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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / builtin-kvm.c
blob460945ded6dd23a87e0b362abb67a215b3a61cfb
1 // SPDX-License-Identifier: GPL-2.0
2 #include "builtin.h"
3 #include "perf.h"
4
5 #include "util/build-id.h"
6 #include "util/evsel.h"
7 #include "util/evlist.h"
8 #include "util/mmap.h"
9 #include "util/term.h"
10 #include "util/symbol.h"
11 #include "util/thread.h"
12 #include "util/header.h"
13 #include "util/session.h"
14 #include "util/intlist.h"
15 #include <subcmd/pager.h>
16 #include <subcmd/parse-options.h>
17 #include "util/trace-event.h"
18 #include "util/debug.h"
19 #include "util/tool.h"
20 #include "util/stat.h"
21 #include "util/synthetic-events.h"
22 #include "util/top.h"
23 #include "util/data.h"
24 #include "util/ordered-events.h"
25 #include "util/kvm-stat.h"
26 #include "ui/ui.h"
27
28 #include <sys/prctl.h>
29 #ifdef HAVE_TIMERFD_SUPPORT
30 #include <sys/timerfd.h>
31 #endif
32 #include <sys/time.h>
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <fcntl.h>
36
37 #include <linux/err.h>
38 #include <linux/kernel.h>
39 #include <linux/string.h>
40 #include <linux/time64.h>
41 #include <linux/zalloc.h>
42 #include <errno.h>
43 #include <inttypes.h>
44 #include <poll.h>
45 #include <termios.h>
46 #include <semaphore.h>
47 #include <signal.h>
48 #include <math.h>
49 #include <perf/mmap.h>
50
51 static const char *get_filename_for_perf_kvm(void)
52 {
53 const char *filename;
54
55 if (perf_host && !perf_guest)
56 filename = strdup("perf.data.host");
57 else if (!perf_host && perf_guest)
58 filename = strdup("perf.data.guest");
59 else
60 filename = strdup("perf.data.kvm");
61
62 return filename;
63 }
64
65 #ifdef HAVE_KVM_STAT_SUPPORT
66
67 void exit_event_get_key(struct evsel *evsel,
68 struct perf_sample *sample,
69 struct event_key *key)
70 {
71 key->info = 0;
72 key->key = evsel__intval(evsel, sample, kvm_exit_reason);
73 }
74
75 bool kvm_exit_event(struct evsel *evsel)
76 {
77 return !strcmp(evsel->name, kvm_exit_trace);
78 }
79
80 bool exit_event_begin(struct evsel *evsel,
81 struct perf_sample *sample, struct event_key *key)
82 {
83 if (kvm_exit_event(evsel)) {
84 exit_event_get_key(evsel, sample, key);
85 return true;
86 }
87
88 return false;
89 }
90
91 bool kvm_entry_event(struct evsel *evsel)
92 {
93 return !strcmp(evsel->name, kvm_entry_trace);
94 }
95
96 bool exit_event_end(struct evsel *evsel,
97 struct perf_sample *sample __maybe_unused,
98 struct event_key *key __maybe_unused)
99 {
100 return kvm_entry_event(evsel);
101 }
102
103 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
104 struct exit_reasons_table *tbl,
105 u64 exit_code)
106 {
107 while (tbl->reason != NULL) {
108 if (tbl->exit_code == exit_code)
109 return tbl->reason;
110 tbl++;
111 }
112
113 pr_err("unknown kvm exit code:%lld on %s\n",
114 (unsigned long long)exit_code, kvm->exit_reasons_isa);
115 return "UNKNOWN";
116 }
117
118 void exit_event_decode_key(struct perf_kvm_stat *kvm,
119 struct event_key *key,
120 char *decode)
121 {
122 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
123 key->key);
124
125 scnprintf(decode, decode_str_len, "%s", exit_reason);
126 }
127
128 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
129 {
130 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
131
132 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
133 if (!strcmp(events_ops->name, kvm->report_event)) {
134 kvm->events_ops = events_ops->ops;
135 return true;
136 }
137 }
138
139 return false;
140 }
141
142 struct vcpu_event_record {
143 int vcpu_id;
144 u64 start_time;
145 struct kvm_event *last_event;
146 };
147
148
149 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
150 {
151 unsigned int i;
152
153 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
154 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
155 }
156
157 #ifdef HAVE_TIMERFD_SUPPORT
158 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
159 {
160 struct list_head *head;
161 struct kvm_event *event;
162 unsigned int i;
163 int j;
164
165 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
166 head = &kvm_events_cache[i];
167 list_for_each_entry(event, head, hash_entry) {
168 /* reset stats for event */
169 event->total.time = 0;
170 init_stats(&event->total.stats);
171
172 for (j = 0; j < event->max_vcpu; ++j) {
173 event->vcpu[j].time = 0;
174 init_stats(&event->vcpu[j].stats);
175 }
176 }
177 }
178 }
179 #endif
180
181 static int kvm_events_hash_fn(u64 key)
182 {
183 return key & (EVENTS_CACHE_SIZE - 1);
184 }
185
186 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
187 {
188 int old_max_vcpu = event->max_vcpu;
189 void *prev;
190
191 if (vcpu_id < event->max_vcpu)
192 return true;
193
194 while (event->max_vcpu <= vcpu_id)
195 event->max_vcpu += DEFAULT_VCPU_NUM;
196
197 prev = event->vcpu;
198 event->vcpu = realloc(event->vcpu,
199 event->max_vcpu * sizeof(*event->vcpu));
200 if (!event->vcpu) {
201 free(prev);
202 pr_err("Not enough memory\n");
203 return false;
204 }
205
206 memset(event->vcpu + old_max_vcpu, 0,
207 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
208 return true;
209 }
210
211 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
212 {
213 struct kvm_event *event;
214
215 event = zalloc(sizeof(*event));
216 if (!event) {
217 pr_err("Not enough memory\n");
218 return NULL;
219 }
220
221 event->key = *key;
222 init_stats(&event->total.stats);
223 return event;
224 }
225
226 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
227 struct event_key *key)
228 {
229 struct kvm_event *event;
230 struct list_head *head;
231
232 BUG_ON(key->key == INVALID_KEY);
233
234 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
235 list_for_each_entry(event, head, hash_entry) {
236 if (event->key.key == key->key && event->key.info == key->info)
237 return event;
238 }
239
240 event = kvm_alloc_init_event(key);
241 if (!event)
242 return NULL;
243
244 list_add(&event->hash_entry, head);
245 return event;
246 }
247
248 static bool handle_begin_event(struct perf_kvm_stat *kvm,
249 struct vcpu_event_record *vcpu_record,
250 struct event_key *key, u64 timestamp)
251 {
252 struct kvm_event *event = NULL;
253
254 if (key->key != INVALID_KEY)
255 event = find_create_kvm_event(kvm, key);
256
257 vcpu_record->last_event = event;
258 vcpu_record->start_time = timestamp;
259 return true;
260 }
261
262 static void
263 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
264 {
265 kvm_stats->time += time_diff;
266 update_stats(&kvm_stats->stats, time_diff);
267 }
268
269 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
270 {
271 struct kvm_event_stats *kvm_stats = &event->total;
272
273 if (vcpu_id != -1)
274 kvm_stats = &event->vcpu[vcpu_id];
275
276 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
277 avg_stats(&kvm_stats->stats));
278 }
279
280 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
281 u64 time_diff)
282 {
283 if (vcpu_id == -1) {
284 kvm_update_event_stats(&event->total, time_diff);
285 return true;
286 }
287
288 if (!kvm_event_expand(event, vcpu_id))
289 return false;
290
291 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
292 return true;
293 }
294
295 static bool is_child_event(struct perf_kvm_stat *kvm,
296 struct evsel *evsel,
297 struct perf_sample *sample,
298 struct event_key *key)
299 {
300 struct child_event_ops *child_ops;
301
302 child_ops = kvm->events_ops->child_ops;
303
304 if (!child_ops)
305 return false;
306
307 for (; child_ops->name; child_ops++) {
308 if (!strcmp(evsel->name, child_ops->name)) {
309 child_ops->get_key(evsel, sample, key);
310 return true;
311 }
312 }
313
314 return false;
315 }
316
317 static bool handle_child_event(struct perf_kvm_stat *kvm,
318 struct vcpu_event_record *vcpu_record,
319 struct event_key *key,
320 struct perf_sample *sample __maybe_unused)
321 {
322 struct kvm_event *event = NULL;
323
324 if (key->key != INVALID_KEY)
325 event = find_create_kvm_event(kvm, key);
326
327 vcpu_record->last_event = event;
328
329 return true;
330 }
331
332 static bool skip_event(const char *event)
333 {
334 const char * const *skip_events;
335
336 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
337 if (!strcmp(event, *skip_events))
338 return true;
339
340 return false;
341 }
342
343 static bool handle_end_event(struct perf_kvm_stat *kvm,
344 struct vcpu_event_record *vcpu_record,
345 struct event_key *key,
346 struct perf_sample *sample)
347 {
348 struct kvm_event *event;
349 u64 time_begin, time_diff;
350 int vcpu;
351
352 if (kvm->trace_vcpu == -1)
353 vcpu = -1;
354 else
355 vcpu = vcpu_record->vcpu_id;
356
357 event = vcpu_record->last_event;
358 time_begin = vcpu_record->start_time;
359
360 /* The begin event is not caught. */
361 if (!time_begin)
362 return true;
363
364 /*
365 * In some case, the 'begin event' only records the start timestamp,
366 * the actual event is recognized in the 'end event' (e.g. mmio-event).
367 */
368
369 /* Both begin and end events did not get the key. */
370 if (!event && key->key == INVALID_KEY)
371 return true;
372
373 if (!event)
374 event = find_create_kvm_event(kvm, key);
375
376 if (!event)
377 return false;
378
379 vcpu_record->last_event = NULL;
380 vcpu_record->start_time = 0;
381
382 /* seems to happen once in a while during live mode */
383 if (sample->time < time_begin) {
384 pr_debug("End time before begin time; skipping event.\n");
385 return true;
386 }
387
388 time_diff = sample->time - time_begin;
389
390 if (kvm->duration && time_diff > kvm->duration) {
391 char decode[decode_str_len];
392
393 kvm->events_ops->decode_key(kvm, &event->key, decode);
394 if (!skip_event(decode)) {
395 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
396 sample->time, sample->pid, vcpu_record->vcpu_id,
397 decode, time_diff / NSEC_PER_USEC);
398 }
399 }
400
401 return update_kvm_event(event, vcpu, time_diff);
402 }
403
404 static
405 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
406 struct evsel *evsel,
407 struct perf_sample *sample)
408 {
409 /* Only kvm_entry records vcpu id. */
410 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
411 struct vcpu_event_record *vcpu_record;
412
413 vcpu_record = zalloc(sizeof(*vcpu_record));
414 if (!vcpu_record) {
415 pr_err("%s: Not enough memory\n", __func__);
416 return NULL;
417 }
418
419 vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str);
420 thread__set_priv(thread, vcpu_record);
421 }
422
423 return thread__priv(thread);
424 }
425
426 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
427 struct thread *thread,
428 struct evsel *evsel,
429 struct perf_sample *sample)
430 {
431 struct vcpu_event_record *vcpu_record;
432 struct event_key key = { .key = INVALID_KEY,
433 .exit_reasons = kvm->exit_reasons };
434
435 vcpu_record = per_vcpu_record(thread, evsel, sample);
436 if (!vcpu_record)
437 return true;
438
439 /* only process events for vcpus user cares about */
440 if ((kvm->trace_vcpu != -1) &&
441 (kvm->trace_vcpu != vcpu_record->vcpu_id))
442 return true;
443
444 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
445 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
446
447 if (is_child_event(kvm, evsel, sample, &key))
448 return handle_child_event(kvm, vcpu_record, &key, sample);
449
450 if (kvm->events_ops->is_end_event(evsel, sample, &key))
451 return handle_end_event(kvm, vcpu_record, &key, sample);
452
453 return true;
454 }
455
456 #define GET_EVENT_KEY(func, field) \
457 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
458 { \
459 if (vcpu == -1) \
460 return event->total.field; \
461 \
462 if (vcpu >= event->max_vcpu) \
463 return 0; \
464 \
465 return event->vcpu[vcpu].field; \
466 }
467
468 #define COMPARE_EVENT_KEY(func, field) \
469 GET_EVENT_KEY(func, field) \
470 static int compare_kvm_event_ ## func(struct kvm_event *one, \
471 struct kvm_event *two, int vcpu)\
472 { \
473 return get_event_ ##func(one, vcpu) > \
474 get_event_ ##func(two, vcpu); \
475 }
476
477 GET_EVENT_KEY(time, time);
478 COMPARE_EVENT_KEY(count, stats.n);
479 COMPARE_EVENT_KEY(mean, stats.mean);
480 GET_EVENT_KEY(max, stats.max);
481 GET_EVENT_KEY(min, stats.min);
482
483 #define DEF_SORT_NAME_KEY(name, compare_key) \
484 { #name, compare_kvm_event_ ## compare_key }
485
486 static struct kvm_event_key keys[] = {
487 DEF_SORT_NAME_KEY(sample, count),
488 DEF_SORT_NAME_KEY(time, mean),
489 { NULL, NULL }
490 };
491
492 static bool select_key(struct perf_kvm_stat *kvm)
493 {
494 int i;
495
496 for (i = 0; keys[i].name; i++) {
497 if (!strcmp(keys[i].name, kvm->sort_key)) {
498 kvm->compare = keys[i].key;
499 return true;
500 }
501 }
502
503 pr_err("Unknown compare key:%s\n", kvm->sort_key);
504 return false;
505 }
506
507 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
508 key_cmp_fun bigger, int vcpu)
509 {
510 struct rb_node **rb = &result->rb_node;
511 struct rb_node *parent = NULL;
512 struct kvm_event *p;
513
514 while (*rb) {
515 p = container_of(*rb, struct kvm_event, rb);
516 parent = *rb;
517
518 if (bigger(event, p, vcpu))
519 rb = &(*rb)->rb_left;
520 else
521 rb = &(*rb)->rb_right;
522 }
523
524 rb_link_node(&event->rb, parent, rb);
525 rb_insert_color(&event->rb, result);
526 }
527
528 static void
529 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
530 {
531 int vcpu = kvm->trace_vcpu;
532
533 kvm->total_count += get_event_count(event, vcpu);
534 kvm->total_time += get_event_time(event, vcpu);
535 }
536
537 static bool event_is_valid(struct kvm_event *event, int vcpu)
538 {
539 return !!get_event_count(event, vcpu);
540 }
541
542 static void sort_result(struct perf_kvm_stat *kvm)
543 {
544 unsigned int i;
545 int vcpu = kvm->trace_vcpu;
546 struct kvm_event *event;
547
548 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
549 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
550 if (event_is_valid(event, vcpu)) {
551 update_total_count(kvm, event);
552 insert_to_result(&kvm->result, event,
553 kvm->compare, vcpu);
554 }
555 }
556 }
557 }
558
559 /* returns left most element of result, and erase it */
560 static struct kvm_event *pop_from_result(struct rb_root *result)
561 {
562 struct rb_node *node = rb_first(result);
563
564 if (!node)
565 return NULL;
566
567 rb_erase(node, result);
568 return container_of(node, struct kvm_event, rb);
569 }
570
571 static void print_vcpu_info(struct perf_kvm_stat *kvm)
572 {
573 int vcpu = kvm->trace_vcpu;
574
575 pr_info("Analyze events for ");
576
577 if (kvm->opts.target.system_wide)
578 pr_info("all VMs, ");
579 else if (kvm->opts.target.pid)
580 pr_info("pid(s) %s, ", kvm->opts.target.pid);
581 else
582 pr_info("dazed and confused on what is monitored, ");
583
584 if (vcpu == -1)
585 pr_info("all VCPUs:\n\n");
586 else
587 pr_info("VCPU %d:\n\n", vcpu);
588 }
589
590 static void show_timeofday(void)
591 {
592 char date[64];
593 struct timeval tv;
594 struct tm ltime;
595
596 gettimeofday(&tv, NULL);
597 if (localtime_r(&tv.tv_sec, &ltime)) {
598 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
599 pr_info("%s.%06ld", date, tv.tv_usec);
600 } else
601 pr_info("00:00:00.000000");
602
603 return;
604 }
605
606 static void print_result(struct perf_kvm_stat *kvm)
607 {
608 char decode[decode_str_len];
609 struct kvm_event *event;
610 int vcpu = kvm->trace_vcpu;
611
612 if (kvm->live) {
613 puts(CONSOLE_CLEAR);
614 show_timeofday();
615 }
616
617 pr_info("\n\n");
618 print_vcpu_info(kvm);
619 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
620 pr_info("%10s ", "Samples");
621 pr_info("%9s ", "Samples%");
622
623 pr_info("%9s ", "Time%");
624 pr_info("%11s ", "Min Time");
625 pr_info("%11s ", "Max Time");
626 pr_info("%16s ", "Avg time");
627 pr_info("\n\n");
628
629 while ((event = pop_from_result(&kvm->result))) {
630 u64 ecount, etime, max, min;
631
632 ecount = get_event_count(event, vcpu);
633 etime = get_event_time(event, vcpu);
634 max = get_event_max(event, vcpu);
635 min = get_event_min(event, vcpu);
636
637 kvm->events_ops->decode_key(kvm, &event->key, decode);
638 pr_info("%*s ", decode_str_len, decode);
639 pr_info("%10llu ", (unsigned long long)ecount);
640 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
641 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
642 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
643 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
644 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
645 kvm_event_rel_stddev(vcpu, event));
646 pr_info("\n");
647 }
648
649 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
650 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
651
652 if (kvm->lost_events)
653 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
654 }
655
656 #ifdef HAVE_TIMERFD_SUPPORT
657 static int process_lost_event(struct perf_tool *tool,
658 union perf_event *event __maybe_unused,
659 struct perf_sample *sample __maybe_unused,
660 struct machine *machine __maybe_unused)
661 {
662 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
663
664 kvm->lost_events++;
665 return 0;
666 }
667 #endif
668
669 static bool skip_sample(struct perf_kvm_stat *kvm,
670 struct perf_sample *sample)
671 {
672 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
673 return true;
674
675 return false;
676 }
677
678 static int process_sample_event(struct perf_tool *tool,
679 union perf_event *event,
680 struct perf_sample *sample,
681 struct evsel *evsel,
682 struct machine *machine)
683 {
684 int err = 0;
685 struct thread *thread;
686 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
687 tool);
688
689 if (skip_sample(kvm, sample))
690 return 0;
691
692 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
693 if (thread == NULL) {
694 pr_debug("problem processing %d event, skipping it.\n",
695 event->header.type);
696 return -1;
697 }
698
699 if (!handle_kvm_event(kvm, thread, evsel, sample))
700 err = -1;
701
702 thread__put(thread);
703 return err;
704 }
705
706 static int cpu_isa_config(struct perf_kvm_stat *kvm)
707 {
708 char buf[128], *cpuid;
709 int err;
710
711 if (kvm->live) {
712 err = get_cpuid(buf, sizeof(buf));
713 if (err != 0) {
714 pr_err("Failed to look up CPU type: %s\n",
715 str_error_r(err, buf, sizeof(buf)));
716 return -err;
717 }
718 cpuid = buf;
719 } else
720 cpuid = kvm->session->header.env.cpuid;
721
722 if (!cpuid) {
723 pr_err("Failed to look up CPU type\n");
724 return -EINVAL;
725 }
726
727 err = cpu_isa_init(kvm, cpuid);
728 if (err == -ENOTSUP)
729 pr_err("CPU %s is not supported.\n", cpuid);
730
731 return err;
732 }
733
734 static bool verify_vcpu(int vcpu)
735 {
736 if (vcpu != -1 && vcpu < 0) {
737 pr_err("Invalid vcpu:%d.\n", vcpu);
738 return false;
739 }
740
741 return true;
742 }
743
744 #ifdef HAVE_TIMERFD_SUPPORT
745 /* keeping the max events to a modest level to keep
746 * the processing of samples per mmap smooth.
747 */
748 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
749
750 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
751 u64 *mmap_time)
752 {
753 struct evlist *evlist = kvm->evlist;
754 union perf_event *event;
755 struct mmap *md;
756 u64 timestamp;
757 s64 n = 0;
758 int err;
759
760 *mmap_time = ULLONG_MAX;
761 md = &evlist->mmap[idx];
762 err = perf_mmap__read_init(&md->core);
763 if (err < 0)
764 return (err == -EAGAIN) ? 0 : -1;
765
766 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
767 err = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
768 if (err) {
769 perf_mmap__consume(&md->core);
770 pr_err("Failed to parse sample\n");
771 return -1;
772 }
773
774 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
775 /*
776 * FIXME: Here we can't consume the event, as perf_session__queue_event will
777 * point to it, and it'll get possibly overwritten by the kernel.
778 */
779 perf_mmap__consume(&md->core);
780
781 if (err) {
782 pr_err("Failed to enqueue sample: %d\n", err);
783 return -1;
784 }
785
786 /* save time stamp of our first sample for this mmap */
787 if (n == 0)
788 *mmap_time = timestamp;
789
790 /* limit events per mmap handled all at once */
791 n++;
792 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
793 break;
794 }
795
796 perf_mmap__read_done(&md->core);
797 return n;
798 }
799
800 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
801 {
802 int i, err, throttled = 0;
803 s64 n, ntotal = 0;
804 u64 flush_time = ULLONG_MAX, mmap_time;
805
806 for (i = 0; i < kvm->evlist->core.nr_mmaps; i++) {
807 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
808 if (n < 0)
809 return -1;
810
811 /* flush time is going to be the minimum of all the individual
812 * mmap times. Essentially, we flush all the samples queued up
813 * from the last pass under our minimal start time -- that leaves
814 * a very small race for samples to come in with a lower timestamp.
815 * The ioctl to return the perf_clock timestamp should close the
816 * race entirely.
817 */
818 if (mmap_time < flush_time)
819 flush_time = mmap_time;
820
821 ntotal += n;
822 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
823 throttled = 1;
824 }
825
826 /* flush queue after each round in which we processed events */
827 if (ntotal) {
828 struct ordered_events *oe = &kvm->session->ordered_events;
829
830 oe->next_flush = flush_time;
831 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
832 if (err) {
833 if (kvm->lost_events)
834 pr_info("\nLost events: %" PRIu64 "\n\n",
835 kvm->lost_events);
836 return err;
837 }
838 }
839
840 return throttled;
841 }
842
843 static volatile int done;
844
845 static void sig_handler(int sig __maybe_unused)
846 {
847 done = 1;
848 }
849
850 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
851 {
852 struct itimerspec new_value;
853 int rc = -1;
854
855 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
856 if (kvm->timerfd < 0) {
857 pr_err("timerfd_create failed\n");
858 goto out;
859 }
860
861 new_value.it_value.tv_sec = kvm->display_time;
862 new_value.it_value.tv_nsec = 0;
863 new_value.it_interval.tv_sec = kvm->display_time;
864 new_value.it_interval.tv_nsec = 0;
865
866 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
867 pr_err("timerfd_settime failed: %d\n", errno);
868 close(kvm->timerfd);
869 goto out;
870 }
871
872 rc = 0;
873 out:
874 return rc;
875 }
876
877 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
878 {
879 uint64_t c;
880 int rc;
881
882 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
883 if (rc < 0) {
884 if (errno == EAGAIN)
885 return 0;
886
887 pr_err("Failed to read timer fd: %d\n", errno);
888 return -1;
889 }
890
891 if (rc != sizeof(uint64_t)) {
892 pr_err("Error reading timer fd - invalid size returned\n");
893 return -1;
894 }
895
896 if (c != 1)
897 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
898
899 /* update display */
900 sort_result(kvm);
901 print_result(kvm);
902
903 /* reset counts */
904 clear_events_cache_stats(kvm->kvm_events_cache);
905 kvm->total_count = 0;
906 kvm->total_time = 0;
907 kvm->lost_events = 0;
908
909 return 0;
910 }
911
912 static int fd_set_nonblock(int fd)
913 {
914 long arg = 0;
915
916 arg = fcntl(fd, F_GETFL);
917 if (arg < 0) {
918 pr_err("Failed to get current flags for fd %d\n", fd);
919 return -1;
920 }
921
922 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
923 pr_err("Failed to set non-block option on fd %d\n", fd);
924 return -1;
925 }
926
927 return 0;
928 }
929
930 static int perf_kvm__handle_stdin(void)
931 {
932 int c;
933
934 c = getc(stdin);
935 if (c == 'q')
936 return 1;
937
938 return 0;
939 }
940
941 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
942 {
943 int nr_stdin, ret, err = -EINVAL;
944 struct termios save;
945
946 /* live flag must be set first */
947 kvm->live = true;
948
949 ret = cpu_isa_config(kvm);
950 if (ret < 0)
951 return ret;
952
953 if (!verify_vcpu(kvm->trace_vcpu) ||
954 !select_key(kvm) ||
955 !register_kvm_events_ops(kvm)) {
956 goto out;
957 }
958
959 set_term_quiet_input(&save);
960 init_kvm_event_record(kvm);
961
962 signal(SIGINT, sig_handler);
963 signal(SIGTERM, sig_handler);
964
965 /* add timer fd */
966 if (perf_kvm__timerfd_create(kvm) < 0) {
967 err = -1;
968 goto out;
969 }
970
971 if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
972 goto out;
973
974 nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin));
975 if (nr_stdin < 0)
976 goto out;
977
978 if (fd_set_nonblock(fileno(stdin)) != 0)
979 goto out;
980
981 /* everything is good - enable the events and process */
982 evlist__enable(kvm->evlist);
983
984 while (!done) {
985 struct fdarray *fda = &kvm->evlist->core.pollfd;
986 int rc;
987
988 rc = perf_kvm__mmap_read(kvm);
989 if (rc < 0)
990 break;
991
992 err = perf_kvm__handle_timerfd(kvm);
993 if (err)
994 goto out;
995
996 if (fda->entries[nr_stdin].revents & POLLIN)
997 done = perf_kvm__handle_stdin();
998
999 if (!rc && !done)
1000 err = evlist__poll(kvm->evlist, 100);
1001 }
1002
1003 evlist__disable(kvm->evlist);
1004
1005 if (err == 0) {
1006 sort_result(kvm);
1007 print_result(kvm);
1008 }
1009
1010 out:
1011 if (kvm->timerfd >= 0)
1012 close(kvm->timerfd);
1013
1014 tcsetattr(0, TCSAFLUSH, &save);
1015 return err;
1016 }
1017
1018 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1019 {
1020 int err, rc = -1;
1021 struct evsel *pos;
1022 struct evlist *evlist = kvm->evlist;
1023 char sbuf[STRERR_BUFSIZE];
1024
1025 perf_evlist__config(evlist, &kvm->opts, NULL);
1026
1027 /*
1028 * Note: exclude_{guest,host} do not apply here.
1029 * This command processes KVM tracepoints from host only
1030 */
1031 evlist__for_each_entry(evlist, pos) {
1032 struct perf_event_attr *attr = &pos->core.attr;
1033
1034 /* make sure these *are* set */
1035 evsel__set_sample_bit(pos, TID);
1036 evsel__set_sample_bit(pos, TIME);
1037 evsel__set_sample_bit(pos, CPU);
1038 evsel__set_sample_bit(pos, RAW);
1039 /* make sure these are *not*; want as small a sample as possible */
1040 evsel__reset_sample_bit(pos, PERIOD);
1041 evsel__reset_sample_bit(pos, IP);
1042 evsel__reset_sample_bit(pos, CALLCHAIN);
1043 evsel__reset_sample_bit(pos, ADDR);
1044 evsel__reset_sample_bit(pos, READ);
1045 attr->mmap = 0;
1046 attr->comm = 0;
1047 attr->task = 0;
1048
1049 attr->sample_period = 1;
1050
1051 attr->watermark = 0;
1052 attr->wakeup_events = 1000;
1053
1054 /* will enable all once we are ready */
1055 attr->disabled = 1;
1056 }
1057
1058 err = evlist__open(evlist);
1059 if (err < 0) {
1060 printf("Couldn't create the events: %s\n",
1061 str_error_r(errno, sbuf, sizeof(sbuf)));
1062 goto out;
1063 }
1064
1065 if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1066 ui__error("Failed to mmap the events: %s\n",
1067 str_error_r(errno, sbuf, sizeof(sbuf)));
1068 evlist__close(evlist);
1069 goto out;
1070 }
1071
1072 rc = 0;
1073
1074 out:
1075 return rc;
1076 }
1077 #endif
1078
1079 static int read_events(struct perf_kvm_stat *kvm)
1080 {
1081 int ret;
1082
1083 struct perf_tool eops = {
1084 .sample = process_sample_event,
1085 .comm = perf_event__process_comm,
1086 .namespaces = perf_event__process_namespaces,
1087 .ordered_events = true,
1088 };
1089 struct perf_data file = {
1090 .path = kvm->file_name,
1091 .mode = PERF_DATA_MODE_READ,
1092 .force = kvm->force,
1093 };
1094
1095 kvm->tool = eops;
1096 kvm->session = perf_session__new(&file, false, &kvm->tool);
1097 if (IS_ERR(kvm->session)) {
1098 pr_err("Initializing perf session failed\n");
1099 return PTR_ERR(kvm->session);
1100 }
1101
1102 symbol__init(&kvm->session->header.env);
1103
1104 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1105 ret = -EINVAL;
1106 goto out_delete;
1107 }
1108
1109 /*
1110 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1111 * traced in the old kernel.
1112 */
1113 ret = cpu_isa_config(kvm);
1114 if (ret < 0)
1115 goto out_delete;
1116
1117 ret = perf_session__process_events(kvm->session);
1118
1119 out_delete:
1120 perf_session__delete(kvm->session);
1121 return ret;
1122 }
1123
1124 static int parse_target_str(struct perf_kvm_stat *kvm)
1125 {
1126 if (kvm->opts.target.pid) {
1127 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1128 if (kvm->pid_list == NULL) {
1129 pr_err("Error parsing process id string\n");
1130 return -EINVAL;
1131 }
1132 }
1133
1134 return 0;
1135 }
1136
1137 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1138 {
1139 int ret = -EINVAL;
1140 int vcpu = kvm->trace_vcpu;
1141
1142 if (parse_target_str(kvm) != 0)
1143 goto exit;
1144
1145 if (!verify_vcpu(vcpu))
1146 goto exit;
1147
1148 if (!select_key(kvm))
1149 goto exit;
1150
1151 if (!register_kvm_events_ops(kvm))
1152 goto exit;
1153
1154 init_kvm_event_record(kvm);
1155 setup_pager();
1156
1157 ret = read_events(kvm);
1158 if (ret)
1159 goto exit;
1160
1161 sort_result(kvm);
1162 print_result(kvm);
1163
1164 exit:
1165 return ret;
1166 }
1167
1168 #define STRDUP_FAIL_EXIT(s) \
1169 ({ char *_p; \
1170 _p = strdup(s); \
1171 if (!_p) \
1172 return -ENOMEM; \
1173 _p; \
1174 })
1175
1176 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1177 {
1178 return 0;
1179 }
1180
1181 static int
1182 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1183 {
1184 unsigned int rec_argc, i, j, events_tp_size;
1185 const char **rec_argv;
1186 const char * const record_args[] = {
1187 "record",
1188 "-R",
1189 "-m", "1024",
1190 "-c", "1",
1191 };
1192 const char * const kvm_stat_record_usage[] = {
1193 "perf kvm stat record [<options>]",
1194 NULL
1195 };
1196 const char * const *events_tp;
1197 int ret;
1198
1199 events_tp_size = 0;
1200 ret = setup_kvm_events_tp(kvm);
1201 if (ret < 0) {
1202 pr_err("Unable to setup the kvm tracepoints\n");
1203 return ret;
1204 }
1205
1206 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1207 events_tp_size++;
1208
1209 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1210 2 * events_tp_size;
1211 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1212
1213 if (rec_argv == NULL)
1214 return -ENOMEM;
1215
1216 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1217 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1218
1219 for (j = 0; j < events_tp_size; j++) {
1220 rec_argv[i++] = "-e";
1221 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1222 }
1223
1224 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1225 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1226
1227 for (j = 1; j < (unsigned int)argc; j++, i++)
1228 rec_argv[i] = argv[j];
1229
1230 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1231 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1232 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1233
1234 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1244 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1245 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1246 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1247 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1248 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1249
1250 record_usage = kvm_stat_record_usage;
1251 return cmd_record(i, rec_argv);
1252 }
1253
1254 static int
1255 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1256 {
1257 const struct option kvm_events_report_options[] = {
1258 OPT_STRING(0, "event", &kvm->report_event, "report event",
1259 "event for reporting: vmexit, "
1260 "mmio (x86 only), ioport (x86 only)"),
1261 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1262 "vcpu id to report"),
1263 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1264 "key for sorting: sample(sort by samples number)"
1265 " time (sort by avg time)"),
1266 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1267 "analyze events only for given process id(s)"),
1268 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1269 OPT_END()
1270 };
1271
1272 const char * const kvm_events_report_usage[] = {
1273 "perf kvm stat report [<options>]",
1274 NULL
1275 };
1276
1277 if (argc) {
1278 argc = parse_options(argc, argv,
1279 kvm_events_report_options,
1280 kvm_events_report_usage, 0);
1281 if (argc)
1282 usage_with_options(kvm_events_report_usage,
1283 kvm_events_report_options);
1284 }
1285
1286 if (!kvm->opts.target.pid)
1287 kvm->opts.target.system_wide = true;
1288
1289 return kvm_events_report_vcpu(kvm);
1290 }
1291
1292 #ifdef HAVE_TIMERFD_SUPPORT
1293 static struct evlist *kvm_live_event_list(void)
1294 {
1295 struct evlist *evlist;
1296 char *tp, *name, *sys;
1297 int err = -1;
1298 const char * const *events_tp;
1299
1300 evlist = evlist__new();
1301 if (evlist == NULL)
1302 return NULL;
1303
1304 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1305
1306 tp = strdup(*events_tp);
1307 if (tp == NULL)
1308 goto out;
1309
1310 /* split tracepoint into subsystem and name */
1311 sys = tp;
1312 name = strchr(tp, ':');
1313 if (name == NULL) {
1314 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1315 *events_tp);
1316 free(tp);
1317 goto out;
1318 }
1319 *name = '\0';
1320 name++;
1321
1322 if (evlist__add_newtp(evlist, sys, name, NULL)) {
1323 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1324 free(tp);
1325 goto out;
1326 }
1327
1328 free(tp);
1329 }
1330
1331 err = 0;
1332
1333 out:
1334 if (err) {
1335 evlist__delete(evlist);
1336 evlist = NULL;
1337 }
1338
1339 return evlist;
1340 }
1341
1342 static int kvm_events_live(struct perf_kvm_stat *kvm,
1343 int argc, const char **argv)
1344 {
1345 char errbuf[BUFSIZ];
1346 int err;
1347
1348 const struct option live_options[] = {
1349 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1350 "record events on existing process id"),
1351 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1352 "number of mmap data pages",
1353 perf_evlist__parse_mmap_pages),
1354 OPT_INCR('v', "verbose", &verbose,
1355 "be more verbose (show counter open errors, etc)"),
1356 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1357 "system-wide collection from all CPUs"),
1358 OPT_UINTEGER('d', "display", &kvm->display_time,
1359 "time in seconds between display updates"),
1360 OPT_STRING(0, "event", &kvm->report_event, "report event",
1361 "event for reporting: "
1362 "vmexit, mmio (x86 only), ioport (x86 only)"),
1363 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1364 "vcpu id to report"),
1365 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1366 "key for sorting: sample(sort by samples number)"
1367 " time (sort by avg time)"),
1368 OPT_U64(0, "duration", &kvm->duration,
1369 "show events other than"
1370 " HLT (x86 only) or Wait state (s390 only)"
1371 " that take longer than duration usecs"),
1372 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1373 "per thread proc mmap processing timeout in ms"),
1374 OPT_END()
1375 };
1376 const char * const live_usage[] = {
1377 "perf kvm stat live [<options>]",
1378 NULL
1379 };
1380 struct perf_data data = {
1381 .mode = PERF_DATA_MODE_WRITE,
1382 };
1383
1384
1385 /* event handling */
1386 kvm->tool.sample = process_sample_event;
1387 kvm->tool.comm = perf_event__process_comm;
1388 kvm->tool.exit = perf_event__process_exit;
1389 kvm->tool.fork = perf_event__process_fork;
1390 kvm->tool.lost = process_lost_event;
1391 kvm->tool.namespaces = perf_event__process_namespaces;
1392 kvm->tool.ordered_events = true;
1393 perf_tool__fill_defaults(&kvm->tool);
1394
1395 /* set defaults */
1396 kvm->display_time = 1;
1397 kvm->opts.user_interval = 1;
1398 kvm->opts.mmap_pages = 512;
1399 kvm->opts.target.uses_mmap = false;
1400 kvm->opts.target.uid_str = NULL;
1401 kvm->opts.target.uid = UINT_MAX;
1402
1403 symbol__init(NULL);
1404 disable_buildid_cache();
1405
1406 use_browser = 0;
1407
1408 if (argc) {
1409 argc = parse_options(argc, argv, live_options,
1410 live_usage, 0);
1411 if (argc)
1412 usage_with_options(live_usage, live_options);
1413 }
1414
1415 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1416
1417 /*
1418 * target related setups
1419 */
1420 err = target__validate(&kvm->opts.target);
1421 if (err) {
1422 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1423 ui__warning("%s", errbuf);
1424 }
1425
1426 if (target__none(&kvm->opts.target))
1427 kvm->opts.target.system_wide = true;
1428
1429
1430 /*
1431 * generate the event list
1432 */
1433 err = setup_kvm_events_tp(kvm);
1434 if (err < 0) {
1435 pr_err("Unable to setup the kvm tracepoints\n");
1436 return err;
1437 }
1438
1439 kvm->evlist = kvm_live_event_list();
1440 if (kvm->evlist == NULL) {
1441 err = -1;
1442 goto out;
1443 }
1444
1445 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1446 usage_with_options(live_usage, live_options);
1447
1448 /*
1449 * perf session
1450 */
1451 kvm->session = perf_session__new(&data, false, &kvm->tool);
1452 if (IS_ERR(kvm->session)) {
1453 err = PTR_ERR(kvm->session);
1454 goto out;
1455 }
1456 kvm->session->evlist = kvm->evlist;
1457 perf_session__set_id_hdr_size(kvm->session);
1458 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1459 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1460 kvm->evlist->core.threads, false, 1);
1461 err = kvm_live_open_events(kvm);
1462 if (err)
1463 goto out;
1464
1465 err = kvm_events_live_report(kvm);
1466
1467 out:
1468 perf_session__delete(kvm->session);
1469 kvm->session = NULL;
1470 evlist__delete(kvm->evlist);
1471
1472 return err;
1473 }
1474 #endif
1475
1476 static void print_kvm_stat_usage(void)
1477 {
1478 printf("Usage: perf kvm stat <command>\n\n");
1479
1480 printf("# Available commands:\n");
1481 printf("\trecord: record kvm events\n");
1482 printf("\treport: report statistical data of kvm events\n");
1483 printf("\tlive: live reporting of statistical data of kvm events\n");
1484
1485 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1486 }
1487
1488 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1489 {
1490 struct perf_kvm_stat kvm = {
1491 .file_name = file_name,
1492
1493 .trace_vcpu = -1,
1494 .report_event = "vmexit",
1495 .sort_key = "sample",
1496
1497 };
1498
1499 if (argc == 1) {
1500 print_kvm_stat_usage();
1501 goto perf_stat;
1502 }
1503
1504 if (!strncmp(argv[1], "rec", 3))
1505 return kvm_events_record(&kvm, argc - 1, argv + 1);
1506
1507 if (!strncmp(argv[1], "rep", 3))
1508 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1509
1510 #ifdef HAVE_TIMERFD_SUPPORT
1511 if (!strncmp(argv[1], "live", 4))
1512 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1513 #endif
1514
1515 perf_stat:
1516 return cmd_stat(argc, argv);
1517 }
1518 #endif /* HAVE_KVM_STAT_SUPPORT */
1519
1520 int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
1521 const char **argv __maybe_unused)
1522 {
1523 return 0;
1524 }
1525
1526 static int __cmd_record(const char *file_name, int argc, const char **argv)
1527 {
1528 int rec_argc, i = 0, j, ret;
1529 const char **rec_argv;
1530
1531 ret = kvm_add_default_arch_event(&argc, argv);
1532 if (ret)
1533 return -EINVAL;
1534
1535 rec_argc = argc + 2;
1536 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1537 rec_argv[i++] = strdup("record");
1538 rec_argv[i++] = strdup("-o");
1539 rec_argv[i++] = strdup(file_name);
1540 for (j = 1; j < argc; j++, i++)
1541 rec_argv[i] = argv[j];
1542
1543 BUG_ON(i != rec_argc);
1544
1545 return cmd_record(i, rec_argv);
1546 }
1547
1548 static int __cmd_report(const char *file_name, int argc, const char **argv)
1549 {
1550 int rec_argc, i = 0, j;
1551 const char **rec_argv;
1552
1553 rec_argc = argc + 2;
1554 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1555 rec_argv[i++] = strdup("report");
1556 rec_argv[i++] = strdup("-i");
1557 rec_argv[i++] = strdup(file_name);
1558 for (j = 1; j < argc; j++, i++)
1559 rec_argv[i] = argv[j];
1560
1561 BUG_ON(i != rec_argc);
1562
1563 return cmd_report(i, rec_argv);
1564 }
1565
1566 static int
1567 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1568 {
1569 int rec_argc, i = 0, j;
1570 const char **rec_argv;
1571
1572 rec_argc = argc + 2;
1573 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1574 rec_argv[i++] = strdup("buildid-list");
1575 rec_argv[i++] = strdup("-i");
1576 rec_argv[i++] = strdup(file_name);
1577 for (j = 1; j < argc; j++, i++)
1578 rec_argv[i] = argv[j];
1579
1580 BUG_ON(i != rec_argc);
1581
1582 return cmd_buildid_list(i, rec_argv);
1583 }
1584
1585 int cmd_kvm(int argc, const char **argv)
1586 {
1587 const char *file_name = NULL;
1588 const struct option kvm_options[] = {
1589 OPT_STRING('i', "input", &file_name, "file",
1590 "Input file name"),
1591 OPT_STRING('o', "output", &file_name, "file",
1592 "Output file name"),
1593 OPT_BOOLEAN(0, "guest", &perf_guest,
1594 "Collect guest os data"),
1595 OPT_BOOLEAN(0, "host", &perf_host,
1596 "Collect host os data"),
1597 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1598 "guest mount directory under which every guest os"
1599 " instance has a subdir"),
1600 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1601 "file", "file saving guest os vmlinux"),
1602 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1603 "file", "file saving guest os /proc/kallsyms"),
1604 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1605 "file", "file saving guest os /proc/modules"),
1606 OPT_INCR('v', "verbose", &verbose,
1607 "be more verbose (show counter open errors, etc)"),
1608 OPT_END()
1609 };
1610
1611 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1612 "buildid-list", "stat", NULL };
1613 const char *kvm_usage[] = { NULL, NULL };
1614
1615 perf_host = 0;
1616 perf_guest = 1;
1617
1618 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1619 PARSE_OPT_STOP_AT_NON_OPTION);
1620 if (!argc)
1621 usage_with_options(kvm_usage, kvm_options);
1622
1623 if (!perf_host)
1624 perf_guest = 1;
1625
1626 if (!file_name) {
1627 file_name = get_filename_for_perf_kvm();
1628
1629 if (!file_name) {
1630 pr_err("Failed to allocate memory for filename\n");
1631 return -ENOMEM;
1632 }
1633 }
1634
1635 if (!strncmp(argv[0], "rec", 3))
1636 return __cmd_record(file_name, argc, argv);
1637 else if (!strncmp(argv[0], "rep", 3))
1638 return __cmd_report(file_name, argc, argv);
1639 else if (!strncmp(argv[0], "diff", 4))
1640 return cmd_diff(argc, argv);
1641 else if (!strncmp(argv[0], "top", 3))
1642 return cmd_top(argc, argv);
1643 else if (!strncmp(argv[0], "buildid-list", 12))
1644 return __cmd_buildid_list(file_name, argc, argv);
1645 #ifdef HAVE_KVM_STAT_SUPPORT
1646 else if (!strncmp(argv[0], "stat", 4))
1647 return kvm_cmd_stat(file_name, argc, argv);
1648 #endif
1649 else
1650 usage_with_options(kvm_usage, kvm_options);
1651
1652 return 0;
1653 }
Linux with added FPC-III support