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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 | #include "qemu/osdep.h" | |
26 | #include "qemu/config-file.h" | |
27 | #include "cpu.h" | |
28 | #include "monitor/monitor.h" | |
29 | #include "qapi/error.h" | |
30 | #include "qapi/qapi-commands-misc.h" | |
31 | #include "qapi/qapi-events-run-state.h" | |
32 | #include "qapi/qmp/qerror.h" | |
33 | #include "qemu/error-report.h" | |
34 | #include "sysemu/sysemu.h" | |
35 | #include "sysemu/block-backend.h" | |
36 | #include "exec/gdbstub.h" | |
37 | #include "sysemu/dma.h" | |
38 | #include "sysemu/hw_accel.h" | |
39 | #include "sysemu/kvm.h" | |
40 | #include "sysemu/hax.h" | |
41 | #include "sysemu/hvf.h" | |
42 | #include "sysemu/whpx.h" | |
43 | #include "exec/exec-all.h" | |
44 | ||
45 | #include "qemu/thread.h" | |
46 | #include "sysemu/cpus.h" | |
47 | #include "sysemu/qtest.h" | |
48 | #include "qemu/main-loop.h" | |
49 | #include "qemu/option.h" | |
50 | #include "qemu/bitmap.h" | |
51 | #include "qemu/seqlock.h" | |
52 | #include "tcg.h" | |
53 | #include "hw/nmi.h" | |
54 | #include "sysemu/replay.h" | |
55 | #include "hw/boards.h" | |
56 | ||
57 | #ifdef CONFIG_LINUX | |
58 | ||
59 | #include <sys/prctl.h> | |
60 | ||
61 | #ifndef PR_MCE_KILL | |
62 | #define PR_MCE_KILL 33 | |
63 | #endif | |
64 | ||
65 | #ifndef PR_MCE_KILL_SET | |
66 | #define PR_MCE_KILL_SET 1 | |
67 | #endif | |
68 | ||
69 | #ifndef PR_MCE_KILL_EARLY | |
70 | #define PR_MCE_KILL_EARLY 1 | |
71 | #endif | |
72 | ||
73 | #endif /* CONFIG_LINUX */ | |
74 | ||
75 | int64_t max_delay; | |
76 | int64_t max_advance; | |
77 | ||
78 | /* vcpu throttling controls */ | |
79 | static QEMUTimer *throttle_timer; | |
80 | static unsigned int throttle_percentage; | |
81 | ||
82 | #define CPU_THROTTLE_PCT_MIN 1 | |
83 | #define CPU_THROTTLE_PCT_MAX 99 | |
84 | #define CPU_THROTTLE_TIMESLICE_NS 10000000 | |
85 | ||
86 | bool cpu_is_stopped(CPUState *cpu) | |
87 | { | |
88 | return cpu->stopped || !runstate_is_running(); | |
89 | } | |
90 | ||
91 | static bool cpu_thread_is_idle(CPUState *cpu) | |
92 | { | |
93 | if (cpu->stop || cpu->queued_work_first) { | |
94 | return false; | |
95 | } | |
96 | if (cpu_is_stopped(cpu)) { | |
97 | return true; | |
98 | } | |
99 | if (!cpu->halted || cpu_has_work(cpu) || | |
100 | kvm_halt_in_kernel()) { | |
101 | return false; | |
102 | } | |
103 | return true; | |
104 | } | |
105 | ||
106 | static bool all_cpu_threads_idle(void) | |
107 | { | |
108 | CPUState *cpu; | |
109 | ||
110 | CPU_FOREACH(cpu) { | |
111 | if (!cpu_thread_is_idle(cpu)) { | |
112 | return false; | |
113 | } | |
114 | } | |
115 | return true; | |
116 | } | |
117 | ||
118 | /***********************************************************/ | |
119 | /* guest cycle counter */ | |
120 | ||
121 | /* Protected by TimersState seqlock */ | |
122 | ||
123 | static bool icount_sleep = true; | |
124 | /* Arbitrarily pick 1MIPS as the minimum allowable speed. */ | |
125 | #define MAX_ICOUNT_SHIFT 10 | |
126 | ||
127 | typedef struct TimersState { | |
128 | /* Protected by BQL. */ | |
129 | int64_t cpu_ticks_prev; | |
130 | int64_t cpu_ticks_offset; | |
131 | ||
132 | /* Protect fields that can be respectively read outside the | |
133 | * BQL, and written from multiple threads. | |
134 | */ | |
135 | QemuSeqLock vm_clock_seqlock; | |
136 | QemuSpin vm_clock_lock; | |
137 | ||
138 | int16_t cpu_ticks_enabled; | |
139 | ||
140 | /* Conversion factor from emulated instructions to virtual clock ticks. */ | |
141 | int16_t icount_time_shift; | |
142 | ||
143 | /* Compensate for varying guest execution speed. */ | |
144 | int64_t qemu_icount_bias; | |
145 | ||
146 | int64_t vm_clock_warp_start; | |
147 | int64_t cpu_clock_offset; | |
148 | ||
149 | /* Only written by TCG thread */ | |
150 | int64_t qemu_icount; | |
151 | ||
152 | /* for adjusting icount */ | |
153 | QEMUTimer *icount_rt_timer; | |
154 | QEMUTimer *icount_vm_timer; | |
155 | QEMUTimer *icount_warp_timer; | |
156 | } TimersState; | |
157 | ||
158 | static TimersState timers_state; | |
159 | bool mttcg_enabled; | |
160 | ||
161 | /* | |
162 | * We default to false if we know other options have been enabled | |
163 | * which are currently incompatible with MTTCG. Otherwise when each | |
164 | * guest (target) has been updated to support: | |
165 | * - atomic instructions | |
166 | * - memory ordering primitives (barriers) | |
167 | * they can set the appropriate CONFIG flags in ${target}-softmmu.mak | |
168 | * | |
169 | * Once a guest architecture has been converted to the new primitives | |
170 | * there are two remaining limitations to check. | |
171 | * | |
172 | * - The guest can't be oversized (e.g. 64 bit guest on 32 bit host) | |
173 | * - The host must have a stronger memory order than the guest | |
174 | * | |
175 | * It may be possible in future to support strong guests on weak hosts | |
176 | * but that will require tagging all load/stores in a guest with their | |
177 | * implicit memory order requirements which would likely slow things | |
178 | * down a lot. | |
179 | */ | |
180 | ||
181 | static bool check_tcg_memory_orders_compatible(void) | |
182 | { | |
183 | #if defined(TCG_GUEST_DEFAULT_MO) && defined(TCG_TARGET_DEFAULT_MO) | |
184 | return (TCG_GUEST_DEFAULT_MO & ~TCG_TARGET_DEFAULT_MO) == 0; | |
185 | #else | |
186 | return false; | |
187 | #endif | |
188 | } | |
189 | ||
190 | static bool default_mttcg_enabled(void) | |
191 | { | |
192 | if (use_icount || TCG_OVERSIZED_GUEST) { | |
193 | return false; | |
194 | } else { | |
195 | #ifdef TARGET_SUPPORTS_MTTCG | |
196 | return check_tcg_memory_orders_compatible(); | |
197 | #else | |
198 | return false; | |
199 | #endif | |
200 | } | |
201 | } | |
202 | ||
203 | void qemu_tcg_configure(QemuOpts *opts, Error **errp) | |
204 | { | |
205 | const char *t = qemu_opt_get(opts, "thread"); | |
206 | if (t) { | |
207 | if (strcmp(t, "multi") == 0) { | |
208 | if (TCG_OVERSIZED_GUEST) { | |
209 | error_setg(errp, "No MTTCG when guest word size > hosts"); | |
210 | } else if (use_icount) { | |
211 | error_setg(errp, "No MTTCG when icount is enabled"); | |
212 | } else { | |
213 | #ifndef TARGET_SUPPORTS_MTTCG | |
214 | warn_report("Guest not yet converted to MTTCG - " | |
215 | "you may get unexpected results"); | |
216 | #endif | |
217 | if (!check_tcg_memory_orders_compatible()) { | |
218 | warn_report("Guest expects a stronger memory ordering " | |
219 | "than the host provides"); | |
220 | error_printf("This may cause strange/hard to debug errors\n"); | |
221 | } | |
222 | mttcg_enabled = true; | |
223 | } | |
224 | } else if (strcmp(t, "single") == 0) { | |
225 | mttcg_enabled = false; | |
226 | } else { | |
227 | error_setg(errp, "Invalid 'thread' setting %s", t); | |
228 | } | |
229 | } else { | |
230 | mttcg_enabled = default_mttcg_enabled(); | |
231 | } | |
232 | } | |
233 | ||
234 | /* The current number of executed instructions is based on what we | |
235 | * originally budgeted minus the current state of the decrementing | |
236 | * icount counters in extra/u16.low. | |
237 | */ | |
238 | static int64_t cpu_get_icount_executed(CPUState *cpu) | |
239 | { | |
240 | return cpu->icount_budget - (cpu->icount_decr.u16.low + cpu->icount_extra); | |
241 | } | |
242 | ||
243 | /* | |
244 | * Update the global shared timer_state.qemu_icount to take into | |
245 | * account executed instructions. This is done by the TCG vCPU | |
246 | * thread so the main-loop can see time has moved forward. | |
247 | */ | |
248 | static void cpu_update_icount_locked(CPUState *cpu) | |
249 | { | |
250 | int64_t executed = cpu_get_icount_executed(cpu); | |
251 | cpu->icount_budget -= executed; | |
252 | ||
253 | atomic_set_i64(&timers_state.qemu_icount, | |
254 | timers_state.qemu_icount + executed); | |
255 | } | |
256 | ||
257 | /* | |
258 | * Update the global shared timer_state.qemu_icount to take into | |
259 | * account executed instructions. This is done by the TCG vCPU | |
260 | * thread so the main-loop can see time has moved forward. | |
261 | */ | |
262 | void cpu_update_icount(CPUState *cpu) | |
263 | { | |
264 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
265 | &timers_state.vm_clock_lock); | |
266 | cpu_update_icount_locked(cpu); | |
267 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
268 | &timers_state.vm_clock_lock); | |
269 | } | |
270 | ||
271 | static int64_t cpu_get_icount_raw_locked(void) | |
272 | { | |
273 | CPUState *cpu = current_cpu; | |
274 | ||
275 | if (cpu && cpu->running) { | |
276 | if (!cpu->can_do_io) { | |
277 | error_report("Bad icount read"); | |
278 | exit(1); | |
279 | } | |
280 | /* Take into account what has run */ | |
281 | cpu_update_icount_locked(cpu); | |
282 | } | |
283 | /* The read is protected by the seqlock, but needs atomic64 to avoid UB */ | |
284 | return atomic_read_i64(&timers_state.qemu_icount); | |
285 | } | |
286 | ||
287 | static int64_t cpu_get_icount_locked(void) | |
288 | { | |
289 | int64_t icount = cpu_get_icount_raw_locked(); | |
290 | return atomic_read_i64(&timers_state.qemu_icount_bias) + | |
291 | cpu_icount_to_ns(icount); | |
292 | } | |
293 | ||
294 | int64_t cpu_get_icount_raw(void) | |
295 | { | |
296 | int64_t icount; | |
297 | unsigned start; | |
298 | ||
299 | do { | |
300 | start = seqlock_read_begin(&timers_state.vm_clock_seqlock); | |
301 | icount = cpu_get_icount_raw_locked(); | |
302 | } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start)); | |
303 | ||
304 | return icount; | |
305 | } | |
306 | ||
307 | /* Return the virtual CPU time, based on the instruction counter. */ | |
308 | int64_t cpu_get_icount(void) | |
309 | { | |
310 | int64_t icount; | |
311 | unsigned start; | |
312 | ||
313 | do { | |
314 | start = seqlock_read_begin(&timers_state.vm_clock_seqlock); | |
315 | icount = cpu_get_icount_locked(); | |
316 | } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start)); | |
317 | ||
318 | return icount; | |
319 | } | |
320 | ||
321 | int64_t cpu_icount_to_ns(int64_t icount) | |
322 | { | |
323 | return icount << atomic_read(&timers_state.icount_time_shift); | |
324 | } | |
325 | ||
326 | static int64_t cpu_get_ticks_locked(void) | |
327 | { | |
328 | int64_t ticks = timers_state.cpu_ticks_offset; | |
329 | if (timers_state.cpu_ticks_enabled) { | |
330 | ticks += cpu_get_host_ticks(); | |
331 | } | |
332 | ||
333 | if (timers_state.cpu_ticks_prev > ticks) { | |
334 | /* Non increasing ticks may happen if the host uses software suspend. */ | |
335 | timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks; | |
336 | ticks = timers_state.cpu_ticks_prev; | |
337 | } | |
338 | ||
339 | timers_state.cpu_ticks_prev = ticks; | |
340 | return ticks; | |
341 | } | |
342 | ||
343 | /* return the time elapsed in VM between vm_start and vm_stop. Unless | |
344 | * icount is active, cpu_get_ticks() uses units of the host CPU cycle | |
345 | * counter. | |
346 | */ | |
347 | int64_t cpu_get_ticks(void) | |
348 | { | |
349 | int64_t ticks; | |
350 | ||
351 | if (use_icount) { | |
352 | return cpu_get_icount(); | |
353 | } | |
354 | ||
355 | qemu_spin_lock(&timers_state.vm_clock_lock); | |
356 | ticks = cpu_get_ticks_locked(); | |
357 | qemu_spin_unlock(&timers_state.vm_clock_lock); | |
358 | return ticks; | |
359 | } | |
360 | ||
361 | static int64_t cpu_get_clock_locked(void) | |
362 | { | |
363 | int64_t time; | |
364 | ||
365 | time = timers_state.cpu_clock_offset; | |
366 | if (timers_state.cpu_ticks_enabled) { | |
367 | time += get_clock(); | |
368 | } | |
369 | ||
370 | return time; | |
371 | } | |
372 | ||
373 | /* Return the monotonic time elapsed in VM, i.e., | |
374 | * the time between vm_start and vm_stop | |
375 | */ | |
376 | int64_t cpu_get_clock(void) | |
377 | { | |
378 | int64_t ti; | |
379 | unsigned start; | |
380 | ||
381 | do { | |
382 | start = seqlock_read_begin(&timers_state.vm_clock_seqlock); | |
383 | ti = cpu_get_clock_locked(); | |
384 | } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start)); | |
385 | ||
386 | return ti; | |
387 | } | |
388 | ||
389 | /* enable cpu_get_ticks() | |
390 | * Caller must hold BQL which serves as mutex for vm_clock_seqlock. | |
391 | */ | |
392 | void cpu_enable_ticks(void) | |
393 | { | |
394 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
395 | &timers_state.vm_clock_lock); | |
396 | if (!timers_state.cpu_ticks_enabled) { | |
397 | timers_state.cpu_ticks_offset -= cpu_get_host_ticks(); | |
398 | timers_state.cpu_clock_offset -= get_clock(); | |
399 | timers_state.cpu_ticks_enabled = 1; | |
400 | } | |
401 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
402 | &timers_state.vm_clock_lock); | |
403 | } | |
404 | ||
405 | /* disable cpu_get_ticks() : the clock is stopped. You must not call | |
406 | * cpu_get_ticks() after that. | |
407 | * Caller must hold BQL which serves as mutex for vm_clock_seqlock. | |
408 | */ | |
409 | void cpu_disable_ticks(void) | |
410 | { | |
411 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
412 | &timers_state.vm_clock_lock); | |
413 | if (timers_state.cpu_ticks_enabled) { | |
414 | timers_state.cpu_ticks_offset += cpu_get_host_ticks(); | |
415 | timers_state.cpu_clock_offset = cpu_get_clock_locked(); | |
416 | timers_state.cpu_ticks_enabled = 0; | |
417 | } | |
418 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
419 | &timers_state.vm_clock_lock); | |
420 | } | |
421 | ||
422 | /* Correlation between real and virtual time is always going to be | |
423 | fairly approximate, so ignore small variation. | |
424 | When the guest is idle real and virtual time will be aligned in | |
425 | the IO wait loop. */ | |
426 | #define ICOUNT_WOBBLE (NANOSECONDS_PER_SECOND / 10) | |
427 | ||
428 | static void icount_adjust(void) | |
429 | { | |
430 | int64_t cur_time; | |
431 | int64_t cur_icount; | |
432 | int64_t delta; | |
433 | ||
434 | /* Protected by TimersState mutex. */ | |
435 | static int64_t last_delta; | |
436 | ||
437 | /* If the VM is not running, then do nothing. */ | |
438 | if (!runstate_is_running()) { | |
439 | return; | |
440 | } | |
441 | ||
442 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
443 | &timers_state.vm_clock_lock); | |
444 | cur_time = cpu_get_clock_locked(); | |
445 | cur_icount = cpu_get_icount_locked(); | |
446 | ||
447 | delta = cur_icount - cur_time; | |
448 | /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */ | |
449 | if (delta > 0 | |
450 | && last_delta + ICOUNT_WOBBLE < delta * 2 | |
451 | && timers_state.icount_time_shift > 0) { | |
452 | /* The guest is getting too far ahead. Slow time down. */ | |
453 | atomic_set(&timers_state.icount_time_shift, | |
454 | timers_state.icount_time_shift - 1); | |
455 | } | |
456 | if (delta < 0 | |
457 | && last_delta - ICOUNT_WOBBLE > delta * 2 | |
458 | && timers_state.icount_time_shift < MAX_ICOUNT_SHIFT) { | |
459 | /* The guest is getting too far behind. Speed time up. */ | |
460 | atomic_set(&timers_state.icount_time_shift, | |
461 | timers_state.icount_time_shift + 1); | |
462 | } | |
463 | last_delta = delta; | |
464 | atomic_set_i64(&timers_state.qemu_icount_bias, | |
465 | cur_icount - (timers_state.qemu_icount | |
466 | << timers_state.icount_time_shift)); | |
467 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
468 | &timers_state.vm_clock_lock); | |
469 | } | |
470 | ||
471 | static void icount_adjust_rt(void *opaque) | |
472 | { | |
473 | timer_mod(timers_state.icount_rt_timer, | |
474 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000); | |
475 | icount_adjust(); | |
476 | } | |
477 | ||
478 | static void icount_adjust_vm(void *opaque) | |
479 | { | |
480 | timer_mod(timers_state.icount_vm_timer, | |
481 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + | |
482 | NANOSECONDS_PER_SECOND / 10); | |
483 | icount_adjust(); | |
484 | } | |
485 | ||
486 | static int64_t qemu_icount_round(int64_t count) | |
487 | { | |
488 | int shift = atomic_read(&timers_state.icount_time_shift); | |
489 | return (count + (1 << shift) - 1) >> shift; | |
490 | } | |
491 | ||
492 | static void icount_warp_rt(void) | |
493 | { | |
494 | unsigned seq; | |
495 | int64_t warp_start; | |
496 | ||
497 | /* The icount_warp_timer is rescheduled soon after vm_clock_warp_start | |
498 | * changes from -1 to another value, so the race here is okay. | |
499 | */ | |
500 | do { | |
501 | seq = seqlock_read_begin(&timers_state.vm_clock_seqlock); | |
502 | warp_start = timers_state.vm_clock_warp_start; | |
503 | } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, seq)); | |
504 | ||
505 | if (warp_start == -1) { | |
506 | return; | |
507 | } | |
508 | ||
509 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
510 | &timers_state.vm_clock_lock); | |
511 | if (runstate_is_running()) { | |
512 | int64_t clock = REPLAY_CLOCK_LOCKED(REPLAY_CLOCK_VIRTUAL_RT, | |
513 | cpu_get_clock_locked()); | |
514 | int64_t warp_delta; | |
515 | ||
516 | warp_delta = clock - timers_state.vm_clock_warp_start; | |
517 | if (use_icount == 2) { | |
518 | /* | |
519 | * In adaptive mode, do not let QEMU_CLOCK_VIRTUAL run too | |
520 | * far ahead of real time. | |
521 | */ | |
522 | int64_t cur_icount = cpu_get_icount_locked(); | |
523 | int64_t delta = clock - cur_icount; | |
524 | warp_delta = MIN(warp_delta, delta); | |
525 | } | |
526 | atomic_set_i64(&timers_state.qemu_icount_bias, | |
527 | timers_state.qemu_icount_bias + warp_delta); | |
528 | } | |
529 | timers_state.vm_clock_warp_start = -1; | |
530 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
531 | &timers_state.vm_clock_lock); | |
532 | ||
533 | if (qemu_clock_expired(QEMU_CLOCK_VIRTUAL)) { | |
534 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
535 | } | |
536 | } | |
537 | ||
538 | static void icount_timer_cb(void *opaque) | |
539 | { | |
540 | /* No need for a checkpoint because the timer already synchronizes | |
541 | * with CHECKPOINT_CLOCK_VIRTUAL_RT. | |
542 | */ | |
543 | icount_warp_rt(); | |
544 | } | |
545 | ||
546 | void qtest_clock_warp(int64_t dest) | |
547 | { | |
548 | int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
549 | AioContext *aio_context; | |
550 | assert(qtest_enabled()); | |
551 | aio_context = qemu_get_aio_context(); | |
552 | while (clock < dest) { | |
553 | int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); | |
554 | int64_t warp = qemu_soonest_timeout(dest - clock, deadline); | |
555 | ||
556 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
557 | &timers_state.vm_clock_lock); | |
558 | atomic_set_i64(&timers_state.qemu_icount_bias, | |
559 | timers_state.qemu_icount_bias + warp); | |
560 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
561 | &timers_state.vm_clock_lock); | |
562 | ||
563 | qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); | |
564 | timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); | |
565 | clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
566 | } | |
567 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
568 | } | |
569 | ||
570 | void qemu_start_warp_timer(void) | |
571 | { | |
572 | int64_t clock; | |
573 | int64_t deadline; | |
574 | ||
575 | if (!use_icount) { | |
576 | return; | |
577 | } | |
578 | ||
579 | /* Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers | |
580 | * do not fire, so computing the deadline does not make sense. | |
581 | */ | |
582 | if (!runstate_is_running()) { | |
583 | return; | |
584 | } | |
585 | ||
586 | if (replay_mode != REPLAY_MODE_PLAY) { | |
587 | if (!all_cpu_threads_idle()) { | |
588 | return; | |
589 | } | |
590 | ||
591 | if (qtest_enabled()) { | |
592 | /* When testing, qtest commands advance icount. */ | |
593 | return; | |
594 | } | |
595 | ||
596 | replay_checkpoint(CHECKPOINT_CLOCK_WARP_START); | |
597 | } else { | |
598 | /* warp clock deterministically in record/replay mode */ | |
599 | if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_START)) { | |
600 | /* vCPU is sleeping and warp can't be started. | |
601 | It is probably a race condition: notification sent | |
602 | to vCPU was processed in advance and vCPU went to sleep. | |
603 | Therefore we have to wake it up for doing someting. */ | |
604 | if (replay_has_checkpoint()) { | |
605 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
606 | } | |
607 | return; | |
608 | } | |
609 | } | |
610 | ||
611 | /* We want to use the earliest deadline from ALL vm_clocks */ | |
612 | clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT); | |
613 | deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); | |
614 | if (deadline < 0) { | |
615 | static bool notified; | |
616 | if (!icount_sleep && !notified) { | |
617 | warn_report("icount sleep disabled and no active timers"); | |
618 | notified = true; | |
619 | } | |
620 | return; | |
621 | } | |
622 | ||
623 | if (deadline > 0) { | |
624 | /* | |
625 | * Ensure QEMU_CLOCK_VIRTUAL proceeds even when the virtual CPU goes to | |
626 | * sleep. Otherwise, the CPU might be waiting for a future timer | |
627 | * interrupt to wake it up, but the interrupt never comes because | |
628 | * the vCPU isn't running any insns and thus doesn't advance the | |
629 | * QEMU_CLOCK_VIRTUAL. | |
630 | */ | |
631 | if (!icount_sleep) { | |
632 | /* | |
633 | * We never let VCPUs sleep in no sleep icount mode. | |
634 | * If there is a pending QEMU_CLOCK_VIRTUAL timer we just advance | |
635 | * to the next QEMU_CLOCK_VIRTUAL event and notify it. | |
636 | * It is useful when we want a deterministic execution time, | |
637 | * isolated from host latencies. | |
638 | */ | |
639 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
640 | &timers_state.vm_clock_lock); | |
641 | atomic_set_i64(&timers_state.qemu_icount_bias, | |
642 | timers_state.qemu_icount_bias + deadline); | |
643 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
644 | &timers_state.vm_clock_lock); | |
645 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
646 | } else { | |
647 | /* | |
648 | * We do stop VCPUs and only advance QEMU_CLOCK_VIRTUAL after some | |
649 | * "real" time, (related to the time left until the next event) has | |
650 | * passed. The QEMU_CLOCK_VIRTUAL_RT clock will do this. | |
651 | * This avoids that the warps are visible externally; for example, | |
652 | * you will not be sending network packets continuously instead of | |
653 | * every 100ms. | |
654 | */ | |
655 | seqlock_write_lock(&timers_state.vm_clock_seqlock, | |
656 | &timers_state.vm_clock_lock); | |
657 | if (timers_state.vm_clock_warp_start == -1 | |
658 | || timers_state.vm_clock_warp_start > clock) { | |
659 | timers_state.vm_clock_warp_start = clock; | |
660 | } | |
661 | seqlock_write_unlock(&timers_state.vm_clock_seqlock, | |
662 | &timers_state.vm_clock_lock); | |
663 | timer_mod_anticipate(timers_state.icount_warp_timer, | |
664 | clock + deadline); | |
665 | } | |
666 | } else if (deadline == 0) { | |
667 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
668 | } | |
669 | } | |
670 | ||
671 | static void qemu_account_warp_timer(void) | |
672 | { | |
673 | if (!use_icount || !icount_sleep) { | |
674 | return; | |
675 | } | |
676 | ||
677 | /* Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers | |
678 | * do not fire, so computing the deadline does not make sense. | |
679 | */ | |
680 | if (!runstate_is_running()) { | |
681 | return; | |
682 | } | |
683 | ||
684 | /* warp clock deterministically in record/replay mode */ | |
685 | if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_ACCOUNT)) { | |
686 | return; | |
687 | } | |
688 | ||
689 | timer_del(timers_state.icount_warp_timer); | |
690 | icount_warp_rt(); | |
691 | } | |
692 | ||
693 | static bool icount_state_needed(void *opaque) | |
694 | { | |
695 | return use_icount; | |
696 | } | |
697 | ||
698 | static bool warp_timer_state_needed(void *opaque) | |
699 | { | |
700 | TimersState *s = opaque; | |
701 | return s->icount_warp_timer != NULL; | |
702 | } | |
703 | ||
704 | static bool adjust_timers_state_needed(void *opaque) | |
705 | { | |
706 | TimersState *s = opaque; | |
707 | return s->icount_rt_timer != NULL; | |
708 | } | |
709 | ||
710 | /* | |
711 | * Subsection for warp timer migration is optional, because may not be created | |
712 | */ | |
713 | static const VMStateDescription icount_vmstate_warp_timer = { | |
714 | .name = "timer/icount/warp_timer", | |
715 | .version_id = 1, | |
716 | .minimum_version_id = 1, | |
717 | .needed = warp_timer_state_needed, | |
718 | .fields = (VMStateField[]) { | |
719 | VMSTATE_INT64(vm_clock_warp_start, TimersState), | |
720 | VMSTATE_TIMER_PTR(icount_warp_timer, TimersState), | |
721 | VMSTATE_END_OF_LIST() | |
722 | } | |
723 | }; | |
724 | ||
725 | static const VMStateDescription icount_vmstate_adjust_timers = { | |
726 | .name = "timer/icount/timers", | |
727 | .version_id = 1, | |
728 | .minimum_version_id = 1, | |
729 | .needed = adjust_timers_state_needed, | |
730 | .fields = (VMStateField[]) { | |
731 | VMSTATE_TIMER_PTR(icount_rt_timer, TimersState), | |
732 | VMSTATE_TIMER_PTR(icount_vm_timer, TimersState), | |
733 | VMSTATE_END_OF_LIST() | |
734 | } | |
735 | }; | |
736 | ||
737 | /* | |
738 | * This is a subsection for icount migration. | |
739 | */ | |
740 | static const VMStateDescription icount_vmstate_timers = { | |
741 | .name = "timer/icount", | |
742 | .version_id = 1, | |
743 | .minimum_version_id = 1, | |
744 | .needed = icount_state_needed, | |
745 | .fields = (VMStateField[]) { | |
746 | VMSTATE_INT64(qemu_icount_bias, TimersState), | |
747 | VMSTATE_INT64(qemu_icount, TimersState), | |
748 | VMSTATE_END_OF_LIST() | |
749 | }, | |
750 | .subsections = (const VMStateDescription*[]) { | |
751 | &icount_vmstate_warp_timer, | |
752 | &icount_vmstate_adjust_timers, | |
753 | NULL | |
754 | } | |
755 | }; | |
756 | ||
757 | static const VMStateDescription vmstate_timers = { | |
758 | .name = "timer", | |
759 | .version_id = 2, | |
760 | .minimum_version_id = 1, | |
761 | .fields = (VMStateField[]) { | |
762 | VMSTATE_INT64(cpu_ticks_offset, TimersState), | |
763 | VMSTATE_UNUSED(8), | |
764 | VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2), | |
765 | VMSTATE_END_OF_LIST() | |
766 | }, | |
767 | .subsections = (const VMStateDescription*[]) { | |
768 | &icount_vmstate_timers, | |
769 | NULL | |
770 | } | |
771 | }; | |
772 | ||
773 | static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque) | |
774 | { | |
775 | double pct; | |
776 | double throttle_ratio; | |
777 | long sleeptime_ns; | |
778 | ||
779 | if (!cpu_throttle_get_percentage()) { | |
780 | return; | |
781 | } | |
782 | ||
783 | pct = (double)cpu_throttle_get_percentage()/100; | |
784 | throttle_ratio = pct / (1 - pct); | |
785 | sleeptime_ns = (long)(throttle_ratio * CPU_THROTTLE_TIMESLICE_NS); | |
786 | ||
787 | qemu_mutex_unlock_iothread(); | |
788 | g_usleep(sleeptime_ns / 1000); /* Convert ns to us for usleep call */ | |
789 | qemu_mutex_lock_iothread(); | |
790 | atomic_set(&cpu->throttle_thread_scheduled, 0); | |
791 | } | |
792 | ||
793 | static void cpu_throttle_timer_tick(void *opaque) | |
794 | { | |
795 | CPUState *cpu; | |
796 | double pct; | |
797 | ||
798 | /* Stop the timer if needed */ | |
799 | if (!cpu_throttle_get_percentage()) { | |
800 | return; | |
801 | } | |
802 | CPU_FOREACH(cpu) { | |
803 | if (!atomic_xchg(&cpu->throttle_thread_scheduled, 1)) { | |
804 | async_run_on_cpu(cpu, cpu_throttle_thread, | |
805 | RUN_ON_CPU_NULL); | |
806 | } | |
807 | } | |
808 | ||
809 | pct = (double)cpu_throttle_get_percentage()/100; | |
810 | timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) + | |
811 | CPU_THROTTLE_TIMESLICE_NS / (1-pct)); | |
812 | } | |
813 | ||
814 | void cpu_throttle_set(int new_throttle_pct) | |
815 | { | |
816 | /* Ensure throttle percentage is within valid range */ | |
817 | new_throttle_pct = MIN(new_throttle_pct, CPU_THROTTLE_PCT_MAX); | |
818 | new_throttle_pct = MAX(new_throttle_pct, CPU_THROTTLE_PCT_MIN); | |
819 | ||
820 | atomic_set(&throttle_percentage, new_throttle_pct); | |
821 | ||
822 | timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) + | |
823 | CPU_THROTTLE_TIMESLICE_NS); | |
824 | } | |
825 | ||
826 | void cpu_throttle_stop(void) | |
827 | { | |
828 | atomic_set(&throttle_percentage, 0); | |
829 | } | |
830 | ||
831 | bool cpu_throttle_active(void) | |
832 | { | |
833 | return (cpu_throttle_get_percentage() != 0); | |
834 | } | |
835 | ||
836 | int cpu_throttle_get_percentage(void) | |
837 | { | |
838 | return atomic_read(&throttle_percentage); | |
839 | } | |
840 | ||
841 | void cpu_ticks_init(void) | |
842 | { | |
843 | seqlock_init(&timers_state.vm_clock_seqlock); | |
844 | qemu_spin_init(&timers_state.vm_clock_lock); | |
845 | vmstate_register(NULL, 0, &vmstate_timers, &timers_state); | |
846 | throttle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT, | |
847 | cpu_throttle_timer_tick, NULL); | |
848 | } | |
849 | ||
850 | void configure_icount(QemuOpts *opts, Error **errp) | |
851 | { | |
852 | const char *option; | |
853 | char *rem_str = NULL; | |
854 | ||
855 | option = qemu_opt_get(opts, "shift"); | |
856 | if (!option) { | |
857 | if (qemu_opt_get(opts, "align") != NULL) { | |
858 | error_setg(errp, "Please specify shift option when using align"); | |
859 | } | |
860 | return; | |
861 | } | |
862 | ||
863 | icount_sleep = qemu_opt_get_bool(opts, "sleep", true); | |
864 | if (icount_sleep) { | |
865 | timers_state.icount_warp_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT, | |
866 | icount_timer_cb, NULL); | |
867 | } | |
868 | ||
869 | icount_align_option = qemu_opt_get_bool(opts, "align", false); | |
870 | ||
871 | if (icount_align_option && !icount_sleep) { | |
872 | error_setg(errp, "align=on and sleep=off are incompatible"); | |
873 | } | |
874 | if (strcmp(option, "auto") != 0) { | |
875 | errno = 0; | |
876 | timers_state.icount_time_shift = strtol(option, &rem_str, 0); | |
877 | if (errno != 0 || *rem_str != '\0' || !strlen(option)) { | |
878 | error_setg(errp, "icount: Invalid shift value"); | |
879 | } | |
880 | use_icount = 1; | |
881 | return; | |
882 | } else if (icount_align_option) { | |
883 | error_setg(errp, "shift=auto and align=on are incompatible"); | |
884 | } else if (!icount_sleep) { | |
885 | error_setg(errp, "shift=auto and sleep=off are incompatible"); | |
886 | } | |
887 | ||
888 | use_icount = 2; | |
889 | ||
890 | /* 125MIPS seems a reasonable initial guess at the guest speed. | |
891 | It will be corrected fairly quickly anyway. */ | |
892 | timers_state.icount_time_shift = 3; | |
893 | ||
894 | /* Have both realtime and virtual time triggers for speed adjustment. | |
895 | The realtime trigger catches emulated time passing too slowly, | |
896 | the virtual time trigger catches emulated time passing too fast. | |
897 | Realtime triggers occur even when idle, so use them less frequently | |
898 | than VM triggers. */ | |
899 | timers_state.vm_clock_warp_start = -1; | |
900 | timers_state.icount_rt_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL_RT, | |
901 | icount_adjust_rt, NULL); | |
902 | timer_mod(timers_state.icount_rt_timer, | |
903 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000); | |
904 | timers_state.icount_vm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, | |
905 | icount_adjust_vm, NULL); | |
906 | timer_mod(timers_state.icount_vm_timer, | |
907 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + | |
908 | NANOSECONDS_PER_SECOND / 10); | |
909 | } | |
910 | ||
911 | /***********************************************************/ | |
912 | /* TCG vCPU kick timer | |
913 | * | |
914 | * The kick timer is responsible for moving single threaded vCPU | |
915 | * emulation on to the next vCPU. If more than one vCPU is running a | |
916 | * timer event with force a cpu->exit so the next vCPU can get | |
917 | * scheduled. | |
918 | * | |
919 | * The timer is removed if all vCPUs are idle and restarted again once | |
920 | * idleness is complete. | |
921 | */ | |
922 | ||
923 | static QEMUTimer *tcg_kick_vcpu_timer; | |
924 | static CPUState *tcg_current_rr_cpu; | |
925 | ||
926 | #define TCG_KICK_PERIOD (NANOSECONDS_PER_SECOND / 10) | |
927 | ||
928 | static inline int64_t qemu_tcg_next_kick(void) | |
929 | { | |
930 | return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + TCG_KICK_PERIOD; | |
931 | } | |
932 | ||
933 | /* Kick the currently round-robin scheduled vCPU */ | |
934 | static void qemu_cpu_kick_rr_cpu(void) | |
935 | { | |
936 | CPUState *cpu; | |
937 | do { | |
938 | cpu = atomic_mb_read(&tcg_current_rr_cpu); | |
939 | if (cpu) { | |
940 | cpu_exit(cpu); | |
941 | } | |
942 | } while (cpu != atomic_mb_read(&tcg_current_rr_cpu)); | |
943 | } | |
944 | ||
945 | static void do_nothing(CPUState *cpu, run_on_cpu_data unused) | |
946 | { | |
947 | } | |
948 | ||
949 | void qemu_timer_notify_cb(void *opaque, QEMUClockType type) | |
950 | { | |
951 | if (!use_icount || type != QEMU_CLOCK_VIRTUAL) { | |
952 | qemu_notify_event(); | |
953 | return; | |
954 | } | |
955 | ||
956 | if (qemu_in_vcpu_thread()) { | |
957 | /* A CPU is currently running; kick it back out to the | |
958 | * tcg_cpu_exec() loop so it will recalculate its | |
959 | * icount deadline immediately. | |
960 | */ | |
961 | qemu_cpu_kick(current_cpu); | |
962 | } else if (first_cpu) { | |
963 | /* qemu_cpu_kick is not enough to kick a halted CPU out of | |
964 | * qemu_tcg_wait_io_event. async_run_on_cpu, instead, | |
965 | * causes cpu_thread_is_idle to return false. This way, | |
966 | * handle_icount_deadline can run. | |
967 | * If we have no CPUs at all for some reason, we don't | |
968 | * need to do anything. | |
969 | */ | |
970 | async_run_on_cpu(first_cpu, do_nothing, RUN_ON_CPU_NULL); | |
971 | } | |
972 | } | |
973 | ||
974 | static void kick_tcg_thread(void *opaque) | |
975 | { | |
976 | timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick()); | |
977 | qemu_cpu_kick_rr_cpu(); | |
978 | } | |
979 | ||
980 | static void start_tcg_kick_timer(void) | |
981 | { | |
982 | assert(!mttcg_enabled); | |
983 | if (!tcg_kick_vcpu_timer && CPU_NEXT(first_cpu)) { | |
984 | tcg_kick_vcpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, | |
985 | kick_tcg_thread, NULL); | |
986 | } | |
987 | if (tcg_kick_vcpu_timer && !timer_pending(tcg_kick_vcpu_timer)) { | |
988 | timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick()); | |
989 | } | |
990 | } | |
991 | ||
992 | static void stop_tcg_kick_timer(void) | |
993 | { | |
994 | assert(!mttcg_enabled); | |
995 | if (tcg_kick_vcpu_timer && timer_pending(tcg_kick_vcpu_timer)) { | |
996 | timer_del(tcg_kick_vcpu_timer); | |
997 | } | |
998 | } | |
999 | ||
1000 | /***********************************************************/ | |
1001 | void hw_error(const char *fmt, ...) | |
1002 | { | |
1003 | va_list ap; | |
1004 | CPUState *cpu; | |
1005 | ||
1006 | va_start(ap, fmt); | |
1007 | fprintf(stderr, "qemu: hardware error: "); | |
1008 | vfprintf(stderr, fmt, ap); | |
1009 | fprintf(stderr, "\n"); | |
1010 | CPU_FOREACH(cpu) { | |
1011 | fprintf(stderr, "CPU #%d:\n", cpu->cpu_index); | |
1012 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU); | |
1013 | } | |
1014 | va_end(ap); | |
1015 | abort(); | |
1016 | } | |
1017 | ||
1018 | void cpu_synchronize_all_states(void) | |
1019 | { | |
1020 | CPUState *cpu; | |
1021 | ||
1022 | CPU_FOREACH(cpu) { | |
1023 | cpu_synchronize_state(cpu); | |
1024 | /* TODO: move to cpu_synchronize_state() */ | |
1025 | if (hvf_enabled()) { | |
1026 | hvf_cpu_synchronize_state(cpu); | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | void cpu_synchronize_all_post_reset(void) | |
1032 | { | |
1033 | CPUState *cpu; | |
1034 | ||
1035 | CPU_FOREACH(cpu) { | |
1036 | cpu_synchronize_post_reset(cpu); | |
1037 | /* TODO: move to cpu_synchronize_post_reset() */ | |
1038 | if (hvf_enabled()) { | |
1039 | hvf_cpu_synchronize_post_reset(cpu); | |
1040 | } | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | void cpu_synchronize_all_post_init(void) | |
1045 | { | |
1046 | CPUState *cpu; | |
1047 | ||
1048 | CPU_FOREACH(cpu) { | |
1049 | cpu_synchronize_post_init(cpu); | |
1050 | /* TODO: move to cpu_synchronize_post_init() */ | |
1051 | if (hvf_enabled()) { | |
1052 | hvf_cpu_synchronize_post_init(cpu); | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | void cpu_synchronize_all_pre_loadvm(void) | |
1058 | { | |
1059 | CPUState *cpu; | |
1060 | ||
1061 | CPU_FOREACH(cpu) { | |
1062 | cpu_synchronize_pre_loadvm(cpu); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static int do_vm_stop(RunState state, bool send_stop) | |
1067 | { | |
1068 | int ret = 0; | |
1069 | ||
1070 | if (runstate_is_running()) { | |
1071 | cpu_disable_ticks(); | |
1072 | pause_all_vcpus(); | |
1073 | runstate_set(state); | |
1074 | vm_state_notify(0, state); | |
1075 | if (send_stop) { | |
1076 | qapi_event_send_stop(); | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | bdrv_drain_all(); | |
1081 | replay_disable_events(); | |
1082 | ret = bdrv_flush_all(); | |
1083 | ||
1084 | return ret; | |
1085 | } | |
1086 | ||
1087 | /* Special vm_stop() variant for terminating the process. Historically clients | |
1088 | * did not expect a QMP STOP event and so we need to retain compatibility. | |
1089 | */ | |
1090 | int vm_shutdown(void) | |
1091 | { | |
1092 | return do_vm_stop(RUN_STATE_SHUTDOWN, false); | |
1093 | } | |
1094 | ||
1095 | static bool cpu_can_run(CPUState *cpu) | |
1096 | { | |
1097 | if (cpu->stop) { | |
1098 | return false; | |
1099 | } | |
1100 | if (cpu_is_stopped(cpu)) { | |
1101 | return false; | |
1102 | } | |
1103 | return true; | |
1104 | } | |
1105 | ||
1106 | static void cpu_handle_guest_debug(CPUState *cpu) | |
1107 | { | |
1108 | gdb_set_stop_cpu(cpu); | |
1109 | qemu_system_debug_request(); | |
1110 | cpu->stopped = true; | |
1111 | } | |
1112 | ||
1113 | #ifdef CONFIG_LINUX | |
1114 | static void sigbus_reraise(void) | |
1115 | { | |
1116 | sigset_t set; | |
1117 | struct sigaction action; | |
1118 | ||
1119 | memset(&action, 0, sizeof(action)); | |
1120 | action.sa_handler = SIG_DFL; | |
1121 | if (!sigaction(SIGBUS, &action, NULL)) { | |
1122 | raise(SIGBUS); | |
1123 | sigemptyset(&set); | |
1124 | sigaddset(&set, SIGBUS); | |
1125 | pthread_sigmask(SIG_UNBLOCK, &set, NULL); | |
1126 | } | |
1127 | perror("Failed to re-raise SIGBUS!\n"); | |
1128 | abort(); | |
1129 | } | |
1130 | ||
1131 | static void sigbus_handler(int n, siginfo_t *siginfo, void *ctx) | |
1132 | { | |
1133 | if (siginfo->si_code != BUS_MCEERR_AO && siginfo->si_code != BUS_MCEERR_AR) { | |
1134 | sigbus_reraise(); | |
1135 | } | |
1136 | ||
1137 | if (current_cpu) { | |
1138 | /* Called asynchronously in VCPU thread. */ | |
1139 | if (kvm_on_sigbus_vcpu(current_cpu, siginfo->si_code, siginfo->si_addr)) { | |
1140 | sigbus_reraise(); | |
1141 | } | |
1142 | } else { | |
1143 | /* Called synchronously (via signalfd) in main thread. */ | |
1144 | if (kvm_on_sigbus(siginfo->si_code, siginfo->si_addr)) { | |
1145 | sigbus_reraise(); | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | static void qemu_init_sigbus(void) | |
1151 | { | |
1152 | struct sigaction action; | |
1153 | ||
1154 | memset(&action, 0, sizeof(action)); | |
1155 | action.sa_flags = SA_SIGINFO; | |
1156 | action.sa_sigaction = sigbus_handler; | |
1157 | sigaction(SIGBUS, &action, NULL); | |
1158 | ||
1159 | prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0); | |
1160 | } | |
1161 | #else /* !CONFIG_LINUX */ | |
1162 | static void qemu_init_sigbus(void) | |
1163 | { | |
1164 | } | |
1165 | #endif /* !CONFIG_LINUX */ | |
1166 | ||
1167 | static QemuMutex qemu_global_mutex; | |
1168 | ||
1169 | static QemuThread io_thread; | |
1170 | ||
1171 | /* cpu creation */ | |
1172 | static QemuCond qemu_cpu_cond; | |
1173 | /* system init */ | |
1174 | static QemuCond qemu_pause_cond; | |
1175 | ||
1176 | void qemu_init_cpu_loop(void) | |
1177 | { | |
1178 | qemu_init_sigbus(); | |
1179 | qemu_cond_init(&qemu_cpu_cond); | |
1180 | qemu_cond_init(&qemu_pause_cond); | |
1181 | qemu_mutex_init(&qemu_global_mutex); | |
1182 | ||
1183 | qemu_thread_get_self(&io_thread); | |
1184 | } | |
1185 | ||
1186 | void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) | |
1187 | { | |
1188 | do_run_on_cpu(cpu, func, data, &qemu_global_mutex); | |
1189 | } | |
1190 | ||
1191 | static void qemu_kvm_destroy_vcpu(CPUState *cpu) | |
1192 | { | |
1193 | if (kvm_destroy_vcpu(cpu) < 0) { | |
1194 | error_report("kvm_destroy_vcpu failed"); | |
1195 | exit(EXIT_FAILURE); | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | static void qemu_tcg_destroy_vcpu(CPUState *cpu) | |
1200 | { | |
1201 | } | |
1202 | ||
1203 | static void qemu_cpu_stop(CPUState *cpu, bool exit) | |
1204 | { | |
1205 | g_assert(qemu_cpu_is_self(cpu)); | |
1206 | cpu->stop = false; | |
1207 | cpu->stopped = true; | |
1208 | if (exit) { | |
1209 | cpu_exit(cpu); | |
1210 | } | |
1211 | qemu_cond_broadcast(&qemu_pause_cond); | |
1212 | } | |
1213 | ||
1214 | static void qemu_wait_io_event_common(CPUState *cpu) | |
1215 | { | |
1216 | atomic_mb_set(&cpu->thread_kicked, false); | |
1217 | if (cpu->stop) { | |
1218 | qemu_cpu_stop(cpu, false); | |
1219 | } | |
1220 | process_queued_cpu_work(cpu); | |
1221 | } | |
1222 | ||
1223 | static void qemu_tcg_rr_wait_io_event(void) | |
1224 | { | |
1225 | CPUState *cpu; | |
1226 | ||
1227 | while (all_cpu_threads_idle()) { | |
1228 | stop_tcg_kick_timer(); | |
1229 | qemu_cond_wait(first_cpu->halt_cond, &qemu_global_mutex); | |
1230 | } | |
1231 | ||
1232 | start_tcg_kick_timer(); | |
1233 | ||
1234 | CPU_FOREACH(cpu) { | |
1235 | qemu_wait_io_event_common(cpu); | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | static void qemu_wait_io_event(CPUState *cpu) | |
1240 | { | |
1241 | while (cpu_thread_is_idle(cpu)) { | |
1242 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); | |
1243 | } | |
1244 | ||
1245 | #ifdef _WIN32 | |
1246 | /* Eat dummy APC queued by qemu_cpu_kick_thread. */ | |
1247 | if (!tcg_enabled()) { | |
1248 | SleepEx(0, TRUE); | |
1249 | } | |
1250 | #endif | |
1251 | qemu_wait_io_event_common(cpu); | |
1252 | } | |
1253 | ||
1254 | static void *qemu_kvm_cpu_thread_fn(void *arg) | |
1255 | { | |
1256 | CPUState *cpu = arg; | |
1257 | int r; | |
1258 | ||
1259 | rcu_register_thread(); | |
1260 | ||
1261 | qemu_mutex_lock_iothread(); | |
1262 | qemu_thread_get_self(cpu->thread); | |
1263 | cpu->thread_id = qemu_get_thread_id(); | |
1264 | cpu->can_do_io = 1; | |
1265 | current_cpu = cpu; | |
1266 | ||
1267 | r = kvm_init_vcpu(cpu); | |
1268 | if (r < 0) { | |
1269 | error_report("kvm_init_vcpu failed: %s", strerror(-r)); | |
1270 | exit(1); | |
1271 | } | |
1272 | ||
1273 | kvm_init_cpu_signals(cpu); | |
1274 | ||
1275 | /* signal CPU creation */ | |
1276 | cpu->created = true; | |
1277 | qemu_cond_signal(&qemu_cpu_cond); | |
1278 | ||
1279 | do { | |
1280 | if (cpu_can_run(cpu)) { | |
1281 | r = kvm_cpu_exec(cpu); | |
1282 | if (r == EXCP_DEBUG) { | |
1283 | cpu_handle_guest_debug(cpu); | |
1284 | } | |
1285 | } | |
1286 | qemu_wait_io_event(cpu); | |
1287 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
1288 | ||
1289 | qemu_kvm_destroy_vcpu(cpu); | |
1290 | cpu->created = false; | |
1291 | qemu_cond_signal(&qemu_cpu_cond); | |
1292 | qemu_mutex_unlock_iothread(); | |
1293 | rcu_unregister_thread(); | |
1294 | return NULL; | |
1295 | } | |
1296 | ||
1297 | static void *qemu_dummy_cpu_thread_fn(void *arg) | |
1298 | { | |
1299 | #ifdef _WIN32 | |
1300 | error_report("qtest is not supported under Windows"); | |
1301 | exit(1); | |
1302 | #else | |
1303 | CPUState *cpu = arg; | |
1304 | sigset_t waitset; | |
1305 | int r; | |
1306 | ||
1307 | rcu_register_thread(); | |
1308 | ||
1309 | qemu_mutex_lock_iothread(); | |
1310 | qemu_thread_get_self(cpu->thread); | |
1311 | cpu->thread_id = qemu_get_thread_id(); | |
1312 | cpu->can_do_io = 1; | |
1313 | current_cpu = cpu; | |
1314 | ||
1315 | sigemptyset(&waitset); | |
1316 | sigaddset(&waitset, SIG_IPI); | |
1317 | ||
1318 | /* signal CPU creation */ | |
1319 | cpu->created = true; | |
1320 | qemu_cond_signal(&qemu_cpu_cond); | |
1321 | ||
1322 | do { | |
1323 | qemu_mutex_unlock_iothread(); | |
1324 | do { | |
1325 | int sig; | |
1326 | r = sigwait(&waitset, &sig); | |
1327 | } while (r == -1 && (errno == EAGAIN || errno == EINTR)); | |
1328 | if (r == -1) { | |
1329 | perror("sigwait"); | |
1330 | exit(1); | |
1331 | } | |
1332 | qemu_mutex_lock_iothread(); | |
1333 | qemu_wait_io_event(cpu); | |
1334 | } while (!cpu->unplug); | |
1335 | ||
1336 | rcu_unregister_thread(); | |
1337 | return NULL; | |
1338 | #endif | |
1339 | } | |
1340 | ||
1341 | static int64_t tcg_get_icount_limit(void) | |
1342 | { | |
1343 | int64_t deadline; | |
1344 | ||
1345 | if (replay_mode != REPLAY_MODE_PLAY) { | |
1346 | deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); | |
1347 | ||
1348 | /* Maintain prior (possibly buggy) behaviour where if no deadline | |
1349 | * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than | |
1350 | * INT32_MAX nanoseconds ahead, we still use INT32_MAX | |
1351 | * nanoseconds. | |
1352 | */ | |
1353 | if ((deadline < 0) || (deadline > INT32_MAX)) { | |
1354 | deadline = INT32_MAX; | |
1355 | } | |
1356 | ||
1357 | return qemu_icount_round(deadline); | |
1358 | } else { | |
1359 | return replay_get_instructions(); | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | static void handle_icount_deadline(void) | |
1364 | { | |
1365 | assert(qemu_in_vcpu_thread()); | |
1366 | if (use_icount) { | |
1367 | int64_t deadline = | |
1368 | qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); | |
1369 | ||
1370 | if (deadline == 0) { | |
1371 | /* Wake up other AioContexts. */ | |
1372 | qemu_clock_notify(QEMU_CLOCK_VIRTUAL); | |
1373 | qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); | |
1374 | } | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | static void prepare_icount_for_run(CPUState *cpu) | |
1379 | { | |
1380 | if (use_icount) { | |
1381 | int insns_left; | |
1382 | ||
1383 | /* These should always be cleared by process_icount_data after | |
1384 | * each vCPU execution. However u16.high can be raised | |
1385 | * asynchronously by cpu_exit/cpu_interrupt/tcg_handle_interrupt | |
1386 | */ | |
1387 | g_assert(cpu->icount_decr.u16.low == 0); | |
1388 | g_assert(cpu->icount_extra == 0); | |
1389 | ||
1390 | cpu->icount_budget = tcg_get_icount_limit(); | |
1391 | insns_left = MIN(0xffff, cpu->icount_budget); | |
1392 | cpu->icount_decr.u16.low = insns_left; | |
1393 | cpu->icount_extra = cpu->icount_budget - insns_left; | |
1394 | ||
1395 | replay_mutex_lock(); | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | static void process_icount_data(CPUState *cpu) | |
1400 | { | |
1401 | if (use_icount) { | |
1402 | /* Account for executed instructions */ | |
1403 | cpu_update_icount(cpu); | |
1404 | ||
1405 | /* Reset the counters */ | |
1406 | cpu->icount_decr.u16.low = 0; | |
1407 | cpu->icount_extra = 0; | |
1408 | cpu->icount_budget = 0; | |
1409 | ||
1410 | replay_account_executed_instructions(); | |
1411 | ||
1412 | replay_mutex_unlock(); | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | ||
1417 | static int tcg_cpu_exec(CPUState *cpu) | |
1418 | { | |
1419 | int ret; | |
1420 | #ifdef CONFIG_PROFILER | |
1421 | int64_t ti; | |
1422 | #endif | |
1423 | ||
1424 | assert(tcg_enabled()); | |
1425 | #ifdef CONFIG_PROFILER | |
1426 | ti = profile_getclock(); | |
1427 | #endif | |
1428 | cpu_exec_start(cpu); | |
1429 | ret = cpu_exec(cpu); | |
1430 | cpu_exec_end(cpu); | |
1431 | #ifdef CONFIG_PROFILER | |
1432 | atomic_set(&tcg_ctx->prof.cpu_exec_time, | |
1433 | tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti); | |
1434 | #endif | |
1435 | return ret; | |
1436 | } | |
1437 | ||
1438 | /* Destroy any remaining vCPUs which have been unplugged and have | |
1439 | * finished running | |
1440 | */ | |
1441 | static void deal_with_unplugged_cpus(void) | |
1442 | { | |
1443 | CPUState *cpu; | |
1444 | ||
1445 | CPU_FOREACH(cpu) { | |
1446 | if (cpu->unplug && !cpu_can_run(cpu)) { | |
1447 | qemu_tcg_destroy_vcpu(cpu); | |
1448 | cpu->created = false; | |
1449 | qemu_cond_signal(&qemu_cpu_cond); | |
1450 | break; | |
1451 | } | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | /* Single-threaded TCG | |
1456 | * | |
1457 | * In the single-threaded case each vCPU is simulated in turn. If | |
1458 | * there is more than a single vCPU we create a simple timer to kick | |
1459 | * the vCPU and ensure we don't get stuck in a tight loop in one vCPU. | |
1460 | * This is done explicitly rather than relying on side-effects | |
1461 | * elsewhere. | |
1462 | */ | |
1463 | ||
1464 | static void *qemu_tcg_rr_cpu_thread_fn(void *arg) | |
1465 | { | |
1466 | CPUState *cpu = arg; | |
1467 | ||
1468 | assert(tcg_enabled()); | |
1469 | rcu_register_thread(); | |
1470 | tcg_register_thread(); | |
1471 | ||
1472 | qemu_mutex_lock_iothread(); | |
1473 | qemu_thread_get_self(cpu->thread); | |
1474 | ||
1475 | cpu->thread_id = qemu_get_thread_id(); | |
1476 | cpu->created = true; | |
1477 | cpu->can_do_io = 1; | |
1478 | qemu_cond_signal(&qemu_cpu_cond); | |
1479 | ||
1480 | /* wait for initial kick-off after machine start */ | |
1481 | while (first_cpu->stopped) { | |
1482 | qemu_cond_wait(first_cpu->halt_cond, &qemu_global_mutex); | |
1483 | ||
1484 | /* process any pending work */ | |
1485 | CPU_FOREACH(cpu) { | |
1486 | current_cpu = cpu; | |
1487 | qemu_wait_io_event_common(cpu); | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | start_tcg_kick_timer(); | |
1492 | ||
1493 | cpu = first_cpu; | |
1494 | ||
1495 | /* process any pending work */ | |
1496 | cpu->exit_request = 1; | |
1497 | ||
1498 | while (1) { | |
1499 | qemu_mutex_unlock_iothread(); | |
1500 | replay_mutex_lock(); | |
1501 | qemu_mutex_lock_iothread(); | |
1502 | /* Account partial waits to QEMU_CLOCK_VIRTUAL. */ | |
1503 | qemu_account_warp_timer(); | |
1504 | ||
1505 | /* Run the timers here. This is much more efficient than | |
1506 | * waking up the I/O thread and waiting for completion. | |
1507 | */ | |
1508 | handle_icount_deadline(); | |
1509 | ||
1510 | replay_mutex_unlock(); | |
1511 | ||
1512 | if (!cpu) { | |
1513 | cpu = first_cpu; | |
1514 | } | |
1515 | ||
1516 | while (cpu && !cpu->queued_work_first && !cpu->exit_request) { | |
1517 | ||
1518 | atomic_mb_set(&tcg_current_rr_cpu, cpu); | |
1519 | current_cpu = cpu; | |
1520 | ||
1521 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, | |
1522 | (cpu->singlestep_enabled & SSTEP_NOTIMER) == 0); | |
1523 | ||
1524 | if (cpu_can_run(cpu)) { | |
1525 | int r; | |
1526 | ||
1527 | qemu_mutex_unlock_iothread(); | |
1528 | prepare_icount_for_run(cpu); | |
1529 | ||
1530 | r = tcg_cpu_exec(cpu); | |
1531 | ||
1532 | process_icount_data(cpu); | |
1533 | qemu_mutex_lock_iothread(); | |
1534 | ||
1535 | if (r == EXCP_DEBUG) { | |
1536 | cpu_handle_guest_debug(cpu); | |
1537 | break; | |
1538 | } else if (r == EXCP_ATOMIC) { | |
1539 | qemu_mutex_unlock_iothread(); | |
1540 | cpu_exec_step_atomic(cpu); | |
1541 | qemu_mutex_lock_iothread(); | |
1542 | break; | |
1543 | } | |
1544 | } else if (cpu->stop) { | |
1545 | if (cpu->unplug) { | |
1546 | cpu = CPU_NEXT(cpu); | |
1547 | } | |
1548 | break; | |
1549 | } | |
1550 | ||
1551 | cpu = CPU_NEXT(cpu); | |
1552 | } /* while (cpu && !cpu->exit_request).. */ | |
1553 | ||
1554 | /* Does not need atomic_mb_set because a spurious wakeup is okay. */ | |
1555 | atomic_set(&tcg_current_rr_cpu, NULL); | |
1556 | ||
1557 | if (cpu && cpu->exit_request) { | |
1558 | atomic_mb_set(&cpu->exit_request, 0); | |
1559 | } | |
1560 | ||
1561 | if (use_icount && all_cpu_threads_idle()) { | |
1562 | /* | |
1563 | * When all cpus are sleeping (e.g in WFI), to avoid a deadlock | |
1564 | * in the main_loop, wake it up in order to start the warp timer. | |
1565 | */ | |
1566 | qemu_notify_event(); | |
1567 | } | |
1568 | ||
1569 | qemu_tcg_rr_wait_io_event(); | |
1570 | deal_with_unplugged_cpus(); | |
1571 | } | |
1572 | ||
1573 | rcu_unregister_thread(); | |
1574 | return NULL; | |
1575 | } | |
1576 | ||
1577 | static void *qemu_hax_cpu_thread_fn(void *arg) | |
1578 | { | |
1579 | CPUState *cpu = arg; | |
1580 | int r; | |
1581 | ||
1582 | rcu_register_thread(); | |
1583 | qemu_mutex_lock_iothread(); | |
1584 | qemu_thread_get_self(cpu->thread); | |
1585 | ||
1586 | cpu->thread_id = qemu_get_thread_id(); | |
1587 | cpu->created = true; | |
1588 | cpu->halted = 0; | |
1589 | current_cpu = cpu; | |
1590 | ||
1591 | hax_init_vcpu(cpu); | |
1592 | qemu_cond_signal(&qemu_cpu_cond); | |
1593 | ||
1594 | do { | |
1595 | if (cpu_can_run(cpu)) { | |
1596 | r = hax_smp_cpu_exec(cpu); | |
1597 | if (r == EXCP_DEBUG) { | |
1598 | cpu_handle_guest_debug(cpu); | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | qemu_wait_io_event(cpu); | |
1603 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
1604 | rcu_unregister_thread(); | |
1605 | return NULL; | |
1606 | } | |
1607 | ||
1608 | /* The HVF-specific vCPU thread function. This one should only run when the host | |
1609 | * CPU supports the VMX "unrestricted guest" feature. */ | |
1610 | static void *qemu_hvf_cpu_thread_fn(void *arg) | |
1611 | { | |
1612 | CPUState *cpu = arg; | |
1613 | ||
1614 | int r; | |
1615 | ||
1616 | assert(hvf_enabled()); | |
1617 | ||
1618 | rcu_register_thread(); | |
1619 | ||
1620 | qemu_mutex_lock_iothread(); | |
1621 | qemu_thread_get_self(cpu->thread); | |
1622 | ||
1623 | cpu->thread_id = qemu_get_thread_id(); | |
1624 | cpu->can_do_io = 1; | |
1625 | current_cpu = cpu; | |
1626 | ||
1627 | hvf_init_vcpu(cpu); | |
1628 | ||
1629 | /* signal CPU creation */ | |
1630 | cpu->created = true; | |
1631 | qemu_cond_signal(&qemu_cpu_cond); | |
1632 | ||
1633 | do { | |
1634 | if (cpu_can_run(cpu)) { | |
1635 | r = hvf_vcpu_exec(cpu); | |
1636 | if (r == EXCP_DEBUG) { | |
1637 | cpu_handle_guest_debug(cpu); | |
1638 | } | |
1639 | } | |
1640 | qemu_wait_io_event(cpu); | |
1641 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
1642 | ||
1643 | hvf_vcpu_destroy(cpu); | |
1644 | cpu->created = false; | |
1645 | qemu_cond_signal(&qemu_cpu_cond); | |
1646 | qemu_mutex_unlock_iothread(); | |
1647 | rcu_unregister_thread(); | |
1648 | return NULL; | |
1649 | } | |
1650 | ||
1651 | static void *qemu_whpx_cpu_thread_fn(void *arg) | |
1652 | { | |
1653 | CPUState *cpu = arg; | |
1654 | int r; | |
1655 | ||
1656 | rcu_register_thread(); | |
1657 | ||
1658 | qemu_mutex_lock_iothread(); | |
1659 | qemu_thread_get_self(cpu->thread); | |
1660 | cpu->thread_id = qemu_get_thread_id(); | |
1661 | current_cpu = cpu; | |
1662 | ||
1663 | r = whpx_init_vcpu(cpu); | |
1664 | if (r < 0) { | |
1665 | fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r)); | |
1666 | exit(1); | |
1667 | } | |
1668 | ||
1669 | /* signal CPU creation */ | |
1670 | cpu->created = true; | |
1671 | qemu_cond_signal(&qemu_cpu_cond); | |
1672 | ||
1673 | do { | |
1674 | if (cpu_can_run(cpu)) { | |
1675 | r = whpx_vcpu_exec(cpu); | |
1676 | if (r == EXCP_DEBUG) { | |
1677 | cpu_handle_guest_debug(cpu); | |
1678 | } | |
1679 | } | |
1680 | while (cpu_thread_is_idle(cpu)) { | |
1681 | qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); | |
1682 | } | |
1683 | qemu_wait_io_event_common(cpu); | |
1684 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
1685 | ||
1686 | whpx_destroy_vcpu(cpu); | |
1687 | cpu->created = false; | |
1688 | qemu_cond_signal(&qemu_cpu_cond); | |
1689 | qemu_mutex_unlock_iothread(); | |
1690 | rcu_unregister_thread(); | |
1691 | return NULL; | |
1692 | } | |
1693 | ||
1694 | #ifdef _WIN32 | |
1695 | static void CALLBACK dummy_apc_func(ULONG_PTR unused) | |
1696 | { | |
1697 | } | |
1698 | #endif | |
1699 | ||
1700 | /* Multi-threaded TCG | |
1701 | * | |
1702 | * In the multi-threaded case each vCPU has its own thread. The TLS | |
1703 | * variable current_cpu can be used deep in the code to find the | |
1704 | * current CPUState for a given thread. | |
1705 | */ | |
1706 | ||
1707 | static void *qemu_tcg_cpu_thread_fn(void *arg) | |
1708 | { | |
1709 | CPUState *cpu = arg; | |
1710 | ||
1711 | assert(tcg_enabled()); | |
1712 | g_assert(!use_icount); | |
1713 | ||
1714 | rcu_register_thread(); | |
1715 | tcg_register_thread(); | |
1716 | ||
1717 | qemu_mutex_lock_iothread(); | |
1718 | qemu_thread_get_self(cpu->thread); | |
1719 | ||
1720 | cpu->thread_id = qemu_get_thread_id(); | |
1721 | cpu->created = true; | |
1722 | cpu->can_do_io = 1; | |
1723 | current_cpu = cpu; | |
1724 | qemu_cond_signal(&qemu_cpu_cond); | |
1725 | ||
1726 | /* process any pending work */ | |
1727 | cpu->exit_request = 1; | |
1728 | ||
1729 | do { | |
1730 | if (cpu_can_run(cpu)) { | |
1731 | int r; | |
1732 | qemu_mutex_unlock_iothread(); | |
1733 | r = tcg_cpu_exec(cpu); | |
1734 | qemu_mutex_lock_iothread(); | |
1735 | switch (r) { | |
1736 | case EXCP_DEBUG: | |
1737 | cpu_handle_guest_debug(cpu); | |
1738 | break; | |
1739 | case EXCP_HALTED: | |
1740 | /* during start-up the vCPU is reset and the thread is | |
1741 | * kicked several times. If we don't ensure we go back | |
1742 | * to sleep in the halted state we won't cleanly | |
1743 | * start-up when the vCPU is enabled. | |
1744 | * | |
1745 | * cpu->halted should ensure we sleep in wait_io_event | |
1746 | */ | |
1747 | g_assert(cpu->halted); | |
1748 | break; | |
1749 | case EXCP_ATOMIC: | |
1750 | qemu_mutex_unlock_iothread(); | |
1751 | cpu_exec_step_atomic(cpu); | |
1752 | qemu_mutex_lock_iothread(); | |
1753 | default: | |
1754 | /* Ignore everything else? */ | |
1755 | break; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | atomic_mb_set(&cpu->exit_request, 0); | |
1760 | qemu_wait_io_event(cpu); | |
1761 | } while (!cpu->unplug || cpu_can_run(cpu)); | |
1762 | ||
1763 | qemu_tcg_destroy_vcpu(cpu); | |
1764 | cpu->created = false; | |
1765 | qemu_cond_signal(&qemu_cpu_cond); | |
1766 | qemu_mutex_unlock_iothread(); | |
1767 | rcu_unregister_thread(); | |
1768 | return NULL; | |
1769 | } | |
1770 | ||
1771 | static void qemu_cpu_kick_thread(CPUState *cpu) | |
1772 | { | |
1773 | #ifndef _WIN32 | |
1774 | int err; | |
1775 | ||
1776 | if (cpu->thread_kicked) { | |
1777 | return; | |
1778 | } | |
1779 | cpu->thread_kicked = true; | |
1780 | err = pthread_kill(cpu->thread->thread, SIG_IPI); | |
1781 | if (err) { | |
1782 | fprintf(stderr, "qemu:%s: %s", __func__, strerror(err)); | |
1783 | exit(1); | |
1784 | } | |
1785 | #else /* _WIN32 */ | |
1786 | if (!qemu_cpu_is_self(cpu)) { | |
1787 | if (whpx_enabled()) { | |
1788 | whpx_vcpu_kick(cpu); | |
1789 | } else if (!QueueUserAPC(dummy_apc_func, cpu->hThread, 0)) { | |
1790 | fprintf(stderr, "%s: QueueUserAPC failed with error %lu\n", | |
1791 | __func__, GetLastError()); | |
1792 | exit(1); | |
1793 | } | |
1794 | } | |
1795 | #endif | |
1796 | } | |
1797 | ||
1798 | void qemu_cpu_kick(CPUState *cpu) | |
1799 | { | |
1800 | qemu_cond_broadcast(cpu->halt_cond); | |
1801 | if (tcg_enabled()) { | |
1802 | cpu_exit(cpu); | |
1803 | /* NOP unless doing single-thread RR */ | |
1804 | qemu_cpu_kick_rr_cpu(); | |
1805 | } else { | |
1806 | if (hax_enabled()) { | |
1807 | /* | |
1808 | * FIXME: race condition with the exit_request check in | |
1809 | * hax_vcpu_hax_exec | |
1810 | */ | |
1811 | cpu->exit_request = 1; | |
1812 | } | |
1813 | qemu_cpu_kick_thread(cpu); | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | void qemu_cpu_kick_self(void) | |
1818 | { | |
1819 | assert(current_cpu); | |
1820 | qemu_cpu_kick_thread(current_cpu); | |
1821 | } | |
1822 | ||
1823 | bool qemu_cpu_is_self(CPUState *cpu) | |
1824 | { | |
1825 | return qemu_thread_is_self(cpu->thread); | |
1826 | } | |
1827 | ||
1828 | bool qemu_in_vcpu_thread(void) | |
1829 | { | |
1830 | return current_cpu && qemu_cpu_is_self(current_cpu); | |
1831 | } | |
1832 | ||
1833 | static __thread bool iothread_locked = false; | |
1834 | ||
1835 | bool qemu_mutex_iothread_locked(void) | |
1836 | { | |
1837 | return iothread_locked; | |
1838 | } | |
1839 | ||
1840 | /* | |
1841 | * The BQL is taken from so many places that it is worth profiling the | |
1842 | * callers directly, instead of funneling them all through a single function. | |
1843 | */ | |
1844 | void qemu_mutex_lock_iothread_impl(const char *file, int line) | |
1845 | { | |
1846 | QemuMutexLockFunc bql_lock = atomic_read(&qemu_bql_mutex_lock_func); | |
1847 | ||
1848 | g_assert(!qemu_mutex_iothread_locked()); | |
1849 | bql_lock(&qemu_global_mutex, file, line); | |
1850 | iothread_locked = true; | |
1851 | } | |
1852 | ||
1853 | void qemu_mutex_unlock_iothread(void) | |
1854 | { | |
1855 | g_assert(qemu_mutex_iothread_locked()); | |
1856 | iothread_locked = false; | |
1857 | qemu_mutex_unlock(&qemu_global_mutex); | |
1858 | } | |
1859 | ||
1860 | static bool all_vcpus_paused(void) | |
1861 | { | |
1862 | CPUState *cpu; | |
1863 | ||
1864 | CPU_FOREACH(cpu) { | |
1865 | if (!cpu->stopped) { | |
1866 | return false; | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | return true; | |
1871 | } | |
1872 | ||
1873 | void pause_all_vcpus(void) | |
1874 | { | |
1875 | CPUState *cpu; | |
1876 | ||
1877 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, false); | |
1878 | CPU_FOREACH(cpu) { | |
1879 | if (qemu_cpu_is_self(cpu)) { | |
1880 | qemu_cpu_stop(cpu, true); | |
1881 | } else { | |
1882 | cpu->stop = true; | |
1883 | qemu_cpu_kick(cpu); | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | /* We need to drop the replay_lock so any vCPU threads woken up | |
1888 | * can finish their replay tasks | |
1889 | */ | |
1890 | replay_mutex_unlock(); | |
1891 | ||
1892 | while (!all_vcpus_paused()) { | |
1893 | qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); | |
1894 | CPU_FOREACH(cpu) { | |
1895 | qemu_cpu_kick(cpu); | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | qemu_mutex_unlock_iothread(); | |
1900 | replay_mutex_lock(); | |
1901 | qemu_mutex_lock_iothread(); | |
1902 | } | |
1903 | ||
1904 | void cpu_resume(CPUState *cpu) | |
1905 | { | |
1906 | cpu->stop = false; | |
1907 | cpu->stopped = false; | |
1908 | qemu_cpu_kick(cpu); | |
1909 | } | |
1910 | ||
1911 | void resume_all_vcpus(void) | |
1912 | { | |
1913 | CPUState *cpu; | |
1914 | ||
1915 | qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true); | |
1916 | CPU_FOREACH(cpu) { | |
1917 | cpu_resume(cpu); | |
1918 | } | |
1919 | } | |
1920 | ||
1921 | void cpu_remove_sync(CPUState *cpu) | |
1922 | { | |
1923 | cpu->stop = true; | |
1924 | cpu->unplug = true; | |
1925 | qemu_cpu_kick(cpu); | |
1926 | qemu_mutex_unlock_iothread(); | |
1927 | qemu_thread_join(cpu->thread); | |
1928 | qemu_mutex_lock_iothread(); | |
1929 | } | |
1930 | ||
1931 | /* For temporary buffers for forming a name */ | |
1932 | #define VCPU_THREAD_NAME_SIZE 16 | |
1933 | ||
1934 | static void qemu_tcg_init_vcpu(CPUState *cpu) | |
1935 | { | |
1936 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
1937 | static QemuCond *single_tcg_halt_cond; | |
1938 | static QemuThread *single_tcg_cpu_thread; | |
1939 | static int tcg_region_inited; | |
1940 | ||
1941 | assert(tcg_enabled()); | |
1942 | /* | |
1943 | * Initialize TCG regions--once. Now is a good time, because: | |
1944 | * (1) TCG's init context, prologue and target globals have been set up. | |
1945 | * (2) qemu_tcg_mttcg_enabled() works now (TCG init code runs before the | |
1946 | * -accel flag is processed, so the check doesn't work then). | |
1947 | */ | |
1948 | if (!tcg_region_inited) { | |
1949 | tcg_region_inited = 1; | |
1950 | tcg_region_init(); | |
1951 | } | |
1952 | ||
1953 | if (qemu_tcg_mttcg_enabled() || !single_tcg_cpu_thread) { | |
1954 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
1955 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
1956 | qemu_cond_init(cpu->halt_cond); | |
1957 | ||
1958 | if (qemu_tcg_mttcg_enabled()) { | |
1959 | /* create a thread per vCPU with TCG (MTTCG) */ | |
1960 | parallel_cpus = true; | |
1961 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/TCG", | |
1962 | cpu->cpu_index); | |
1963 | ||
1964 | qemu_thread_create(cpu->thread, thread_name, qemu_tcg_cpu_thread_fn, | |
1965 | cpu, QEMU_THREAD_JOINABLE); | |
1966 | ||
1967 | } else { | |
1968 | /* share a single thread for all cpus with TCG */ | |
1969 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "ALL CPUs/TCG"); | |
1970 | qemu_thread_create(cpu->thread, thread_name, | |
1971 | qemu_tcg_rr_cpu_thread_fn, | |
1972 | cpu, QEMU_THREAD_JOINABLE); | |
1973 | ||
1974 | single_tcg_halt_cond = cpu->halt_cond; | |
1975 | single_tcg_cpu_thread = cpu->thread; | |
1976 | } | |
1977 | #ifdef _WIN32 | |
1978 | cpu->hThread = qemu_thread_get_handle(cpu->thread); | |
1979 | #endif | |
1980 | } else { | |
1981 | /* For non-MTTCG cases we share the thread */ | |
1982 | cpu->thread = single_tcg_cpu_thread; | |
1983 | cpu->halt_cond = single_tcg_halt_cond; | |
1984 | cpu->thread_id = first_cpu->thread_id; | |
1985 | cpu->can_do_io = 1; | |
1986 | cpu->created = true; | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | static void qemu_hax_start_vcpu(CPUState *cpu) | |
1991 | { | |
1992 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
1993 | ||
1994 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
1995 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
1996 | qemu_cond_init(cpu->halt_cond); | |
1997 | ||
1998 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HAX", | |
1999 | cpu->cpu_index); | |
2000 | qemu_thread_create(cpu->thread, thread_name, qemu_hax_cpu_thread_fn, | |
2001 | cpu, QEMU_THREAD_JOINABLE); | |
2002 | #ifdef _WIN32 | |
2003 | cpu->hThread = qemu_thread_get_handle(cpu->thread); | |
2004 | #endif | |
2005 | } | |
2006 | ||
2007 | static void qemu_kvm_start_vcpu(CPUState *cpu) | |
2008 | { | |
2009 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
2010 | ||
2011 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
2012 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
2013 | qemu_cond_init(cpu->halt_cond); | |
2014 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM", | |
2015 | cpu->cpu_index); | |
2016 | qemu_thread_create(cpu->thread, thread_name, qemu_kvm_cpu_thread_fn, | |
2017 | cpu, QEMU_THREAD_JOINABLE); | |
2018 | } | |
2019 | ||
2020 | static void qemu_hvf_start_vcpu(CPUState *cpu) | |
2021 | { | |
2022 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
2023 | ||
2024 | /* HVF currently does not support TCG, and only runs in | |
2025 | * unrestricted-guest mode. */ | |
2026 | assert(hvf_enabled()); | |
2027 | ||
2028 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
2029 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
2030 | qemu_cond_init(cpu->halt_cond); | |
2031 | ||
2032 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF", | |
2033 | cpu->cpu_index); | |
2034 | qemu_thread_create(cpu->thread, thread_name, qemu_hvf_cpu_thread_fn, | |
2035 | cpu, QEMU_THREAD_JOINABLE); | |
2036 | } | |
2037 | ||
2038 | static void qemu_whpx_start_vcpu(CPUState *cpu) | |
2039 | { | |
2040 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
2041 | ||
2042 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
2043 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
2044 | qemu_cond_init(cpu->halt_cond); | |
2045 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX", | |
2046 | cpu->cpu_index); | |
2047 | qemu_thread_create(cpu->thread, thread_name, qemu_whpx_cpu_thread_fn, | |
2048 | cpu, QEMU_THREAD_JOINABLE); | |
2049 | #ifdef _WIN32 | |
2050 | cpu->hThread = qemu_thread_get_handle(cpu->thread); | |
2051 | #endif | |
2052 | } | |
2053 | ||
2054 | static void qemu_dummy_start_vcpu(CPUState *cpu) | |
2055 | { | |
2056 | char thread_name[VCPU_THREAD_NAME_SIZE]; | |
2057 | ||
2058 | cpu->thread = g_malloc0(sizeof(QemuThread)); | |
2059 | cpu->halt_cond = g_malloc0(sizeof(QemuCond)); | |
2060 | qemu_cond_init(cpu->halt_cond); | |
2061 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/DUMMY", | |
2062 | cpu->cpu_index); | |
2063 | qemu_thread_create(cpu->thread, thread_name, qemu_dummy_cpu_thread_fn, cpu, | |
2064 | QEMU_THREAD_JOINABLE); | |
2065 | } | |
2066 | ||
2067 | void qemu_init_vcpu(CPUState *cpu) | |
2068 | { | |
2069 | cpu->nr_cores = smp_cores; | |
2070 | cpu->nr_threads = smp_threads; | |
2071 | cpu->stopped = true; | |
2072 | ||
2073 | if (!cpu->as) { | |
2074 | /* If the target cpu hasn't set up any address spaces itself, | |
2075 | * give it the default one. | |
2076 | */ | |
2077 | cpu->num_ases = 1; | |
2078 | cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory); | |
2079 | } | |
2080 | ||
2081 | if (kvm_enabled()) { | |
2082 | qemu_kvm_start_vcpu(cpu); | |
2083 | } else if (hax_enabled()) { | |
2084 | qemu_hax_start_vcpu(cpu); | |
2085 | } else if (hvf_enabled()) { | |
2086 | qemu_hvf_start_vcpu(cpu); | |
2087 | } else if (tcg_enabled()) { | |
2088 | qemu_tcg_init_vcpu(cpu); | |
2089 | } else if (whpx_enabled()) { | |
2090 | qemu_whpx_start_vcpu(cpu); | |
2091 | } else { | |
2092 | qemu_dummy_start_vcpu(cpu); | |
2093 | } | |
2094 | ||
2095 | while (!cpu->created) { | |
2096 | qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); | |
2097 | } | |
2098 | } | |
2099 | ||
2100 | void cpu_stop_current(void) | |
2101 | { | |
2102 | if (current_cpu) { | |
2103 | current_cpu->stop = true; | |
2104 | cpu_exit(current_cpu); | |
2105 | } | |
2106 | } | |
2107 | ||
2108 | int vm_stop(RunState state) | |
2109 | { | |
2110 | if (qemu_in_vcpu_thread()) { | |
2111 | qemu_system_vmstop_request_prepare(); | |
2112 | qemu_system_vmstop_request(state); | |
2113 | /* | |
2114 | * FIXME: should not return to device code in case | |
2115 | * vm_stop() has been requested. | |
2116 | */ | |
2117 | cpu_stop_current(); | |
2118 | return 0; | |
2119 | } | |
2120 | ||
2121 | return do_vm_stop(state, true); | |
2122 | } | |
2123 | ||
2124 | /** | |
2125 | * Prepare for (re)starting the VM. | |
2126 | * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already | |
2127 | * running or in case of an error condition), 0 otherwise. | |
2128 | */ | |
2129 | int vm_prepare_start(void) | |
2130 | { | |
2131 | RunState requested; | |
2132 | ||
2133 | qemu_vmstop_requested(&requested); | |
2134 | if (runstate_is_running() && requested == RUN_STATE__MAX) { | |
2135 | return -1; | |
2136 | } | |
2137 | ||
2138 | /* Ensure that a STOP/RESUME pair of events is emitted if a | |
2139 | * vmstop request was pending. The BLOCK_IO_ERROR event, for | |
2140 | * example, according to documentation is always followed by | |
2141 | * the STOP event. | |
2142 | */ | |
2143 | if (runstate_is_running()) { | |
2144 | qapi_event_send_stop(); | |
2145 | qapi_event_send_resume(); | |
2146 | return -1; | |
2147 | } | |
2148 | ||
2149 | /* We are sending this now, but the CPUs will be resumed shortly later */ | |
2150 | qapi_event_send_resume(); | |
2151 | ||
2152 | replay_enable_events(); | |
2153 | cpu_enable_ticks(); | |
2154 | runstate_set(RUN_STATE_RUNNING); | |
2155 | vm_state_notify(1, RUN_STATE_RUNNING); | |
2156 | return 0; | |
2157 | } | |
2158 | ||
2159 | void vm_start(void) | |
2160 | { | |
2161 | if (!vm_prepare_start()) { | |
2162 | resume_all_vcpus(); | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | /* does a state transition even if the VM is already stopped, | |
2167 | current state is forgotten forever */ | |
2168 | int vm_stop_force_state(RunState state) | |
2169 | { | |
2170 | if (runstate_is_running()) { | |
2171 | return vm_stop(state); | |
2172 | } else { | |
2173 | runstate_set(state); | |
2174 | ||
2175 | bdrv_drain_all(); | |
2176 | /* Make sure to return an error if the flush in a previous vm_stop() | |
2177 | * failed. */ | |
2178 | return bdrv_flush_all(); | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | void list_cpus(FILE *f, fprintf_function cpu_fprintf, const char *optarg) | |
2183 | { | |
2184 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
2185 | #if defined(cpu_list) | |
2186 | cpu_list(f, cpu_fprintf); | |
2187 | #endif | |
2188 | } | |
2189 | ||
2190 | CpuInfoList *qmp_query_cpus(Error **errp) | |
2191 | { | |
2192 | MachineState *ms = MACHINE(qdev_get_machine()); | |
2193 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
2194 | CpuInfoList *head = NULL, *cur_item = NULL; | |
2195 | CPUState *cpu; | |
2196 | ||
2197 | CPU_FOREACH(cpu) { | |
2198 | CpuInfoList *info; | |
2199 | #if defined(TARGET_I386) | |
2200 | X86CPU *x86_cpu = X86_CPU(cpu); | |
2201 | CPUX86State *env = &x86_cpu->env; | |
2202 | #elif defined(TARGET_PPC) | |
2203 | PowerPCCPU *ppc_cpu = POWERPC_CPU(cpu); | |
2204 | CPUPPCState *env = &ppc_cpu->env; | |
2205 | #elif defined(TARGET_SPARC) | |
2206 | SPARCCPU *sparc_cpu = SPARC_CPU(cpu); | |
2207 | CPUSPARCState *env = &sparc_cpu->env; | |
2208 | #elif defined(TARGET_RISCV) | |
2209 | RISCVCPU *riscv_cpu = RISCV_CPU(cpu); | |
2210 | CPURISCVState *env = &riscv_cpu->env; | |
2211 | #elif defined(TARGET_MIPS) | |
2212 | MIPSCPU *mips_cpu = MIPS_CPU(cpu); | |
2213 | CPUMIPSState *env = &mips_cpu->env; | |
2214 | #elif defined(TARGET_TRICORE) | |
2215 | TriCoreCPU *tricore_cpu = TRICORE_CPU(cpu); | |
2216 | CPUTriCoreState *env = &tricore_cpu->env; | |
2217 | #elif defined(TARGET_S390X) | |
2218 | S390CPU *s390_cpu = S390_CPU(cpu); | |
2219 | CPUS390XState *env = &s390_cpu->env; | |
2220 | #endif | |
2221 | ||
2222 | cpu_synchronize_state(cpu); | |
2223 | ||
2224 | info = g_malloc0(sizeof(*info)); | |
2225 | info->value = g_malloc0(sizeof(*info->value)); | |
2226 | info->value->CPU = cpu->cpu_index; | |
2227 | info->value->current = (cpu == first_cpu); | |
2228 | info->value->halted = cpu->halted; | |
2229 | info->value->qom_path = object_get_canonical_path(OBJECT(cpu)); | |
2230 | info->value->thread_id = cpu->thread_id; | |
2231 | #if defined(TARGET_I386) | |
2232 | info->value->arch = CPU_INFO_ARCH_X86; | |
2233 | info->value->u.x86.pc = env->eip + env->segs[R_CS].base; | |
2234 | #elif defined(TARGET_PPC) | |
2235 | info->value->arch = CPU_INFO_ARCH_PPC; | |
2236 | info->value->u.ppc.nip = env->nip; | |
2237 | #elif defined(TARGET_SPARC) | |
2238 | info->value->arch = CPU_INFO_ARCH_SPARC; | |
2239 | info->value->u.q_sparc.pc = env->pc; | |
2240 | info->value->u.q_sparc.npc = env->npc; | |
2241 | #elif defined(TARGET_MIPS) | |
2242 | info->value->arch = CPU_INFO_ARCH_MIPS; | |
2243 | info->value->u.q_mips.PC = env->active_tc.PC; | |
2244 | #elif defined(TARGET_TRICORE) | |
2245 | info->value->arch = CPU_INFO_ARCH_TRICORE; | |
2246 | info->value->u.tricore.PC = env->PC; | |
2247 | #elif defined(TARGET_S390X) | |
2248 | info->value->arch = CPU_INFO_ARCH_S390; | |
2249 | info->value->u.s390.cpu_state = env->cpu_state; | |
2250 | #elif defined(TARGET_RISCV) | |
2251 | info->value->arch = CPU_INFO_ARCH_RISCV; | |
2252 | info->value->u.riscv.pc = env->pc; | |
2253 | #else | |
2254 | info->value->arch = CPU_INFO_ARCH_OTHER; | |
2255 | #endif | |
2256 | info->value->has_props = !!mc->cpu_index_to_instance_props; | |
2257 | if (info->value->has_props) { | |
2258 | CpuInstanceProperties *props; | |
2259 | props = g_malloc0(sizeof(*props)); | |
2260 | *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index); | |
2261 | info->value->props = props; | |
2262 | } | |
2263 | ||
2264 | /* XXX: waiting for the qapi to support GSList */ | |
2265 | if (!cur_item) { | |
2266 | head = cur_item = info; | |
2267 | } else { | |
2268 | cur_item->next = info; | |
2269 | cur_item = info; | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | return head; | |
2274 | } | |
2275 | ||
2276 | static CpuInfoArch sysemu_target_to_cpuinfo_arch(SysEmuTarget target) | |
2277 | { | |
2278 | /* | |
2279 | * The @SysEmuTarget -> @CpuInfoArch mapping below is based on the | |
2280 | * TARGET_ARCH -> TARGET_BASE_ARCH mapping in the "configure" script. | |
2281 | */ | |
2282 | switch (target) { | |
2283 | case SYS_EMU_TARGET_I386: | |
2284 | case SYS_EMU_TARGET_X86_64: | |
2285 | return CPU_INFO_ARCH_X86; | |
2286 | ||
2287 | case SYS_EMU_TARGET_PPC: | |
2288 | case SYS_EMU_TARGET_PPC64: | |
2289 | return CPU_INFO_ARCH_PPC; | |
2290 | ||
2291 | case SYS_EMU_TARGET_SPARC: | |
2292 | case SYS_EMU_TARGET_SPARC64: | |
2293 | return CPU_INFO_ARCH_SPARC; | |
2294 | ||
2295 | case SYS_EMU_TARGET_MIPS: | |
2296 | case SYS_EMU_TARGET_MIPSEL: | |
2297 | case SYS_EMU_TARGET_MIPS64: | |
2298 | case SYS_EMU_TARGET_MIPS64EL: | |
2299 | return CPU_INFO_ARCH_MIPS; | |
2300 | ||
2301 | case SYS_EMU_TARGET_TRICORE: | |
2302 | return CPU_INFO_ARCH_TRICORE; | |
2303 | ||
2304 | case SYS_EMU_TARGET_S390X: | |
2305 | return CPU_INFO_ARCH_S390; | |
2306 | ||
2307 | case SYS_EMU_TARGET_RISCV32: | |
2308 | case SYS_EMU_TARGET_RISCV64: | |
2309 | return CPU_INFO_ARCH_RISCV; | |
2310 | ||
2311 | default: | |
2312 | return CPU_INFO_ARCH_OTHER; | |
2313 | } | |
2314 | } | |
2315 | ||
2316 | static void cpustate_to_cpuinfo_s390(CpuInfoS390 *info, const CPUState *cpu) | |
2317 | { | |
2318 | #ifdef TARGET_S390X | |
2319 | S390CPU *s390_cpu = S390_CPU(cpu); | |
2320 | CPUS390XState *env = &s390_cpu->env; | |
2321 | ||
2322 | info->cpu_state = env->cpu_state; | |
2323 | #else | |
2324 | abort(); | |
2325 | #endif | |
2326 | } | |
2327 | ||
2328 | /* | |
2329 | * fast means: we NEVER interrupt vCPU threads to retrieve | |
2330 | * information from KVM. | |
2331 | */ | |
2332 | CpuInfoFastList *qmp_query_cpus_fast(Error **errp) | |
2333 | { | |
2334 | MachineState *ms = MACHINE(qdev_get_machine()); | |
2335 | MachineClass *mc = MACHINE_GET_CLASS(ms); | |
2336 | CpuInfoFastList *head = NULL, *cur_item = NULL; | |
2337 | SysEmuTarget target = qapi_enum_parse(&SysEmuTarget_lookup, TARGET_NAME, | |
2338 | -1, &error_abort); | |
2339 | CPUState *cpu; | |
2340 | ||
2341 | CPU_FOREACH(cpu) { | |
2342 | CpuInfoFastList *info = g_malloc0(sizeof(*info)); | |
2343 | info->value = g_malloc0(sizeof(*info->value)); | |
2344 | ||
2345 | info->value->cpu_index = cpu->cpu_index; | |
2346 | info->value->qom_path = object_get_canonical_path(OBJECT(cpu)); | |
2347 | info->value->thread_id = cpu->thread_id; | |
2348 | ||
2349 | info->value->has_props = !!mc->cpu_index_to_instance_props; | |
2350 | if (info->value->has_props) { | |
2351 | CpuInstanceProperties *props; | |
2352 | props = g_malloc0(sizeof(*props)); | |
2353 | *props = mc->cpu_index_to_instance_props(ms, cpu->cpu_index); | |
2354 | info->value->props = props; | |
2355 | } | |
2356 | ||
2357 | info->value->arch = sysemu_target_to_cpuinfo_arch(target); | |
2358 | info->value->target = target; | |
2359 | if (target == SYS_EMU_TARGET_S390X) { | |
2360 | cpustate_to_cpuinfo_s390(&info->value->u.s390x, cpu); | |
2361 | } | |
2362 | ||
2363 | if (!cur_item) { | |
2364 | head = cur_item = info; | |
2365 | } else { | |
2366 | cur_item->next = info; | |
2367 | cur_item = info; | |
2368 | } | |
2369 | } | |
2370 | ||
2371 | return head; | |
2372 | } | |
2373 | ||
2374 | void qmp_memsave(int64_t addr, int64_t size, const char *filename, | |
2375 | bool has_cpu, int64_t cpu_index, Error **errp) | |
2376 | { | |
2377 | FILE *f; | |
2378 | uint32_t l; | |
2379 | CPUState *cpu; | |
2380 | uint8_t buf[1024]; | |
2381 | int64_t orig_addr = addr, orig_size = size; | |
2382 | ||
2383 | if (!has_cpu) { | |
2384 | cpu_index = 0; | |
2385 | } | |
2386 | ||
2387 | cpu = qemu_get_cpu(cpu_index); | |
2388 | if (cpu == NULL) { | |
2389 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index", | |
2390 | "a CPU number"); | |
2391 | return; | |
2392 | } | |
2393 | ||
2394 | f = fopen(filename, "wb"); | |
2395 | if (!f) { | |
2396 | error_setg_file_open(errp, errno, filename); | |
2397 | return; | |
2398 | } | |
2399 | ||
2400 | while (size != 0) { | |
2401 | l = sizeof(buf); | |
2402 | if (l > size) | |
2403 | l = size; | |
2404 | if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) { | |
2405 | error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRId64 | |
2406 | " specified", orig_addr, orig_size); | |
2407 | goto exit; | |
2408 | } | |
2409 | if (fwrite(buf, 1, l, f) != l) { | |
2410 | error_setg(errp, QERR_IO_ERROR); | |
2411 | goto exit; | |
2412 | } | |
2413 | addr += l; | |
2414 | size -= l; | |
2415 | } | |
2416 | ||
2417 | exit: | |
2418 | fclose(f); | |
2419 | } | |
2420 | ||
2421 | void qmp_pmemsave(int64_t addr, int64_t size, const char *filename, | |
2422 | Error **errp) | |
2423 | { | |
2424 | FILE *f; | |
2425 | uint32_t l; | |
2426 | uint8_t buf[1024]; | |
2427 | ||
2428 | f = fopen(filename, "wb"); | |
2429 | if (!f) { | |
2430 | error_setg_file_open(errp, errno, filename); | |
2431 | return; | |
2432 | } | |
2433 | ||
2434 | while (size != 0) { | |
2435 | l = sizeof(buf); | |
2436 | if (l > size) | |
2437 | l = size; | |
2438 | cpu_physical_memory_read(addr, buf, l); | |
2439 | if (fwrite(buf, 1, l, f) != l) { | |
2440 | error_setg(errp, QERR_IO_ERROR); | |
2441 | goto exit; | |
2442 | } | |
2443 | addr += l; | |
2444 | size -= l; | |
2445 | } | |
2446 | ||
2447 | exit: | |
2448 | fclose(f); | |
2449 | } | |
2450 | ||
2451 | void qmp_inject_nmi(Error **errp) | |
2452 | { | |
2453 | nmi_monitor_handle(monitor_get_cpu_index(), errp); | |
2454 | } | |
2455 | ||
2456 | void dump_drift_info(FILE *f, fprintf_function cpu_fprintf) | |
2457 | { | |
2458 | if (!use_icount) { | |
2459 | return; | |
2460 | } | |
2461 | ||
2462 | cpu_fprintf(f, "Host - Guest clock %"PRIi64" ms\n", | |
2463 | (cpu_get_clock() - cpu_get_icount())/SCALE_MS); | |
2464 | if (icount_align_option) { | |
2465 | cpu_fprintf(f, "Max guest delay %"PRIi64" ms\n", -max_delay/SCALE_MS); | |
2466 | cpu_fprintf(f, "Max guest advance %"PRIi64" ms\n", max_advance/SCALE_MS); | |
2467 | } else { | |
2468 | cpu_fprintf(f, "Max guest delay NA\n"); | |
2469 | cpu_fprintf(f, "Max guest advance NA\n"); | |
2470 | } | |
2471 | } |