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