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hwmon: (emcw201) Fix overflows seen when writing into limit attributes
[linux-2.6/btrfs-unstable.git] / tools / perf / builtin-kvm.c
blob08fa88f62a246f4f309410da45379aa21949f14e
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/evsel.h"
5 #include "util/evlist.h"
6 #include "util/util.h"
7 #include "util/cache.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11 #include "util/session.h"
12 #include "util/intlist.h"
13 #include <subcmd/parse-options.h>
14 #include "util/trace-event.h"
15 #include "util/debug.h"
16 #include "util/tool.h"
17 #include "util/stat.h"
18 #include "util/top.h"
19 #include "util/data.h"
20 #include "util/ordered-events.h"
21
22 #include <sys/prctl.h>
23 #ifdef HAVE_TIMERFD_SUPPORT
24 #include <sys/timerfd.h>
25 #endif
26
27 #include <linux/time64.h>
28 #include <termios.h>
29 #include <semaphore.h>
30 #include <pthread.h>
31 #include <math.h>
32
33 #ifdef HAVE_KVM_STAT_SUPPORT
34 #include "util/kvm-stat.h"
35
36 void exit_event_get_key(struct perf_evsel *evsel,
37 struct perf_sample *sample,
38 struct event_key *key)
39 {
40 key->info = 0;
41 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
42 }
43
44 bool kvm_exit_event(struct perf_evsel *evsel)
45 {
46 return !strcmp(evsel->name, kvm_exit_trace);
47 }
48
49 bool exit_event_begin(struct perf_evsel *evsel,
50 struct perf_sample *sample, struct event_key *key)
51 {
52 if (kvm_exit_event(evsel)) {
53 exit_event_get_key(evsel, sample, key);
54 return true;
55 }
56
57 return false;
58 }
59
60 bool kvm_entry_event(struct perf_evsel *evsel)
61 {
62 return !strcmp(evsel->name, kvm_entry_trace);
63 }
64
65 bool exit_event_end(struct perf_evsel *evsel,
66 struct perf_sample *sample __maybe_unused,
67 struct event_key *key __maybe_unused)
68 {
69 return kvm_entry_event(evsel);
70 }
71
72 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
73 struct exit_reasons_table *tbl,
74 u64 exit_code)
75 {
76 while (tbl->reason != NULL) {
77 if (tbl->exit_code == exit_code)
78 return tbl->reason;
79 tbl++;
80 }
81
82 pr_err("unknown kvm exit code:%lld on %s\n",
83 (unsigned long long)exit_code, kvm->exit_reasons_isa);
84 return "UNKNOWN";
85 }
86
87 void exit_event_decode_key(struct perf_kvm_stat *kvm,
88 struct event_key *key,
89 char *decode)
90 {
91 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
92 key->key);
93
94 scnprintf(decode, decode_str_len, "%s", exit_reason);
95 }
96
97 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
98 {
99 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
100
101 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
102 if (!strcmp(events_ops->name, kvm->report_event)) {
103 kvm->events_ops = events_ops->ops;
104 return true;
105 }
106 }
107
108 return false;
109 }
110
111 struct vcpu_event_record {
112 int vcpu_id;
113 u64 start_time;
114 struct kvm_event *last_event;
115 };
116
117
118 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
119 {
120 unsigned int i;
121
122 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
123 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
124 }
125
126 #ifdef HAVE_TIMERFD_SUPPORT
127 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
128 {
129 struct list_head *head;
130 struct kvm_event *event;
131 unsigned int i;
132 int j;
133
134 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
135 head = &kvm_events_cache[i];
136 list_for_each_entry(event, head, hash_entry) {
137 /* reset stats for event */
138 event->total.time = 0;
139 init_stats(&event->total.stats);
140
141 for (j = 0; j < event->max_vcpu; ++j) {
142 event->vcpu[j].time = 0;
143 init_stats(&event->vcpu[j].stats);
144 }
145 }
146 }
147 }
148 #endif
149
150 static int kvm_events_hash_fn(u64 key)
151 {
152 return key & (EVENTS_CACHE_SIZE - 1);
153 }
154
155 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
156 {
157 int old_max_vcpu = event->max_vcpu;
158 void *prev;
159
160 if (vcpu_id < event->max_vcpu)
161 return true;
162
163 while (event->max_vcpu <= vcpu_id)
164 event->max_vcpu += DEFAULT_VCPU_NUM;
165
166 prev = event->vcpu;
167 event->vcpu = realloc(event->vcpu,
168 event->max_vcpu * sizeof(*event->vcpu));
169 if (!event->vcpu) {
170 free(prev);
171 pr_err("Not enough memory\n");
172 return false;
173 }
174
175 memset(event->vcpu + old_max_vcpu, 0,
176 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
177 return true;
178 }
179
180 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
181 {
182 struct kvm_event *event;
183
184 event = zalloc(sizeof(*event));
185 if (!event) {
186 pr_err("Not enough memory\n");
187 return NULL;
188 }
189
190 event->key = *key;
191 init_stats(&event->total.stats);
192 return event;
193 }
194
195 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
196 struct event_key *key)
197 {
198 struct kvm_event *event;
199 struct list_head *head;
200
201 BUG_ON(key->key == INVALID_KEY);
202
203 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
204 list_for_each_entry(event, head, hash_entry) {
205 if (event->key.key == key->key && event->key.info == key->info)
206 return event;
207 }
208
209 event = kvm_alloc_init_event(key);
210 if (!event)
211 return NULL;
212
213 list_add(&event->hash_entry, head);
214 return event;
215 }
216
217 static bool handle_begin_event(struct perf_kvm_stat *kvm,
218 struct vcpu_event_record *vcpu_record,
219 struct event_key *key, u64 timestamp)
220 {
221 struct kvm_event *event = NULL;
222
223 if (key->key != INVALID_KEY)
224 event = find_create_kvm_event(kvm, key);
225
226 vcpu_record->last_event = event;
227 vcpu_record->start_time = timestamp;
228 return true;
229 }
230
231 static void
232 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
233 {
234 kvm_stats->time += time_diff;
235 update_stats(&kvm_stats->stats, time_diff);
236 }
237
238 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
239 {
240 struct kvm_event_stats *kvm_stats = &event->total;
241
242 if (vcpu_id != -1)
243 kvm_stats = &event->vcpu[vcpu_id];
244
245 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
246 avg_stats(&kvm_stats->stats));
247 }
248
249 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
250 u64 time_diff)
251 {
252 if (vcpu_id == -1) {
253 kvm_update_event_stats(&event->total, time_diff);
254 return true;
255 }
256
257 if (!kvm_event_expand(event, vcpu_id))
258 return false;
259
260 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
261 return true;
262 }
263
264 static bool is_child_event(struct perf_kvm_stat *kvm,
265 struct perf_evsel *evsel,
266 struct perf_sample *sample,
267 struct event_key *key)
268 {
269 struct child_event_ops *child_ops;
270
271 child_ops = kvm->events_ops->child_ops;
272
273 if (!child_ops)
274 return false;
275
276 for (; child_ops->name; child_ops++) {
277 if (!strcmp(evsel->name, child_ops->name)) {
278 child_ops->get_key(evsel, sample, key);
279 return true;
280 }
281 }
282
283 return false;
284 }
285
286 static bool handle_child_event(struct perf_kvm_stat *kvm,
287 struct vcpu_event_record *vcpu_record,
288 struct event_key *key,
289 struct perf_sample *sample __maybe_unused)
290 {
291 struct kvm_event *event = NULL;
292
293 if (key->key != INVALID_KEY)
294 event = find_create_kvm_event(kvm, key);
295
296 vcpu_record->last_event = event;
297
298 return true;
299 }
300
301 static bool skip_event(const char *event)
302 {
303 const char * const *skip_events;
304
305 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
306 if (!strcmp(event, *skip_events))
307 return true;
308
309 return false;
310 }
311
312 static bool handle_end_event(struct perf_kvm_stat *kvm,
313 struct vcpu_event_record *vcpu_record,
314 struct event_key *key,
315 struct perf_sample *sample)
316 {
317 struct kvm_event *event;
318 u64 time_begin, time_diff;
319 int vcpu;
320
321 if (kvm->trace_vcpu == -1)
322 vcpu = -1;
323 else
324 vcpu = vcpu_record->vcpu_id;
325
326 event = vcpu_record->last_event;
327 time_begin = vcpu_record->start_time;
328
329 /* The begin event is not caught. */
330 if (!time_begin)
331 return true;
332
333 /*
334 * In some case, the 'begin event' only records the start timestamp,
335 * the actual event is recognized in the 'end event' (e.g. mmio-event).
336 */
337
338 /* Both begin and end events did not get the key. */
339 if (!event && key->key == INVALID_KEY)
340 return true;
341
342 if (!event)
343 event = find_create_kvm_event(kvm, key);
344
345 if (!event)
346 return false;
347
348 vcpu_record->last_event = NULL;
349 vcpu_record->start_time = 0;
350
351 /* seems to happen once in a while during live mode */
352 if (sample->time < time_begin) {
353 pr_debug("End time before begin time; skipping event.\n");
354 return true;
355 }
356
357 time_diff = sample->time - time_begin;
358
359 if (kvm->duration && time_diff > kvm->duration) {
360 char decode[decode_str_len];
361
362 kvm->events_ops->decode_key(kvm, &event->key, decode);
363 if (!skip_event(decode)) {
364 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
365 sample->time, sample->pid, vcpu_record->vcpu_id,
366 decode, time_diff / NSEC_PER_USEC);
367 }
368 }
369
370 return update_kvm_event(event, vcpu, time_diff);
371 }
372
373 static
374 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
375 struct perf_evsel *evsel,
376 struct perf_sample *sample)
377 {
378 /* Only kvm_entry records vcpu id. */
379 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
380 struct vcpu_event_record *vcpu_record;
381
382 vcpu_record = zalloc(sizeof(*vcpu_record));
383 if (!vcpu_record) {
384 pr_err("%s: Not enough memory\n", __func__);
385 return NULL;
386 }
387
388 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
389 vcpu_id_str);
390 thread__set_priv(thread, vcpu_record);
391 }
392
393 return thread__priv(thread);
394 }
395
396 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
397 struct thread *thread,
398 struct perf_evsel *evsel,
399 struct perf_sample *sample)
400 {
401 struct vcpu_event_record *vcpu_record;
402 struct event_key key = { .key = INVALID_KEY,
403 .exit_reasons = kvm->exit_reasons };
404
405 vcpu_record = per_vcpu_record(thread, evsel, sample);
406 if (!vcpu_record)
407 return true;
408
409 /* only process events for vcpus user cares about */
410 if ((kvm->trace_vcpu != -1) &&
411 (kvm->trace_vcpu != vcpu_record->vcpu_id))
412 return true;
413
414 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
415 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
416
417 if (is_child_event(kvm, evsel, sample, &key))
418 return handle_child_event(kvm, vcpu_record, &key, sample);
419
420 if (kvm->events_ops->is_end_event(evsel, sample, &key))
421 return handle_end_event(kvm, vcpu_record, &key, sample);
422
423 return true;
424 }
425
426 #define GET_EVENT_KEY(func, field) \
427 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
428 { \
429 if (vcpu == -1) \
430 return event->total.field; \
431 \
432 if (vcpu >= event->max_vcpu) \
433 return 0; \
434 \
435 return event->vcpu[vcpu].field; \
436 }
437
438 #define COMPARE_EVENT_KEY(func, field) \
439 GET_EVENT_KEY(func, field) \
440 static int compare_kvm_event_ ## func(struct kvm_event *one, \
441 struct kvm_event *two, int vcpu)\
442 { \
443 return get_event_ ##func(one, vcpu) > \
444 get_event_ ##func(two, vcpu); \
445 }
446
447 GET_EVENT_KEY(time, time);
448 COMPARE_EVENT_KEY(count, stats.n);
449 COMPARE_EVENT_KEY(mean, stats.mean);
450 GET_EVENT_KEY(max, stats.max);
451 GET_EVENT_KEY(min, stats.min);
452
453 #define DEF_SORT_NAME_KEY(name, compare_key) \
454 { #name, compare_kvm_event_ ## compare_key }
455
456 static struct kvm_event_key keys[] = {
457 DEF_SORT_NAME_KEY(sample, count),
458 DEF_SORT_NAME_KEY(time, mean),
459 { NULL, NULL }
460 };
461
462 static bool select_key(struct perf_kvm_stat *kvm)
463 {
464 int i;
465
466 for (i = 0; keys[i].name; i++) {
467 if (!strcmp(keys[i].name, kvm->sort_key)) {
468 kvm->compare = keys[i].key;
469 return true;
470 }
471 }
472
473 pr_err("Unknown compare key:%s\n", kvm->sort_key);
474 return false;
475 }
476
477 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
478 key_cmp_fun bigger, int vcpu)
479 {
480 struct rb_node **rb = &result->rb_node;
481 struct rb_node *parent = NULL;
482 struct kvm_event *p;
483
484 while (*rb) {
485 p = container_of(*rb, struct kvm_event, rb);
486 parent = *rb;
487
488 if (bigger(event, p, vcpu))
489 rb = &(*rb)->rb_left;
490 else
491 rb = &(*rb)->rb_right;
492 }
493
494 rb_link_node(&event->rb, parent, rb);
495 rb_insert_color(&event->rb, result);
496 }
497
498 static void
499 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
500 {
501 int vcpu = kvm->trace_vcpu;
502
503 kvm->total_count += get_event_count(event, vcpu);
504 kvm->total_time += get_event_time(event, vcpu);
505 }
506
507 static bool event_is_valid(struct kvm_event *event, int vcpu)
508 {
509 return !!get_event_count(event, vcpu);
510 }
511
512 static void sort_result(struct perf_kvm_stat *kvm)
513 {
514 unsigned int i;
515 int vcpu = kvm->trace_vcpu;
516 struct kvm_event *event;
517
518 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
519 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
520 if (event_is_valid(event, vcpu)) {
521 update_total_count(kvm, event);
522 insert_to_result(&kvm->result, event,
523 kvm->compare, vcpu);
524 }
525 }
526 }
527 }
528
529 /* returns left most element of result, and erase it */
530 static struct kvm_event *pop_from_result(struct rb_root *result)
531 {
532 struct rb_node *node = rb_first(result);
533
534 if (!node)
535 return NULL;
536
537 rb_erase(node, result);
538 return container_of(node, struct kvm_event, rb);
539 }
540
541 static void print_vcpu_info(struct perf_kvm_stat *kvm)
542 {
543 int vcpu = kvm->trace_vcpu;
544
545 pr_info("Analyze events for ");
546
547 if (kvm->opts.target.system_wide)
548 pr_info("all VMs, ");
549 else if (kvm->opts.target.pid)
550 pr_info("pid(s) %s, ", kvm->opts.target.pid);
551 else
552 pr_info("dazed and confused on what is monitored, ");
553
554 if (vcpu == -1)
555 pr_info("all VCPUs:\n\n");
556 else
557 pr_info("VCPU %d:\n\n", vcpu);
558 }
559
560 static void show_timeofday(void)
561 {
562 char date[64];
563 struct timeval tv;
564 struct tm ltime;
565
566 gettimeofday(&tv, NULL);
567 if (localtime_r(&tv.tv_sec, &ltime)) {
568 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
569 pr_info("%s.%06ld", date, tv.tv_usec);
570 } else
571 pr_info("00:00:00.000000");
572
573 return;
574 }
575
576 static void print_result(struct perf_kvm_stat *kvm)
577 {
578 char decode[decode_str_len];
579 struct kvm_event *event;
580 int vcpu = kvm->trace_vcpu;
581
582 if (kvm->live) {
583 puts(CONSOLE_CLEAR);
584 show_timeofday();
585 }
586
587 pr_info("\n\n");
588 print_vcpu_info(kvm);
589 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
590 pr_info("%10s ", "Samples");
591 pr_info("%9s ", "Samples%");
592
593 pr_info("%9s ", "Time%");
594 pr_info("%11s ", "Min Time");
595 pr_info("%11s ", "Max Time");
596 pr_info("%16s ", "Avg time");
597 pr_info("\n\n");
598
599 while ((event = pop_from_result(&kvm->result))) {
600 u64 ecount, etime, max, min;
601
602 ecount = get_event_count(event, vcpu);
603 etime = get_event_time(event, vcpu);
604 max = get_event_max(event, vcpu);
605 min = get_event_min(event, vcpu);
606
607 kvm->events_ops->decode_key(kvm, &event->key, decode);
608 pr_info("%*s ", decode_str_len, decode);
609 pr_info("%10llu ", (unsigned long long)ecount);
610 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
611 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
612 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
613 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
614 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
615 kvm_event_rel_stddev(vcpu, event));
616 pr_info("\n");
617 }
618
619 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
620 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
621
622 if (kvm->lost_events)
623 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
624 }
625
626 #ifdef HAVE_TIMERFD_SUPPORT
627 static int process_lost_event(struct perf_tool *tool,
628 union perf_event *event __maybe_unused,
629 struct perf_sample *sample __maybe_unused,
630 struct machine *machine __maybe_unused)
631 {
632 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
633
634 kvm->lost_events++;
635 return 0;
636 }
637 #endif
638
639 static bool skip_sample(struct perf_kvm_stat *kvm,
640 struct perf_sample *sample)
641 {
642 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
643 return true;
644
645 return false;
646 }
647
648 static int process_sample_event(struct perf_tool *tool,
649 union perf_event *event,
650 struct perf_sample *sample,
651 struct perf_evsel *evsel,
652 struct machine *machine)
653 {
654 int err = 0;
655 struct thread *thread;
656 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
657 tool);
658
659 if (skip_sample(kvm, sample))
660 return 0;
661
662 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
663 if (thread == NULL) {
664 pr_debug("problem processing %d event, skipping it.\n",
665 event->header.type);
666 return -1;
667 }
668
669 if (!handle_kvm_event(kvm, thread, evsel, sample))
670 err = -1;
671
672 thread__put(thread);
673 return err;
674 }
675
676 static int cpu_isa_config(struct perf_kvm_stat *kvm)
677 {
678 char buf[64], *cpuid;
679 int err;
680
681 if (kvm->live) {
682 err = get_cpuid(buf, sizeof(buf));
683 if (err != 0) {
684 pr_err("Failed to look up CPU type\n");
685 return err;
686 }
687 cpuid = buf;
688 } else
689 cpuid = kvm->session->header.env.cpuid;
690
691 if (!cpuid) {
692 pr_err("Failed to look up CPU type\n");
693 return -EINVAL;
694 }
695
696 err = cpu_isa_init(kvm, cpuid);
697 if (err == -ENOTSUP)
698 pr_err("CPU %s is not supported.\n", cpuid);
699
700 return err;
701 }
702
703 static bool verify_vcpu(int vcpu)
704 {
705 if (vcpu != -1 && vcpu < 0) {
706 pr_err("Invalid vcpu:%d.\n", vcpu);
707 return false;
708 }
709
710 return true;
711 }
712
713 #ifdef HAVE_TIMERFD_SUPPORT
714 /* keeping the max events to a modest level to keep
715 * the processing of samples per mmap smooth.
716 */
717 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
718
719 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
720 u64 *mmap_time)
721 {
722 union perf_event *event;
723 struct perf_sample sample;
724 s64 n = 0;
725 int err;
726
727 *mmap_time = ULLONG_MAX;
728 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
729 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
730 if (err) {
731 perf_evlist__mmap_consume(kvm->evlist, idx);
732 pr_err("Failed to parse sample\n");
733 return -1;
734 }
735
736 err = perf_session__queue_event(kvm->session, event, &sample, 0);
737 /*
738 * FIXME: Here we can't consume the event, as perf_session__queue_event will
739 * point to it, and it'll get possibly overwritten by the kernel.
740 */
741 perf_evlist__mmap_consume(kvm->evlist, idx);
742
743 if (err) {
744 pr_err("Failed to enqueue sample: %d\n", err);
745 return -1;
746 }
747
748 /* save time stamp of our first sample for this mmap */
749 if (n == 0)
750 *mmap_time = sample.time;
751
752 /* limit events per mmap handled all at once */
753 n++;
754 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
755 break;
756 }
757
758 return n;
759 }
760
761 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
762 {
763 int i, err, throttled = 0;
764 s64 n, ntotal = 0;
765 u64 flush_time = ULLONG_MAX, mmap_time;
766
767 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
768 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
769 if (n < 0)
770 return -1;
771
772 /* flush time is going to be the minimum of all the individual
773 * mmap times. Essentially, we flush all the samples queued up
774 * from the last pass under our minimal start time -- that leaves
775 * a very small race for samples to come in with a lower timestamp.
776 * The ioctl to return the perf_clock timestamp should close the
777 * race entirely.
778 */
779 if (mmap_time < flush_time)
780 flush_time = mmap_time;
781
782 ntotal += n;
783 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
784 throttled = 1;
785 }
786
787 /* flush queue after each round in which we processed events */
788 if (ntotal) {
789 struct ordered_events *oe = &kvm->session->ordered_events;
790
791 oe->next_flush = flush_time;
792 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
793 if (err) {
794 if (kvm->lost_events)
795 pr_info("\nLost events: %" PRIu64 "\n\n",
796 kvm->lost_events);
797 return err;
798 }
799 }
800
801 return throttled;
802 }
803
804 static volatile int done;
805
806 static void sig_handler(int sig __maybe_unused)
807 {
808 done = 1;
809 }
810
811 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
812 {
813 struct itimerspec new_value;
814 int rc = -1;
815
816 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
817 if (kvm->timerfd < 0) {
818 pr_err("timerfd_create failed\n");
819 goto out;
820 }
821
822 new_value.it_value.tv_sec = kvm->display_time;
823 new_value.it_value.tv_nsec = 0;
824 new_value.it_interval.tv_sec = kvm->display_time;
825 new_value.it_interval.tv_nsec = 0;
826
827 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
828 pr_err("timerfd_settime failed: %d\n", errno);
829 close(kvm->timerfd);
830 goto out;
831 }
832
833 rc = 0;
834 out:
835 return rc;
836 }
837
838 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
839 {
840 uint64_t c;
841 int rc;
842
843 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
844 if (rc < 0) {
845 if (errno == EAGAIN)
846 return 0;
847
848 pr_err("Failed to read timer fd: %d\n", errno);
849 return -1;
850 }
851
852 if (rc != sizeof(uint64_t)) {
853 pr_err("Error reading timer fd - invalid size returned\n");
854 return -1;
855 }
856
857 if (c != 1)
858 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
859
860 /* update display */
861 sort_result(kvm);
862 print_result(kvm);
863
864 /* reset counts */
865 clear_events_cache_stats(kvm->kvm_events_cache);
866 kvm->total_count = 0;
867 kvm->total_time = 0;
868 kvm->lost_events = 0;
869
870 return 0;
871 }
872
873 static int fd_set_nonblock(int fd)
874 {
875 long arg = 0;
876
877 arg = fcntl(fd, F_GETFL);
878 if (arg < 0) {
879 pr_err("Failed to get current flags for fd %d\n", fd);
880 return -1;
881 }
882
883 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
884 pr_err("Failed to set non-block option on fd %d\n", fd);
885 return -1;
886 }
887
888 return 0;
889 }
890
891 static int perf_kvm__handle_stdin(void)
892 {
893 int c;
894
895 c = getc(stdin);
896 if (c == 'q')
897 return 1;
898
899 return 0;
900 }
901
902 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
903 {
904 int nr_stdin, ret, err = -EINVAL;
905 struct termios save;
906
907 /* live flag must be set first */
908 kvm->live = true;
909
910 ret = cpu_isa_config(kvm);
911 if (ret < 0)
912 return ret;
913
914 if (!verify_vcpu(kvm->trace_vcpu) ||
915 !select_key(kvm) ||
916 !register_kvm_events_ops(kvm)) {
917 goto out;
918 }
919
920 set_term_quiet_input(&save);
921 init_kvm_event_record(kvm);
922
923 signal(SIGINT, sig_handler);
924 signal(SIGTERM, sig_handler);
925
926 /* add timer fd */
927 if (perf_kvm__timerfd_create(kvm) < 0) {
928 err = -1;
929 goto out;
930 }
931
932 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
933 goto out;
934
935 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
936 if (nr_stdin < 0)
937 goto out;
938
939 if (fd_set_nonblock(fileno(stdin)) != 0)
940 goto out;
941
942 /* everything is good - enable the events and process */
943 perf_evlist__enable(kvm->evlist);
944
945 while (!done) {
946 struct fdarray *fda = &kvm->evlist->pollfd;
947 int rc;
948
949 rc = perf_kvm__mmap_read(kvm);
950 if (rc < 0)
951 break;
952
953 err = perf_kvm__handle_timerfd(kvm);
954 if (err)
955 goto out;
956
957 if (fda->entries[nr_stdin].revents & POLLIN)
958 done = perf_kvm__handle_stdin();
959
960 if (!rc && !done)
961 err = fdarray__poll(fda, 100);
962 }
963
964 perf_evlist__disable(kvm->evlist);
965
966 if (err == 0) {
967 sort_result(kvm);
968 print_result(kvm);
969 }
970
971 out:
972 if (kvm->timerfd >= 0)
973 close(kvm->timerfd);
974
975 tcsetattr(0, TCSAFLUSH, &save);
976 return err;
977 }
978
979 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
980 {
981 int err, rc = -1;
982 struct perf_evsel *pos;
983 struct perf_evlist *evlist = kvm->evlist;
984 char sbuf[STRERR_BUFSIZE];
985
986 perf_evlist__config(evlist, &kvm->opts, NULL);
987
988 /*
989 * Note: exclude_{guest,host} do not apply here.
990 * This command processes KVM tracepoints from host only
991 */
992 evlist__for_each_entry(evlist, pos) {
993 struct perf_event_attr *attr = &pos->attr;
994
995 /* make sure these *are* set */
996 perf_evsel__set_sample_bit(pos, TID);
997 perf_evsel__set_sample_bit(pos, TIME);
998 perf_evsel__set_sample_bit(pos, CPU);
999 perf_evsel__set_sample_bit(pos, RAW);
1000 /* make sure these are *not*; want as small a sample as possible */
1001 perf_evsel__reset_sample_bit(pos, PERIOD);
1002 perf_evsel__reset_sample_bit(pos, IP);
1003 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1004 perf_evsel__reset_sample_bit(pos, ADDR);
1005 perf_evsel__reset_sample_bit(pos, READ);
1006 attr->mmap = 0;
1007 attr->comm = 0;
1008 attr->task = 0;
1009
1010 attr->sample_period = 1;
1011
1012 attr->watermark = 0;
1013 attr->wakeup_events = 1000;
1014
1015 /* will enable all once we are ready */
1016 attr->disabled = 1;
1017 }
1018
1019 err = perf_evlist__open(evlist);
1020 if (err < 0) {
1021 printf("Couldn't create the events: %s\n",
1022 str_error_r(errno, sbuf, sizeof(sbuf)));
1023 goto out;
1024 }
1025
1026 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1027 ui__error("Failed to mmap the events: %s\n",
1028 str_error_r(errno, sbuf, sizeof(sbuf)));
1029 perf_evlist__close(evlist);
1030 goto out;
1031 }
1032
1033 rc = 0;
1034
1035 out:
1036 return rc;
1037 }
1038 #endif
1039
1040 static int read_events(struct perf_kvm_stat *kvm)
1041 {
1042 int ret;
1043
1044 struct perf_tool eops = {
1045 .sample = process_sample_event,
1046 .comm = perf_event__process_comm,
1047 .ordered_events = true,
1048 };
1049 struct perf_data_file file = {
1050 .path = kvm->file_name,
1051 .mode = PERF_DATA_MODE_READ,
1052 .force = kvm->force,
1053 };
1054
1055 kvm->tool = eops;
1056 kvm->session = perf_session__new(&file, false, &kvm->tool);
1057 if (!kvm->session) {
1058 pr_err("Initializing perf session failed\n");
1059 return -1;
1060 }
1061
1062 symbol__init(&kvm->session->header.env);
1063
1064 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1065 ret = -EINVAL;
1066 goto out_delete;
1067 }
1068
1069 /*
1070 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1071 * traced in the old kernel.
1072 */
1073 ret = cpu_isa_config(kvm);
1074 if (ret < 0)
1075 goto out_delete;
1076
1077 ret = perf_session__process_events(kvm->session);
1078
1079 out_delete:
1080 perf_session__delete(kvm->session);
1081 return ret;
1082 }
1083
1084 static int parse_target_str(struct perf_kvm_stat *kvm)
1085 {
1086 if (kvm->opts.target.pid) {
1087 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1088 if (kvm->pid_list == NULL) {
1089 pr_err("Error parsing process id string\n");
1090 return -EINVAL;
1091 }
1092 }
1093
1094 return 0;
1095 }
1096
1097 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1098 {
1099 int ret = -EINVAL;
1100 int vcpu = kvm->trace_vcpu;
1101
1102 if (parse_target_str(kvm) != 0)
1103 goto exit;
1104
1105 if (!verify_vcpu(vcpu))
1106 goto exit;
1107
1108 if (!select_key(kvm))
1109 goto exit;
1110
1111 if (!register_kvm_events_ops(kvm))
1112 goto exit;
1113
1114 init_kvm_event_record(kvm);
1115 setup_pager();
1116
1117 ret = read_events(kvm);
1118 if (ret)
1119 goto exit;
1120
1121 sort_result(kvm);
1122 print_result(kvm);
1123
1124 exit:
1125 return ret;
1126 }
1127
1128 #define STRDUP_FAIL_EXIT(s) \
1129 ({ char *_p; \
1130 _p = strdup(s); \
1131 if (!_p) \
1132 return -ENOMEM; \
1133 _p; \
1134 })
1135
1136 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1137 {
1138 return 0;
1139 }
1140
1141 static int
1142 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1143 {
1144 unsigned int rec_argc, i, j, events_tp_size;
1145 const char **rec_argv;
1146 const char * const record_args[] = {
1147 "record",
1148 "-R",
1149 "-m", "1024",
1150 "-c", "1",
1151 };
1152 const char * const kvm_stat_record_usage[] = {
1153 "perf kvm stat record [<options>]",
1154 NULL
1155 };
1156 const char * const *events_tp;
1157 int ret;
1158
1159 events_tp_size = 0;
1160 ret = setup_kvm_events_tp(kvm);
1161 if (ret < 0) {
1162 pr_err("Unable to setup the kvm tracepoints\n");
1163 return ret;
1164 }
1165
1166 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1167 events_tp_size++;
1168
1169 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1170 2 * events_tp_size;
1171 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1172
1173 if (rec_argv == NULL)
1174 return -ENOMEM;
1175
1176 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1177 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1178
1179 for (j = 0; j < events_tp_size; j++) {
1180 rec_argv[i++] = "-e";
1181 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1182 }
1183
1184 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1185 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1186
1187 for (j = 1; j < (unsigned int)argc; j++, i++)
1188 rec_argv[i] = argv[j];
1189
1190 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1191 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1192 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1193
1194 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1195 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1196 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1197 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1198 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1199 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1200 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1201 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1202 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1203 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1204 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1205 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1206 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1207 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1208 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1209
1210 record_usage = kvm_stat_record_usage;
1211 return cmd_record(i, rec_argv, NULL);
1212 }
1213
1214 static int
1215 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1216 {
1217 const struct option kvm_events_report_options[] = {
1218 OPT_STRING(0, "event", &kvm->report_event, "report event",
1219 "event for reporting: vmexit, "
1220 "mmio (x86 only), ioport (x86 only)"),
1221 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1222 "vcpu id to report"),
1223 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1224 "key for sorting: sample(sort by samples number)"
1225 " time (sort by avg time)"),
1226 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1227 "analyze events only for given process id(s)"),
1228 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1229 OPT_END()
1230 };
1231
1232 const char * const kvm_events_report_usage[] = {
1233 "perf kvm stat report [<options>]",
1234 NULL
1235 };
1236
1237 if (argc) {
1238 argc = parse_options(argc, argv,
1239 kvm_events_report_options,
1240 kvm_events_report_usage, 0);
1241 if (argc)
1242 usage_with_options(kvm_events_report_usage,
1243 kvm_events_report_options);
1244 }
1245
1246 if (!kvm->opts.target.pid)
1247 kvm->opts.target.system_wide = true;
1248
1249 return kvm_events_report_vcpu(kvm);
1250 }
1251
1252 #ifdef HAVE_TIMERFD_SUPPORT
1253 static struct perf_evlist *kvm_live_event_list(void)
1254 {
1255 struct perf_evlist *evlist;
1256 char *tp, *name, *sys;
1257 int err = -1;
1258 const char * const *events_tp;
1259
1260 evlist = perf_evlist__new();
1261 if (evlist == NULL)
1262 return NULL;
1263
1264 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1265
1266 tp = strdup(*events_tp);
1267 if (tp == NULL)
1268 goto out;
1269
1270 /* split tracepoint into subsystem and name */
1271 sys = tp;
1272 name = strchr(tp, ':');
1273 if (name == NULL) {
1274 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1275 *events_tp);
1276 free(tp);
1277 goto out;
1278 }
1279 *name = '\0';
1280 name++;
1281
1282 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1283 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1284 free(tp);
1285 goto out;
1286 }
1287
1288 free(tp);
1289 }
1290
1291 err = 0;
1292
1293 out:
1294 if (err) {
1295 perf_evlist__delete(evlist);
1296 evlist = NULL;
1297 }
1298
1299 return evlist;
1300 }
1301
1302 static int kvm_events_live(struct perf_kvm_stat *kvm,
1303 int argc, const char **argv)
1304 {
1305 char errbuf[BUFSIZ];
1306 int err;
1307
1308 const struct option live_options[] = {
1309 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1310 "record events on existing process id"),
1311 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1312 "number of mmap data pages",
1313 perf_evlist__parse_mmap_pages),
1314 OPT_INCR('v', "verbose", &verbose,
1315 "be more verbose (show counter open errors, etc)"),
1316 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1317 "system-wide collection from all CPUs"),
1318 OPT_UINTEGER('d', "display", &kvm->display_time,
1319 "time in seconds between display updates"),
1320 OPT_STRING(0, "event", &kvm->report_event, "report event",
1321 "event for reporting: "
1322 "vmexit, mmio (x86 only), ioport (x86 only)"),
1323 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1324 "vcpu id to report"),
1325 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1326 "key for sorting: sample(sort by samples number)"
1327 " time (sort by avg time)"),
1328 OPT_U64(0, "duration", &kvm->duration,
1329 "show events other than"
1330 " HLT (x86 only) or Wait state (s390 only)"
1331 " that take longer than duration usecs"),
1332 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1333 "per thread proc mmap processing timeout in ms"),
1334 OPT_END()
1335 };
1336 const char * const live_usage[] = {
1337 "perf kvm stat live [<options>]",
1338 NULL
1339 };
1340 struct perf_data_file file = {
1341 .mode = PERF_DATA_MODE_WRITE,
1342 };
1343
1344
1345 /* event handling */
1346 kvm->tool.sample = process_sample_event;
1347 kvm->tool.comm = perf_event__process_comm;
1348 kvm->tool.exit = perf_event__process_exit;
1349 kvm->tool.fork = perf_event__process_fork;
1350 kvm->tool.lost = process_lost_event;
1351 kvm->tool.ordered_events = true;
1352 perf_tool__fill_defaults(&kvm->tool);
1353
1354 /* set defaults */
1355 kvm->display_time = 1;
1356 kvm->opts.user_interval = 1;
1357 kvm->opts.mmap_pages = 512;
1358 kvm->opts.target.uses_mmap = false;
1359 kvm->opts.target.uid_str = NULL;
1360 kvm->opts.target.uid = UINT_MAX;
1361 kvm->opts.proc_map_timeout = 500;
1362
1363 symbol__init(NULL);
1364 disable_buildid_cache();
1365
1366 use_browser = 0;
1367
1368 if (argc) {
1369 argc = parse_options(argc, argv, live_options,
1370 live_usage, 0);
1371 if (argc)
1372 usage_with_options(live_usage, live_options);
1373 }
1374
1375 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1376
1377 /*
1378 * target related setups
1379 */
1380 err = target__validate(&kvm->opts.target);
1381 if (err) {
1382 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1383 ui__warning("%s", errbuf);
1384 }
1385
1386 if (target__none(&kvm->opts.target))
1387 kvm->opts.target.system_wide = true;
1388
1389
1390 /*
1391 * generate the event list
1392 */
1393 err = setup_kvm_events_tp(kvm);
1394 if (err < 0) {
1395 pr_err("Unable to setup the kvm tracepoints\n");
1396 return err;
1397 }
1398
1399 kvm->evlist = kvm_live_event_list();
1400 if (kvm->evlist == NULL) {
1401 err = -1;
1402 goto out;
1403 }
1404
1405 symbol_conf.nr_events = kvm->evlist->nr_entries;
1406
1407 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1408 usage_with_options(live_usage, live_options);
1409
1410 /*
1411 * perf session
1412 */
1413 kvm->session = perf_session__new(&file, false, &kvm->tool);
1414 if (kvm->session == NULL) {
1415 err = -1;
1416 goto out;
1417 }
1418 kvm->session->evlist = kvm->evlist;
1419 perf_session__set_id_hdr_size(kvm->session);
1420 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1421 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1422 kvm->evlist->threads, false, kvm->opts.proc_map_timeout);
1423 err = kvm_live_open_events(kvm);
1424 if (err)
1425 goto out;
1426
1427 err = kvm_events_live_report(kvm);
1428
1429 out:
1430 perf_session__delete(kvm->session);
1431 kvm->session = NULL;
1432 perf_evlist__delete(kvm->evlist);
1433
1434 return err;
1435 }
1436 #endif
1437
1438 static void print_kvm_stat_usage(void)
1439 {
1440 printf("Usage: perf kvm stat <command>\n\n");
1441
1442 printf("# Available commands:\n");
1443 printf("\trecord: record kvm events\n");
1444 printf("\treport: report statistical data of kvm events\n");
1445 printf("\tlive: live reporting of statistical data of kvm events\n");
1446
1447 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1448 }
1449
1450 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1451 {
1452 struct perf_kvm_stat kvm = {
1453 .file_name = file_name,
1454
1455 .trace_vcpu = -1,
1456 .report_event = "vmexit",
1457 .sort_key = "sample",
1458
1459 };
1460
1461 if (argc == 1) {
1462 print_kvm_stat_usage();
1463 goto perf_stat;
1464 }
1465
1466 if (!strncmp(argv[1], "rec", 3))
1467 return kvm_events_record(&kvm, argc - 1, argv + 1);
1468
1469 if (!strncmp(argv[1], "rep", 3))
1470 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1471
1472 #ifdef HAVE_TIMERFD_SUPPORT
1473 if (!strncmp(argv[1], "live", 4))
1474 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1475 #endif
1476
1477 perf_stat:
1478 return cmd_stat(argc, argv, NULL);
1479 }
1480 #endif /* HAVE_KVM_STAT_SUPPORT */
1481
1482 static int __cmd_record(const char *file_name, int argc, const char **argv)
1483 {
1484 int rec_argc, i = 0, j;
1485 const char **rec_argv;
1486
1487 rec_argc = argc + 2;
1488 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1489 rec_argv[i++] = strdup("record");
1490 rec_argv[i++] = strdup("-o");
1491 rec_argv[i++] = strdup(file_name);
1492 for (j = 1; j < argc; j++, i++)
1493 rec_argv[i] = argv[j];
1494
1495 BUG_ON(i != rec_argc);
1496
1497 return cmd_record(i, rec_argv, NULL);
1498 }
1499
1500 static int __cmd_report(const char *file_name, int argc, const char **argv)
1501 {
1502 int rec_argc, i = 0, j;
1503 const char **rec_argv;
1504
1505 rec_argc = argc + 2;
1506 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1507 rec_argv[i++] = strdup("report");
1508 rec_argv[i++] = strdup("-i");
1509 rec_argv[i++] = strdup(file_name);
1510 for (j = 1; j < argc; j++, i++)
1511 rec_argv[i] = argv[j];
1512
1513 BUG_ON(i != rec_argc);
1514
1515 return cmd_report(i, rec_argv, NULL);
1516 }
1517
1518 static int
1519 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1520 {
1521 int rec_argc, i = 0, j;
1522 const char **rec_argv;
1523
1524 rec_argc = argc + 2;
1525 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1526 rec_argv[i++] = strdup("buildid-list");
1527 rec_argv[i++] = strdup("-i");
1528 rec_argv[i++] = strdup(file_name);
1529 for (j = 1; j < argc; j++, i++)
1530 rec_argv[i] = argv[j];
1531
1532 BUG_ON(i != rec_argc);
1533
1534 return cmd_buildid_list(i, rec_argv, NULL);
1535 }
1536
1537 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1538 {
1539 const char *file_name = NULL;
1540 const struct option kvm_options[] = {
1541 OPT_STRING('i', "input", &file_name, "file",
1542 "Input file name"),
1543 OPT_STRING('o', "output", &file_name, "file",
1544 "Output file name"),
1545 OPT_BOOLEAN(0, "guest", &perf_guest,
1546 "Collect guest os data"),
1547 OPT_BOOLEAN(0, "host", &perf_host,
1548 "Collect host os data"),
1549 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1550 "guest mount directory under which every guest os"
1551 " instance has a subdir"),
1552 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1553 "file", "file saving guest os vmlinux"),
1554 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1555 "file", "file saving guest os /proc/kallsyms"),
1556 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1557 "file", "file saving guest os /proc/modules"),
1558 OPT_INCR('v', "verbose", &verbose,
1559 "be more verbose (show counter open errors, etc)"),
1560 OPT_END()
1561 };
1562
1563 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1564 "buildid-list", "stat", NULL };
1565 const char *kvm_usage[] = { NULL, NULL };
1566
1567 perf_host = 0;
1568 perf_guest = 1;
1569
1570 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1571 PARSE_OPT_STOP_AT_NON_OPTION);
1572 if (!argc)
1573 usage_with_options(kvm_usage, kvm_options);
1574
1575 if (!perf_host)
1576 perf_guest = 1;
1577
1578 if (!file_name) {
1579 file_name = get_filename_for_perf_kvm();
1580
1581 if (!file_name) {
1582 pr_err("Failed to allocate memory for filename\n");
1583 return -ENOMEM;
1584 }
1585 }
1586
1587 if (!strncmp(argv[0], "rec", 3))
1588 return __cmd_record(file_name, argc, argv);
1589 else if (!strncmp(argv[0], "rep", 3))
1590 return __cmd_report(file_name, argc, argv);
1591 else if (!strncmp(argv[0], "diff", 4))
1592 return cmd_diff(argc, argv, NULL);
1593 else if (!strncmp(argv[0], "top", 3))
1594 return cmd_top(argc, argv, NULL);
1595 else if (!strncmp(argv[0], "buildid-list", 12))
1596 return __cmd_buildid_list(file_name, argc, argv);
1597 #ifdef HAVE_KVM_STAT_SUPPORT
1598 else if (!strncmp(argv[0], "stat", 4))
1599 return kvm_cmd_stat(file_name, argc, argv);
1600 #endif
1601 else
1602 usage_with_options(kvm_usage, kvm_options);
1603
1604 return 0;
1605 }
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