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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); | |
e07bbac5 JK |
171 | debug_requested = VMSTOP_DEBUG; |
172 | vm_stop(VMSTOP_DEBUG); | |
3c638d06 JK |
173 | } |
174 | ||
6d9cb73c JK |
175 | #ifdef CONFIG_LINUX |
176 | static void sigbus_reraise(void) | |
177 | { | |
178 | sigset_t set; | |
179 | struct sigaction action; | |
180 | ||
181 | memset(&action, 0, sizeof(action)); | |
182 | action.sa_handler = SIG_DFL; | |
183 | if (!sigaction(SIGBUS, &action, NULL)) { | |
184 | raise(SIGBUS); | |
185 | sigemptyset(&set); | |
186 | sigaddset(&set, SIGBUS); | |
187 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
188 | } | |
189 | perror("Failed to re-raise SIGBUS!\n"); | |
190 | abort(); | |
191 | } | |
192 | ||
193 | static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, | |
194 | void *ctx) | |
195 | { | |
196 | if (kvm_on_sigbus(siginfo->ssi_code, | |
197 | (void *)(intptr_t)siginfo->ssi_addr)) { | |
198 | sigbus_reraise(); | |
199 | } | |
200 | } | |
201 | ||
202 | static void qemu_init_sigbus(void) | |
203 | { | |
204 | struct sigaction action; | |
205 | ||
206 | memset(&action, 0, sizeof(action)); | |
207 | action.sa_flags = SA_SIGINFO; | |
208 | action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; | |
209 | sigaction(SIGBUS, &action, NULL); | |
210 | ||
211 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
212 | } | |
213 | ||
214 | #else /* !CONFIG_LINUX */ | |
215 | ||
216 | static void qemu_init_sigbus(void) | |
217 | { | |
218 | } | |
219 | #endif /* !CONFIG_LINUX */ | |
220 | ||
296af7c9 BS |
221 | #ifndef _WIN32 |
222 | static int io_thread_fd = -1; | |
223 | ||
224 | static void qemu_event_increment(void) | |
225 | { | |
226 | /* Write 8 bytes to be compatible with eventfd. */ | |
26a82330 | 227 | static const uint64_t val = 1; |
296af7c9 BS |
228 | ssize_t ret; |
229 | ||
0ab07c62 | 230 | if (io_thread_fd == -1) { |
296af7c9 | 231 | return; |
0ab07c62 | 232 | } |
296af7c9 BS |
233 | do { |
234 | ret = write(io_thread_fd, &val, sizeof(val)); | |
235 | } while (ret < 0 && errno == EINTR); | |
236 | ||
237 | /* EAGAIN is fine, a read must be pending. */ | |
238 | if (ret < 0 && errno != EAGAIN) { | |
239 | fprintf(stderr, "qemu_event_increment: write() filed: %s\n", | |
240 | strerror(errno)); | |
241 | exit (1); | |
242 | } | |
243 | } | |
244 | ||
245 | static void qemu_event_read(void *opaque) | |
246 | { | |
247 | int fd = (unsigned long)opaque; | |
248 | ssize_t len; | |
249 | char buffer[512]; | |
250 | ||
251 | /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */ | |
252 | do { | |
253 | len = read(fd, buffer, sizeof(buffer)); | |
254 | } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); | |
255 | } | |
256 | ||
257 | static int qemu_event_init(void) | |
258 | { | |
259 | int err; | |
260 | int fds[2]; | |
261 | ||
262 | err = qemu_eventfd(fds); | |
0ab07c62 | 263 | if (err == -1) { |
296af7c9 | 264 | return -errno; |
0ab07c62 | 265 | } |
296af7c9 | 266 | err = fcntl_setfl(fds[0], O_NONBLOCK); |
0ab07c62 | 267 | if (err < 0) { |
296af7c9 | 268 | goto fail; |
0ab07c62 | 269 | } |
296af7c9 | 270 | err = fcntl_setfl(fds[1], O_NONBLOCK); |
0ab07c62 | 271 | if (err < 0) { |
296af7c9 | 272 | goto fail; |
0ab07c62 | 273 | } |
296af7c9 BS |
274 | qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL, |
275 | (void *)(unsigned long)fds[0]); | |
276 | ||
277 | io_thread_fd = fds[1]; | |
278 | return 0; | |
279 | ||
280 | fail: | |
281 | close(fds[0]); | |
282 | close(fds[1]); | |
283 | return err; | |
284 | } | |
55f8d6ac | 285 | |
55f8d6ac JK |
286 | static void dummy_signal(int sig) |
287 | { | |
288 | } | |
55f8d6ac | 289 | |
d0f294ce JK |
290 | /* If we have signalfd, we mask out the signals we want to handle and then |
291 | * use signalfd to listen for them. We rely on whatever the current signal | |
292 | * handler is to dispatch the signals when we receive them. | |
293 | */ | |
294 | static void sigfd_handler(void *opaque) | |
295 | { | |
296 | int fd = (unsigned long) opaque; | |
297 | struct qemu_signalfd_siginfo info; | |
298 | struct sigaction action; | |
299 | ssize_t len; | |
300 | ||
301 | while (1) { | |
302 | do { | |
303 | len = read(fd, &info, sizeof(info)); | |
304 | } while (len == -1 && errno == EINTR); | |
305 | ||
306 | if (len == -1 && errno == EAGAIN) { | |
307 | break; | |
308 | } | |
309 | ||
310 | if (len != sizeof(info)) { | |
311 | printf("read from sigfd returned %zd: %m\n", len); | |
312 | return; | |
313 | } | |
314 | ||
315 | sigaction(info.ssi_signo, NULL, &action); | |
316 | if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) { | |
317 | action.sa_sigaction(info.ssi_signo, | |
318 | (siginfo_t *)&info, NULL); | |
319 | } else if (action.sa_handler) { | |
320 | action.sa_handler(info.ssi_signo); | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | static int qemu_signalfd_init(sigset_t mask) | |
326 | { | |
327 | int sigfd; | |
328 | ||
329 | sigfd = qemu_signalfd(&mask); | |
330 | if (sigfd == -1) { | |
331 | fprintf(stderr, "failed to create signalfd\n"); | |
332 | return -errno; | |
333 | } | |
334 | ||
335 | fcntl_setfl(sigfd, O_NONBLOCK); | |
336 | ||
337 | qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL, | |
338 | (void *)(unsigned long) sigfd); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
9a36085b JK |
343 | static void qemu_kvm_eat_signals(CPUState *env) |
344 | { | |
345 | struct timespec ts = { 0, 0 }; | |
346 | siginfo_t siginfo; | |
347 | sigset_t waitset; | |
348 | sigset_t chkset; | |
349 | int r; | |
350 | ||
351 | sigemptyset(&waitset); | |
352 | sigaddset(&waitset, SIG_IPI); | |
353 | sigaddset(&waitset, SIGBUS); | |
354 | ||
355 | do { | |
356 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
357 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
358 | perror("sigtimedwait"); | |
359 | exit(1); | |
360 | } | |
361 | ||
362 | switch (r) { | |
9a36085b JK |
363 | case SIGBUS: |
364 | if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) { | |
365 | sigbus_reraise(); | |
366 | } | |
367 | break; | |
9a36085b JK |
368 | default: |
369 | break; | |
370 | } | |
371 | ||
372 | r = sigpending(&chkset); | |
373 | if (r == -1) { | |
374 | perror("sigpending"); | |
375 | exit(1); | |
376 | } | |
377 | } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS)); | |
de758970 JK |
378 | |
379 | #ifndef CONFIG_IOTHREAD | |
380 | if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) { | |
381 | qemu_notify_event(); | |
382 | } | |
383 | #endif | |
9a36085b JK |
384 | } |
385 | ||
55f8d6ac JK |
386 | #else /* _WIN32 */ |
387 | ||
296af7c9 BS |
388 | HANDLE qemu_event_handle; |
389 | ||
390 | static void dummy_event_handler(void *opaque) | |
391 | { | |
392 | } | |
393 | ||
394 | static int qemu_event_init(void) | |
395 | { | |
396 | qemu_event_handle = CreateEvent(NULL, FALSE, FALSE, NULL); | |
397 | if (!qemu_event_handle) { | |
398 | fprintf(stderr, "Failed CreateEvent: %ld\n", GetLastError()); | |
399 | return -1; | |
400 | } | |
401 | qemu_add_wait_object(qemu_event_handle, dummy_event_handler, NULL); | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static void qemu_event_increment(void) | |
406 | { | |
407 | if (!SetEvent(qemu_event_handle)) { | |
408 | fprintf(stderr, "qemu_event_increment: SetEvent failed: %ld\n", | |
409 | GetLastError()); | |
410 | exit (1); | |
411 | } | |
412 | } | |
9a36085b JK |
413 | |
414 | static void qemu_kvm_eat_signals(CPUState *env) | |
415 | { | |
416 | } | |
55f8d6ac | 417 | #endif /* _WIN32 */ |
296af7c9 BS |
418 | |
419 | #ifndef CONFIG_IOTHREAD | |
ff48eb5f JK |
420 | static void qemu_kvm_init_cpu_signals(CPUState *env) |
421 | { | |
422 | #ifndef _WIN32 | |
423 | int r; | |
424 | sigset_t set; | |
425 | struct sigaction sigact; | |
426 | ||
427 | memset(&sigact, 0, sizeof(sigact)); | |
428 | sigact.sa_handler = dummy_signal; | |
429 | sigaction(SIG_IPI, &sigact, NULL); | |
430 | ||
431 | sigemptyset(&set); | |
432 | sigaddset(&set, SIG_IPI); | |
de758970 JK |
433 | sigaddset(&set, SIGIO); |
434 | sigaddset(&set, SIGALRM); | |
ff48eb5f JK |
435 | pthread_sigmask(SIG_BLOCK, &set, NULL); |
436 | ||
437 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
438 | sigdelset(&set, SIG_IPI); | |
439 | sigdelset(&set, SIGBUS); | |
de758970 JK |
440 | sigdelset(&set, SIGIO); |
441 | sigdelset(&set, SIGALRM); | |
ff48eb5f JK |
442 | r = kvm_set_signal_mask(env, &set); |
443 | if (r) { | |
444 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
445 | exit(1); | |
446 | } | |
447 | #endif | |
448 | } | |
449 | ||
de758970 JK |
450 | #ifndef _WIN32 |
451 | static sigset_t block_synchronous_signals(void) | |
452 | { | |
453 | sigset_t set; | |
454 | ||
455 | sigemptyset(&set); | |
6d9cb73c | 456 | sigaddset(&set, SIGBUS); |
de758970 JK |
457 | if (kvm_enabled()) { |
458 | /* | |
459 | * We need to process timer signals synchronously to avoid a race | |
460 | * between exit_request check and KVM vcpu entry. | |
461 | */ | |
462 | sigaddset(&set, SIGIO); | |
463 | sigaddset(&set, SIGALRM); | |
464 | } | |
465 | ||
466 | return set; | |
467 | } | |
468 | #endif | |
469 | ||
296af7c9 BS |
470 | int qemu_init_main_loop(void) |
471 | { | |
d0f294ce JK |
472 | #ifndef _WIN32 |
473 | sigset_t blocked_signals; | |
474 | int ret; | |
475 | ||
de758970 | 476 | blocked_signals = block_synchronous_signals(); |
d0f294ce JK |
477 | |
478 | ret = qemu_signalfd_init(blocked_signals); | |
479 | if (ret) { | |
480 | return ret; | |
481 | } | |
482 | #endif | |
3c638d06 JK |
483 | cpu_set_debug_excp_handler(cpu_debug_handler); |
484 | ||
6d9cb73c JK |
485 | qemu_init_sigbus(); |
486 | ||
296af7c9 BS |
487 | return qemu_event_init(); |
488 | } | |
489 | ||
7277e027 BS |
490 | void qemu_main_loop_start(void) |
491 | { | |
492 | } | |
493 | ||
296af7c9 BS |
494 | void qemu_init_vcpu(void *_env) |
495 | { | |
496 | CPUState *env = _env; | |
84b4915d | 497 | int r; |
296af7c9 BS |
498 | |
499 | env->nr_cores = smp_cores; | |
500 | env->nr_threads = smp_threads; | |
84b4915d JK |
501 | |
502 | if (kvm_enabled()) { | |
503 | r = kvm_init_vcpu(env); | |
504 | if (r < 0) { | |
505 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
506 | exit(1); | |
507 | } | |
ff48eb5f | 508 | qemu_kvm_init_cpu_signals(env); |
84b4915d | 509 | } |
296af7c9 BS |
510 | } |
511 | ||
512 | int qemu_cpu_self(void *env) | |
513 | { | |
514 | return 1; | |
515 | } | |
516 | ||
e82bcec2 MT |
517 | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
518 | { | |
519 | func(data); | |
520 | } | |
521 | ||
296af7c9 BS |
522 | void resume_all_vcpus(void) |
523 | { | |
524 | } | |
525 | ||
526 | void pause_all_vcpus(void) | |
527 | { | |
528 | } | |
529 | ||
530 | void qemu_cpu_kick(void *env) | |
531 | { | |
296af7c9 BS |
532 | } |
533 | ||
46d62fac JK |
534 | void qemu_cpu_kick_self(void) |
535 | { | |
536 | #ifndef _WIN32 | |
537 | assert(cpu_single_env); | |
538 | ||
539 | raise(SIG_IPI); | |
540 | #else | |
541 | abort(); | |
542 | #endif | |
543 | } | |
544 | ||
296af7c9 BS |
545 | void qemu_notify_event(void) |
546 | { | |
547 | CPUState *env = cpu_single_env; | |
548 | ||
549 | qemu_event_increment (); | |
550 | if (env) { | |
551 | cpu_exit(env); | |
552 | } | |
553 | if (next_cpu && env != next_cpu) { | |
554 | cpu_exit(next_cpu); | |
555 | } | |
38145df2 | 556 | exit_request = 1; |
296af7c9 BS |
557 | } |
558 | ||
559 | void qemu_mutex_lock_iothread(void) {} | |
560 | void qemu_mutex_unlock_iothread(void) {} | |
561 | ||
b4a3d965 JK |
562 | void cpu_stop_current(void) |
563 | { | |
564 | } | |
565 | ||
296af7c9 BS |
566 | void vm_stop(int reason) |
567 | { | |
568 | do_vm_stop(reason); | |
569 | } | |
570 | ||
571 | #else /* CONFIG_IOTHREAD */ | |
572 | ||
573 | #include "qemu-thread.h" | |
574 | ||
575 | QemuMutex qemu_global_mutex; | |
576 | static QemuMutex qemu_fair_mutex; | |
577 | ||
578 | static QemuThread io_thread; | |
579 | ||
580 | static QemuThread *tcg_cpu_thread; | |
581 | static QemuCond *tcg_halt_cond; | |
582 | ||
583 | static int qemu_system_ready; | |
584 | /* cpu creation */ | |
585 | static QemuCond qemu_cpu_cond; | |
586 | /* system init */ | |
587 | static QemuCond qemu_system_cond; | |
588 | static QemuCond qemu_pause_cond; | |
e82bcec2 | 589 | static QemuCond qemu_work_cond; |
296af7c9 | 590 | |
55f8d6ac JK |
591 | static void cpu_signal(int sig) |
592 | { | |
593 | if (cpu_single_env) { | |
594 | cpu_exit(cpu_single_env); | |
595 | } | |
596 | exit_request = 1; | |
597 | } | |
598 | ||
599 | static void qemu_kvm_init_cpu_signals(CPUState *env) | |
600 | { | |
601 | int r; | |
602 | sigset_t set; | |
603 | struct sigaction sigact; | |
604 | ||
605 | memset(&sigact, 0, sizeof(sigact)); | |
606 | sigact.sa_handler = dummy_signal; | |
607 | sigaction(SIG_IPI, &sigact, NULL); | |
608 | ||
609 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
610 | sigdelset(&set, SIG_IPI); | |
611 | sigdelset(&set, SIGBUS); | |
612 | r = kvm_set_signal_mask(env, &set); | |
613 | if (r) { | |
614 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
615 | exit(1); | |
616 | } | |
617 | } | |
618 | ||
619 | static void qemu_tcg_init_cpu_signals(void) | |
620 | { | |
621 | sigset_t set; | |
622 | struct sigaction sigact; | |
623 | ||
624 | memset(&sigact, 0, sizeof(sigact)); | |
625 | sigact.sa_handler = cpu_signal; | |
626 | sigaction(SIG_IPI, &sigact, NULL); | |
627 | ||
628 | sigemptyset(&set); | |
629 | sigaddset(&set, SIG_IPI); | |
630 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
631 | } | |
632 | ||
55f8d6ac JK |
633 | static sigset_t block_io_signals(void) |
634 | { | |
635 | sigset_t set; | |
55f8d6ac JK |
636 | |
637 | /* SIGUSR2 used by posix-aio-compat.c */ | |
638 | sigemptyset(&set); | |
639 | sigaddset(&set, SIGUSR2); | |
640 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
641 | ||
642 | sigemptyset(&set); | |
643 | sigaddset(&set, SIGIO); | |
644 | sigaddset(&set, SIGALRM); | |
645 | sigaddset(&set, SIG_IPI); | |
646 | sigaddset(&set, SIGBUS); | |
647 | pthread_sigmask(SIG_BLOCK, &set, NULL); | |
648 | ||
55f8d6ac JK |
649 | return set; |
650 | } | |
651 | ||
296af7c9 BS |
652 | int qemu_init_main_loop(void) |
653 | { | |
654 | int ret; | |
a8486bc9 | 655 | sigset_t blocked_signals; |
296af7c9 | 656 | |
3c638d06 JK |
657 | cpu_set_debug_excp_handler(cpu_debug_handler); |
658 | ||
6d9cb73c JK |
659 | qemu_init_sigbus(); |
660 | ||
a8486bc9 MT |
661 | blocked_signals = block_io_signals(); |
662 | ||
663 | ret = qemu_signalfd_init(blocked_signals); | |
0ab07c62 | 664 | if (ret) { |
a8486bc9 | 665 | return ret; |
0ab07c62 | 666 | } |
a8486bc9 MT |
667 | |
668 | /* Note eventfd must be drained before signalfd handlers run */ | |
296af7c9 | 669 | ret = qemu_event_init(); |
0ab07c62 | 670 | if (ret) { |
296af7c9 | 671 | return ret; |
0ab07c62 | 672 | } |
296af7c9 BS |
673 | |
674 | qemu_cond_init(&qemu_pause_cond); | |
f8ca7b43 | 675 | qemu_cond_init(&qemu_system_cond); |
296af7c9 BS |
676 | qemu_mutex_init(&qemu_fair_mutex); |
677 | qemu_mutex_init(&qemu_global_mutex); | |
678 | qemu_mutex_lock(&qemu_global_mutex); | |
679 | ||
296af7c9 BS |
680 | qemu_thread_self(&io_thread); |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
7277e027 BS |
685 | void qemu_main_loop_start(void) |
686 | { | |
687 | qemu_system_ready = 1; | |
688 | qemu_cond_broadcast(&qemu_system_cond); | |
689 | } | |
690 | ||
e82bcec2 MT |
691 | void run_on_cpu(CPUState *env, void (*func)(void *data), void *data) |
692 | { | |
693 | struct qemu_work_item wi; | |
694 | ||
695 | if (qemu_cpu_self(env)) { | |
696 | func(data); | |
697 | return; | |
698 | } | |
699 | ||
700 | wi.func = func; | |
701 | wi.data = data; | |
0ab07c62 | 702 | if (!env->queued_work_first) { |
e82bcec2 | 703 | env->queued_work_first = &wi; |
0ab07c62 | 704 | } else { |
e82bcec2 | 705 | env->queued_work_last->next = &wi; |
0ab07c62 | 706 | } |
e82bcec2 MT |
707 | env->queued_work_last = &wi; |
708 | wi.next = NULL; | |
709 | wi.done = false; | |
710 | ||
711 | qemu_cpu_kick(env); | |
712 | while (!wi.done) { | |
713 | CPUState *self_env = cpu_single_env; | |
714 | ||
715 | qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); | |
716 | cpu_single_env = self_env; | |
717 | } | |
718 | } | |
719 | ||
720 | static void flush_queued_work(CPUState *env) | |
721 | { | |
722 | struct qemu_work_item *wi; | |
723 | ||
0ab07c62 | 724 | if (!env->queued_work_first) { |
e82bcec2 | 725 | return; |
0ab07c62 | 726 | } |
e82bcec2 MT |
727 | |
728 | while ((wi = env->queued_work_first)) { | |
729 | env->queued_work_first = wi->next; | |
730 | wi->func(wi->data); | |
731 | wi->done = true; | |
732 | } | |
733 | env->queued_work_last = NULL; | |
734 | qemu_cond_broadcast(&qemu_work_cond); | |
735 | } | |
736 | ||
296af7c9 BS |
737 | static void qemu_wait_io_event_common(CPUState *env) |
738 | { | |
739 | if (env->stop) { | |
740 | env->stop = 0; | |
741 | env->stopped = 1; | |
742 | qemu_cond_signal(&qemu_pause_cond); | |
743 | } | |
e82bcec2 | 744 | flush_queued_work(env); |
aa2c364b | 745 | env->thread_kicked = false; |
296af7c9 BS |
746 | } |
747 | ||
6cabe1f3 | 748 | static void qemu_tcg_wait_io_event(void) |
296af7c9 | 749 | { |
6cabe1f3 JK |
750 | CPUState *env; |
751 | ||
16400322 | 752 | while (all_cpu_threads_idle()) { |
6cabe1f3 | 753 | qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000); |
16400322 | 754 | } |
296af7c9 BS |
755 | |
756 | qemu_mutex_unlock(&qemu_global_mutex); | |
757 | ||
758 | /* | |
759 | * Users of qemu_global_mutex can be starved, having no chance | |
760 | * to acquire it since this path will get to it first. | |
761 | * So use another lock to provide fairness. | |
762 | */ | |
763 | qemu_mutex_lock(&qemu_fair_mutex); | |
764 | qemu_mutex_unlock(&qemu_fair_mutex); | |
765 | ||
766 | qemu_mutex_lock(&qemu_global_mutex); | |
6cabe1f3 JK |
767 | |
768 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
769 | qemu_wait_io_event_common(env); | |
770 | } | |
296af7c9 BS |
771 | } |
772 | ||
296af7c9 BS |
773 | static void qemu_kvm_wait_io_event(CPUState *env) |
774 | { | |
16400322 | 775 | while (cpu_thread_is_idle(env)) { |
296af7c9 | 776 | qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000); |
16400322 | 777 | } |
296af7c9 | 778 | |
5db5bdac | 779 | qemu_kvm_eat_signals(env); |
296af7c9 BS |
780 | qemu_wait_io_event_common(env); |
781 | } | |
782 | ||
783 | static int qemu_cpu_exec(CPUState *env); | |
784 | ||
7e97cd88 | 785 | static void *qemu_kvm_cpu_thread_fn(void *arg) |
296af7c9 BS |
786 | { |
787 | CPUState *env = arg; | |
84b4915d | 788 | int r; |
296af7c9 | 789 | |
6164e6d6 | 790 | qemu_mutex_lock(&qemu_global_mutex); |
296af7c9 | 791 | qemu_thread_self(env->thread); |
d31ae052 | 792 | |
84b4915d JK |
793 | r = kvm_init_vcpu(env); |
794 | if (r < 0) { | |
795 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
796 | exit(1); | |
797 | } | |
296af7c9 | 798 | |
55f8d6ac | 799 | qemu_kvm_init_cpu_signals(env); |
296af7c9 BS |
800 | |
801 | /* signal CPU creation */ | |
296af7c9 BS |
802 | env->created = 1; |
803 | qemu_cond_signal(&qemu_cpu_cond); | |
804 | ||
805 | /* and wait for machine initialization */ | |
0ab07c62 | 806 | while (!qemu_system_ready) { |
296af7c9 | 807 | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100); |
0ab07c62 | 808 | } |
296af7c9 BS |
809 | |
810 | while (1) { | |
0ab07c62 | 811 | if (cpu_can_run(env)) { |
296af7c9 | 812 | qemu_cpu_exec(env); |
0ab07c62 | 813 | } |
296af7c9 BS |
814 | qemu_kvm_wait_io_event(env); |
815 | } | |
816 | ||
817 | return NULL; | |
818 | } | |
819 | ||
7e97cd88 | 820 | static void *qemu_tcg_cpu_thread_fn(void *arg) |
296af7c9 BS |
821 | { |
822 | CPUState *env = arg; | |
823 | ||
55f8d6ac | 824 | qemu_tcg_init_cpu_signals(); |
296af7c9 BS |
825 | qemu_thread_self(env->thread); |
826 | ||
827 | /* signal CPU creation */ | |
828 | qemu_mutex_lock(&qemu_global_mutex); | |
0ab07c62 | 829 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
296af7c9 | 830 | env->created = 1; |
0ab07c62 | 831 | } |
296af7c9 BS |
832 | qemu_cond_signal(&qemu_cpu_cond); |
833 | ||
834 | /* and wait for machine initialization */ | |
0ab07c62 | 835 | while (!qemu_system_ready) { |
296af7c9 | 836 | qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100); |
0ab07c62 | 837 | } |
296af7c9 BS |
838 | |
839 | while (1) { | |
472fb0c4 | 840 | cpu_exec_all(); |
6cabe1f3 | 841 | qemu_tcg_wait_io_event(); |
296af7c9 BS |
842 | } |
843 | ||
844 | return NULL; | |
845 | } | |
846 | ||
847 | void qemu_cpu_kick(void *_env) | |
848 | { | |
849 | CPUState *env = _env; | |
0ab07c62 | 850 | |
296af7c9 | 851 | qemu_cond_broadcast(env->halt_cond); |
aa2c364b JK |
852 | if (!env->thread_kicked) { |
853 | qemu_thread_signal(env->thread, SIG_IPI); | |
854 | env->thread_kicked = true; | |
855 | } | |
296af7c9 BS |
856 | } |
857 | ||
46d62fac JK |
858 | void qemu_cpu_kick_self(void) |
859 | { | |
860 | assert(cpu_single_env); | |
861 | ||
862 | if (!cpu_single_env->thread_kicked) { | |
863 | qemu_thread_signal(cpu_single_env->thread, SIG_IPI); | |
864 | cpu_single_env->thread_kicked = true; | |
865 | } | |
866 | } | |
867 | ||
296af7c9 BS |
868 | int qemu_cpu_self(void *_env) |
869 | { | |
870 | CPUState *env = _env; | |
871 | QemuThread this; | |
872 | ||
873 | qemu_thread_self(&this); | |
874 | ||
875 | return qemu_thread_equal(&this, env->thread); | |
876 | } | |
877 | ||
296af7c9 BS |
878 | void qemu_mutex_lock_iothread(void) |
879 | { | |
880 | if (kvm_enabled()) { | |
296af7c9 | 881 | qemu_mutex_lock(&qemu_global_mutex); |
1a28cac3 MT |
882 | } else { |
883 | qemu_mutex_lock(&qemu_fair_mutex); | |
884 | if (qemu_mutex_trylock(&qemu_global_mutex)) { | |
885 | qemu_thread_signal(tcg_cpu_thread, SIG_IPI); | |
886 | qemu_mutex_lock(&qemu_global_mutex); | |
887 | } | |
888 | qemu_mutex_unlock(&qemu_fair_mutex); | |
889 | } | |
296af7c9 BS |
890 | } |
891 | ||
892 | void qemu_mutex_unlock_iothread(void) | |
893 | { | |
894 | qemu_mutex_unlock(&qemu_global_mutex); | |
895 | } | |
896 | ||
897 | static int all_vcpus_paused(void) | |
898 | { | |
899 | CPUState *penv = first_cpu; | |
900 | ||
901 | while (penv) { | |
0ab07c62 | 902 | if (!penv->stopped) { |
296af7c9 | 903 | return 0; |
0ab07c62 | 904 | } |
296af7c9 BS |
905 | penv = (CPUState *)penv->next_cpu; |
906 | } | |
907 | ||
908 | return 1; | |
909 | } | |
910 | ||
911 | void pause_all_vcpus(void) | |
912 | { | |
913 | CPUState *penv = first_cpu; | |
914 | ||
915 | while (penv) { | |
916 | penv->stop = 1; | |
296af7c9 BS |
917 | qemu_cpu_kick(penv); |
918 | penv = (CPUState *)penv->next_cpu; | |
919 | } | |
920 | ||
921 | while (!all_vcpus_paused()) { | |
922 | qemu_cond_timedwait(&qemu_pause_cond, &qemu_global_mutex, 100); | |
923 | penv = first_cpu; | |
924 | while (penv) { | |
1fbb22e5 | 925 | qemu_cpu_kick(penv); |
296af7c9 BS |
926 | penv = (CPUState *)penv->next_cpu; |
927 | } | |
928 | } | |
929 | } | |
930 | ||
931 | void resume_all_vcpus(void) | |
932 | { | |
933 | CPUState *penv = first_cpu; | |
934 | ||
935 | while (penv) { | |
936 | penv->stop = 0; | |
937 | penv->stopped = 0; | |
296af7c9 BS |
938 | qemu_cpu_kick(penv); |
939 | penv = (CPUState *)penv->next_cpu; | |
940 | } | |
941 | } | |
942 | ||
7e97cd88 | 943 | static void qemu_tcg_init_vcpu(void *_env) |
296af7c9 BS |
944 | { |
945 | CPUState *env = _env; | |
0ab07c62 | 946 | |
296af7c9 BS |
947 | /* share a single thread for all cpus with TCG */ |
948 | if (!tcg_cpu_thread) { | |
949 | env->thread = qemu_mallocz(sizeof(QemuThread)); | |
950 | env->halt_cond = qemu_mallocz(sizeof(QemuCond)); | |
951 | qemu_cond_init(env->halt_cond); | |
7e97cd88 | 952 | qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env); |
0ab07c62 | 953 | while (env->created == 0) { |
296af7c9 | 954 | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100); |
0ab07c62 | 955 | } |
296af7c9 BS |
956 | tcg_cpu_thread = env->thread; |
957 | tcg_halt_cond = env->halt_cond; | |
958 | } else { | |
959 | env->thread = tcg_cpu_thread; | |
960 | env->halt_cond = tcg_halt_cond; | |
961 | } | |
962 | } | |
963 | ||
7e97cd88 | 964 | static void qemu_kvm_start_vcpu(CPUState *env) |
296af7c9 BS |
965 | { |
966 | env->thread = qemu_mallocz(sizeof(QemuThread)); | |
967 | env->halt_cond = qemu_mallocz(sizeof(QemuCond)); | |
968 | qemu_cond_init(env->halt_cond); | |
7e97cd88 | 969 | qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env); |
0ab07c62 | 970 | while (env->created == 0) { |
296af7c9 | 971 | qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100); |
0ab07c62 | 972 | } |
296af7c9 BS |
973 | } |
974 | ||
975 | void qemu_init_vcpu(void *_env) | |
976 | { | |
977 | CPUState *env = _env; | |
978 | ||
979 | env->nr_cores = smp_cores; | |
980 | env->nr_threads = smp_threads; | |
0ab07c62 | 981 | if (kvm_enabled()) { |
7e97cd88 | 982 | qemu_kvm_start_vcpu(env); |
0ab07c62 | 983 | } else { |
7e97cd88 | 984 | qemu_tcg_init_vcpu(env); |
0ab07c62 | 985 | } |
296af7c9 BS |
986 | } |
987 | ||
988 | void qemu_notify_event(void) | |
989 | { | |
990 | qemu_event_increment(); | |
991 | } | |
992 | ||
993 | static void qemu_system_vmstop_request(int reason) | |
994 | { | |
995 | vmstop_requested = reason; | |
996 | qemu_notify_event(); | |
997 | } | |
998 | ||
b4a3d965 JK |
999 | void cpu_stop_current(void) |
1000 | { | |
1001 | if (cpu_single_env) { | |
1002 | cpu_single_env->stopped = 1; | |
1003 | cpu_exit(cpu_single_env); | |
1004 | } | |
1005 | } | |
1006 | ||
296af7c9 BS |
1007 | void vm_stop(int reason) |
1008 | { | |
1009 | QemuThread me; | |
1010 | qemu_thread_self(&me); | |
1011 | ||
1012 | if (!qemu_thread_equal(&me, &io_thread)) { | |
1013 | qemu_system_vmstop_request(reason); | |
1014 | /* | |
1015 | * FIXME: should not return to device code in case | |
1016 | * vm_stop() has been requested. | |
1017 | */ | |
b4a3d965 | 1018 | cpu_stop_current(); |
296af7c9 BS |
1019 | return; |
1020 | } | |
1021 | do_vm_stop(reason); | |
1022 | } | |
1023 | ||
1024 | #endif | |
1025 | ||
1026 | static int qemu_cpu_exec(CPUState *env) | |
1027 | { | |
1028 | int ret; | |
1029 | #ifdef CONFIG_PROFILER | |
1030 | int64_t ti; | |
1031 | #endif | |
1032 | ||
1033 | #ifdef CONFIG_PROFILER | |
1034 | ti = profile_getclock(); | |
1035 | #endif | |
1036 | if (use_icount) { | |
1037 | int64_t count; | |
1038 | int decr; | |
1039 | qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1040 | env->icount_decr.u16.low = 0; | |
1041 | env->icount_extra = 0; | |
1042 | count = qemu_icount_round (qemu_next_deadline()); | |
1043 | qemu_icount += count; | |
1044 | decr = (count > 0xffff) ? 0xffff : count; | |
1045 | count -= decr; | |
1046 | env->icount_decr.u16.low = decr; | |
1047 | env->icount_extra = count; | |
1048 | } | |
1049 | ret = cpu_exec(env); | |
1050 | #ifdef CONFIG_PROFILER | |
1051 | qemu_time += profile_getclock() - ti; | |
1052 | #endif | |
1053 | if (use_icount) { | |
1054 | /* Fold pending instructions back into the | |
1055 | instruction counter, and clear the interrupt flag. */ | |
1056 | qemu_icount -= (env->icount_decr.u16.low | |
1057 | + env->icount_extra); | |
1058 | env->icount_decr.u32 = 0; | |
1059 | env->icount_extra = 0; | |
1060 | } | |
1061 | return ret; | |
1062 | } | |
1063 | ||
472fb0c4 | 1064 | bool cpu_exec_all(void) |
296af7c9 | 1065 | { |
9a36085b JK |
1066 | int r; |
1067 | ||
0ab07c62 | 1068 | if (next_cpu == NULL) { |
296af7c9 | 1069 | next_cpu = first_cpu; |
0ab07c62 | 1070 | } |
c629a4bc | 1071 | for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { |
345f4426 | 1072 | CPUState *env = next_cpu; |
296af7c9 BS |
1073 | |
1074 | qemu_clock_enable(vm_clock, | |
345f4426 | 1075 | (env->singlestep_enabled & SSTEP_NOTIMER) == 0); |
296af7c9 | 1076 | |
0ab07c62 | 1077 | if (qemu_alarm_pending()) { |
296af7c9 | 1078 | break; |
0ab07c62 | 1079 | } |
3c638d06 | 1080 | if (cpu_can_run(env)) { |
9a36085b JK |
1081 | r = qemu_cpu_exec(env); |
1082 | if (kvm_enabled()) { | |
1083 | qemu_kvm_eat_signals(env); | |
1084 | } | |
1085 | if (r == EXCP_DEBUG) { | |
3c638d06 JK |
1086 | break; |
1087 | } | |
1088 | } else if (env->stop) { | |
296af7c9 BS |
1089 | break; |
1090 | } | |
1091 | } | |
c629a4bc | 1092 | exit_request = 0; |
16400322 | 1093 | return !all_cpu_threads_idle(); |
296af7c9 BS |
1094 | } |
1095 | ||
1096 | void set_numa_modes(void) | |
1097 | { | |
1098 | CPUState *env; | |
1099 | int i; | |
1100 | ||
1101 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1102 | for (i = 0; i < nb_numa_nodes; i++) { | |
1103 | if (node_cpumask[i] & (1 << env->cpu_index)) { | |
1104 | env->numa_node = i; | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | void set_cpu_log(const char *optarg) | |
1111 | { | |
1112 | int mask; | |
1113 | const CPULogItem *item; | |
1114 | ||
1115 | mask = cpu_str_to_log_mask(optarg); | |
1116 | if (!mask) { | |
1117 | printf("Log items (comma separated):\n"); | |
1118 | for (item = cpu_log_items; item->mask != 0; item++) { | |
1119 | printf("%-10s %s\n", item->name, item->help); | |
1120 | } | |
1121 | exit(1); | |
1122 | } | |
1123 | cpu_set_log(mask); | |
1124 | } | |
29e922b6 BS |
1125 | |
1126 | /* Return the virtual CPU time, based on the instruction counter. */ | |
1127 | int64_t cpu_get_icount(void) | |
1128 | { | |
1129 | int64_t icount; | |
1130 | CPUState *env = cpu_single_env;; | |
1131 | ||
1132 | icount = qemu_icount; | |
1133 | if (env) { | |
1134 | if (!can_do_io(env)) { | |
1135 | fprintf(stderr, "Bad clock read\n"); | |
1136 | } | |
1137 | icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1138 | } | |
1139 | return qemu_icount_bias + (icount << icount_time_shift); | |
1140 | } | |
262353cb | 1141 | |
9a78eead | 1142 | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) |
262353cb BS |
1143 | { |
1144 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
1145 | #if defined(cpu_list_id) | |
1146 | cpu_list_id(f, cpu_fprintf, optarg); | |
1147 | #elif defined(cpu_list) | |
1148 | cpu_list(f, cpu_fprintf); /* deprecated */ | |
1149 | #endif | |
1150 | } |