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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / tools / perf / builtin-kvm.c
blob577af4f3297aaa6cd03181f34bb3fac962e0d564
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 = perf_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 = perf_evsel__intval(evsel, sample,
420 vcpu_id_str);
421 thread__set_priv(thread, vcpu_record);
422 }
423
424 return thread__priv(thread);
425 }
426
427 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
428 struct thread *thread,
429 struct evsel *evsel,
430 struct perf_sample *sample)
431 {
432 struct vcpu_event_record *vcpu_record;
433 struct event_key key = { .key = INVALID_KEY,
434 .exit_reasons = kvm->exit_reasons };
435
436 vcpu_record = per_vcpu_record(thread, evsel, sample);
437 if (!vcpu_record)
438 return true;
439
440 /* only process events for vcpus user cares about */
441 if ((kvm->trace_vcpu != -1) &&
442 (kvm->trace_vcpu != vcpu_record->vcpu_id))
443 return true;
444
445 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
446 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
447
448 if (is_child_event(kvm, evsel, sample, &key))
449 return handle_child_event(kvm, vcpu_record, &key, sample);
450
451 if (kvm->events_ops->is_end_event(evsel, sample, &key))
452 return handle_end_event(kvm, vcpu_record, &key, sample);
453
454 return true;
455 }
456
457 #define GET_EVENT_KEY(func, field) \
458 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
459 { \
460 if (vcpu == -1) \
461 return event->total.field; \
462 \
463 if (vcpu >= event->max_vcpu) \
464 return 0; \
465 \
466 return event->vcpu[vcpu].field; \
467 }
468
469 #define COMPARE_EVENT_KEY(func, field) \
470 GET_EVENT_KEY(func, field) \
471 static int compare_kvm_event_ ## func(struct kvm_event *one, \
472 struct kvm_event *two, int vcpu)\
473 { \
474 return get_event_ ##func(one, vcpu) > \
475 get_event_ ##func(two, vcpu); \
476 }
477
478 GET_EVENT_KEY(time, time);
479 COMPARE_EVENT_KEY(count, stats.n);
480 COMPARE_EVENT_KEY(mean, stats.mean);
481 GET_EVENT_KEY(max, stats.max);
482 GET_EVENT_KEY(min, stats.min);
483
484 #define DEF_SORT_NAME_KEY(name, compare_key) \
485 { #name, compare_kvm_event_ ## compare_key }
486
487 static struct kvm_event_key keys[] = {
488 DEF_SORT_NAME_KEY(sample, count),
489 DEF_SORT_NAME_KEY(time, mean),
490 { NULL, NULL }
491 };
492
493 static bool select_key(struct perf_kvm_stat *kvm)
494 {
495 int i;
496
497 for (i = 0; keys[i].name; i++) {
498 if (!strcmp(keys[i].name, kvm->sort_key)) {
499 kvm->compare = keys[i].key;
500 return true;
501 }
502 }
503
504 pr_err("Unknown compare key:%s\n", kvm->sort_key);
505 return false;
506 }
507
508 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
509 key_cmp_fun bigger, int vcpu)
510 {
511 struct rb_node **rb = &result->rb_node;
512 struct rb_node *parent = NULL;
513 struct kvm_event *p;
514
515 while (*rb) {
516 p = container_of(*rb, struct kvm_event, rb);
517 parent = *rb;
518
519 if (bigger(event, p, vcpu))
520 rb = &(*rb)->rb_left;
521 else
522 rb = &(*rb)->rb_right;
523 }
524
525 rb_link_node(&event->rb, parent, rb);
526 rb_insert_color(&event->rb, result);
527 }
528
529 static void
530 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
531 {
532 int vcpu = kvm->trace_vcpu;
533
534 kvm->total_count += get_event_count(event, vcpu);
535 kvm->total_time += get_event_time(event, vcpu);
536 }
537
538 static bool event_is_valid(struct kvm_event *event, int vcpu)
539 {
540 return !!get_event_count(event, vcpu);
541 }
542
543 static void sort_result(struct perf_kvm_stat *kvm)
544 {
545 unsigned int i;
546 int vcpu = kvm->trace_vcpu;
547 struct kvm_event *event;
548
549 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
550 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
551 if (event_is_valid(event, vcpu)) {
552 update_total_count(kvm, event);
553 insert_to_result(&kvm->result, event,
554 kvm->compare, vcpu);
555 }
556 }
557 }
558 }
559
560 /* returns left most element of result, and erase it */
561 static struct kvm_event *pop_from_result(struct rb_root *result)
562 {
563 struct rb_node *node = rb_first(result);
564
565 if (!node)
566 return NULL;
567
568 rb_erase(node, result);
569 return container_of(node, struct kvm_event, rb);
570 }
571
572 static void print_vcpu_info(struct perf_kvm_stat *kvm)
573 {
574 int vcpu = kvm->trace_vcpu;
575
576 pr_info("Analyze events for ");
577
578 if (kvm->opts.target.system_wide)
579 pr_info("all VMs, ");
580 else if (kvm->opts.target.pid)
581 pr_info("pid(s) %s, ", kvm->opts.target.pid);
582 else
583 pr_info("dazed and confused on what is monitored, ");
584
585 if (vcpu == -1)
586 pr_info("all VCPUs:\n\n");
587 else
588 pr_info("VCPU %d:\n\n", vcpu);
589 }
590
591 static void show_timeofday(void)
592 {
593 char date[64];
594 struct timeval tv;
595 struct tm ltime;
596
597 gettimeofday(&tv, NULL);
598 if (localtime_r(&tv.tv_sec, &ltime)) {
599 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
600 pr_info("%s.%06ld", date, tv.tv_usec);
601 } else
602 pr_info("00:00:00.000000");
603
604 return;
605 }
606
607 static void print_result(struct perf_kvm_stat *kvm)
608 {
609 char decode[decode_str_len];
610 struct kvm_event *event;
611 int vcpu = kvm->trace_vcpu;
612
613 if (kvm->live) {
614 puts(CONSOLE_CLEAR);
615 show_timeofday();
616 }
617
618 pr_info("\n\n");
619 print_vcpu_info(kvm);
620 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
621 pr_info("%10s ", "Samples");
622 pr_info("%9s ", "Samples%");
623
624 pr_info("%9s ", "Time%");
625 pr_info("%11s ", "Min Time");
626 pr_info("%11s ", "Max Time");
627 pr_info("%16s ", "Avg time");
628 pr_info("\n\n");
629
630 while ((event = pop_from_result(&kvm->result))) {
631 u64 ecount, etime, max, min;
632
633 ecount = get_event_count(event, vcpu);
634 etime = get_event_time(event, vcpu);
635 max = get_event_max(event, vcpu);
636 min = get_event_min(event, vcpu);
637
638 kvm->events_ops->decode_key(kvm, &event->key, decode);
639 pr_info("%*s ", decode_str_len, decode);
640 pr_info("%10llu ", (unsigned long long)ecount);
641 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
642 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
643 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
644 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
645 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
646 kvm_event_rel_stddev(vcpu, event));
647 pr_info("\n");
648 }
649
650 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
651 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
652
653 if (kvm->lost_events)
654 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
655 }
656
657 #ifdef HAVE_TIMERFD_SUPPORT
658 static int process_lost_event(struct perf_tool *tool,
659 union perf_event *event __maybe_unused,
660 struct perf_sample *sample __maybe_unused,
661 struct machine *machine __maybe_unused)
662 {
663 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
664
665 kvm->lost_events++;
666 return 0;
667 }
668 #endif
669
670 static bool skip_sample(struct perf_kvm_stat *kvm,
671 struct perf_sample *sample)
672 {
673 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
674 return true;
675
676 return false;
677 }
678
679 static int process_sample_event(struct perf_tool *tool,
680 union perf_event *event,
681 struct perf_sample *sample,
682 struct evsel *evsel,
683 struct machine *machine)
684 {
685 int err = 0;
686 struct thread *thread;
687 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
688 tool);
689
690 if (skip_sample(kvm, sample))
691 return 0;
692
693 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
694 if (thread == NULL) {
695 pr_debug("problem processing %d event, skipping it.\n",
696 event->header.type);
697 return -1;
698 }
699
700 if (!handle_kvm_event(kvm, thread, evsel, sample))
701 err = -1;
702
703 thread__put(thread);
704 return err;
705 }
706
707 static int cpu_isa_config(struct perf_kvm_stat *kvm)
708 {
709 char buf[128], *cpuid;
710 int err;
711
712 if (kvm->live) {
713 err = get_cpuid(buf, sizeof(buf));
714 if (err != 0) {
715 pr_err("Failed to look up CPU type: %s\n",
716 str_error_r(err, buf, sizeof(buf)));
717 return -err;
718 }
719 cpuid = buf;
720 } else
721 cpuid = kvm->session->header.env.cpuid;
722
723 if (!cpuid) {
724 pr_err("Failed to look up CPU type\n");
725 return -EINVAL;
726 }
727
728 err = cpu_isa_init(kvm, cpuid);
729 if (err == -ENOTSUP)
730 pr_err("CPU %s is not supported.\n", cpuid);
731
732 return err;
733 }
734
735 static bool verify_vcpu(int vcpu)
736 {
737 if (vcpu != -1 && vcpu < 0) {
738 pr_err("Invalid vcpu:%d.\n", vcpu);
739 return false;
740 }
741
742 return true;
743 }
744
745 #ifdef HAVE_TIMERFD_SUPPORT
746 /* keeping the max events to a modest level to keep
747 * the processing of samples per mmap smooth.
748 */
749 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
750
751 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
752 u64 *mmap_time)
753 {
754 struct evlist *evlist = kvm->evlist;
755 union perf_event *event;
756 struct mmap *md;
757 u64 timestamp;
758 s64 n = 0;
759 int err;
760
761 *mmap_time = ULLONG_MAX;
762 md = &evlist->mmap[idx];
763 err = perf_mmap__read_init(&md->core);
764 if (err < 0)
765 return (err == -EAGAIN) ? 0 : -1;
766
767 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
768 err = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
769 if (err) {
770 perf_mmap__consume(&md->core);
771 pr_err("Failed to parse sample\n");
772 return -1;
773 }
774
775 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
776 /*
777 * FIXME: Here we can't consume the event, as perf_session__queue_event will
778 * point to it, and it'll get possibly overwritten by the kernel.
779 */
780 perf_mmap__consume(&md->core);
781
782 if (err) {
783 pr_err("Failed to enqueue sample: %d\n", err);
784 return -1;
785 }
786
787 /* save time stamp of our first sample for this mmap */
788 if (n == 0)
789 *mmap_time = timestamp;
790
791 /* limit events per mmap handled all at once */
792 n++;
793 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
794 break;
795 }
796
797 perf_mmap__read_done(&md->core);
798 return n;
799 }
800
801 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
802 {
803 int i, err, throttled = 0;
804 s64 n, ntotal = 0;
805 u64 flush_time = ULLONG_MAX, mmap_time;
806
807 for (i = 0; i < kvm->evlist->core.nr_mmaps; i++) {
808 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
809 if (n < 0)
810 return -1;
811
812 /* flush time is going to be the minimum of all the individual
813 * mmap times. Essentially, we flush all the samples queued up
814 * from the last pass under our minimal start time -- that leaves
815 * a very small race for samples to come in with a lower timestamp.
816 * The ioctl to return the perf_clock timestamp should close the
817 * race entirely.
818 */
819 if (mmap_time < flush_time)
820 flush_time = mmap_time;
821
822 ntotal += n;
823 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
824 throttled = 1;
825 }
826
827 /* flush queue after each round in which we processed events */
828 if (ntotal) {
829 struct ordered_events *oe = &kvm->session->ordered_events;
830
831 oe->next_flush = flush_time;
832 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
833 if (err) {
834 if (kvm->lost_events)
835 pr_info("\nLost events: %" PRIu64 "\n\n",
836 kvm->lost_events);
837 return err;
838 }
839 }
840
841 return throttled;
842 }
843
844 static volatile int done;
845
846 static void sig_handler(int sig __maybe_unused)
847 {
848 done = 1;
849 }
850
851 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
852 {
853 struct itimerspec new_value;
854 int rc = -1;
855
856 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
857 if (kvm->timerfd < 0) {
858 pr_err("timerfd_create failed\n");
859 goto out;
860 }
861
862 new_value.it_value.tv_sec = kvm->display_time;
863 new_value.it_value.tv_nsec = 0;
864 new_value.it_interval.tv_sec = kvm->display_time;
865 new_value.it_interval.tv_nsec = 0;
866
867 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
868 pr_err("timerfd_settime failed: %d\n", errno);
869 close(kvm->timerfd);
870 goto out;
871 }
872
873 rc = 0;
874 out:
875 return rc;
876 }
877
878 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
879 {
880 uint64_t c;
881 int rc;
882
883 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
884 if (rc < 0) {
885 if (errno == EAGAIN)
886 return 0;
887
888 pr_err("Failed to read timer fd: %d\n", errno);
889 return -1;
890 }
891
892 if (rc != sizeof(uint64_t)) {
893 pr_err("Error reading timer fd - invalid size returned\n");
894 return -1;
895 }
896
897 if (c != 1)
898 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
899
900 /* update display */
901 sort_result(kvm);
902 print_result(kvm);
903
904 /* reset counts */
905 clear_events_cache_stats(kvm->kvm_events_cache);
906 kvm->total_count = 0;
907 kvm->total_time = 0;
908 kvm->lost_events = 0;
909
910 return 0;
911 }
912
913 static int fd_set_nonblock(int fd)
914 {
915 long arg = 0;
916
917 arg = fcntl(fd, F_GETFL);
918 if (arg < 0) {
919 pr_err("Failed to get current flags for fd %d\n", fd);
920 return -1;
921 }
922
923 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
924 pr_err("Failed to set non-block option on fd %d\n", fd);
925 return -1;
926 }
927
928 return 0;
929 }
930
931 static int perf_kvm__handle_stdin(void)
932 {
933 int c;
934
935 c = getc(stdin);
936 if (c == 'q')
937 return 1;
938
939 return 0;
940 }
941
942 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
943 {
944 int nr_stdin, ret, err = -EINVAL;
945 struct termios save;
946
947 /* live flag must be set first */
948 kvm->live = true;
949
950 ret = cpu_isa_config(kvm);
951 if (ret < 0)
952 return ret;
953
954 if (!verify_vcpu(kvm->trace_vcpu) ||
955 !select_key(kvm) ||
956 !register_kvm_events_ops(kvm)) {
957 goto out;
958 }
959
960 set_term_quiet_input(&save);
961 init_kvm_event_record(kvm);
962
963 signal(SIGINT, sig_handler);
964 signal(SIGTERM, sig_handler);
965
966 /* add timer fd */
967 if (perf_kvm__timerfd_create(kvm) < 0) {
968 err = -1;
969 goto out;
970 }
971
972 if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
973 goto out;
974
975 nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin));
976 if (nr_stdin < 0)
977 goto out;
978
979 if (fd_set_nonblock(fileno(stdin)) != 0)
980 goto out;
981
982 /* everything is good - enable the events and process */
983 evlist__enable(kvm->evlist);
984
985 while (!done) {
986 struct fdarray *fda = &kvm->evlist->core.pollfd;
987 int rc;
988
989 rc = perf_kvm__mmap_read(kvm);
990 if (rc < 0)
991 break;
992
993 err = perf_kvm__handle_timerfd(kvm);
994 if (err)
995 goto out;
996
997 if (fda->entries[nr_stdin].revents & POLLIN)
998 done = perf_kvm__handle_stdin();
999
1000 if (!rc && !done)
1001 err = evlist__poll(kvm->evlist, 100);
1002 }
1003
1004 evlist__disable(kvm->evlist);
1005
1006 if (err == 0) {
1007 sort_result(kvm);
1008 print_result(kvm);
1009 }
1010
1011 out:
1012 if (kvm->timerfd >= 0)
1013 close(kvm->timerfd);
1014
1015 tcsetattr(0, TCSAFLUSH, &save);
1016 return err;
1017 }
1018
1019 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1020 {
1021 int err, rc = -1;
1022 struct evsel *pos;
1023 struct evlist *evlist = kvm->evlist;
1024 char sbuf[STRERR_BUFSIZE];
1025
1026 perf_evlist__config(evlist, &kvm->opts, NULL);
1027
1028 /*
1029 * Note: exclude_{guest,host} do not apply here.
1030 * This command processes KVM tracepoints from host only
1031 */
1032 evlist__for_each_entry(evlist, pos) {
1033 struct perf_event_attr *attr = &pos->core.attr;
1034
1035 /* make sure these *are* set */
1036 perf_evsel__set_sample_bit(pos, TID);
1037 perf_evsel__set_sample_bit(pos, TIME);
1038 perf_evsel__set_sample_bit(pos, CPU);
1039 perf_evsel__set_sample_bit(pos, RAW);
1040 /* make sure these are *not*; want as small a sample as possible */
1041 perf_evsel__reset_sample_bit(pos, PERIOD);
1042 perf_evsel__reset_sample_bit(pos, IP);
1043 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1044 perf_evsel__reset_sample_bit(pos, ADDR);
1045 perf_evsel__reset_sample_bit(pos, READ);
1046 attr->mmap = 0;
1047 attr->comm = 0;
1048 attr->task = 0;
1049
1050 attr->sample_period = 1;
1051
1052 attr->watermark = 0;
1053 attr->wakeup_events = 1000;
1054
1055 /* will enable all once we are ready */
1056 attr->disabled = 1;
1057 }
1058
1059 err = evlist__open(evlist);
1060 if (err < 0) {
1061 printf("Couldn't create the events: %s\n",
1062 str_error_r(errno, sbuf, sizeof(sbuf)));
1063 goto out;
1064 }
1065
1066 if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1067 ui__error("Failed to mmap the events: %s\n",
1068 str_error_r(errno, sbuf, sizeof(sbuf)));
1069 evlist__close(evlist);
1070 goto out;
1071 }
1072
1073 rc = 0;
1074
1075 out:
1076 return rc;
1077 }
1078 #endif
1079
1080 static int read_events(struct perf_kvm_stat *kvm)
1081 {
1082 int ret;
1083
1084 struct perf_tool eops = {
1085 .sample = process_sample_event,
1086 .comm = perf_event__process_comm,
1087 .namespaces = perf_event__process_namespaces,
1088 .ordered_events = true,
1089 };
1090 struct perf_data file = {
1091 .path = kvm->file_name,
1092 .mode = PERF_DATA_MODE_READ,
1093 .force = kvm->force,
1094 };
1095
1096 kvm->tool = eops;
1097 kvm->session = perf_session__new(&file, false, &kvm->tool);
1098 if (IS_ERR(kvm->session)) {
1099 pr_err("Initializing perf session failed\n");
1100 return PTR_ERR(kvm->session);
1101 }
1102
1103 symbol__init(&kvm->session->header.env);
1104
1105 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1106 ret = -EINVAL;
1107 goto out_delete;
1108 }
1109
1110 /*
1111 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1112 * traced in the old kernel.
1113 */
1114 ret = cpu_isa_config(kvm);
1115 if (ret < 0)
1116 goto out_delete;
1117
1118 ret = perf_session__process_events(kvm->session);
1119
1120 out_delete:
1121 perf_session__delete(kvm->session);
1122 return ret;
1123 }
1124
1125 static int parse_target_str(struct perf_kvm_stat *kvm)
1126 {
1127 if (kvm->opts.target.pid) {
1128 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1129 if (kvm->pid_list == NULL) {
1130 pr_err("Error parsing process id string\n");
1131 return -EINVAL;
1132 }
1133 }
1134
1135 return 0;
1136 }
1137
1138 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1139 {
1140 int ret = -EINVAL;
1141 int vcpu = kvm->trace_vcpu;
1142
1143 if (parse_target_str(kvm) != 0)
1144 goto exit;
1145
1146 if (!verify_vcpu(vcpu))
1147 goto exit;
1148
1149 if (!select_key(kvm))
1150 goto exit;
1151
1152 if (!register_kvm_events_ops(kvm))
1153 goto exit;
1154
1155 init_kvm_event_record(kvm);
1156 setup_pager();
1157
1158 ret = read_events(kvm);
1159 if (ret)
1160 goto exit;
1161
1162 sort_result(kvm);
1163 print_result(kvm);
1164
1165 exit:
1166 return ret;
1167 }
1168
1169 #define STRDUP_FAIL_EXIT(s) \
1170 ({ char *_p; \
1171 _p = strdup(s); \
1172 if (!_p) \
1173 return -ENOMEM; \
1174 _p; \
1175 })
1176
1177 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1178 {
1179 return 0;
1180 }
1181
1182 static int
1183 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1184 {
1185 unsigned int rec_argc, i, j, events_tp_size;
1186 const char **rec_argv;
1187 const char * const record_args[] = {
1188 "record",
1189 "-R",
1190 "-m", "1024",
1191 "-c", "1",
1192 };
1193 const char * const kvm_stat_record_usage[] = {
1194 "perf kvm stat record [<options>]",
1195 NULL
1196 };
1197 const char * const *events_tp;
1198 int ret;
1199
1200 events_tp_size = 0;
1201 ret = setup_kvm_events_tp(kvm);
1202 if (ret < 0) {
1203 pr_err("Unable to setup the kvm tracepoints\n");
1204 return ret;
1205 }
1206
1207 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1208 events_tp_size++;
1209
1210 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1211 2 * events_tp_size;
1212 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1213
1214 if (rec_argv == NULL)
1215 return -ENOMEM;
1216
1217 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1218 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1219
1220 for (j = 0; j < events_tp_size; j++) {
1221 rec_argv[i++] = "-e";
1222 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1223 }
1224
1225 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1226 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1227
1228 for (j = 1; j < (unsigned int)argc; j++, i++)
1229 rec_argv[i] = argv[j];
1230
1231 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1232 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1233 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1234
1235 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1244 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1245 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1246 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1247 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1248 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1249 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1250
1251 record_usage = kvm_stat_record_usage;
1252 return cmd_record(i, rec_argv);
1253 }
1254
1255 static int
1256 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1257 {
1258 const struct option kvm_events_report_options[] = {
1259 OPT_STRING(0, "event", &kvm->report_event, "report event",
1260 "event for reporting: vmexit, "
1261 "mmio (x86 only), ioport (x86 only)"),
1262 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1263 "vcpu id to report"),
1264 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1265 "key for sorting: sample(sort by samples number)"
1266 " time (sort by avg time)"),
1267 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1268 "analyze events only for given process id(s)"),
1269 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1270 OPT_END()
1271 };
1272
1273 const char * const kvm_events_report_usage[] = {
1274 "perf kvm stat report [<options>]",
1275 NULL
1276 };
1277
1278 if (argc) {
1279 argc = parse_options(argc, argv,
1280 kvm_events_report_options,
1281 kvm_events_report_usage, 0);
1282 if (argc)
1283 usage_with_options(kvm_events_report_usage,
1284 kvm_events_report_options);
1285 }
1286
1287 if (!kvm->opts.target.pid)
1288 kvm->opts.target.system_wide = true;
1289
1290 return kvm_events_report_vcpu(kvm);
1291 }
1292
1293 #ifdef HAVE_TIMERFD_SUPPORT
1294 static struct evlist *kvm_live_event_list(void)
1295 {
1296 struct evlist *evlist;
1297 char *tp, *name, *sys;
1298 int err = -1;
1299 const char * const *events_tp;
1300
1301 evlist = evlist__new();
1302 if (evlist == NULL)
1303 return NULL;
1304
1305 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1306
1307 tp = strdup(*events_tp);
1308 if (tp == NULL)
1309 goto out;
1310
1311 /* split tracepoint into subsystem and name */
1312 sys = tp;
1313 name = strchr(tp, ':');
1314 if (name == NULL) {
1315 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1316 *events_tp);
1317 free(tp);
1318 goto out;
1319 }
1320 *name = '\0';
1321 name++;
1322
1323 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1324 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1325 free(tp);
1326 goto out;
1327 }
1328
1329 free(tp);
1330 }
1331
1332 err = 0;
1333
1334 out:
1335 if (err) {
1336 evlist__delete(evlist);
1337 evlist = NULL;
1338 }
1339
1340 return evlist;
1341 }
1342
1343 static int kvm_events_live(struct perf_kvm_stat *kvm,
1344 int argc, const char **argv)
1345 {
1346 char errbuf[BUFSIZ];
1347 int err;
1348
1349 const struct option live_options[] = {
1350 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1351 "record events on existing process id"),
1352 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1353 "number of mmap data pages",
1354 perf_evlist__parse_mmap_pages),
1355 OPT_INCR('v', "verbose", &verbose,
1356 "be more verbose (show counter open errors, etc)"),
1357 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1358 "system-wide collection from all CPUs"),
1359 OPT_UINTEGER('d', "display", &kvm->display_time,
1360 "time in seconds between display updates"),
1361 OPT_STRING(0, "event", &kvm->report_event, "report event",
1362 "event for reporting: "
1363 "vmexit, mmio (x86 only), ioport (x86 only)"),
1364 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1365 "vcpu id to report"),
1366 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1367 "key for sorting: sample(sort by samples number)"
1368 " time (sort by avg time)"),
1369 OPT_U64(0, "duration", &kvm->duration,
1370 "show events other than"
1371 " HLT (x86 only) or Wait state (s390 only)"
1372 " that take longer than duration usecs"),
1373 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1374 "per thread proc mmap processing timeout in ms"),
1375 OPT_END()
1376 };
1377 const char * const live_usage[] = {
1378 "perf kvm stat live [<options>]",
1379 NULL
1380 };
1381 struct perf_data data = {
1382 .mode = PERF_DATA_MODE_WRITE,
1383 };
1384
1385
1386 /* event handling */
1387 kvm->tool.sample = process_sample_event;
1388 kvm->tool.comm = perf_event__process_comm;
1389 kvm->tool.exit = perf_event__process_exit;
1390 kvm->tool.fork = perf_event__process_fork;
1391 kvm->tool.lost = process_lost_event;
1392 kvm->tool.namespaces = perf_event__process_namespaces;
1393 kvm->tool.ordered_events = true;
1394 perf_tool__fill_defaults(&kvm->tool);
1395
1396 /* set defaults */
1397 kvm->display_time = 1;
1398 kvm->opts.user_interval = 1;
1399 kvm->opts.mmap_pages = 512;
1400 kvm->opts.target.uses_mmap = false;
1401 kvm->opts.target.uid_str = NULL;
1402 kvm->opts.target.uid = UINT_MAX;
1403
1404 symbol__init(NULL);
1405 disable_buildid_cache();
1406
1407 use_browser = 0;
1408
1409 if (argc) {
1410 argc = parse_options(argc, argv, live_options,
1411 live_usage, 0);
1412 if (argc)
1413 usage_with_options(live_usage, live_options);
1414 }
1415
1416 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1417
1418 /*
1419 * target related setups
1420 */
1421 err = target__validate(&kvm->opts.target);
1422 if (err) {
1423 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1424 ui__warning("%s", errbuf);
1425 }
1426
1427 if (target__none(&kvm->opts.target))
1428 kvm->opts.target.system_wide = true;
1429
1430
1431 /*
1432 * generate the event list
1433 */
1434 err = setup_kvm_events_tp(kvm);
1435 if (err < 0) {
1436 pr_err("Unable to setup the kvm tracepoints\n");
1437 return err;
1438 }
1439
1440 kvm->evlist = kvm_live_event_list();
1441 if (kvm->evlist == NULL) {
1442 err = -1;
1443 goto out;
1444 }
1445
1446 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1447 usage_with_options(live_usage, live_options);
1448
1449 /*
1450 * perf session
1451 */
1452 kvm->session = perf_session__new(&data, false, &kvm->tool);
1453 if (IS_ERR(kvm->session)) {
1454 err = PTR_ERR(kvm->session);
1455 goto out;
1456 }
1457 kvm->session->evlist = kvm->evlist;
1458 perf_session__set_id_hdr_size(kvm->session);
1459 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1460 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1461 kvm->evlist->core.threads, false, 1);
1462 err = kvm_live_open_events(kvm);
1463 if (err)
1464 goto out;
1465
1466 err = kvm_events_live_report(kvm);
1467
1468 out:
1469 perf_session__delete(kvm->session);
1470 kvm->session = NULL;
1471 evlist__delete(kvm->evlist);
1472
1473 return err;
1474 }
1475 #endif
1476
1477 static void print_kvm_stat_usage(void)
1478 {
1479 printf("Usage: perf kvm stat <command>\n\n");
1480
1481 printf("# Available commands:\n");
1482 printf("\trecord: record kvm events\n");
1483 printf("\treport: report statistical data of kvm events\n");
1484 printf("\tlive: live reporting of statistical data of kvm events\n");
1485
1486 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1487 }
1488
1489 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1490 {
1491 struct perf_kvm_stat kvm = {
1492 .file_name = file_name,
1493
1494 .trace_vcpu = -1,
1495 .report_event = "vmexit",
1496 .sort_key = "sample",
1497
1498 };
1499
1500 if (argc == 1) {
1501 print_kvm_stat_usage();
1502 goto perf_stat;
1503 }
1504
1505 if (!strncmp(argv[1], "rec", 3))
1506 return kvm_events_record(&kvm, argc - 1, argv + 1);
1507
1508 if (!strncmp(argv[1], "rep", 3))
1509 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1510
1511 #ifdef HAVE_TIMERFD_SUPPORT
1512 if (!strncmp(argv[1], "live", 4))
1513 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1514 #endif
1515
1516 perf_stat:
1517 return cmd_stat(argc, argv);
1518 }
1519 #endif /* HAVE_KVM_STAT_SUPPORT */
1520
1521 int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
1522 const char **argv __maybe_unused)
1523 {
1524 return 0;
1525 }
1526
1527 static int __cmd_record(const char *file_name, int argc, const char **argv)
1528 {
1529 int rec_argc, i = 0, j, ret;
1530 const char **rec_argv;
1531
1532 ret = kvm_add_default_arch_event(&argc, argv);
1533 if (ret)
1534 return -EINVAL;
1535
1536 rec_argc = argc + 2;
1537 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1538 rec_argv[i++] = strdup("record");
1539 rec_argv[i++] = strdup("-o");
1540 rec_argv[i++] = strdup(file_name);
1541 for (j = 1; j < argc; j++, i++)
1542 rec_argv[i] = argv[j];
1543
1544 BUG_ON(i != rec_argc);
1545
1546 return cmd_record(i, rec_argv);
1547 }
1548
1549 static int __cmd_report(const char *file_name, int argc, const char **argv)
1550 {
1551 int rec_argc, i = 0, j;
1552 const char **rec_argv;
1553
1554 rec_argc = argc + 2;
1555 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1556 rec_argv[i++] = strdup("report");
1557 rec_argv[i++] = strdup("-i");
1558 rec_argv[i++] = strdup(file_name);
1559 for (j = 1; j < argc; j++, i++)
1560 rec_argv[i] = argv[j];
1561
1562 BUG_ON(i != rec_argc);
1563
1564 return cmd_report(i, rec_argv);
1565 }
1566
1567 static int
1568 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1569 {
1570 int rec_argc, i = 0, j;
1571 const char **rec_argv;
1572
1573 rec_argc = argc + 2;
1574 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1575 rec_argv[i++] = strdup("buildid-list");
1576 rec_argv[i++] = strdup("-i");
1577 rec_argv[i++] = strdup(file_name);
1578 for (j = 1; j < argc; j++, i++)
1579 rec_argv[i] = argv[j];
1580
1581 BUG_ON(i != rec_argc);
1582
1583 return cmd_buildid_list(i, rec_argv);
1584 }
1585
1586 int cmd_kvm(int argc, const char **argv)
1587 {
1588 const char *file_name = NULL;
1589 const struct option kvm_options[] = {
1590 OPT_STRING('i', "input", &file_name, "file",
1591 "Input file name"),
1592 OPT_STRING('o', "output", &file_name, "file",
1593 "Output file name"),
1594 OPT_BOOLEAN(0, "guest", &perf_guest,
1595 "Collect guest os data"),
1596 OPT_BOOLEAN(0, "host", &perf_host,
1597 "Collect host os data"),
1598 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1599 "guest mount directory under which every guest os"
1600 " instance has a subdir"),
1601 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1602 "file", "file saving guest os vmlinux"),
1603 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1604 "file", "file saving guest os /proc/kallsyms"),
1605 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1606 "file", "file saving guest os /proc/modules"),
1607 OPT_INCR('v', "verbose", &verbose,
1608 "be more verbose (show counter open errors, etc)"),
1609 OPT_END()
1610 };
1611
1612 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1613 "buildid-list", "stat", NULL };
1614 const char *kvm_usage[] = { NULL, NULL };
1615
1616 perf_host = 0;
1617 perf_guest = 1;
1618
1619 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1620 PARSE_OPT_STOP_AT_NON_OPTION);
1621 if (!argc)
1622 usage_with_options(kvm_usage, kvm_options);
1623
1624 if (!perf_host)
1625 perf_guest = 1;
1626
1627 if (!file_name) {
1628 file_name = get_filename_for_perf_kvm();
1629
1630 if (!file_name) {
1631 pr_err("Failed to allocate memory for filename\n");
1632 return -ENOMEM;
1633 }
1634 }
1635
1636 if (!strncmp(argv[0], "rec", 3))
1637 return __cmd_record(file_name, argc, argv);
1638 else if (!strncmp(argv[0], "rep", 3))
1639 return __cmd_report(file_name, argc, argv);
1640 else if (!strncmp(argv[0], "diff", 4))
1641 return cmd_diff(argc, argv);
1642 else if (!strncmp(argv[0], "top", 3))
1643 return cmd_top(argc, argv);
1644 else if (!strncmp(argv[0], "buildid-list", 12))
1645 return __cmd_buildid_list(file_name, argc, argv);
1646 #ifdef HAVE_KVM_STAT_SUPPORT
1647 else if (!strncmp(argv[0], "stat", 4))
1648 return kvm_cmd_stat(file_name, argc, argv);
1649 #endif
1650 else
1651 usage_with_options(kvm_usage, kvm_options);
1652
1653 return 0;
1654 }
Linux with added FPC-III support