | env->thread = qemu_mallocz(sizeof(QemuThread)); | |
966 | env->halt_cond = qemu_mallocz(sizeof(QemuCond)); | |
967 | qemu_cond_init(env->halt_cond); | |
7e97cd88 | 968 | qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env); |
0ab07c62 | 969 | while (env->created == 0) { |
296af7c9 | 970 | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100); |
0ab07c62 | 971 | } |
296af7c9 BS |
972 | } |
973 | ||
974 | void qemu_init_vcpu(void *_env) | |
975 | { | |
976 | CPUState *env = _env; | |
977 | ||
978 | env->nr_cores = smp_cores; | |
979 | env->nr_threads = smp_threads; | |
0ab07c62 | 980 | if (kvm_enabled()) { |
7e97cd88 | 981 | qemu_kvm_start_vcpu(env); |
0ab07c62 | 982 | } else { |
7e97cd88 | 983 | qemu_tcg_init_vcpu(env); |
0ab07c62 | 984 | } |
296af7c9 BS |
985 | } |
986 | ||
987 | void qemu_notify_event(void) | |
988 | { | |
989 | qemu_event_increment(); | |
990 | } | |
991 | ||
b4a3d965 JK |
992 | void cpu_stop_current(void) |
993 | { | |
994 | if (cpu_single_env) { | |
995 | cpu_single_env->stopped = 1; | |
996 | cpu_exit(cpu_single_env); | |
997 | } | |
998 | } | |
999 | ||
296af7c9 BS |
1000 | void vm_stop(int reason) |
1001 | { | |
1002 | QemuThread me; | |
1003 | qemu_thread_self(&me); | |
1004 | ||
1005 | if (!qemu_thread_equal(&me, &io_thread)) { | |
1006 | qemu_system_vmstop_request(reason); | |
1007 | /* | |
1008 | * FIXME: should not return to device code in case | |
1009 | * vm_stop() has been requested. | |
1010 | */ | |
b4a3d965 | 1011 | cpu_stop_current(); |
296af7c9 BS |
1012 | return; |
1013 | } | |
1014 | do_vm_stop(reason); | |
1015 | } | |
1016 | ||
1017 | #endif | |
1018 | ||
1019 | static int qemu_cpu_exec(CPUState *env) | |
1020 | { | |
1021 | int ret; | |
1022 | #ifdef CONFIG_PROFILER | |
1023 | int64_t ti; | |
1024 | #endif | |
1025 | ||
1026 | #ifdef CONFIG_PROFILER | |
1027 | ti = profile_getclock(); | |
1028 | #endif | |
1029 | if (use_icount) { | |
1030 | int64_t count; | |
1031 | int decr; | |
1032 | qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1033 | env->icount_decr.u16.low = 0; | |
1034 | env->icount_extra = 0; | |
1035 | count = qemu_icount_round (qemu_next_deadline()); | |
1036 | qemu_icount += count; | |
1037 | decr = (count > 0xffff) ? 0xffff : count; | |
1038 | count -= decr; | |
1039 | env->icount_decr.u16.low = decr; | |
1040 | env->icount_extra = count; | |
1041 | } | |
1042 | ret = cpu_exec(env); | |
1043 | #ifdef CONFIG_PROFILER | |
1044 | qemu_time += profile_getclock() - ti; | |
1045 | #endif | |
1046 | if (use_icount) { | |
1047 | /* Fold pending instructions back into the | |
1048 | instruction counter, and clear the interrupt flag. */ | |
1049 | qemu_icount -= (env->icount_decr.u16.low | |
1050 | + env->icount_extra); | |
1051 | env->icount_decr.u32 = 0; | |
1052 | env->icount_extra = 0; | |
1053 | } | |
1054 | return ret; | |
1055 | } | |
1056 | ||
472fb0c4 | 1057 | bool cpu_exec_all(void) |
296af7c9 | 1058 | { |
9a36085b JK |
1059 | int r; |
1060 | ||
0ab07c62 | 1061 | if (next_cpu == NULL) { |
296af7c9 | 1062 | next_cpu = first_cpu; |
0ab07c62 | 1063 | } |
c629a4bc | 1064 | for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
345f4426 | 1065 | CPUState *env = next_cpu; |
296af7c9 BS |
1066 | |
1067 | qemu_clock_enable(vm_clock, | |
345f4426 | 1068 | (env->singlestep_enabled & SSTEP_NOTIMER) == 0); |
296af7c9 | 1069 | |
0ab07c62 | 1070 | if (qemu_alarm_pending()) { |
296af7c9 | 1071 | break; |
0ab07c62 | 1072 | } |
3c638d06 | 1073 | if (cpu_can_run(env)) { |
9a36085b JK |
1074 | r = qemu_cpu_exec(env); |
1075 | if (kvm_enabled()) { | |
1076 | qemu_kvm_eat_signals(env); | |
1077 | } | |
1078 | if (r == EXCP_DEBUG) { | |
3c638d06 JK |
1079 | break; |
1080 | } | |
1081 | } else if (env->stop) { | |
296af7c9 BS |
1082 | break; |
1083 | } | |
1084 | } | |
c629a4bc | 1085 | exit_request = 0; |
16400322 | 1086 | return !all_cpu_threads_idle(); |
296af7c9 BS |
1087 | } |
1088 | ||
1089 | void set_numa_modes(void) | |
1090 | { | |
1091 | CPUState *env; | |
1092 | int i; | |
1093 | ||
1094 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1095 | for (i = 0; i < nb_numa_nodes; i++) { | |
1096 | if (node_cpumask[i] & (1 << env->cpu_index)) { | |
1097 | env->numa_node = i; | |
1098 | } | |
1099 | } | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | void set_cpu_log(const char *optarg) | |
1104 | { | |
1105 | int mask; | |
1106 | const CPULogItem *item; | |
1107 | ||
1108 | mask = cpu_str_to_log_mask(optarg); | |
1109 | if (!mask) { | |
1110 | printf("Log items (comma separated):\n"); | |
1111 | for (item = cpu_log_items; item->mask != 0; item++) { | |
1112 | printf("%-10s %s\n", item->name, item->help); | |
1113 | } | |
1114 | exit(1); | |
1115 | } | |
1116 | cpu_set_log(mask); | |
1117 | } | |
29e922b6 BS |
1118 | |
1119 | /* Return the virtual CPU time, based on the instruction counter. */ | |
1120 | int64_t cpu_get_icount(void) | |
1121 | { | |
1122 | int64_t icount; | |
1123 | CPUState *env = cpu_single_env;; | |
1124 | ||
1125 | icount = qemu_icount; | |
1126 | if (env) { | |
1127 | if (!can_do_io(env)) { | |
1128 | fprintf(stderr, "Bad clock read\n"); | |
1129 | } | |
1130 | icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1131 | } | |
1132 | return qemu_icount_bias + (icount << icount_time_shift); | |
1133 | } | |
262353cb | 1134 | |
9a78eead | 1135 | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
262353cb BS |
1136 | { |
1137 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
1138 | #if defined(cpu_list_id) | |
1139 | cpu_list_id(f, cpu_fprintf, optarg); | |
1140 | #elif defined(cpu_list) | |
1141 | cpu_list(f, cpu_fprintf); /* deprecated */ | |
1142 | #endif | |
1143 | } |