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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 | #include "qmp-commands.h" | |
34 | ||
35 | #include "qemu-thread.h" | |
36 | #include "cpus.h" | |
37 | #include "qtest.h" | |
38 | #include "main-loop.h" | |
39 | ||
40 | #ifndef _WIN32 | |
41 | #include "compatfd.h" | |
42 | #endif | |
43 | ||
44 | #ifdef CONFIG_LINUX | |
45 | ||
46 | #include <sys/prctl.h> | |
47 | ||
48 | #ifndef PR_MCE_KILL | |
49 | #define PR_MCE_KILL 33 | |
50 | #endif | |
51 | ||
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 | ||
62 | static CPUArchState *next_cpu; | |
63 | ||
64 | /***********************************************************/ | |
65 | /* guest cycle counter */ | |
66 | ||
67 | /* Conversion factor from emulated instructions to virtual clock ticks. */ | |
68 | static int icount_time_shift; | |
69 | /* Arbitrarily pick 1MIPS as the minimum allowable speed. */ | |
70 | #define MAX_ICOUNT_SHIFT 10 | |
71 | /* Compensate for varying guest execution speed. */ | |
72 | static int64_t qemu_icount_bias; | |
73 | static QEMUTimer *icount_rt_timer; | |
74 | static QEMUTimer *icount_vm_timer; | |
75 | static QEMUTimer *icount_warp_timer; | |
76 | static int64_t vm_clock_warp_start; | |
77 | static int64_t qemu_icount; | |
78 | ||
79 | typedef struct TimersState { | |
80 | int64_t cpu_ticks_prev; | |
81 | int64_t cpu_ticks_offset; | |
82 | int64_t cpu_clock_offset; | |
83 | int32_t cpu_ticks_enabled; | |
84 | int64_t dummy; | |
85 | } TimersState; | |
86 | ||
87 | TimersState timers_state; | |
88 | ||
89 | /* Return the virtual CPU time, based on the instruction counter. */ | |
90 | int64_t cpu_get_icount(void) | |
91 | { | |
92 | int64_t icount; | |
93 | CPUArchState *env = cpu_single_env; | |
94 | ||
95 | icount = qemu_icount; | |
96 | if (env) { | |
97 | if (!can_do_io(env)) { | |
98 | fprintf(stderr, "Bad clock read\n"); | |
99 | } | |
100 | icount -= (env->icount_decr.u16.low + env->icount_extra); | |
101 | } | |
102 | return qemu_icount_bias + (icount << icount_time_shift); | |
103 | } | |
104 | ||
105 | /* return the host CPU cycle counter and handle stop/restart */ | |
106 | int64_t cpu_get_ticks(void) | |
107 | { | |
108 | if (use_icount) { | |
109 | return cpu_get_icount(); | |
110 | } | |
111 | if (!timers_state.cpu_ticks_enabled) { | |
112 | return timers_state.cpu_ticks_offset; | |
113 | } else { | |
114 | int64_t ticks; | |
115 | ticks = cpu_get_real_ticks(); | |
116 | if (timers_state.cpu_ticks_prev > ticks) { | |
117 | /* Note: non increasing ticks may happen if the host uses | |
118 | software suspend */ | |
119 | timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; | |
120 | } | |
121 | timers_state.cpu_ticks_prev = ticks; | |
122 | return ticks + timers_state.cpu_ticks_offset; | |
123 | } | |
124 | } | |
125 | ||
126 | /* return the host CPU monotonic timer and handle stop/restart */ | |
127 | int64_t cpu_get_clock(void) | |
128 | { | |
129 | int64_t ti; | |
130 | if (!timers_state.cpu_ticks_enabled) { | |
131 | return timers_state.cpu_clock_offset; | |
132 | } else { | |
133 | ti = get_clock(); | |
134 | return ti + timers_state.cpu_clock_offset; | |
135 | } | |
136 | } | |
137 | ||
138 | /* enable cpu_get_ticks() */ | |
139 | void cpu_enable_ticks(void) | |
140 | { | |
141 | if (!timers_state.cpu_ticks_enabled) { | |
142 | timers_state.cpu_ticks_offset -= cpu_get_real_ticks(); | |
143 | timers_state.cpu_clock_offset -= get_clock(); | |
144 | timers_state.cpu_ticks_enabled = 1; | |
145 | } | |
146 | } | |
147 | ||
148 | /* disable cpu_get_ticks() : the clock is stopped. You must not call | |
149 | cpu_get_ticks() after that. */ | |
150 | void cpu_disable_ticks(void) | |
151 | { | |
152 | if (timers_state.cpu_ticks_enabled) { | |
153 | timers_state.cpu_ticks_offset = cpu_get_ticks(); | |
154 | timers_state.cpu_clock_offset = cpu_get_clock(); | |
155 | timers_state.cpu_ticks_enabled = 0; | |
156 | } | |
157 | } | |
158 | ||
159 | /* Correlation between real and virtual time is always going to be | |
160 | fairly approximate, so ignore small variation. | |
161 | When the guest is idle real and virtual time will be aligned in | |
162 | the IO wait loop. */ | |
163 | #define ICOUNT_WOBBLE (get_ticks_per_sec() / 10) | |
164 | ||
165 | static void icount_adjust(void) | |
166 | { | |
167 | int64_t cur_time; | |
168 | int64_t cur_icount; | |
169 | int64_t delta; | |
170 | static int64_t last_delta; | |
171 | /* If the VM is not running, then do nothing. */ | |
172 | if (!runstate_is_running()) { | |
173 | return; | |
174 | } | |
175 | cur_time = cpu_get_clock(); | |
176 | cur_icount = qemu_get_clock_ns(vm_clock); | |
177 | delta = cur_icount - cur_time; | |
178 | /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */ | |
179 | if (delta > 0 | |
180 | && last_delta + ICOUNT_WOBBLE < delta * 2 | |
181 | && icount_time_shift > 0) { | |
182 | /* The guest is getting too far ahead. Slow time down. */ | |
183 | icount_time_shift--; | |
184 | } | |
185 | if (delta < 0 | |
186 | && last_delta - ICOUNT_WOBBLE > delta * 2 | |
187 | && icount_time_shift < MAX_ICOUNT_SHIFT) { | |
188 | /* The guest is getting too far behind. Speed time up. */ | |
189 | icount_time_shift++; | |
190 | } | |
191 | last_delta = delta; | |
192 | qemu_icount_bias = cur_icount - (qemu_icount << icount_time_shift); | |
193 | } | |
194 | ||
195 | static void icount_adjust_rt(void *opaque) | |
196 | { | |
197 | qemu_mod_timer(icount_rt_timer, | |
198 | qemu_get_clock_ms(rt_clock) + 1000); | |
199 | icount_adjust(); | |
200 | } | |
201 | ||
202 | static void icount_adjust_vm(void *opaque) | |
203 | { | |
204 | qemu_mod_timer(icount_vm_timer, | |
205 | qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10); | |
206 | icount_adjust(); | |
207 | } | |
208 | ||
209 | static int64_t qemu_icount_round(int64_t count) | |
210 | { | |
211 | return (count + (1 << icount_time_shift) - 1) >> icount_time_shift; | |
212 | } | |
213 | ||
214 | static void icount_warp_rt(void *opaque) | |
215 | { | |
216 | if (vm_clock_warp_start == -1) { | |
217 | return; | |
218 | } | |
219 | ||
220 | if (runstate_is_running()) { | |
221 | int64_t clock = qemu_get_clock_ns(rt_clock); | |
222 | int64_t warp_delta = clock - vm_clock_warp_start; | |
223 | if (use_icount == 1) { | |
224 | qemu_icount_bias += warp_delta; | |
225 | } else { | |
226 | /* | |
227 | * In adaptive mode, do not let the vm_clock run too | |
228 | * far ahead of real time. | |
229 | */ | |
230 | int64_t cur_time = cpu_get_clock(); | |
231 | int64_t cur_icount = qemu_get_clock_ns(vm_clock); | |
232 | int64_t delta = cur_time - cur_icount; | |
233 | qemu_icount_bias += MIN(warp_delta, delta); | |
234 | } | |
235 | if (qemu_clock_expired(vm_clock)) { | |
236 | qemu_notify_event(); | |
237 | } | |
238 | } | |
239 | vm_clock_warp_start = -1; | |
240 | } | |
241 | ||
242 | void qtest_clock_warp(int64_t dest) | |
243 | { | |
244 | int64_t clock = qemu_get_clock_ns(vm_clock); | |
245 | assert(qtest_enabled()); | |
246 | while (clock < dest) { | |
247 | int64_t deadline = qemu_clock_deadline(vm_clock); | |
248 | int64_t warp = MIN(dest - clock, deadline); | |
249 | qemu_icount_bias += warp; | |
250 | qemu_run_timers(vm_clock); | |
251 | clock = qemu_get_clock_ns(vm_clock); | |
252 | } | |
253 | qemu_notify_event(); | |
254 | } | |
255 | ||
256 | void qemu_clock_warp(QEMUClock *clock) | |
257 | { | |
258 | int64_t deadline; | |
259 | ||
260 | /* | |
261 | * There are too many global variables to make the "warp" behavior | |
262 | * applicable to other clocks. But a clock argument removes the | |
263 | * need for if statements all over the place. | |
264 | */ | |
265 | if (clock != vm_clock || !use_icount) { | |
266 | return; | |
267 | } | |
268 | ||
269 | /* | |
270 | * If the CPUs have been sleeping, advance the vm_clock timer now. This | |
271 | * ensures that the deadline for the timer is computed correctly below. | |
272 | * This also makes sure that the insn counter is synchronized before the | |
273 | * CPU starts running, in case the CPU is woken by an event other than | |
274 | * the earliest vm_clock timer. | |
275 | */ | |
276 | icount_warp_rt(NULL); | |
277 | if (!all_cpu_threads_idle() || !qemu_clock_has_timers(vm_clock)) { | |
278 | qemu_del_timer(icount_warp_timer); | |
279 | return; | |
280 | } | |
281 | ||
282 | if (qtest_enabled()) { | |
283 | /* When testing, qtest commands advance icount. */ | |
284 | return; | |
285 | } | |
286 | ||
287 | vm_clock_warp_start = qemu_get_clock_ns(rt_clock); | |
288 | deadline = qemu_clock_deadline(vm_clock); | |
289 | if (deadline > 0) { | |
290 | /* | |
291 | * Ensure the vm_clock proceeds even when the virtual CPU goes to | |
292 | * sleep. Otherwise, the CPU might be waiting for a future timer | |
293 | * interrupt to wake it up, but the interrupt never comes because | |
294 | * the vCPU isn't running any insns and thus doesn't advance the | |
295 | * vm_clock. | |
296 | * | |
297 | * An extreme solution for this problem would be to never let VCPUs | |
298 | * sleep in icount mode if there is a pending vm_clock timer; rather | |
299 | * time could just advance to the next vm_clock event. Instead, we | |
300 | * do stop VCPUs and only advance vm_clock after some "real" time, | |
301 | * (related to the time left until the next event) has passed. This | |
302 | * rt_clock timer will do this. This avoids that the warps are too | |
303 | * visible externally---for example, you will not be sending network | |
304 | * packets continuously instead of every 100ms. | |
305 | */ | |
306 | qemu_mod_timer(icount_warp_timer, vm_clock_warp_start + deadline); | |
307 | } else { | |
308 | qemu_notify_event(); | |
309 | } | |
310 | } | |
311 | ||
312 | static const VMStateDescription vmstate_timers = { | |
313 | .name = "timer", | |
314 | .version_id = 2, | |
315 | .minimum_version_id = 1, | |
316 | .minimum_version_id_old = 1, | |
317 | .fields = (VMStateField[]) { | |
318 | VMSTATE_INT64(cpu_ticks_offset, TimersState), | |
319 | VMSTATE_INT64(dummy, TimersState), | |
320 | VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2), | |
321 | VMSTATE_END_OF_LIST() | |
322 | } | |
323 | }; | |
324 | ||
325 | void configure_icount(const char *option) | |
326 | { | |
327 | vmstate_register(NULL, 0, &vmstate_timers, &timers_state); | |
328 | if (!option) { | |
329 | return; | |
330 | } | |
331 | ||
332 | icount_warp_timer = qemu_new_timer_ns(rt_clock, icount_warp_rt, NULL); | |
333 | if (strcmp(option, "auto") != 0) { | |
334 | icount_time_shift = strtol(option, NULL, 0); | |
335 | use_icount = 1; | |
336 | return; | |
337 | } | |
338 | ||
339 | use_icount = 2; | |
340 | ||
341 | /* 125MIPS seems a reasonable initial guess at the guest speed. | |
342 | It will be corrected fairly quickly anyway. */ | |
343 | icount_time_shift = 3; | |
344 | ||
345 | /* Have both realtime and virtual time triggers for speed adjustment. | |
346 | The realtime trigger catches emulated time passing too slowly, | |
347 | the virtual time trigger catches emulated time passing too fast. | |
348 | Realtime triggers occur even when idle, so use them less frequently | |
349 | than VM triggers. */ | |
350 | icount_rt_timer = qemu_new_timer_ms(rt_clock, icount_adjust_rt, NULL); | |
351 | qemu_mod_timer(icount_rt_timer, | |
352 | qemu_get_clock_ms(rt_clock) + 1000); | |
353 | icount_vm_timer = qemu_new_timer_ns(vm_clock, icount_adjust_vm, NULL); | |
354 | qemu_mod_timer(icount_vm_timer, | |
355 | qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 10); | |
356 | } | |
357 | ||
358 | /***********************************************************/ | |
359 | void hw_error(const char *fmt, ...) | |
360 | { | |
361 | va_list ap; | |
362 | CPUArchState *env; | |
363 | ||
364 | va_start(ap, fmt); | |
365 | fprintf(stderr, "qemu: hardware error: "); | |
366 | vfprintf(stderr, fmt, ap); | |
367 | fprintf(stderr, "\n"); | |
368 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
369 | fprintf(stderr, "CPU #%d:\n", env->cpu_index); | |
370 | #ifdef TARGET_I386 | |
371 | cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU); | |
372 | #else | |
373 | cpu_dump_state(env, stderr, fprintf, 0); | |
374 | #endif | |
375 | } | |
376 | va_end(ap); | |
377 | abort(); | |
378 | } | |
379 | ||
380 | void cpu_synchronize_all_states(void) | |
381 | { | |
382 | CPUArchState *cpu; | |
383 | ||
384 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
385 | cpu_synchronize_state(cpu); | |
386 | } | |
387 | } | |
388 | ||
389 | void cpu_synchronize_all_post_reset(void) | |
390 | { | |
391 | CPUArchState *cpu; | |
392 | ||
393 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
394 | cpu_synchronize_post_reset(cpu); | |
395 | } | |
396 | } | |
397 | ||
398 | void cpu_synchronize_all_post_init(void) | |
399 | { | |
400 | CPUArchState *cpu; | |
401 | ||
402 | for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) { | |
403 | cpu_synchronize_post_init(cpu); | |
404 | } | |
405 | } | |
406 | ||
407 | int cpu_is_stopped(CPUArchState *env) | |
408 | { | |
409 | return !runstate_is_running() || env->stopped; | |
410 | } | |
411 | ||
412 | static void do_vm_stop(RunState state) | |
413 | { | |
414 | if (runstate_is_running()) { | |
415 | cpu_disable_ticks(); | |
416 | pause_all_vcpus(); | |
417 | runstate_set(state); | |
418 | vm_state_notify(0, state); | |
419 | bdrv_drain_all(); | |
420 | bdrv_flush_all(); | |
421 | monitor_protocol_event(QEVENT_STOP, NULL); | |
422 | } | |
423 | } | |
424 | ||
425 | static int cpu_can_run(CPUArchState *env) | |
426 | { | |
427 | if (env->stop) { | |
428 | return 0; | |
429 | } | |
430 | if (env->stopped || !runstate_is_running()) { | |
431 | return 0; | |
432 | } | |
433 | return 1; | |
434 | } | |
435 | ||
436 | static bool cpu_thread_is_idle(CPUArchState *env) | |
437 | { | |
438 | if (env->stop || env->queued_work_first) { | |
439 | return false; | |
440 | } | |
441 | if (env->stopped || !runstate_is_running()) { | |
442 | return true; | |
443 | } | |
444 | if (!env->halted || qemu_cpu_has_work(env) || kvm_irqchip_in_kernel()) { | |
445 | return false; | |
446 | } | |
447 | return true; | |
448 | } | |
449 | ||
450 | bool all_cpu_threads_idle(void) | |
451 | { | |
452 | CPUArchState *env; | |
453 | ||
454 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
455 | if (!cpu_thread_is_idle(env)) { | |
456 | return false; | |
457 | } | |
458 | } | |
459 | return true; | |
460 | } | |
461 | ||
462 | static void cpu_handle_guest_debug(CPUArchState *env) | |
463 | { | |
464 | gdb_set_stop_cpu(env); | |
465 | qemu_system_debug_request(); | |
466 | env->stopped = 1; | |
467 | } | |
468 | ||
469 | static void cpu_signal(int sig) | |
470 | { | |
471 | if (cpu_single_env) { | |
472 | cpu_exit(cpu_single_env); | |
473 | } | |
474 | exit_request = 1; | |
475 | } | |
476 | ||
477 | #ifdef CONFIG_LINUX | |
478 | static void sigbus_reraise(void) | |
479 | { | |
480 | sigset_t set; | |
481 | struct sigaction action; | |
482 | ||
483 | memset(&action, 0, sizeof(action)); | |
484 | action.sa_handler = SIG_DFL; | |
485 | if (!sigaction(SIGBUS, &action, NULL)) { | |
486 | raise(SIGBUS); | |
487 | sigemptyset(&set); | |
488 | sigaddset(&set, SIGBUS); | |
489 | sigprocmask(SIG_UNBLOCK, &set, NULL); | |
490 | } | |
491 | perror("Failed to re-raise SIGBUS!\n"); | |
492 | abort(); | |
493 | } | |
494 | ||
495 | static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo, | |
496 | void *ctx) | |
497 | { | |
498 | if (kvm_on_sigbus(siginfo->ssi_code, | |
499 | (void *)(intptr_t)siginfo->ssi_addr)) { | |
500 | sigbus_reraise(); | |
501 | } | |
502 | } | |
503 | ||
504 | static void qemu_init_sigbus(void) | |
505 | { | |
506 | struct sigaction action; | |
507 | ||
508 | memset(&action, 0, sizeof(action)); | |
509 | action.sa_flags = SA_SIGINFO; | |
510 | action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler; | |
511 | sigaction(SIGBUS, &action, NULL); | |
512 | ||
513 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
514 | } | |
515 | ||
516 | static void qemu_kvm_eat_signals(CPUArchState *env) | |
517 | { | |
518 | struct timespec ts = { 0, 0 }; | |
519 | siginfo_t siginfo; | |
520 | sigset_t waitset; | |
521 | sigset_t chkset; | |
522 | int r; | |
523 | ||
524 | sigemptyset(&waitset); | |
525 | sigaddset(&waitset, SIG_IPI); | |
526 | sigaddset(&waitset, SIGBUS); | |
527 | ||
528 | do { | |
529 | r = sigtimedwait(&waitset, &siginfo, &ts); | |
530 | if (r == -1 && !(errno == EAGAIN || errno == EINTR)) { | |
531 | perror("sigtimedwait"); | |
532 | exit(1); | |
533 | } | |
534 | ||
535 | switch (r) { | |
536 | case SIGBUS: | |
537 | if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) { | |
538 | sigbus_reraise(); | |
539 | } | |
540 | break; | |
541 | default: | |
542 | break; | |
543 | } | |
544 | ||
545 | r = sigpending(&chkset); | |
546 | if (r == -1) { | |
547 | perror("sigpending"); | |
548 | exit(1); | |
549 | } | |
550 | } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS)); | |
551 | } | |
552 | ||
553 | #else /* !CONFIG_LINUX */ | |
554 | ||
555 | static void qemu_init_sigbus(void) | |
556 | { | |
557 | } | |
558 | ||
559 | static void qemu_kvm_eat_signals(CPUArchState *env) | |
560 | { | |
561 | } | |
562 | #endif /* !CONFIG_LINUX */ | |
563 | ||
564 | #ifndef _WIN32 | |
565 | static void dummy_signal(int sig) | |
566 | { | |
567 | } | |
568 | ||
569 | static void qemu_kvm_init_cpu_signals(CPUArchState *env) | |
570 | { | |
571 | int r; | |
572 | sigset_t set; | |
573 | struct sigaction sigact; | |
574 | ||
575 | memset(&sigact, 0, sizeof(sigact)); | |
576 | sigact.sa_handler = dummy_signal; | |
577 | sigaction(SIG_IPI, &sigact, NULL); | |
578 | ||
579 | pthread_sigmask(SIG_BLOCK, NULL, &set); | |
580 | sigdelset(&set, SIG_IPI); | |
581 | sigdelset(&set, SIGBUS); | |
582 | r = kvm_set_signal_mask(env, &set); | |
583 | if (r) { | |
584 | fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r)); | |
585 | exit(1); | |
586 | } | |
587 | } | |
588 | ||
589 | static void qemu_tcg_init_cpu_signals(void) | |
590 | { | |
591 | sigset_t set; | |
592 | struct sigaction sigact; | |
593 | ||
594 | memset(&sigact, 0, sizeof(sigact)); | |
595 | sigact.sa_handler = cpu_signal; | |
596 | sigaction(SIG_IPI, &sigact, NULL); | |
597 | ||
598 | sigemptyset(&set); | |
599 | sigaddset(&set, SIG_IPI); | |
600 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
601 | } | |
602 | ||
603 | #else /* _WIN32 */ | |
604 | static void qemu_kvm_init_cpu_signals(CPUArchState *env) | |
605 | { | |
606 | abort(); | |
607 | } | |
608 | ||
609 | static void qemu_tcg_init_cpu_signals(void) | |
610 | { | |
611 | } | |
612 | #endif /* _WIN32 */ | |
613 | ||
614 | QemuMutex qemu_global_mutex; | |
615 | static QemuCond qemu_io_proceeded_cond; | |
616 | static bool iothread_requesting_mutex; | |
617 | ||
618 | static QemuThread io_thread; | |
619 | ||
620 | static QemuThread *tcg_cpu_thread; | |
621 | static QemuCond *tcg_halt_cond; | |
622 | ||
623 | /* cpu creation */ | |
624 | static QemuCond qemu_cpu_cond; | |
625 | /* system init */ | |
626 | static QemuCond qemu_pause_cond; | |
627 | static QemuCond qemu_work_cond; | |
628 | ||
629 | void qemu_init_cpu_loop(void) | |
630 | { | |
631 | qemu_init_sigbus(); | |
632 | qemu_cond_init(&qemu_cpu_cond); | |
633 | qemu_cond_init(&qemu_pause_cond); | |
634 | qemu_cond_init(&qemu_work_cond); | |
635 | qemu_cond_init(&qemu_io_proceeded_cond); | |
636 | qemu_mutex_init(&qemu_global_mutex); | |
637 | ||
638 | qemu_thread_get_self(&io_thread); | |
639 | } | |
640 | ||
641 | void run_on_cpu(CPUArchState *env, void (*func)(void *data), void *data) | |
642 | { | |
643 | struct qemu_work_item wi; | |
644 | ||
645 | if (qemu_cpu_is_self(env)) { | |
646 | func(data); | |
647 | return; | |
648 | } | |
649 | ||
650 | wi.func = func; | |
651 | wi.data = data; | |
652 | if (!env->queued_work_first) { | |
653 | env->queued_work_first = &wi; | |
654 | } else { | |
655 | env->queued_work_last->next = &wi; | |
656 | } | |
657 | env->queued_work_last = &wi; | |
658 | wi.next = NULL; | |
659 | wi.done = false; | |
660 | ||
661 | qemu_cpu_kick(env); | |
662 | while (!wi.done) { | |
663 | CPUArchState *self_env = cpu_single_env; | |
664 | ||
665 | qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex); | |
666 | cpu_single_env = self_env; | |
667 | } | |
668 | } | |
669 | ||
670 | static void flush_queued_work(CPUArchState *env) | |
671 | { | |
672 | struct qemu_work_item *wi; | |
673 | ||
674 | if (!env->queued_work_first) { | |
675 | return; | |
676 | } | |
677 | ||
678 | while ((wi = env->queued_work_first)) { | |
679 | env->queued_work_first = wi->next; | |
680 | wi->func(wi->data); | |
681 | wi->done = true; | |
682 | } | |
683 | env->queued_work_last = NULL; | |
684 | qemu_cond_broadcast(&qemu_work_cond); | |
685 | } | |
686 | ||
687 | static void qemu_wait_io_event_common(CPUArchState *env) | |
688 | { | |
689 | if (env->stop) { | |
690 | env->stop = 0; | |
691 | env->stopped = 1; | |
692 | qemu_cond_signal(&qemu_pause_cond); | |
693 | } | |
694 | flush_queued_work(env); | |
695 | env->thread_kicked = false; | |
696 | } | |
697 | ||
698 | static void qemu_tcg_wait_io_event(void) | |
699 | { | |
700 | CPUArchState *env; | |
701 | ||
702 | while (all_cpu_threads_idle()) { | |
703 | /* Start accounting real time to the virtual clock if the CPUs | |
704 | are idle. */ | |
705 | qemu_clock_warp(vm_clock); | |
706 | qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); | |
707 | } | |
708 | ||
709 | while (iothread_requesting_mutex) { | |
710 | qemu_cond_wait(&qemu_io_proceeded_cond, &qemu_global_mutex); | |
711 | } | |
712 | ||
713 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
714 | qemu_wait_io_event_common(env); | |
715 | } | |
716 | } | |
717 | ||
718 | static void qemu_kvm_wait_io_event(CPUArchState *env) | |
719 | { | |
720 | while (cpu_thread_is_idle(env)) { | |
721 | qemu_cond_wait(env->halt_cond, &qemu_global_mutex); | |
722 | } | |
723 | ||
724 | qemu_kvm_eat_signals(env); | |
725 | qemu_wait_io_event_common(env); | |
726 | } | |
727 | ||
728 | static void *qemu_kvm_cpu_thread_fn(void *arg) | |
729 | { | |
730 | CPUArchState *env = arg; | |
731 | int r; | |
732 | ||
733 | qemu_mutex_lock(&qemu_global_mutex); | |
734 | qemu_thread_get_self(env->thread); | |
735 | env->thread_id = qemu_get_thread_id(); | |
736 | cpu_single_env = env; | |
737 | ||
738 | r = kvm_init_vcpu(env); | |
739 | if (r < 0) { | |
740 | fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r)); | |
741 | exit(1); | |
742 | } | |
743 | ||
744 | qemu_kvm_init_cpu_signals(env); | |
745 | ||
746 | /* signal CPU creation */ | |
747 | env->created = 1; | |
748 | qemu_cond_signal(&qemu_cpu_cond); | |
749 | ||
750 | while (1) { | |
751 | if (cpu_can_run(env)) { | |
752 | r = kvm_cpu_exec(env); | |
753 | if (r == EXCP_DEBUG) { | |
754 | cpu_handle_guest_debug(env); | |
755 | } | |
756 | } | |
757 | qemu_kvm_wait_io_event(env); | |
758 | } | |
759 | ||
760 | return NULL; | |
761 | } | |
762 | ||
763 | static void *qemu_dummy_cpu_thread_fn(void *arg) | |
764 | { | |
765 | #ifdef _WIN32 | |
766 | fprintf(stderr, "qtest is not supported under Windows\n"); | |
767 | exit(1); | |
768 | #else | |
769 | CPUArchState *env = arg; | |
770 | sigset_t waitset; | |
771 | int r; | |
772 | ||
773 | qemu_mutex_lock_iothread(); | |
774 | qemu_thread_get_self(env->thread); | |
775 | env->thread_id = qemu_get_thread_id(); | |
776 | ||
777 | sigemptyset(&waitset); | |
778 | sigaddset(&waitset, SIG_IPI); | |
779 | ||
780 | /* signal CPU creation */ | |
781 | env->created = 1; | |
782 | qemu_cond_signal(&qemu_cpu_cond); | |
783 | ||
784 | cpu_single_env = env; | |
785 | while (1) { | |
786 | cpu_single_env = NULL; | |
787 | qemu_mutex_unlock_iothread(); | |
788 | do { | |
789 | int sig; | |
790 | r = sigwait(&waitset, &sig); | |
791 | } while (r == -1 && (errno == EAGAIN || errno == EINTR)); | |
792 | if (r == -1) { | |
793 | perror("sigwait"); | |
794 | exit(1); | |
795 | } | |
796 | qemu_mutex_lock_iothread(); | |
797 | cpu_single_env = env; | |
798 | qemu_wait_io_event_common(env); | |
799 | } | |
800 | ||
801 | return NULL; | |
802 | #endif | |
803 | } | |
804 | ||
805 | static void tcg_exec_all(void); | |
806 | ||
807 | static void *qemu_tcg_cpu_thread_fn(void *arg) | |
808 | { | |
809 | CPUArchState *env = arg; | |
810 | ||
811 | qemu_tcg_init_cpu_signals(); | |
812 | qemu_thread_get_self(env->thread); | |
813 | ||
814 | /* signal CPU creation */ | |
815 | qemu_mutex_lock(&qemu_global_mutex); | |
816 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
817 | env->thread_id = qemu_get_thread_id(); | |
818 | env->created = 1; | |
819 | } | |
820 | qemu_cond_signal(&qemu_cpu_cond); | |
821 | ||
822 | /* wait for initial kick-off after machine start */ | |
823 | while (first_cpu->stopped) { | |
824 | qemu_cond_wait(tcg_halt_cond, &qemu_global_mutex); | |
825 | ||
826 | /* process any pending work */ | |
827 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
828 | qemu_wait_io_event_common(env); | |
829 | } | |
830 | } | |
831 | ||
832 | while (1) { | |
833 | tcg_exec_all(); | |
834 | if (use_icount && qemu_clock_deadline(vm_clock) <= 0) { | |
835 | qemu_notify_event(); | |
836 | } | |
837 | qemu_tcg_wait_io_event(); | |
838 | } | |
839 | ||
840 | return NULL; | |
841 | } | |
842 | ||
843 | static void qemu_cpu_kick_thread(CPUArchState *env) | |
844 | { | |
845 | #ifndef _WIN32 | |
846 | int err; | |
847 | ||
848 | err = pthread_kill(env->thread->thread, SIG_IPI); | |
849 | if (err) { | |
850 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); | |
851 | exit(1); | |
852 | } | |
853 | #else /* _WIN32 */ | |
854 | if (!qemu_cpu_is_self(env)) { | |
855 | SuspendThread(env->hThread); | |
856 | cpu_signal(0); | |
857 | ResumeThread(env->hThread); | |
858 | } | |
859 | #endif | |
860 | } | |
861 | ||
862 | void qemu_cpu_kick(void *_env) | |
863 | { | |
864 | CPUArchState *env = _env; | |
865 | ||
866 | qemu_cond_broadcast(env->halt_cond); | |
867 | if (!tcg_enabled() && !env->thread_kicked) { | |
868 | qemu_cpu_kick_thread(env); | |
869 | env->thread_kicked = true; | |
870 | } | |
871 | } | |
872 | ||
873 | void qemu_cpu_kick_self(void) | |
874 | { | |
875 | #ifndef _WIN32 | |
876 | assert(cpu_single_env); | |
877 | ||
878 | if (!cpu_single_env->thread_kicked) { | |
879 | qemu_cpu_kick_thread(cpu_single_env); | |
880 | cpu_single_env->thread_kicked = true; | |
881 | } | |
882 | #else | |
883 | abort(); | |
884 | #endif | |
885 | } | |
886 | ||
887 | int qemu_cpu_is_self(void *_env) | |
888 | { | |
889 | CPUArchState *env = _env; | |
890 | ||
891 | return qemu_thread_is_self(env->thread); | |
892 | } | |
893 | ||
894 | void qemu_mutex_lock_iothread(void) | |
895 | { | |
896 | if (!tcg_enabled()) { | |
897 | qemu_mutex_lock(&qemu_global_mutex); | |
898 | } else { | |
899 | iothread_requesting_mutex = true; | |
900 | if (qemu_mutex_trylock(&qemu_global_mutex)) { | |
901 | qemu_cpu_kick_thread(first_cpu); | |
902 | qemu_mutex_lock(&qemu_global_mutex); | |
903 | } | |
904 | iothread_requesting_mutex = false; | |
905 | qemu_cond_broadcast(&qemu_io_proceeded_cond); | |
906 | } | |
907 | } | |
908 | ||
909 | void qemu_mutex_unlock_iothread(void) | |
910 | { | |
911 | qemu_mutex_unlock(&qemu_global_mutex); | |
912 | } | |
913 | ||
914 | static int all_vcpus_paused(void) | |
915 | { | |
916 | CPUArchState *penv = first_cpu; | |
917 | ||
918 | while (penv) { | |
919 | if (!penv->stopped) { | |
920 | return 0; | |
921 | } | |
922 | penv = penv->next_cpu; | |
923 | } | |
924 | ||
925 | return 1; | |
926 | } | |
927 | ||
928 | void pause_all_vcpus(void) | |
929 | { | |
930 | CPUArchState *penv = first_cpu; | |
931 | ||
932 | qemu_clock_enable(vm_clock, false); | |
933 | while (penv) { | |
934 | penv->stop = 1; | |
935 | qemu_cpu_kick(penv); | |
936 | penv = penv->next_cpu; | |
937 | } | |
938 | ||
939 | if (!qemu_thread_is_self(&io_thread)) { | |
940 | cpu_stop_current(); | |
941 | if (!kvm_enabled()) { | |
942 | while (penv) { | |
943 | penv->stop = 0; | |
944 | penv->stopped = 1; | |
945 | penv = penv->next_cpu; | |
946 | } | |
947 | return; | |
948 | } | |
949 | } | |
950 | ||
951 | while (!all_vcpus_paused()) { | |
952 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); | |
953 | penv = first_cpu; | |
954 | while (penv) { | |
955 | qemu_cpu_kick(penv); | |
956 | penv = penv->next_cpu; | |
957 | } | |
958 | } | |
959 | } | |
960 | ||
961 | void resume_all_vcpus(void) | |
962 | { | |
963 | CPUArchState *penv = first_cpu; | |
964 | ||
965 | qemu_clock_enable(vm_clock, true); | |
966 | while (penv) { | |
967 | penv->stop = 0; | |
968 | penv->stopped = 0; | |
969 | qemu_cpu_kick(penv); | |
970 | penv = penv->next_cpu; | |
971 | } | |
972 | } | |
973 | ||
974 | static void qemu_tcg_init_vcpu(void *_env) | |
975 | { | |
976 | CPUArchState *env = _env; | |
977 | ||
978 | /* share a single thread for all cpus with TCG */ | |
979 | if (!tcg_cpu_thread) { | |
980 | env->thread = g_malloc0(sizeof(QemuThread)); | |
981 | env->halt_cond = g_malloc0(sizeof(QemuCond)); | |
982 | qemu_cond_init(env->halt_cond); | |
983 | tcg_halt_cond = env->halt_cond; | |
984 | qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env, | |
985 | QEMU_THREAD_JOINABLE); | |
986 | #ifdef _WIN32 | |
987 | env->hThread = qemu_thread_get_handle(env->thread); | |
988 | #endif | |
989 | while (env->created == 0) { | |
990 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
991 | } | |
992 | tcg_cpu_thread = env->thread; | |
993 | } else { | |
994 | env->thread = tcg_cpu_thread; | |
995 | env->halt_cond = tcg_halt_cond; | |
996 | } | |
997 | } | |
998 | ||
999 | static void qemu_kvm_start_vcpu(CPUArchState *env) | |
1000 | { | |
1001 | env->thread = g_malloc0(sizeof(QemuThread)); | |
1002 | env->halt_cond = g_malloc0(sizeof(QemuCond)); | |
1003 | qemu_cond_init(env->halt_cond); | |
1004 | qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env, | |
1005 | QEMU_THREAD_JOINABLE); | |
1006 | while (env->created == 0) { | |
1007 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | static void qemu_dummy_start_vcpu(CPUArchState *env) | |
1012 | { | |
1013 | env->thread = g_malloc0(sizeof(QemuThread)); | |
1014 | env->halt_cond = g_malloc0(sizeof(QemuCond)); | |
1015 | qemu_cond_init(env->halt_cond); | |
1016 | qemu_thread_create(env->thread, qemu_dummy_cpu_thread_fn, env, | |
1017 | QEMU_THREAD_JOINABLE); | |
1018 | while (env->created == 0) { | |
1019 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | void qemu_init_vcpu(void *_env) | |
1024 | { | |
1025 | CPUArchState *env = _env; | |
1026 | ||
1027 | env->nr_cores = smp_cores; | |
1028 | env->nr_threads = smp_threads; | |
1029 | env->stopped = 1; | |
1030 | if (kvm_enabled()) { | |
1031 | qemu_kvm_start_vcpu(env); | |
1032 | } else if (tcg_enabled()) { | |
1033 | qemu_tcg_init_vcpu(env); | |
1034 | } else { | |
1035 | qemu_dummy_start_vcpu(env); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | void cpu_stop_current(void) | |
1040 | { | |
1041 | if (cpu_single_env) { | |
1042 | cpu_single_env->stop = 0; | |
1043 | cpu_single_env->stopped = 1; | |
1044 | cpu_exit(cpu_single_env); | |
1045 | qemu_cond_signal(&qemu_pause_cond); | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | void vm_stop(RunState state) | |
1050 | { | |
1051 | if (!qemu_thread_is_self(&io_thread)) { | |
1052 | qemu_system_vmstop_request(state); | |
1053 | /* | |
1054 | * FIXME: should not return to device code in case | |
1055 | * vm_stop() has been requested. | |
1056 | */ | |
1057 | cpu_stop_current(); | |
1058 | return; | |
1059 | } | |
1060 | do_vm_stop(state); | |
1061 | } | |
1062 | ||
1063 | /* does a state transition even if the VM is already stopped, | |
1064 | current state is forgotten forever */ | |
1065 | void vm_stop_force_state(RunState state) | |
1066 | { | |
1067 | if (runstate_is_running()) { | |
1068 | vm_stop(state); | |
1069 | } else { | |
1070 | runstate_set(state); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | static int tcg_cpu_exec(CPUArchState *env) | |
1075 | { | |
1076 | int ret; | |
1077 | #ifdef CONFIG_PROFILER | |
1078 | int64_t ti; | |
1079 | #endif | |
1080 | ||
1081 | #ifdef CONFIG_PROFILER | |
1082 | ti = profile_getclock(); | |
1083 | #endif | |
1084 | if (use_icount) { | |
1085 | int64_t count; | |
1086 | int decr; | |
1087 | qemu_icount -= (env->icount_decr.u16.low + env->icount_extra); | |
1088 | env->icount_decr.u16.low = 0; | |
1089 | env->icount_extra = 0; | |
1090 | count = qemu_icount_round(qemu_clock_deadline(vm_clock)); | |
1091 | qemu_icount += count; | |
1092 | decr = (count > 0xffff) ? 0xffff : count; | |
1093 | count -= decr; | |
1094 | env->icount_decr.u16.low = decr; | |
1095 | env->icount_extra = count; | |
1096 | } | |
1097 | ret = cpu_exec(env); | |
1098 | #ifdef CONFIG_PROFILER | |
1099 | qemu_time += profile_getclock() - ti; | |
1100 | #endif | |
1101 | if (use_icount) { | |
1102 | /* Fold pending instructions back into the | |
1103 | instruction counter, and clear the interrupt flag. */ | |
1104 | qemu_icount -= (env->icount_decr.u16.low | |
1105 | + env->icount_extra); | |
1106 | env->icount_decr.u32 = 0; | |
1107 | env->icount_extra = 0; | |
1108 | } | |
1109 | return ret; | |
1110 | } | |
1111 | ||
1112 | static void tcg_exec_all(void) | |
1113 | { | |
1114 | int r; | |
1115 | ||
1116 | /* Account partial waits to the vm_clock. */ | |
1117 | qemu_clock_warp(vm_clock); | |
1118 | ||
1119 | if (next_cpu == NULL) { | |
1120 | next_cpu = first_cpu; | |
1121 | } | |
1122 | for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) { | |
1123 | CPUArchState *env = next_cpu; | |
1124 | ||
1125 | qemu_clock_enable(vm_clock, | |
1126 | (env->singlestep_enabled & SSTEP_NOTIMER) == 0); | |
1127 | ||
1128 | if (cpu_can_run(env)) { | |
1129 | r = tcg_cpu_exec(env); | |
1130 | if (r == EXCP_DEBUG) { | |
1131 | cpu_handle_guest_debug(env); | |
1132 | break; | |
1133 | } | |
1134 | } else if (env->stop || env->stopped) { | |
1135 | break; | |
1136 | } | |
1137 | } | |
1138 | exit_request = 0; | |
1139 | } | |
1140 | ||
1141 | void set_numa_modes(void) | |
1142 | { | |
1143 | CPUArchState *env; | |
1144 | int i; | |
1145 | ||
1146 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1147 | for (i = 0; i < nb_numa_nodes; i++) { | |
1148 | if (node_cpumask[i] & (1 << env->cpu_index)) { | |
1149 | env->numa_node = i; | |
1150 | } | |
1151 | } | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | void set_cpu_log(const char *optarg) | |
1156 | { | |
1157 | int mask; | |
1158 | const CPULogItem *item; | |
1159 | ||
1160 | mask = cpu_str_to_log_mask(optarg); | |
1161 | if (!mask) { | |
1162 | printf("Log items (comma separated):\n"); | |
1163 | for (item = cpu_log_items; item->mask != 0; item++) { | |
1164 | printf("%-10s %s\n", item->name, item->help); | |
1165 | } | |
1166 | exit(1); | |
1167 | } | |
1168 | cpu_set_log(mask); | |
1169 | } | |
1170 | ||
1171 | void set_cpu_log_filename(const char *optarg) | |
1172 | { | |
1173 | cpu_set_log_filename(optarg); | |
1174 | } | |
1175 | ||
1176 | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) | |
1177 | { | |
1178 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
1179 | #if defined(cpu_list_id) | |
1180 | cpu_list_id(f, cpu_fprintf, optarg); | |
1181 | #elif defined(cpu_list) | |
1182 | cpu_list(f, cpu_fprintf); /* deprecated */ | |
1183 | #endif | |
1184 | } | |
1185 | ||
1186 | CpuInfoList *qmp_query_cpus(Error **errp) | |
1187 | { | |
1188 | CpuInfoList *head = NULL, *cur_item = NULL; | |
1189 | CPUArchState *env; | |
1190 | ||
1191 | for(env = first_cpu; env != NULL; env = env->next_cpu) { | |
1192 | CpuInfoList *info; | |
1193 | ||
1194 | cpu_synchronize_state(env); | |
1195 | ||
1196 | info = g_malloc0(sizeof(*info)); | |
1197 | info->value = g_malloc0(sizeof(*info->value)); | |
1198 | info->value->CPU = env->cpu_index; | |
1199 | info->value->current = (env == first_cpu); | |
1200 | info->value->halted = env->halted; | |
1201 | info->value->thread_id = env->thread_id; | |
1202 | #if defined(TARGET_I386) | |
1203 | info->value->has_pc = true; | |
1204 | info->value->pc = env->eip + env->segs[R_CS].base; | |
1205 | #elif defined(TARGET_PPC) | |
1206 | info->value->has_nip = true; | |
1207 | info->value->nip = env->nip; | |
1208 | #elif defined(TARGET_SPARC) | |
1209 | info->value->has_pc = true; | |
1210 | info->value->pc = env->pc; | |
1211 | info->value->has_npc = true; | |
1212 | info->value->npc = env->npc; | |
1213 | #elif defined(TARGET_MIPS) | |
1214 | info->value->has_PC = true; | |
1215 | info->value->PC = env->active_tc.PC; | |
1216 | #endif | |
1217 | ||
1218 | /* XXX: waiting for the qapi to support GSList */ | |
1219 | if (!cur_item) { | |
1220 | head = cur_item = info; | |
1221 | } else { | |
1222 | cur_item->next = info; | |
1223 | cur_item = info; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | return head; | |
1228 | } | |
1229 | ||
1230 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, | |
1231 | bool has_cpu, int64_t cpu_index, Error **errp) | |
1232 | { | |
1233 | FILE *f; | |
1234 | uint32_t l; | |
1235 | CPUArchState *env; | |
1236 | uint8_t buf[1024]; | |
1237 | ||
1238 | if (!has_cpu) { | |
1239 | cpu_index = 0; | |
1240 | } | |
1241 | ||
1242 | for (env = first_cpu; env; env = env->next_cpu) { | |
1243 | if (cpu_index == env->cpu_index) { | |
1244 | break; | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | if (env == NULL) { | |
1249 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", | |
1250 | "a CPU number"); | |
1251 | return; | |
1252 | } | |
1253 | ||
1254 | f = fopen(filename, "wb"); | |
1255 | if (!f) { | |
1256 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
1257 | return; | |
1258 | } | |
1259 | ||
1260 | while (size != 0) { | |
1261 | l = sizeof(buf); | |
1262 | if (l > size) | |
1263 | l = size; | |
1264 | cpu_memory_rw_debug(env, addr, buf, l, 0); | |
1265 | if (fwrite(buf, 1, l, f) != l) { | |
1266 | error_set(errp, QERR_IO_ERROR); | |
1267 | goto exit; | |
1268 | } | |
1269 | addr += l; | |
1270 | size -= l; | |
1271 | } | |
1272 | ||
1273 | exit: | |
1274 | fclose(f); | |
1275 | } | |
1276 | ||
1277 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, | |
1278 | Error **errp) | |
1279 | { | |
1280 | FILE *f; | |
1281 | uint32_t l; | |
1282 | uint8_t buf[1024]; | |
1283 | ||
1284 | f = fopen(filename, "wb"); | |
1285 | if (!f) { | |
1286 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
1287 | return; | |
1288 | } | |
1289 | ||
1290 | while (size != 0) { | |
1291 | l = sizeof(buf); | |
1292 | if (l > size) | |
1293 | l = size; | |
1294 | cpu_physical_memory_rw(addr, buf, l, 0); | |
1295 | if (fwrite(buf, 1, l, f) != l) { | |
1296 | error_set(errp, QERR_IO_ERROR); | |
1297 | goto exit; | |
1298 | } | |
1299 | addr += l; | |
1300 | size -= l; | |
1301 | } | |
1302 | ||
1303 | exit: | |
1304 | fclose(f); | |
1305 | } | |
1306 | ||
1307 | void qmp_inject_nmi(Error **errp) | |
1308 | { | |
1309 | #if defined(TARGET_I386) | |
1310 | CPUArchState *env; | |
1311 | ||
1312 | for (env = first_cpu; env != NULL; env = env->next_cpu) { | |
1313 | if (!env->apic_state) { | |
1314 | cpu_interrupt(env, CPU_INTERRUPT_NMI); | |
1315 | } else { | |
1316 | apic_deliver_nmi(env->apic_state); | |
1317 | } | |
1318 | } | |
1319 | #else | |
1320 | error_set(errp, QERR_UNSUPPORTED); | |
1321 | #endif | |
1322 | } |