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 "util/parse-options.h"
14#include "util/trace-event.h"
15#include "util/debug.h"
16#include <lk/debugfs.h>
17#include "util/tool.h"
18#include "util/stat.h"
19#include "util/top.h"
20
21#include <sys/prctl.h>
22#include <sys/timerfd.h>
23
24#include <termios.h>
25#include <semaphore.h>
26#include <pthread.h>
27#include <math.h>
28
29#if defined(__i386__) || defined(__x86_64__)
30#include <asm/svm.h>
31#include <asm/vmx.h>
32#include <asm/kvm.h>
33
34struct event_key {
35 #define INVALID_KEY (~0ULL)
36 u64 key;
37 int info;
38};
39
40struct kvm_event_stats {
41 u64 time;
42 struct stats stats;
43};
44
45struct kvm_event {
46 struct list_head hash_entry;
47 struct rb_node rb;
48
49 struct event_key key;
50
51 struct kvm_event_stats total;
52
53 #define DEFAULT_VCPU_NUM 8
54 int max_vcpu;
55 struct kvm_event_stats *vcpu;
56};
57
58typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
59
60struct kvm_event_key {
61 const char *name;
62 key_cmp_fun key;
63};
64
65
66struct perf_kvm_stat;
67
68struct kvm_events_ops {
69 bool (*is_begin_event)(struct perf_evsel *evsel,
70 struct perf_sample *sample,
71 struct event_key *key);
72 bool (*is_end_event)(struct perf_evsel *evsel,
73 struct perf_sample *sample, struct event_key *key);
74 void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key,
75 char decode[20]);
76 const char *name;
77};
78
79struct exit_reasons_table {
80 unsigned long exit_code;
81 const char *reason;
82};
83
84#define EVENTS_BITS 12
85#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
86
87struct perf_kvm_stat {
88 struct perf_tool tool;
89 struct perf_record_opts opts;
90 struct perf_evlist *evlist;
91 struct perf_session *session;
92
93 const char *file_name;
94 const char *report_event;
95 const char *sort_key;
96 int trace_vcpu;
97
98 struct exit_reasons_table *exit_reasons;
99 int exit_reasons_size;
100 const char *exit_reasons_isa;
101
102 struct kvm_events_ops *events_ops;
103 key_cmp_fun compare;
104 struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
105
106 u64 total_time;
107 u64 total_count;
108 u64 lost_events;
109 u64 duration;
110
111 const char *pid_str;
112 struct intlist *pid_list;
113
114 struct rb_root result;
115
116 int timerfd;
117 unsigned int display_time;
118 bool live;
119};
120
121
122static void exit_event_get_key(struct perf_evsel *evsel,
123 struct perf_sample *sample,
124 struct event_key *key)
125{
126 key->info = 0;
127 key->key = perf_evsel__intval(evsel, sample, "exit_reason");
128}
129
130static bool kvm_exit_event(struct perf_evsel *evsel)
131{
132 return !strcmp(evsel->name, "kvm:kvm_exit");
133}
134
135static bool exit_event_begin(struct perf_evsel *evsel,
136 struct perf_sample *sample, struct event_key *key)
137{
138 if (kvm_exit_event(evsel)) {
139 exit_event_get_key(evsel, sample, key);
140 return true;
141 }
142
143 return false;
144}
145
146static bool kvm_entry_event(struct perf_evsel *evsel)
147{
148 return !strcmp(evsel->name, "kvm:kvm_entry");
149}
150
151static bool exit_event_end(struct perf_evsel *evsel,
152 struct perf_sample *sample __maybe_unused,
153 struct event_key *key __maybe_unused)
154{
155 return kvm_entry_event(evsel);
156}
157
158static struct exit_reasons_table vmx_exit_reasons[] = {
159 VMX_EXIT_REASONS
160};
161
162static struct exit_reasons_table svm_exit_reasons[] = {
163 SVM_EXIT_REASONS
164};
165
166static const char *get_exit_reason(struct perf_kvm_stat *kvm, u64 exit_code)
167{
168 int i = kvm->exit_reasons_size;
169 struct exit_reasons_table *tbl = kvm->exit_reasons;
170
171 while (i--) {
172 if (tbl->exit_code == exit_code)
173 return tbl->reason;
174 tbl++;
175 }
176
177 pr_err("unknown kvm exit code:%lld on %s\n",
178 (unsigned long long)exit_code, kvm->exit_reasons_isa);
179 return "UNKNOWN";
180}
181
182static void exit_event_decode_key(struct perf_kvm_stat *kvm,
183 struct event_key *key,
184 char decode[20])
185{
186 const char *exit_reason = get_exit_reason(kvm, key->key);
187
188 scnprintf(decode, 20, "%s", exit_reason);
189}
190
191static struct kvm_events_ops exit_events = {
192 .is_begin_event = exit_event_begin,
193 .is_end_event = exit_event_end,
194 .decode_key = exit_event_decode_key,
195 .name = "VM-EXIT"
196};
197
198
199
200
201
202
203static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample,
204 struct event_key *key)
205{
206 key->key = perf_evsel__intval(evsel, sample, "gpa");
207 key->info = perf_evsel__intval(evsel, sample, "type");
208}
209
210#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
211#define KVM_TRACE_MMIO_READ 1
212#define KVM_TRACE_MMIO_WRITE 2
213
214static bool mmio_event_begin(struct perf_evsel *evsel,
215 struct perf_sample *sample, struct event_key *key)
216{
217
218 if (kvm_exit_event(evsel))
219 return true;
220
221
222 if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
223 perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
224 mmio_event_get_key(evsel, sample, key);
225 return true;
226 }
227
228 return false;
229}
230
231static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample,
232 struct event_key *key)
233{
234
235 if (kvm_entry_event(evsel))
236 return true;
237
238
239 if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
240 perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
241 mmio_event_get_key(evsel, sample, key);
242 return true;
243 }
244
245 return false;
246}
247
248static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
249 struct event_key *key,
250 char decode[20])
251{
252 scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key,
253 key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
254}
255
256static struct kvm_events_ops mmio_events = {
257 .is_begin_event = mmio_event_begin,
258 .is_end_event = mmio_event_end,
259 .decode_key = mmio_event_decode_key,
260 .name = "MMIO Access"
261};
262
263
264static void ioport_event_get_key(struct perf_evsel *evsel,
265 struct perf_sample *sample,
266 struct event_key *key)
267{
268 key->key = perf_evsel__intval(evsel, sample, "port");
269 key->info = perf_evsel__intval(evsel, sample, "rw");
270}
271
272static bool ioport_event_begin(struct perf_evsel *evsel,
273 struct perf_sample *sample,
274 struct event_key *key)
275{
276 if (!strcmp(evsel->name, "kvm:kvm_pio")) {
277 ioport_event_get_key(evsel, sample, key);
278 return true;
279 }
280
281 return false;
282}
283
284static bool ioport_event_end(struct perf_evsel *evsel,
285 struct perf_sample *sample __maybe_unused,
286 struct event_key *key __maybe_unused)
287{
288 return kvm_entry_event(evsel);
289}
290
291static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
292 struct event_key *key,
293 char decode[20])
294{
295 scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key,
296 key->info ? "POUT" : "PIN");
297}
298
299static struct kvm_events_ops ioport_events = {
300 .is_begin_event = ioport_event_begin,
301 .is_end_event = ioport_event_end,
302 .decode_key = ioport_event_decode_key,
303 .name = "IO Port Access"
304};
305
306static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
307{
308 bool ret = true;
309
310 if (!strcmp(kvm->report_event, "vmexit"))
311 kvm->events_ops = &exit_events;
312 else if (!strcmp(kvm->report_event, "mmio"))
313 kvm->events_ops = &mmio_events;
314 else if (!strcmp(kvm->report_event, "ioport"))
315 kvm->events_ops = &ioport_events;
316 else {
317 pr_err("Unknown report event:%s\n", kvm->report_event);
318 ret = false;
319 }
320
321 return ret;
322}
323
324struct vcpu_event_record {
325 int vcpu_id;
326 u64 start_time;
327 struct kvm_event *last_event;
328};
329
330
331static void init_kvm_event_record(struct perf_kvm_stat *kvm)
332{
333 unsigned int i;
334
335 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
336 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
337}
338
339static void clear_events_cache_stats(struct list_head *kvm_events_cache)
340{
341 struct list_head *head;
342 struct kvm_event *event;
343 unsigned int i;
344 int j;
345
346 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
347 head = &kvm_events_cache[i];
348 list_for_each_entry(event, head, hash_entry) {
349
350 event->total.time = 0;
351 init_stats(&event->total.stats);
352
353 for (j = 0; j < event->max_vcpu; ++j) {
354 event->vcpu[j].time = 0;
355 init_stats(&event->vcpu[j].stats);
356 }
357 }
358 }
359}
360
361static int kvm_events_hash_fn(u64 key)
362{
363 return key & (EVENTS_CACHE_SIZE - 1);
364}
365
366static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
367{
368 int old_max_vcpu = event->max_vcpu;
369 void *prev;
370
371 if (vcpu_id < event->max_vcpu)
372 return true;
373
374 while (event->max_vcpu <= vcpu_id)
375 event->max_vcpu += DEFAULT_VCPU_NUM;
376
377 prev = event->vcpu;
378 event->vcpu = realloc(event->vcpu,
379 event->max_vcpu * sizeof(*event->vcpu));
380 if (!event->vcpu) {
381 free(prev);
382 pr_err("Not enough memory\n");
383 return false;
384 }
385
386 memset(event->vcpu + old_max_vcpu, 0,
387 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
388 return true;
389}
390
391static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
392{
393 struct kvm_event *event;
394
395 event = zalloc(sizeof(*event));
396 if (!event) {
397 pr_err("Not enough memory\n");
398 return NULL;
399 }
400
401 event->key = *key;
402 return event;
403}
404
405static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
406 struct event_key *key)
407{
408 struct kvm_event *event;
409 struct list_head *head;
410
411 BUG_ON(key->key == INVALID_KEY);
412
413 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
414 list_for_each_entry(event, head, hash_entry) {
415 if (event->key.key == key->key && event->key.info == key->info)
416 return event;
417 }
418
419 event = kvm_alloc_init_event(key);
420 if (!event)
421 return NULL;
422
423 list_add(&event->hash_entry, head);
424 return event;
425}
426
427static bool handle_begin_event(struct perf_kvm_stat *kvm,
428 struct vcpu_event_record *vcpu_record,
429 struct event_key *key, u64 timestamp)
430{
431 struct kvm_event *event = NULL;
432
433 if (key->key != INVALID_KEY)
434 event = find_create_kvm_event(kvm, key);
435
436 vcpu_record->last_event = event;
437 vcpu_record->start_time = timestamp;
438 return true;
439}
440
441static void
442kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
443{
444 kvm_stats->time += time_diff;
445 update_stats(&kvm_stats->stats, time_diff);
446}
447
448static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
449{
450 struct kvm_event_stats *kvm_stats = &event->total;
451
452 if (vcpu_id != -1)
453 kvm_stats = &event->vcpu[vcpu_id];
454
455 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
456 avg_stats(&kvm_stats->stats));
457}
458
459static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
460 u64 time_diff)
461{
462 if (vcpu_id == -1) {
463 kvm_update_event_stats(&event->total, time_diff);
464 return true;
465 }
466
467 if (!kvm_event_expand(event, vcpu_id))
468 return false;
469
470 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
471 return true;
472}
473
474static bool handle_end_event(struct perf_kvm_stat *kvm,
475 struct vcpu_event_record *vcpu_record,
476 struct event_key *key,
477 struct perf_sample *sample)
478{
479 struct kvm_event *event;
480 u64 time_begin, time_diff;
481 int vcpu;
482
483 if (kvm->trace_vcpu == -1)
484 vcpu = -1;
485 else
486 vcpu = vcpu_record->vcpu_id;
487
488 event = vcpu_record->last_event;
489 time_begin = vcpu_record->start_time;
490
491
492 if (!time_begin)
493 return true;
494
495
496
497
498
499
500
501 if (!event && key->key == INVALID_KEY)
502 return true;
503
504 if (!event)
505 event = find_create_kvm_event(kvm, key);
506
507 if (!event)
508 return false;
509
510 vcpu_record->last_event = NULL;
511 vcpu_record->start_time = 0;
512
513
514 if (sample->time < time_begin) {
515 pr_debug("End time before begin time; skipping event.\n");
516 return true;
517 }
518
519 time_diff = sample->time - time_begin;
520
521 if (kvm->duration && time_diff > kvm->duration) {
522 char decode[32];
523
524 kvm->events_ops->decode_key(kvm, &event->key, decode);
525 if (strcmp(decode, "HLT")) {
526 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
527 sample->time, sample->pid, vcpu_record->vcpu_id,
528 decode, time_diff/1000);
529 }
530 }
531
532 return update_kvm_event(event, vcpu, time_diff);
533}
534
535static
536struct vcpu_event_record *per_vcpu_record(struct thread *thread,
537 struct perf_evsel *evsel,
538 struct perf_sample *sample)
539{
540
541 if (!thread->priv && kvm_entry_event(evsel)) {
542 struct vcpu_event_record *vcpu_record;
543
544 vcpu_record = zalloc(sizeof(*vcpu_record));
545 if (!vcpu_record) {
546 pr_err("%s: Not enough memory\n", __func__);
547 return NULL;
548 }
549
550 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, "vcpu_id");
551 thread->priv = vcpu_record;
552 }
553
554 return thread->priv;
555}
556
557static bool handle_kvm_event(struct perf_kvm_stat *kvm,
558 struct thread *thread,
559 struct perf_evsel *evsel,
560 struct perf_sample *sample)
561{
562 struct vcpu_event_record *vcpu_record;
563 struct event_key key = {.key = INVALID_KEY};
564
565 vcpu_record = per_vcpu_record(thread, evsel, sample);
566 if (!vcpu_record)
567 return true;
568
569
570 if ((kvm->trace_vcpu != -1) &&
571 (kvm->trace_vcpu != vcpu_record->vcpu_id))
572 return true;
573
574 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
575 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
576
577 if (kvm->events_ops->is_end_event(evsel, sample, &key))
578 return handle_end_event(kvm, vcpu_record, &key, sample);
579
580 return true;
581}
582
583#define GET_EVENT_KEY(func, field) \
584static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
585{ \
586 if (vcpu == -1) \
587 return event->total.field; \
588 \
589 if (vcpu >= event->max_vcpu) \
590 return 0; \
591 \
592 return event->vcpu[vcpu].field; \
593}
594
595#define COMPARE_EVENT_KEY(func, field) \
596GET_EVENT_KEY(func, field) \
597static int compare_kvm_event_ ## func(struct kvm_event *one, \
598 struct kvm_event *two, int vcpu)\
599{ \
600 return get_event_ ##func(one, vcpu) > \
601 get_event_ ##func(two, vcpu); \
602}
603
604GET_EVENT_KEY(time, time);
605COMPARE_EVENT_KEY(count, stats.n);
606COMPARE_EVENT_KEY(mean, stats.mean);
607GET_EVENT_KEY(max, stats.max);
608GET_EVENT_KEY(min, stats.min);
609
610#define DEF_SORT_NAME_KEY(name, compare_key) \
611 { #name, compare_kvm_event_ ## compare_key }
612
613static struct kvm_event_key keys[] = {
614 DEF_SORT_NAME_KEY(sample, count),
615 DEF_SORT_NAME_KEY(time, mean),
616 { NULL, NULL }
617};
618
619static bool select_key(struct perf_kvm_stat *kvm)
620{
621 int i;
622
623 for (i = 0; keys[i].name; i++) {
624 if (!strcmp(keys[i].name, kvm->sort_key)) {
625 kvm->compare = keys[i].key;
626 return true;
627 }
628 }
629
630 pr_err("Unknown compare key:%s\n", kvm->sort_key);
631 return false;
632}
633
634static void insert_to_result(struct rb_root *result, struct kvm_event *event,
635 key_cmp_fun bigger, int vcpu)
636{
637 struct rb_node **rb = &result->rb_node;
638 struct rb_node *parent = NULL;
639 struct kvm_event *p;
640
641 while (*rb) {
642 p = container_of(*rb, struct kvm_event, rb);
643 parent = *rb;
644
645 if (bigger(event, p, vcpu))
646 rb = &(*rb)->rb_left;
647 else
648 rb = &(*rb)->rb_right;
649 }
650
651 rb_link_node(&event->rb, parent, rb);
652 rb_insert_color(&event->rb, result);
653}
654
655static void
656update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
657{
658 int vcpu = kvm->trace_vcpu;
659
660 kvm->total_count += get_event_count(event, vcpu);
661 kvm->total_time += get_event_time(event, vcpu);
662}
663
664static bool event_is_valid(struct kvm_event *event, int vcpu)
665{
666 return !!get_event_count(event, vcpu);
667}
668
669static void sort_result(struct perf_kvm_stat *kvm)
670{
671 unsigned int i;
672 int vcpu = kvm->trace_vcpu;
673 struct kvm_event *event;
674
675 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
676 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
677 if (event_is_valid(event, vcpu)) {
678 update_total_count(kvm, event);
679 insert_to_result(&kvm->result, event,
680 kvm->compare, vcpu);
681 }
682 }
683 }
684}
685
686
687static struct kvm_event *pop_from_result(struct rb_root *result)
688{
689 struct rb_node *node = rb_first(result);
690
691 if (!node)
692 return NULL;
693
694 rb_erase(node, result);
695 return container_of(node, struct kvm_event, rb);
696}
697
698static void print_vcpu_info(struct perf_kvm_stat *kvm)
699{
700 int vcpu = kvm->trace_vcpu;
701
702 pr_info("Analyze events for ");
703
704 if (kvm->live) {
705 if (kvm->opts.target.system_wide)
706 pr_info("all VMs, ");
707 else if (kvm->opts.target.pid)
708 pr_info("pid(s) %s, ", kvm->opts.target.pid);
709 else
710 pr_info("dazed and confused on what is monitored, ");
711 }
712
713 if (vcpu == -1)
714 pr_info("all VCPUs:\n\n");
715 else
716 pr_info("VCPU %d:\n\n", vcpu);
717}
718
719static void show_timeofday(void)
720{
721 char date[64];
722 struct timeval tv;
723 struct tm ltime;
724
725 gettimeofday(&tv, NULL);
726 if (localtime_r(&tv.tv_sec, <ime)) {
727 strftime(date, sizeof(date), "%H:%M:%S", <ime);
728 pr_info("%s.%06ld", date, tv.tv_usec);
729 } else
730 pr_info("00:00:00.000000");
731
732 return;
733}
734
735static void print_result(struct perf_kvm_stat *kvm)
736{
737 char decode[20];
738 struct kvm_event *event;
739 int vcpu = kvm->trace_vcpu;
740
741 if (kvm->live) {
742 puts(CONSOLE_CLEAR);
743 show_timeofday();
744 }
745
746 pr_info("\n\n");
747 print_vcpu_info(kvm);
748 pr_info("%20s ", kvm->events_ops->name);
749 pr_info("%10s ", "Samples");
750 pr_info("%9s ", "Samples%");
751
752 pr_info("%9s ", "Time%");
753 pr_info("%10s ", "Min Time");
754 pr_info("%10s ", "Max Time");
755 pr_info("%16s ", "Avg time");
756 pr_info("\n\n");
757
758 while ((event = pop_from_result(&kvm->result))) {
759 u64 ecount, etime, max, min;
760
761 ecount = get_event_count(event, vcpu);
762 etime = get_event_time(event, vcpu);
763 max = get_event_max(event, vcpu);
764 min = get_event_min(event, vcpu);
765
766 kvm->events_ops->decode_key(kvm, &event->key, decode);
767 pr_info("%20s ", decode);
768 pr_info("%10llu ", (unsigned long long)ecount);
769 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
770 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
771 pr_info("%8" PRIu64 "us ", min / 1000);
772 pr_info("%8" PRIu64 "us ", max / 1000);
773 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
774 kvm_event_rel_stddev(vcpu, event));
775 pr_info("\n");
776 }
777
778 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
779 kvm->total_count, kvm->total_time / 1e3);
780
781 if (kvm->lost_events)
782 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
783}
784
785static int process_lost_event(struct perf_tool *tool,
786 union perf_event *event __maybe_unused,
787 struct perf_sample *sample __maybe_unused,
788 struct machine *machine __maybe_unused)
789{
790 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
791
792 kvm->lost_events++;
793 return 0;
794}
795
796static bool skip_sample(struct perf_kvm_stat *kvm,
797 struct perf_sample *sample)
798{
799 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
800 return true;
801
802 return false;
803}
804
805static int process_sample_event(struct perf_tool *tool,
806 union perf_event *event,
807 struct perf_sample *sample,
808 struct perf_evsel *evsel,
809 struct machine *machine)
810{
811 struct thread *thread;
812 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
813 tool);
814
815 if (skip_sample(kvm, sample))
816 return 0;
817
818 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
819 if (thread == NULL) {
820 pr_debug("problem processing %d event, skipping it.\n",
821 event->header.type);
822 return -1;
823 }
824
825 if (!handle_kvm_event(kvm, thread, evsel, sample))
826 return -1;
827
828 return 0;
829}
830
831static int cpu_isa_config(struct perf_kvm_stat *kvm)
832{
833 char buf[64], *cpuid;
834 int err, isa;
835
836 if (kvm->live) {
837 err = get_cpuid(buf, sizeof(buf));
838 if (err != 0) {
839 pr_err("Failed to look up CPU type (Intel or AMD)\n");
840 return err;
841 }
842 cpuid = buf;
843 } else
844 cpuid = kvm->session->header.env.cpuid;
845
846 if (strstr(cpuid, "Intel"))
847 isa = 1;
848 else if (strstr(cpuid, "AMD"))
849 isa = 0;
850 else {
851 pr_err("CPU %s is not supported.\n", cpuid);
852 return -ENOTSUP;
853 }
854
855 if (isa == 1) {
856 kvm->exit_reasons = vmx_exit_reasons;
857 kvm->exit_reasons_size = ARRAY_SIZE(vmx_exit_reasons);
858 kvm->exit_reasons_isa = "VMX";
859 }
860
861 return 0;
862}
863
864static bool verify_vcpu(int vcpu)
865{
866 if (vcpu != -1 && vcpu < 0) {
867 pr_err("Invalid vcpu:%d.\n", vcpu);
868 return false;
869 }
870
871 return true;
872}
873
874
875
876
877#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
878
879static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
880 u64 *mmap_time)
881{
882 union perf_event *event;
883 struct perf_sample sample;
884 s64 n = 0;
885 int err;
886
887 *mmap_time = ULLONG_MAX;
888 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
889 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
890 if (err) {
891 perf_evlist__mmap_consume(kvm->evlist, idx);
892 pr_err("Failed to parse sample\n");
893 return -1;
894 }
895
896 err = perf_session_queue_event(kvm->session, event, &sample, 0);
897
898
899
900
901 perf_evlist__mmap_consume(kvm->evlist, idx);
902
903 if (err) {
904 pr_err("Failed to enqueue sample: %d\n", err);
905 return -1;
906 }
907
908
909 if (n == 0)
910 *mmap_time = sample.time;
911
912
913 n++;
914 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
915 break;
916 }
917
918 return n;
919}
920
921static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
922{
923 int i, err, throttled = 0;
924 s64 n, ntotal = 0;
925 u64 flush_time = ULLONG_MAX, mmap_time;
926
927 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
928 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
929 if (n < 0)
930 return -1;
931
932
933
934
935
936
937
938
939 if (mmap_time < flush_time)
940 flush_time = mmap_time;
941
942 ntotal += n;
943 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
944 throttled = 1;
945 }
946
947
948 if (ntotal) {
949 kvm->session->ordered_samples.next_flush = flush_time;
950 err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session);
951 if (err) {
952 if (kvm->lost_events)
953 pr_info("\nLost events: %" PRIu64 "\n\n",
954 kvm->lost_events);
955 return err;
956 }
957 }
958
959 return throttled;
960}
961
962static volatile int done;
963
964static void sig_handler(int sig __maybe_unused)
965{
966 done = 1;
967}
968
969static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
970{
971 struct itimerspec new_value;
972 int rc = -1;
973
974 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
975 if (kvm->timerfd < 0) {
976 pr_err("timerfd_create failed\n");
977 goto out;
978 }
979
980 new_value.it_value.tv_sec = kvm->display_time;
981 new_value.it_value.tv_nsec = 0;
982 new_value.it_interval.tv_sec = kvm->display_time;
983 new_value.it_interval.tv_nsec = 0;
984
985 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
986 pr_err("timerfd_settime failed: %d\n", errno);
987 close(kvm->timerfd);
988 goto out;
989 }
990
991 rc = 0;
992out:
993 return rc;
994}
995
996static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
997{
998 uint64_t c;
999 int rc;
1000
1001 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
1002 if (rc < 0) {
1003 if (errno == EAGAIN)
1004 return 0;
1005
1006 pr_err("Failed to read timer fd: %d\n", errno);
1007 return -1;
1008 }
1009
1010 if (rc != sizeof(uint64_t)) {
1011 pr_err("Error reading timer fd - invalid size returned\n");
1012 return -1;
1013 }
1014
1015 if (c != 1)
1016 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
1017
1018
1019 sort_result(kvm);
1020 print_result(kvm);
1021
1022
1023 clear_events_cache_stats(kvm->kvm_events_cache);
1024 kvm->total_count = 0;
1025 kvm->total_time = 0;
1026 kvm->lost_events = 0;
1027
1028 return 0;
1029}
1030
1031static int fd_set_nonblock(int fd)
1032{
1033 long arg = 0;
1034
1035 arg = fcntl(fd, F_GETFL);
1036 if (arg < 0) {
1037 pr_err("Failed to get current flags for fd %d\n", fd);
1038 return -1;
1039 }
1040
1041 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
1042 pr_err("Failed to set non-block option on fd %d\n", fd);
1043 return -1;
1044 }
1045
1046 return 0;
1047}
1048
1049static
1050int perf_kvm__handle_stdin(struct termios *tc_now, struct termios *tc_save)
1051{
1052 int c;
1053
1054 tcsetattr(0, TCSANOW, tc_now);
1055 c = getc(stdin);
1056 tcsetattr(0, TCSAFLUSH, tc_save);
1057
1058 if (c == 'q')
1059 return 1;
1060
1061 return 0;
1062}
1063
1064static int kvm_events_live_report(struct perf_kvm_stat *kvm)
1065{
1066 struct pollfd *pollfds = NULL;
1067 int nr_fds, nr_stdin, ret, err = -EINVAL;
1068 struct termios tc, save;
1069
1070
1071 kvm->live = true;
1072
1073 ret = cpu_isa_config(kvm);
1074 if (ret < 0)
1075 return ret;
1076
1077 if (!verify_vcpu(kvm->trace_vcpu) ||
1078 !select_key(kvm) ||
1079 !register_kvm_events_ops(kvm)) {
1080 goto out;
1081 }
1082
1083 init_kvm_event_record(kvm);
1084
1085 tcgetattr(0, &save);
1086 tc = save;
1087 tc.c_lflag &= ~(ICANON | ECHO);
1088 tc.c_cc[VMIN] = 0;
1089 tc.c_cc[VTIME] = 0;
1090
1091 signal(SIGINT, sig_handler);
1092 signal(SIGTERM, sig_handler);
1093
1094
1095 nr_fds = kvm->evlist->nr_fds;
1096 pollfds = zalloc(sizeof(struct pollfd) * (nr_fds + 2));
1097 if (!pollfds) {
1098 err = -ENOMEM;
1099 goto out;
1100 }
1101 memcpy(pollfds, kvm->evlist->pollfd,
1102 sizeof(struct pollfd) * kvm->evlist->nr_fds);
1103
1104
1105 if (perf_kvm__timerfd_create(kvm) < 0) {
1106 err = -1;
1107 goto out;
1108 }
1109
1110 pollfds[nr_fds].fd = kvm->timerfd;
1111 pollfds[nr_fds].events = POLLIN;
1112 nr_fds++;
1113
1114 pollfds[nr_fds].fd = fileno(stdin);
1115 pollfds[nr_fds].events = POLLIN;
1116 nr_stdin = nr_fds;
1117 nr_fds++;
1118 if (fd_set_nonblock(fileno(stdin)) != 0)
1119 goto out;
1120
1121
1122 perf_evlist__enable(kvm->evlist);
1123
1124 while (!done) {
1125 int rc;
1126
1127 rc = perf_kvm__mmap_read(kvm);
1128 if (rc < 0)
1129 break;
1130
1131 err = perf_kvm__handle_timerfd(kvm);
1132 if (err)
1133 goto out;
1134
1135 if (pollfds[nr_stdin].revents & POLLIN)
1136 done = perf_kvm__handle_stdin(&tc, &save);
1137
1138 if (!rc && !done)
1139 err = poll(pollfds, nr_fds, 100);
1140 }
1141
1142 perf_evlist__disable(kvm->evlist);
1143
1144 if (err == 0) {
1145 sort_result(kvm);
1146 print_result(kvm);
1147 }
1148
1149out:
1150 if (kvm->timerfd >= 0)
1151 close(kvm->timerfd);
1152
1153 if (pollfds)
1154 free(pollfds);
1155
1156 return err;
1157}
1158
1159static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1160{
1161 int err, rc = -1;
1162 struct perf_evsel *pos;
1163 struct perf_evlist *evlist = kvm->evlist;
1164
1165 perf_evlist__config(evlist, &kvm->opts);
1166
1167
1168
1169
1170
1171 list_for_each_entry(pos, &evlist->entries, node) {
1172 struct perf_event_attr *attr = &pos->attr;
1173
1174
1175 perf_evsel__set_sample_bit(pos, TID);
1176 perf_evsel__set_sample_bit(pos, TIME);
1177 perf_evsel__set_sample_bit(pos, CPU);
1178 perf_evsel__set_sample_bit(pos, RAW);
1179
1180 perf_evsel__reset_sample_bit(pos, PERIOD);
1181 perf_evsel__reset_sample_bit(pos, IP);
1182 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1183 perf_evsel__reset_sample_bit(pos, ADDR);
1184 perf_evsel__reset_sample_bit(pos, READ);
1185 attr->mmap = 0;
1186 attr->comm = 0;
1187 attr->task = 0;
1188
1189 attr->sample_period = 1;
1190
1191 attr->watermark = 0;
1192 attr->wakeup_events = 1000;
1193
1194
1195 attr->disabled = 1;
1196 }
1197
1198 err = perf_evlist__open(evlist);
1199 if (err < 0) {
1200 printf("Couldn't create the events: %s\n", strerror(errno));
1201 goto out;
1202 }
1203
1204 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1205 ui__error("Failed to mmap the events: %s\n", strerror(errno));
1206 perf_evlist__close(evlist);
1207 goto out;
1208 }
1209
1210 rc = 0;
1211
1212out:
1213 return rc;
1214}
1215
1216static int read_events(struct perf_kvm_stat *kvm)
1217{
1218 int ret;
1219
1220 struct perf_tool eops = {
1221 .sample = process_sample_event,
1222 .comm = perf_event__process_comm,
1223 .ordered_samples = true,
1224 };
1225
1226 kvm->tool = eops;
1227 kvm->session = perf_session__new(kvm->file_name, O_RDONLY, 0, false,
1228 &kvm->tool);
1229 if (!kvm->session) {
1230 pr_err("Initializing perf session failed\n");
1231 return -EINVAL;
1232 }
1233
1234 if (!perf_session__has_traces(kvm->session, "kvm record"))
1235 return -EINVAL;
1236
1237
1238
1239
1240
1241 ret = cpu_isa_config(kvm);
1242 if (ret < 0)
1243 return ret;
1244
1245 return perf_session__process_events(kvm->session, &kvm->tool);
1246}
1247
1248static int parse_target_str(struct perf_kvm_stat *kvm)
1249{
1250 if (kvm->pid_str) {
1251 kvm->pid_list = intlist__new(kvm->pid_str);
1252 if (kvm->pid_list == NULL) {
1253 pr_err("Error parsing process id string\n");
1254 return -EINVAL;
1255 }
1256 }
1257
1258 return 0;
1259}
1260
1261static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1262{
1263 int ret = -EINVAL;
1264 int vcpu = kvm->trace_vcpu;
1265
1266 if (parse_target_str(kvm) != 0)
1267 goto exit;
1268
1269 if (!verify_vcpu(vcpu))
1270 goto exit;
1271
1272 if (!select_key(kvm))
1273 goto exit;
1274
1275 if (!register_kvm_events_ops(kvm))
1276 goto exit;
1277
1278 init_kvm_event_record(kvm);
1279 setup_pager();
1280
1281 ret = read_events(kvm);
1282 if (ret)
1283 goto exit;
1284
1285 sort_result(kvm);
1286 print_result(kvm);
1287
1288exit:
1289 return ret;
1290}
1291
1292static const char * const kvm_events_tp[] = {
1293 "kvm:kvm_entry",
1294 "kvm:kvm_exit",
1295 "kvm:kvm_mmio",
1296 "kvm:kvm_pio",
1297};
1298
1299#define STRDUP_FAIL_EXIT(s) \
1300 ({ char *_p; \
1301 _p = strdup(s); \
1302 if (!_p) \
1303 return -ENOMEM; \
1304 _p; \
1305 })
1306
1307static int
1308kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1309{
1310 unsigned int rec_argc, i, j;
1311 const char **rec_argv;
1312 const char * const record_args[] = {
1313 "record",
1314 "-R",
1315 "-m", "1024",
1316 "-c", "1",
1317 };
1318
1319 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1320 2 * ARRAY_SIZE(kvm_events_tp);
1321 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1322
1323 if (rec_argv == NULL)
1324 return -ENOMEM;
1325
1326 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1327 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1328
1329 for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) {
1330 rec_argv[i++] = "-e";
1331 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1332 }
1333
1334 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1335 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1336
1337 for (j = 1; j < (unsigned int)argc; j++, i++)
1338 rec_argv[i] = argv[j];
1339
1340 return cmd_record(i, rec_argv, NULL);
1341}
1342
1343static int
1344kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1345{
1346 const struct option kvm_events_report_options[] = {
1347 OPT_STRING(0, "event", &kvm->report_event, "report event",
1348 "event for reporting: vmexit, mmio, ioport"),
1349 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1350 "vcpu id to report"),
1351 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1352 "key for sorting: sample(sort by samples number)"
1353 " time (sort by avg time)"),
1354 OPT_STRING('p', "pid", &kvm->pid_str, "pid",
1355 "analyze events only for given process id(s)"),
1356 OPT_END()
1357 };
1358
1359 const char * const kvm_events_report_usage[] = {
1360 "perf kvm stat report [<options>]",
1361 NULL
1362 };
1363
1364 symbol__init();
1365
1366 if (argc) {
1367 argc = parse_options(argc, argv,
1368 kvm_events_report_options,
1369 kvm_events_report_usage, 0);
1370 if (argc)
1371 usage_with_options(kvm_events_report_usage,
1372 kvm_events_report_options);
1373 }
1374
1375 return kvm_events_report_vcpu(kvm);
1376}
1377
1378static struct perf_evlist *kvm_live_event_list(void)
1379{
1380 struct perf_evlist *evlist;
1381 char *tp, *name, *sys;
1382 unsigned int j;
1383 int err = -1;
1384
1385 evlist = perf_evlist__new();
1386 if (evlist == NULL)
1387 return NULL;
1388
1389 for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) {
1390
1391 tp = strdup(kvm_events_tp[j]);
1392 if (tp == NULL)
1393 goto out;
1394
1395
1396 sys = tp;
1397 name = strchr(tp, ':');
1398 if (name == NULL) {
1399 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1400 kvm_events_tp[j]);
1401 free(tp);
1402 goto out;
1403 }
1404 *name = '\0';
1405 name++;
1406
1407 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1408 pr_err("Failed to add %s tracepoint to the list\n", kvm_events_tp[j]);
1409 free(tp);
1410 goto out;
1411 }
1412
1413 free(tp);
1414 }
1415
1416 err = 0;
1417
1418out:
1419 if (err) {
1420 perf_evlist__delete(evlist);
1421 evlist = NULL;
1422 }
1423
1424 return evlist;
1425}
1426
1427static int kvm_events_live(struct perf_kvm_stat *kvm,
1428 int argc, const char **argv)
1429{
1430 char errbuf[BUFSIZ];
1431 int err;
1432
1433 const struct option live_options[] = {
1434 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1435 "record events on existing process id"),
1436 OPT_UINTEGER('m', "mmap-pages", &kvm->opts.mmap_pages,
1437 "number of mmap data pages"),
1438 OPT_INCR('v', "verbose", &verbose,
1439 "be more verbose (show counter open errors, etc)"),
1440 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1441 "system-wide collection from all CPUs"),
1442 OPT_UINTEGER('d', "display", &kvm->display_time,
1443 "time in seconds between display updates"),
1444 OPT_STRING(0, "event", &kvm->report_event, "report event",
1445 "event for reporting: vmexit, mmio, ioport"),
1446 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1447 "vcpu id to report"),
1448 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1449 "key for sorting: sample(sort by samples number)"
1450 " time (sort by avg time)"),
1451 OPT_U64(0, "duration", &kvm->duration,
1452 "show events other than HALT that take longer than duration usecs"),
1453 OPT_END()
1454 };
1455 const char * const live_usage[] = {
1456 "perf kvm stat live [<options>]",
1457 NULL
1458 };
1459
1460
1461
1462 kvm->tool.sample = process_sample_event;
1463 kvm->tool.comm = perf_event__process_comm;
1464 kvm->tool.exit = perf_event__process_exit;
1465 kvm->tool.fork = perf_event__process_fork;
1466 kvm->tool.lost = process_lost_event;
1467 kvm->tool.ordered_samples = true;
1468 perf_tool__fill_defaults(&kvm->tool);
1469
1470
1471 kvm->display_time = 1;
1472 kvm->opts.user_interval = 1;
1473 kvm->opts.mmap_pages = 512;
1474 kvm->opts.target.uses_mmap = false;
1475 kvm->opts.target.uid_str = NULL;
1476 kvm->opts.target.uid = UINT_MAX;
1477
1478 symbol__init();
1479 disable_buildid_cache();
1480
1481 use_browser = 0;
1482 setup_browser(false);
1483
1484 if (argc) {
1485 argc = parse_options(argc, argv, live_options,
1486 live_usage, 0);
1487 if (argc)
1488 usage_with_options(live_usage, live_options);
1489 }
1490
1491 kvm->duration *= NSEC_PER_USEC;
1492
1493
1494
1495
1496 err = perf_target__validate(&kvm->opts.target);
1497 if (err) {
1498 perf_target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1499 ui__warning("%s", errbuf);
1500 }
1501
1502 if (perf_target__none(&kvm->opts.target))
1503 kvm->opts.target.system_wide = true;
1504
1505
1506
1507
1508
1509 kvm->evlist = kvm_live_event_list();
1510 if (kvm->evlist == NULL) {
1511 err = -1;
1512 goto out;
1513 }
1514
1515 symbol_conf.nr_events = kvm->evlist->nr_entries;
1516
1517 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1518 usage_with_options(live_usage, live_options);
1519
1520
1521
1522
1523 kvm->session = perf_session__new(NULL, O_WRONLY, false, false, &kvm->tool);
1524 if (kvm->session == NULL) {
1525 err = -ENOMEM;
1526 goto out;
1527 }
1528 kvm->session->evlist = kvm->evlist;
1529 perf_session__set_id_hdr_size(kvm->session);
1530
1531
1532 if (perf_target__has_task(&kvm->opts.target))
1533 perf_event__synthesize_thread_map(&kvm->tool,
1534 kvm->evlist->threads,
1535 perf_event__process,
1536 &kvm->session->machines.host);
1537 else
1538 perf_event__synthesize_threads(&kvm->tool, perf_event__process,
1539 &kvm->session->machines.host);
1540
1541
1542 err = kvm_live_open_events(kvm);
1543 if (err)
1544 goto out;
1545
1546 err = kvm_events_live_report(kvm);
1547
1548out:
1549 exit_browser(0);
1550
1551 if (kvm->session)
1552 perf_session__delete(kvm->session);
1553 kvm->session = NULL;
1554 if (kvm->evlist) {
1555 perf_evlist__delete_maps(kvm->evlist);
1556 perf_evlist__delete(kvm->evlist);
1557 }
1558
1559 return err;
1560}
1561
1562static void print_kvm_stat_usage(void)
1563{
1564 printf("Usage: perf kvm stat <command>\n\n");
1565
1566 printf("# Available commands:\n");
1567 printf("\trecord: record kvm events\n");
1568 printf("\treport: report statistical data of kvm events\n");
1569 printf("\tlive: live reporting of statistical data of kvm events\n");
1570
1571 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1572}
1573
1574static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1575{
1576 struct perf_kvm_stat kvm = {
1577 .file_name = file_name,
1578
1579 .trace_vcpu = -1,
1580 .report_event = "vmexit",
1581 .sort_key = "sample",
1582
1583 .exit_reasons = svm_exit_reasons,
1584 .exit_reasons_size = ARRAY_SIZE(svm_exit_reasons),
1585 .exit_reasons_isa = "SVM",
1586 };
1587
1588 if (argc == 1) {
1589 print_kvm_stat_usage();
1590 goto perf_stat;
1591 }
1592
1593 if (!strncmp(argv[1], "rec", 3))
1594 return kvm_events_record(&kvm, argc - 1, argv + 1);
1595
1596 if (!strncmp(argv[1], "rep", 3))
1597 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1598
1599 if (!strncmp(argv[1], "live", 4))
1600 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1601
1602perf_stat:
1603 return cmd_stat(argc, argv, NULL);
1604}
1605#endif
1606
1607static int __cmd_record(const char *file_name, int argc, const char **argv)
1608{
1609 int rec_argc, i = 0, j;
1610 const char **rec_argv;
1611
1612 rec_argc = argc + 2;
1613 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1614 rec_argv[i++] = strdup("record");
1615 rec_argv[i++] = strdup("-o");
1616 rec_argv[i++] = strdup(file_name);
1617 for (j = 1; j < argc; j++, i++)
1618 rec_argv[i] = argv[j];
1619
1620 BUG_ON(i != rec_argc);
1621
1622 return cmd_record(i, rec_argv, NULL);
1623}
1624
1625static int __cmd_report(const char *file_name, int argc, const char **argv)
1626{
1627 int rec_argc, i = 0, j;
1628 const char **rec_argv;
1629
1630 rec_argc = argc + 2;
1631 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1632 rec_argv[i++] = strdup("report");
1633 rec_argv[i++] = strdup("-i");
1634 rec_argv[i++] = strdup(file_name);
1635 for (j = 1; j < argc; j++, i++)
1636 rec_argv[i] = argv[j];
1637
1638 BUG_ON(i != rec_argc);
1639
1640 return cmd_report(i, rec_argv, NULL);
1641}
1642
1643static int
1644__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1645{
1646 int rec_argc, i = 0, j;
1647 const char **rec_argv;
1648
1649 rec_argc = argc + 2;
1650 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1651 rec_argv[i++] = strdup("buildid-list");
1652 rec_argv[i++] = strdup("-i");
1653 rec_argv[i++] = strdup(file_name);
1654 for (j = 1; j < argc; j++, i++)
1655 rec_argv[i] = argv[j];
1656
1657 BUG_ON(i != rec_argc);
1658
1659 return cmd_buildid_list(i, rec_argv, NULL);
1660}
1661
1662int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1663{
1664 const char *file_name = NULL;
1665 const struct option kvm_options[] = {
1666 OPT_STRING('i', "input", &file_name, "file",
1667 "Input file name"),
1668 OPT_STRING('o', "output", &file_name, "file",
1669 "Output file name"),
1670 OPT_BOOLEAN(0, "guest", &perf_guest,
1671 "Collect guest os data"),
1672 OPT_BOOLEAN(0, "host", &perf_host,
1673 "Collect host os data"),
1674 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1675 "guest mount directory under which every guest os"
1676 " instance has a subdir"),
1677 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1678 "file", "file saving guest os vmlinux"),
1679 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1680 "file", "file saving guest os /proc/kallsyms"),
1681 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1682 "file", "file saving guest os /proc/modules"),
1683 OPT_END()
1684 };
1685
1686
1687 const char * const kvm_usage[] = {
1688 "perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
1689 NULL
1690 };
1691
1692 perf_host = 0;
1693 perf_guest = 1;
1694
1695 argc = parse_options(argc, argv, kvm_options, kvm_usage,
1696 PARSE_OPT_STOP_AT_NON_OPTION);
1697 if (!argc)
1698 usage_with_options(kvm_usage, kvm_options);
1699
1700 if (!perf_host)
1701 perf_guest = 1;
1702
1703 if (!file_name) {
1704 if (perf_host && !perf_guest)
1705 file_name = strdup("perf.data.host");
1706 else if (!perf_host && perf_guest)
1707 file_name = strdup("perf.data.guest");
1708 else
1709 file_name = strdup("perf.data.kvm");
1710
1711 if (!file_name) {
1712 pr_err("Failed to allocate memory for filename\n");
1713 return -ENOMEM;
1714 }
1715 }
1716
1717 if (!strncmp(argv[0], "rec", 3))
1718 return __cmd_record(file_name, argc, argv);
1719 else if (!strncmp(argv[0], "rep", 3))
1720 return __cmd_report(file_name, argc, argv);
1721 else if (!strncmp(argv[0], "diff", 4))
1722 return cmd_diff(argc, argv, NULL);
1723 else if (!strncmp(argv[0], "top", 3))
1724 return cmd_top(argc, argv, NULL);
1725 else if (!strncmp(argv[0], "buildid-list", 12))
1726 return __cmd_buildid_list(file_name, argc, argv);
1727#if defined(__i386__) || defined(__x86_64__)
1728 else if (!strncmp(argv[0], "stat", 4))
1729 return kvm_cmd_stat(file_name, argc, argv);
1730#endif
1731 else
1732 usage_with_options(kvm_usage, kvm_options);
1733
1734 return 0;
1735}
1736