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1#include "builtin.h"
2#include "perf.h"
3
4#include "util/evsel.h"
5#include "util/evlist.h"
6#include "util/util.h"
7#include "util/cache.h"
8#include "util/symbol.h"
9#include "util/thread.h"
10#include "util/header.h"
11#include "util/session.h"
12#include "util/intlist.h"
13#include <subcmd/parse-options.h>
14#include "util/trace-event.h"
15#include "util/debug.h"
16#include "util/tool.h"
17#include "util/stat.h"
18#include "util/top.h"
19#include "util/data.h"
20#include "util/ordered-events.h"
21
22#include <sys/prctl.h>
23#ifdef HAVE_TIMERFD_SUPPORT
24#include <sys/timerfd.h>
25#endif
26
27#include <termios.h>
28#include <semaphore.h>
29#include <pthread.h>
30#include <math.h>
31
32#ifdef HAVE_KVM_STAT_SUPPORT
33#include "util/kvm-stat.h"
34
35void exit_event_get_key(struct perf_evsel *evsel,
36 struct perf_sample *sample,
37 struct event_key *key)
38{
39 key->info = 0;
40 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
41}
42
43bool kvm_exit_event(struct perf_evsel *evsel)
44{
45 return !strcmp(evsel->name, kvm_exit_trace);
46}
47
48bool exit_event_begin(struct perf_evsel *evsel,
49 struct perf_sample *sample, struct event_key *key)
50{
51 if (kvm_exit_event(evsel)) {
52 exit_event_get_key(evsel, sample, key);
53 return true;
54 }
55
56 return false;
57}
58
59bool kvm_entry_event(struct perf_evsel *evsel)
60{
61 return !strcmp(evsel->name, kvm_entry_trace);
62}
63
64bool exit_event_end(struct perf_evsel *evsel,
65 struct perf_sample *sample __maybe_unused,
66 struct event_key *key __maybe_unused)
67{
68 return kvm_entry_event(evsel);
69}
70
71static const char *get_exit_reason(struct perf_kvm_stat *kvm,
72 struct exit_reasons_table *tbl,
73 u64 exit_code)
74{
75 while (tbl->reason != NULL) {
76 if (tbl->exit_code == exit_code)
77 return tbl->reason;
78 tbl++;
79 }
80
81 pr_err("unknown kvm exit code:%lld on %s\n",
82 (unsigned long long)exit_code, kvm->exit_reasons_isa);
83 return "UNKNOWN";
84}
85
86void exit_event_decode_key(struct perf_kvm_stat *kvm,
87 struct event_key *key,
88 char *decode)
89{
90 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
91 key->key);
92
93 scnprintf(decode, decode_str_len, "%s", exit_reason);
94}
95
96static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
97{
98 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
99
100 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
101 if (!strcmp(events_ops->name, kvm->report_event)) {
102 kvm->events_ops = events_ops->ops;
103 return true;
104 }
105 }
106
107 return false;
108}
109
110struct vcpu_event_record {
111 int vcpu_id;
112 u64 start_time;
113 struct kvm_event *last_event;
114};
115
116
117static void init_kvm_event_record(struct perf_kvm_stat *kvm)
118{
119 unsigned int i;
120
121 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
122 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
123}
124
125#ifdef HAVE_TIMERFD_SUPPORT
126static void clear_events_cache_stats(struct list_head *kvm_events_cache)
127{
128 struct list_head *head;
129 struct kvm_event *event;
130 unsigned int i;
131 int j;
132
133 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
134 head = &kvm_events_cache[i];
135 list_for_each_entry(event, head, hash_entry) {
136 /* reset stats for event */
137 event->total.time = 0;
138 init_stats(&event->total.stats);
139
140 for (j = 0; j < event->max_vcpu; ++j) {
141 event->vcpu[j].time = 0;
142 init_stats(&event->vcpu[j].stats);
143 }
144 }
145 }
146}
147#endif
148
149static int kvm_events_hash_fn(u64 key)
150{
151 return key & (EVENTS_CACHE_SIZE - 1);
152}
153
154static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
155{
156 int old_max_vcpu = event->max_vcpu;
157 void *prev;
158
159 if (vcpu_id < event->max_vcpu)
160 return true;
161
162 while (event->max_vcpu <= vcpu_id)
163 event->max_vcpu += DEFAULT_VCPU_NUM;
164
165 prev = event->vcpu;
166 event->vcpu = realloc(event->vcpu,
167 event->max_vcpu * sizeof(*event->vcpu));
168 if (!event->vcpu) {
169 free(prev);
170 pr_err("Not enough memory\n");
171 return false;
172 }
173
174 memset(event->vcpu + old_max_vcpu, 0,
175 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
176 return true;
177}
178
179static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
180{
181 struct kvm_event *event;
182
183 event = zalloc(sizeof(*event));
184 if (!event) {
185 pr_err("Not enough memory\n");
186 return NULL;
187 }
188
189 event->key = *key;
190 init_stats(&event->total.stats);
191 return event;
192}
193
194static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
195 struct event_key *key)
196{
197 struct kvm_event *event;
198 struct list_head *head;
199
200 BUG_ON(key->key == INVALID_KEY);
201
202 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
203 list_for_each_entry(event, head, hash_entry) {
204 if (event->key.key == key->key && event->key.info == key->info)
205 return event;
206 }
207
208 event = kvm_alloc_init_event(key);
209 if (!event)
210 return NULL;
211
212 list_add(&event->hash_entry, head);
213 return event;
214}
215
216static bool handle_begin_event(struct perf_kvm_stat *kvm,
217 struct vcpu_event_record *vcpu_record,
218 struct event_key *key, u64 timestamp)
219{
220 struct kvm_event *event = NULL;
221
222 if (key->key != INVALID_KEY)
223 event = find_create_kvm_event(kvm, key);
224
225 vcpu_record->last_event = event;
226 vcpu_record->start_time = timestamp;
227 return true;
228}
229
230static void
231kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
232{
233 kvm_stats->time += time_diff;
234 update_stats(&kvm_stats->stats, time_diff);
235}
236
237static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
238{
239 struct kvm_event_stats *kvm_stats = &event->total;
240
241 if (vcpu_id != -1)
242 kvm_stats = &event->vcpu[vcpu_id];
243
244 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
245 avg_stats(&kvm_stats->stats));
246}
247
248static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
249 u64 time_diff)
250{
251 if (vcpu_id == -1) {
252 kvm_update_event_stats(&event->total, time_diff);
253 return true;
254 }
255
256 if (!kvm_event_expand(event, vcpu_id))
257 return false;
258
259 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
260 return true;
261}
262
263static bool is_child_event(struct perf_kvm_stat *kvm,
264 struct perf_evsel *evsel,
265 struct perf_sample *sample,
266 struct event_key *key)
267{
268 struct child_event_ops *child_ops;
269
270 child_ops = kvm->events_ops->child_ops;
271
272 if (!child_ops)
273 return false;
274
275 for (; child_ops->name; child_ops++) {
276 if (!strcmp(evsel->name, child_ops->name)) {
277 child_ops->get_key(evsel, sample, key);
278 return true;
279 }
280 }
281
282 return false;
283}
284
285static bool handle_child_event(struct perf_kvm_stat *kvm,
286 struct vcpu_event_record *vcpu_record,
287 struct event_key *key,
288 struct perf_sample *sample __maybe_unused)
289{
290 struct kvm_event *event = NULL;
291
292 if (key->key != INVALID_KEY)
293 event = find_create_kvm_event(kvm, key);
294
295 vcpu_record->last_event = event;
296
297 return true;
298}
299
300static bool skip_event(const char *event)
301{
302 const char * const *skip_events;
303
304 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
305 if (!strcmp(event, *skip_events))
306 return true;
307
308 return false;
309}
310
311static bool handle_end_event(struct perf_kvm_stat *kvm,
312 struct vcpu_event_record *vcpu_record,
313 struct event_key *key,
314 struct perf_sample *sample)
315{
316 struct kvm_event *event;
317 u64 time_begin, time_diff;
318 int vcpu;
319
320 if (kvm->trace_vcpu == -1)
321 vcpu = -1;
322 else
323 vcpu = vcpu_record->vcpu_id;
324
325 event = vcpu_record->last_event;
326 time_begin = vcpu_record->start_time;
327
328 /* The begin event is not caught. */
329 if (!time_begin)
330 return true;
331
332 /*
333 * In some case, the 'begin event' only records the start timestamp,
334 * the actual event is recognized in the 'end event' (e.g. mmio-event).
335 */
336
337 /* Both begin and end events did not get the key. */
338 if (!event && key->key == INVALID_KEY)
339 return true;
340
341 if (!event)
342 event = find_create_kvm_event(kvm, key);
343
344 if (!event)
345 return false;
346
347 vcpu_record->last_event = NULL;
348 vcpu_record->start_time = 0;
349
350 /* seems to happen once in a while during live mode */
351 if (sample->time < time_begin) {
352 pr_debug("End time before begin time; skipping event.\n");
353 return true;
354 }
355
356 time_diff = sample->time - time_begin;
357
358 if (kvm->duration && time_diff > kvm->duration) {
359 char decode[decode_str_len];
360
361 kvm->events_ops->decode_key(kvm, &event->key, decode);
362 if (!skip_event(decode)) {
363 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
364 sample->time, sample->pid, vcpu_record->vcpu_id,
365 decode, time_diff/1000);
366 }
367 }
368
369 return update_kvm_event(event, vcpu, time_diff);
370}
371
372static
373struct vcpu_event_record *per_vcpu_record(struct thread *thread,
374 struct perf_evsel *evsel,
375 struct perf_sample *sample)
376{
377 /* Only kvm_entry records vcpu id. */
378 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
379 struct vcpu_event_record *vcpu_record;
380
381 vcpu_record = zalloc(sizeof(*vcpu_record));
382 if (!vcpu_record) {
383 pr_err("%s: Not enough memory\n", __func__);
384 return NULL;
385 }
386
387 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
388 vcpu_id_str);
389 thread__set_priv(thread, vcpu_record);
390 }
391
392 return thread__priv(thread);
393}
394
395static bool handle_kvm_event(struct perf_kvm_stat *kvm,
396 struct thread *thread,
397 struct perf_evsel *evsel,
398 struct perf_sample *sample)
399{
400 struct vcpu_event_record *vcpu_record;
401 struct event_key key = { .key = INVALID_KEY,
402 .exit_reasons = kvm->exit_reasons };
403
404 vcpu_record = per_vcpu_record(thread, evsel, sample);
405 if (!vcpu_record)
406 return true;
407
408 /* only process events for vcpus user cares about */
409 if ((kvm->trace_vcpu != -1) &&
410 (kvm->trace_vcpu != vcpu_record->vcpu_id))
411 return true;
412
413 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
414 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
415
416 if (is_child_event(kvm, evsel, sample, &key))
417 return handle_child_event(kvm, vcpu_record, &key, sample);
418
419 if (kvm->events_ops->is_end_event(evsel, sample, &key))
420 return handle_end_event(kvm, vcpu_record, &key, sample);
421
422 return true;
423}
424
425#define GET_EVENT_KEY(func, field) \
426static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
427{ \
428 if (vcpu == -1) \
429 return event->total.field; \
430 \
431 if (vcpu >= event->max_vcpu) \
432 return 0; \
433 \
434 return event->vcpu[vcpu].field; \
435}
436
437#define COMPARE_EVENT_KEY(func, field) \
438GET_EVENT_KEY(func, field) \
439static int compare_kvm_event_ ## func(struct kvm_event *one, \
440 struct kvm_event *two, int vcpu)\
441{ \
442 return get_event_ ##func(one, vcpu) > \
443 get_event_ ##func(two, vcpu); \
444}
445
446GET_EVENT_KEY(time, time);
447COMPARE_EVENT_KEY(count, stats.n);
448COMPARE_EVENT_KEY(mean, stats.mean);
449GET_EVENT_KEY(max, stats.max);
450GET_EVENT_KEY(min, stats.min);
451
452#define DEF_SORT_NAME_KEY(name, compare_key) \
453 { #name, compare_kvm_event_ ## compare_key }
454
455static struct kvm_event_key keys[] = {
456 DEF_SORT_NAME_KEY(sample, count),
457 DEF_SORT_NAME_KEY(time, mean),
458 { NULL, NULL }
459};
460
461static bool select_key(struct perf_kvm_stat *kvm)
462{
463 int i;
464
465 for (i = 0; keys[i].name; i++) {
466 if (!strcmp(keys[i].name, kvm->sort_key)) {
467 kvm->compare = keys[i].key;
468 return true;
469 }
470 }
471
472 pr_err("Unknown compare key:%s\n", kvm->sort_key);
473 return false;
474}
475
476static void insert_to_result(struct rb_root *result, struct kvm_event *event,
477 key_cmp_fun bigger, int vcpu)
478{
479 struct rb_node **rb = &result->rb_node;
480 struct rb_node *parent = NULL;
481 struct kvm_event *p;
482
483 while (*rb) {
484 p = container_of(*rb, struct kvm_event, rb);
485 parent = *rb;
486
487 if (bigger(event, p, vcpu))
488 rb = &(*rb)->rb_left;
489 else
490 rb = &(*rb)->rb_right;
491 }
492
493 rb_link_node(&event->rb, parent, rb);
494 rb_insert_color(&event->rb, result);
495}
496
497static void
498update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
499{
500 int vcpu = kvm->trace_vcpu;
501
502 kvm->total_count += get_event_count(event, vcpu);
503 kvm->total_time += get_event_time(event, vcpu);
504}
505
506static bool event_is_valid(struct kvm_event *event, int vcpu)
507{
508 return !!get_event_count(event, vcpu);
509}
510
511static void sort_result(struct perf_kvm_stat *kvm)
512{
513 unsigned int i;
514 int vcpu = kvm->trace_vcpu;
515 struct kvm_event *event;
516
517 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
518 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
519 if (event_is_valid(event, vcpu)) {
520 update_total_count(kvm, event);
521 insert_to_result(&kvm->result, event,
522 kvm->compare, vcpu);
523 }
524 }
525 }
526}
527
528/* returns left most element of result, and erase it */
529static struct kvm_event *pop_from_result(struct rb_root *result)
530{
531 struct rb_node *node = rb_first(result);
532
533 if (!node)
534 return NULL;
535
536 rb_erase(node, result);
537 return container_of(node, struct kvm_event, rb);
538}
539
540static void print_vcpu_info(struct perf_kvm_stat *kvm)
541{
542 int vcpu = kvm->trace_vcpu;
543
544 pr_info("Analyze events for ");
545
546 if (kvm->opts.target.system_wide)
547 pr_info("all VMs, ");
548 else if (kvm->opts.target.pid)
549 pr_info("pid(s) %s, ", kvm->opts.target.pid);
550 else
551 pr_info("dazed and confused on what is monitored, ");
552
553 if (vcpu == -1)
554 pr_info("all VCPUs:\n\n");
555 else
556 pr_info("VCPU %d:\n\n", vcpu);
557}
558
559static void show_timeofday(void)
560{
561 char date[64];
562 struct timeval tv;
563 struct tm ltime;
564
565 gettimeofday(&tv, NULL);
566 if (localtime_r(&tv.tv_sec, <ime)) {
567 strftime(date, sizeof(date), "%H:%M:%S", <ime);
568 pr_info("%s.%06ld", date, tv.tv_usec);
569 } else
570 pr_info("00:00:00.000000");
571
572 return;
573}
574
575static void print_result(struct perf_kvm_stat *kvm)
576{
577 char decode[decode_str_len];
578 struct kvm_event *event;
579 int vcpu = kvm->trace_vcpu;
580
581 if (kvm->live) {
582 puts(CONSOLE_CLEAR);
583 show_timeofday();
584 }
585
586 pr_info("\n\n");
587 print_vcpu_info(kvm);
588 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
589 pr_info("%10s ", "Samples");
590 pr_info("%9s ", "Samples%");
591
592 pr_info("%9s ", "Time%");
593 pr_info("%11s ", "Min Time");
594 pr_info("%11s ", "Max Time");
595 pr_info("%16s ", "Avg time");
596 pr_info("\n\n");
597
598 while ((event = pop_from_result(&kvm->result))) {
599 u64 ecount, etime, max, min;
600
601 ecount = get_event_count(event, vcpu);
602 etime = get_event_time(event, vcpu);
603 max = get_event_max(event, vcpu);
604 min = get_event_min(event, vcpu);
605
606 kvm->events_ops->decode_key(kvm, &event->key, decode);
607 pr_info("%*s ", decode_str_len, decode);
608 pr_info("%10llu ", (unsigned long long)ecount);
609 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
610 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
611 pr_info("%9.2fus ", (double)min / 1e3);
612 pr_info("%9.2fus ", (double)max / 1e3);
613 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
614 kvm_event_rel_stddev(vcpu, event));
615 pr_info("\n");
616 }
617
618 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
619 kvm->total_count, kvm->total_time / 1e3);
620
621 if (kvm->lost_events)
622 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
623}
624
625#ifdef HAVE_TIMERFD_SUPPORT
626static int process_lost_event(struct perf_tool *tool,
627 union perf_event *event __maybe_unused,
628 struct perf_sample *sample __maybe_unused,
629 struct machine *machine __maybe_unused)
630{
631 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
632
633 kvm->lost_events++;
634 return 0;
635}
636#endif
637
638static bool skip_sample(struct perf_kvm_stat *kvm,
639 struct perf_sample *sample)
640{
641 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
642 return true;
643
644 return false;
645}
646
647static int process_sample_event(struct perf_tool *tool,
648 union perf_event *event,
649 struct perf_sample *sample,
650 struct perf_evsel *evsel,
651 struct machine *machine)
652{
653 int err = 0;
654 struct thread *thread;
655 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
656 tool);
657
658 if (skip_sample(kvm, sample))
659 return 0;
660
661 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
662 if (thread == NULL) {
663 pr_debug("problem processing %d event, skipping it.\n",
664 event->header.type);
665 return -1;
666 }
667
668 if (!handle_kvm_event(kvm, thread, evsel, sample))
669 err = -1;
670
671 thread__put(thread);
672 return err;
673}
674
675static int cpu_isa_config(struct perf_kvm_stat *kvm)
676{
677 char buf[64], *cpuid;
678 int err;
679
680 if (kvm->live) {
681 err = get_cpuid(buf, sizeof(buf));
682 if (err != 0) {
683 pr_err("Failed to look up CPU type\n");
684 return err;
685 }
686 cpuid = buf;
687 } else
688 cpuid = kvm->session->header.env.cpuid;
689
690 if (!cpuid) {
691 pr_err("Failed to look up CPU type\n");
692 return -EINVAL;
693 }
694
695 err = cpu_isa_init(kvm, cpuid);
696 if (err == -ENOTSUP)
697 pr_err("CPU %s is not supported.\n", cpuid);
698
699 return err;
700}
701
702static bool verify_vcpu(int vcpu)
703{
704 if (vcpu != -1 && vcpu < 0) {
705 pr_err("Invalid vcpu:%d.\n", vcpu);
706 return false;
707 }
708
709 return true;
710}
711
712#ifdef HAVE_TIMERFD_SUPPORT
713/* keeping the max events to a modest level to keep
714 * the processing of samples per mmap smooth.
715 */
716#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
717
718static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
719 u64 *mmap_time)
720{
721 union perf_event *event;
722 struct perf_sample sample;
723 s64 n = 0;
724 int err;
725
726 *mmap_time = ULLONG_MAX;
727 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
728 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
729 if (err) {
730 perf_evlist__mmap_consume(kvm->evlist, idx);
731 pr_err("Failed to parse sample\n");
732 return -1;
733 }
734
735 err = perf_session__queue_event(kvm->session, event, &sample, 0);
736 /*
737 * FIXME: Here we can't consume the event, as perf_session__queue_event will
738 * point to it, and it'll get possibly overwritten by the kernel.
739 */
740 perf_evlist__mmap_consume(kvm->evlist, idx);
741
742 if (err) {
743 pr_err("Failed to enqueue sample: %d\n", err);
744 return -1;
745 }
746
747 /* save time stamp of our first sample for this mmap */
748 if (n == 0)
749 *mmap_time = sample.time;
750
751 /* limit events per mmap handled all at once */
752 n++;
753 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
754 break;
755 }
756
757 return n;
758}
759
760static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
761{
762 int i, err, throttled = 0;
763 s64 n, ntotal = 0;
764 u64 flush_time = ULLONG_MAX, mmap_time;
765
766 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
767 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
768 if (n < 0)
769 return -1;
770
771 /* flush time is going to be the minimum of all the individual
772 * mmap times. Essentially, we flush all the samples queued up
773 * from the last pass under our minimal start time -- that leaves
774 * a very small race for samples to come in with a lower timestamp.
775 * The ioctl to return the perf_clock timestamp should close the
776 * race entirely.
777 */
778 if (mmap_time < flush_time)
779 flush_time = mmap_time;
780
781 ntotal += n;
782 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
783 throttled = 1;
784 }
785
786 /* flush queue after each round in which we processed events */
787 if (ntotal) {
788 struct ordered_events *oe = &kvm->session->ordered_events;
789
790 oe->next_flush = flush_time;
791 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
792 if (err) {
793 if (kvm->lost_events)
794 pr_info("\nLost events: %" PRIu64 "\n\n",
795 kvm->lost_events);
796 return err;
797 }
798 }
799
800 return throttled;
801}
802
803static volatile int done;
804
805static void sig_handler(int sig __maybe_unused)
806{
807 done = 1;
808}
809
810static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
811{
812 struct itimerspec new_value;
813 int rc = -1;
814
815 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
816 if (kvm->timerfd < 0) {
817 pr_err("timerfd_create failed\n");
818 goto out;
819 }
820
821 new_value.it_value.tv_sec = kvm->display_time;
822 new_value.it_value.tv_nsec = 0;
823 new_value.it_interval.tv_sec = kvm->display_time;
824 new_value.it_interval.tv_nsec = 0;
825
826 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
827 pr_err("timerfd_settime failed: %d\n", errno);
828 close(kvm->timerfd);
829 goto out;
830 }
831
832 rc = 0;
833out:
834 return rc;
835}
836
837static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
838{
839 uint64_t c;
840 int rc;
841
842 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
843 if (rc < 0) {
844 if (errno == EAGAIN)
845 return 0;
846
847 pr_err("Failed to read timer fd: %d\n", errno);
848 return -1;
849 }
850
851 if (rc != sizeof(uint64_t)) {
852 pr_err("Error reading timer fd - invalid size returned\n");
853 return -1;
854 }
855
856 if (c != 1)
857 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
858
859 /* update display */
860 sort_result(kvm);
861 print_result(kvm);
862
863 /* reset counts */
864 clear_events_cache_stats(kvm->kvm_events_cache);
865 kvm->total_count = 0;
866 kvm->total_time = 0;
867 kvm->lost_events = 0;
868
869 return 0;
870}
871
872static int fd_set_nonblock(int fd)
873{
874 long arg = 0;
875
876 arg = fcntl(fd, F_GETFL);
877 if (arg < 0) {
878 pr_err("Failed to get current flags for fd %d\n", fd);
879 return -1;
880 }
881
882 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
883 pr_err("Failed to set non-block option on fd %d\n", fd);
884 return -1;
885 }
886
887 return 0;
888}
889
890static int perf_kvm__handle_stdin(void)
891{
892 int c;
893
894 c = getc(stdin);
895 if (c == 'q')
896 return 1;
897
898 return 0;
899}
900
901static int kvm_events_live_report(struct perf_kvm_stat *kvm)
902{
903 int nr_stdin, ret, err = -EINVAL;
904 struct termios save;
905
906 /* live flag must be set first */
907 kvm->live = true;
908
909 ret = cpu_isa_config(kvm);
910 if (ret < 0)
911 return ret;
912
913 if (!verify_vcpu(kvm->trace_vcpu) ||
914 !select_key(kvm) ||
915 !register_kvm_events_ops(kvm)) {
916 goto out;
917 }
918
919 set_term_quiet_input(&save);
920 init_kvm_event_record(kvm);
921
922 signal(SIGINT, sig_handler);
923 signal(SIGTERM, sig_handler);
924
925 /* add timer fd */
926 if (perf_kvm__timerfd_create(kvm) < 0) {
927 err = -1;
928 goto out;
929 }
930
931 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
932 goto out;
933
934 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
935 if (nr_stdin < 0)
936 goto out;
937
938 if (fd_set_nonblock(fileno(stdin)) != 0)
939 goto out;
940
941 /* everything is good - enable the events and process */
942 perf_evlist__enable(kvm->evlist);
943
944 while (!done) {
945 struct fdarray *fda = &kvm->evlist->pollfd;
946 int rc;
947
948 rc = perf_kvm__mmap_read(kvm);
949 if (rc < 0)
950 break;
951
952 err = perf_kvm__handle_timerfd(kvm);
953 if (err)
954 goto out;
955
956 if (fda->entries[nr_stdin].revents & POLLIN)
957 done = perf_kvm__handle_stdin();
958
959 if (!rc && !done)
960 err = fdarray__poll(fda, 100);
961 }
962
963 perf_evlist__disable(kvm->evlist);
964
965 if (err == 0) {
966 sort_result(kvm);
967 print_result(kvm);
968 }
969
970out:
971 if (kvm->timerfd >= 0)
972 close(kvm->timerfd);
973
974 tcsetattr(0, TCSAFLUSH, &save);
975 return err;
976}
977
978static int kvm_live_open_events(struct perf_kvm_stat *kvm)
979{
980 int err, rc = -1;
981 struct perf_evsel *pos;
982 struct perf_evlist *evlist = kvm->evlist;
983 char sbuf[STRERR_BUFSIZE];
984
985 perf_evlist__config(evlist, &kvm->opts);
986
987 /*
988 * Note: exclude_{guest,host} do not apply here.
989 * This command processes KVM tracepoints from host only
990 */
991 evlist__for_each(evlist, pos) {
992 struct perf_event_attr *attr = &pos->attr;
993
994 /* make sure these *are* set */
995 perf_evsel__set_sample_bit(pos, TID);
996 perf_evsel__set_sample_bit(pos, TIME);
997 perf_evsel__set_sample_bit(pos, CPU);
998 perf_evsel__set_sample_bit(pos, RAW);
999 /* make sure these are *not*; want as small a sample as possible */
1000 perf_evsel__reset_sample_bit(pos, PERIOD);
1001 perf_evsel__reset_sample_bit(pos, IP);
1002 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1003 perf_evsel__reset_sample_bit(pos, ADDR);
1004 perf_evsel__reset_sample_bit(pos, READ);
1005 attr->mmap = 0;
1006 attr->comm = 0;
1007 attr->task = 0;
1008
1009 attr->sample_period = 1;
1010
1011 attr->watermark = 0;
1012 attr->wakeup_events = 1000;
1013
1014 /* will enable all once we are ready */
1015 attr->disabled = 1;
1016 }
1017
1018 err = perf_evlist__open(evlist);
1019 if (err < 0) {
1020 printf("Couldn't create the events: %s\n",
1021 strerror_r(errno, sbuf, sizeof(sbuf)));
1022 goto out;
1023 }
1024
1025 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1026 ui__error("Failed to mmap the events: %s\n",
1027 strerror_r(errno, sbuf, sizeof(sbuf)));
1028 perf_evlist__close(evlist);
1029 goto out;
1030 }
1031
1032 rc = 0;
1033
1034out:
1035 return rc;
1036}
1037#endif
1038
1039static int read_events(struct perf_kvm_stat *kvm)
1040{
1041 int ret;
1042
1043 struct perf_tool eops = {
1044 .sample = process_sample_event,
1045 .comm = perf_event__process_comm,
1046 .ordered_events = true,
1047 };
1048 struct perf_data_file file = {
1049 .path = kvm->file_name,
1050 .mode = PERF_DATA_MODE_READ,
1051 .force = kvm->force,
1052 };
1053
1054 kvm->tool = eops;
1055 kvm->session = perf_session__new(&file, false, &kvm->tool);
1056 if (!kvm->session) {
1057 pr_err("Initializing perf session failed\n");
1058 return -1;
1059 }
1060
1061 symbol__init(&kvm->session->header.env);
1062
1063 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1064 ret = -EINVAL;
1065 goto out_delete;
1066 }
1067
1068 /*
1069 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1070 * traced in the old kernel.
1071 */
1072 ret = cpu_isa_config(kvm);
1073 if (ret < 0)
1074 goto out_delete;
1075
1076 ret = perf_session__process_events(kvm->session);
1077
1078out_delete:
1079 perf_session__delete(kvm->session);
1080 return ret;
1081}
1082
1083static int parse_target_str(struct perf_kvm_stat *kvm)
1084{
1085 if (kvm->opts.target.pid) {
1086 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1087 if (kvm->pid_list == NULL) {
1088 pr_err("Error parsing process id string\n");
1089 return -EINVAL;
1090 }
1091 }
1092
1093 return 0;
1094}
1095
1096static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1097{
1098 int ret = -EINVAL;
1099 int vcpu = kvm->trace_vcpu;
1100
1101 if (parse_target_str(kvm) != 0)
1102 goto exit;
1103
1104 if (!verify_vcpu(vcpu))
1105 goto exit;
1106
1107 if (!select_key(kvm))
1108 goto exit;
1109
1110 if (!register_kvm_events_ops(kvm))
1111 goto exit;
1112
1113 init_kvm_event_record(kvm);
1114 setup_pager();
1115
1116 ret = read_events(kvm);
1117 if (ret)
1118 goto exit;
1119
1120 sort_result(kvm);
1121 print_result(kvm);
1122
1123exit:
1124 return ret;
1125}
1126
1127#define STRDUP_FAIL_EXIT(s) \
1128 ({ char *_p; \
1129 _p = strdup(s); \
1130 if (!_p) \
1131 return -ENOMEM; \
1132 _p; \
1133 })
1134
1135int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1136{
1137 return 0;
1138}
1139
1140static int
1141kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1142{
1143 unsigned int rec_argc, i, j, events_tp_size;
1144 const char **rec_argv;
1145 const char * const record_args[] = {
1146 "record",
1147 "-R",
1148 "-m", "1024",
1149 "-c", "1",
1150 };
1151 const char * const kvm_stat_record_usage[] = {
1152 "perf kvm stat record [<options>]",
1153 NULL
1154 };
1155 const char * const *events_tp;
1156 int ret;
1157
1158 events_tp_size = 0;
1159 ret = setup_kvm_events_tp(kvm);
1160 if (ret < 0) {
1161 pr_err("Unable to setup the kvm tracepoints\n");
1162 return ret;
1163 }
1164
1165 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1166 events_tp_size++;
1167
1168 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1169 2 * events_tp_size;
1170 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1171
1172 if (rec_argv == NULL)
1173 return -ENOMEM;
1174
1175 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1176 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1177
1178 for (j = 0; j < events_tp_size; j++) {
1179 rec_argv[i++] = "-e";
1180 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1181 }
1182
1183 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1184 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1185
1186 for (j = 1; j < (unsigned int)argc; j++, i++)
1187 rec_argv[i] = argv[j];
1188
1189 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1190 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1191 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1192
1193 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1194 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1195 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1196 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1197 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1198 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1199 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1200 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1201 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1202 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1203 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1204 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1205 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1206 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1207 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1208
1209 record_usage = kvm_stat_record_usage;
1210 return cmd_record(i, rec_argv, NULL);
1211}
1212
1213static int
1214kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1215{
1216 const struct option kvm_events_report_options[] = {
1217 OPT_STRING(0, "event", &kvm->report_event, "report event",
1218 "event for reporting: vmexit, "
1219 "mmio (x86 only), ioport (x86 only)"),
1220 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1221 "vcpu id to report"),
1222 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1223 "key for sorting: sample(sort by samples number)"
1224 " time (sort by avg time)"),
1225 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1226 "analyze events only for given process id(s)"),
1227 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1228 OPT_END()
1229 };
1230
1231 const char * const kvm_events_report_usage[] = {
1232 "perf kvm stat report [<options>]",
1233 NULL
1234 };
1235
1236 if (argc) {
1237 argc = parse_options(argc, argv,
1238 kvm_events_report_options,
1239 kvm_events_report_usage, 0);
1240 if (argc)
1241 usage_with_options(kvm_events_report_usage,
1242 kvm_events_report_options);
1243 }
1244
1245 if (!kvm->opts.target.pid)
1246 kvm->opts.target.system_wide = true;
1247
1248 return kvm_events_report_vcpu(kvm);
1249}
1250
1251#ifdef HAVE_TIMERFD_SUPPORT
1252static struct perf_evlist *kvm_live_event_list(void)
1253{
1254 struct perf_evlist *evlist;
1255 char *tp, *name, *sys;
1256 int err = -1;
1257 const char * const *events_tp;
1258
1259 evlist = perf_evlist__new();
1260 if (evlist == NULL)
1261 return NULL;
1262
1263 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1264
1265 tp = strdup(*events_tp);
1266 if (tp == NULL)
1267 goto out;
1268
1269 /* split tracepoint into subsystem and name */
1270 sys = tp;
1271 name = strchr(tp, ':');
1272 if (name == NULL) {
1273 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1274 *events_tp);
1275 free(tp);
1276 goto out;
1277 }
1278 *name = '\0';
1279 name++;
1280
1281 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1282 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1283 free(tp);
1284 goto out;
1285 }
1286
1287 free(tp);
1288 }
1289
1290 err = 0;
1291
1292out:
1293 if (err) {
1294 perf_evlist__delete(evlist);
1295 evlist = NULL;
1296 }
1297
1298 return evlist;
1299}
1300
1301static int kvm_events_live(struct perf_kvm_stat *kvm,
1302 int argc, const char **argv)
1303{
1304 char errbuf[BUFSIZ];
1305 int err;
1306
1307 const struct option live_options[] = {
1308 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1309 "record events on existing process id"),
1310 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1311 "number of mmap data pages",
1312 perf_evlist__parse_mmap_pages),
1313 OPT_INCR('v', "verbose", &verbose,
1314 "be more verbose (show counter open errors, etc)"),
1315 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1316 "system-wide collection from all CPUs"),
1317 OPT_UINTEGER('d', "display", &kvm->display_time,
1318 "time in seconds between display updates"),
1319 OPT_STRING(0, "event", &kvm->report_event, "report event",
1320 "event for reporting: "
1321 "vmexit, mmio (x86 only), ioport (x86 only)"),
1322 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1323 "vcpu id to report"),
1324 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1325 "key for sorting: sample(sort by samples number)"
1326 " time (sort by avg time)"),
1327 OPT_U64(0, "duration", &kvm->duration,
1328 "show events other than"
1329 " HLT (x86 only) or Wait state (s390 only)"
1330 " that take longer than duration usecs"),
1331 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1332 "per thread proc mmap processing timeout in ms"),
1333 OPT_END()
1334 };
1335 const char * const live_usage[] = {
1336 "perf kvm stat live [<options>]",
1337 NULL
1338 };
1339 struct perf_data_file file = {
1340 .mode = PERF_DATA_MODE_WRITE,
1341 };
1342
1343
1344 /* event handling */
1345 kvm->tool.sample = process_sample_event;
1346 kvm->tool.comm = perf_event__process_comm;
1347 kvm->tool.exit = perf_event__process_exit;
1348 kvm->tool.fork = perf_event__process_fork;
1349 kvm->tool.lost = process_lost_event;
1350 kvm->tool.ordered_events = true;
1351 perf_tool__fill_defaults(&kvm->tool);
1352
1353 /* set defaults */
1354 kvm->display_time = 1;
1355 kvm->opts.user_interval = 1;
1356 kvm->opts.mmap_pages = 512;
1357 kvm->opts.target.uses_mmap = false;
1358 kvm->opts.target.uid_str = NULL;
1359 kvm->opts.target.uid = UINT_MAX;
1360 kvm->opts.proc_map_timeout = 500;
1361
1362 symbol__init(NULL);
1363 disable_buildid_cache();
1364
1365 use_browser = 0;
1366
1367 if (argc) {
1368 argc = parse_options(argc, argv, live_options,
1369 live_usage, 0);
1370 if (argc)
1371 usage_with_options(live_usage, live_options);
1372 }
1373
1374 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1375
1376 /*
1377 * target related setups
1378 */
1379 err = target__validate(&kvm->opts.target);
1380 if (err) {
1381 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1382 ui__warning("%s", errbuf);
1383 }
1384
1385 if (target__none(&kvm->opts.target))
1386 kvm->opts.target.system_wide = true;
1387
1388
1389 /*
1390 * generate the event list
1391 */
1392 err = setup_kvm_events_tp(kvm);
1393 if (err < 0) {
1394 pr_err("Unable to setup the kvm tracepoints\n");
1395 return err;
1396 }
1397
1398 kvm->evlist = kvm_live_event_list();
1399 if (kvm->evlist == NULL) {
1400 err = -1;
1401 goto out;
1402 }
1403
1404 symbol_conf.nr_events = kvm->evlist->nr_entries;
1405
1406 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1407 usage_with_options(live_usage, live_options);
1408
1409 /*
1410 * perf session
1411 */
1412 kvm->session = perf_session__new(&file, false, &kvm->tool);
1413 if (kvm->session == NULL) {
1414 err = -1;
1415 goto out;
1416 }
1417 kvm->session->evlist = kvm->evlist;
1418 perf_session__set_id_hdr_size(kvm->session);
1419 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1420 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1421 kvm->evlist->threads, false, kvm->opts.proc_map_timeout);
1422 err = kvm_live_open_events(kvm);
1423 if (err)
1424 goto out;
1425
1426 err = kvm_events_live_report(kvm);
1427
1428out:
1429 if (kvm->session)
1430 perf_session__delete(kvm->session);
1431 kvm->session = NULL;
1432 if (kvm->evlist)
1433 perf_evlist__delete(kvm->evlist);
1434
1435 return err;
1436}
1437#endif
1438
1439static void print_kvm_stat_usage(void)
1440{
1441 printf("Usage: perf kvm stat <command>\n\n");
1442
1443 printf("# Available commands:\n");
1444 printf("\trecord: record kvm events\n");
1445 printf("\treport: report statistical data of kvm events\n");
1446 printf("\tlive: live reporting of statistical data of kvm events\n");
1447
1448 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1449}
1450
1451static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1452{
1453 struct perf_kvm_stat kvm = {
1454 .file_name = file_name,
1455
1456 .trace_vcpu = -1,
1457 .report_event = "vmexit",
1458 .sort_key = "sample",
1459
1460 };
1461
1462 if (argc == 1) {
1463 print_kvm_stat_usage();
1464 goto perf_stat;
1465 }
1466
1467 if (!strncmp(argv[1], "rec", 3))
1468 return kvm_events_record(&kvm, argc - 1, argv + 1);
1469
1470 if (!strncmp(argv[1], "rep", 3))
1471 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1472
1473#ifdef HAVE_TIMERFD_SUPPORT
1474 if (!strncmp(argv[1], "live", 4))
1475 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1476#endif
1477
1478perf_stat:
1479 return cmd_stat(argc, argv, NULL);
1480}
1481#endif /* HAVE_KVM_STAT_SUPPORT */
1482
1483static int __cmd_record(const char *file_name, int argc, const char **argv)
1484{
1485 int rec_argc, i = 0, j;
1486 const char **rec_argv;
1487
1488 rec_argc = argc + 2;
1489 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1490 rec_argv[i++] = strdup("record");
1491 rec_argv[i++] = strdup("-o");
1492 rec_argv[i++] = strdup(file_name);
1493 for (j = 1; j < argc; j++, i++)
1494 rec_argv[i] = argv[j];
1495
1496 BUG_ON(i != rec_argc);
1497
1498 return cmd_record(i, rec_argv, NULL);
1499}
1500
1501static int __cmd_report(const char *file_name, int argc, const char **argv)
1502{
1503 int rec_argc, i = 0, j;
1504 const char **rec_argv;
1505
1506 rec_argc = argc + 2;
1507 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1508 rec_argv[i++] = strdup("report");
1509 rec_argv[i++] = strdup("-i");
1510 rec_argv[i++] = strdup(file_name);
1511 for (j = 1; j < argc; j++, i++)
1512 rec_argv[i] = argv[j];
1513
1514 BUG_ON(i != rec_argc);
1515
1516 return cmd_report(i, rec_argv, NULL);
1517}
1518
1519static int
1520__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1521{
1522 int rec_argc, i = 0, j;
1523 const char **rec_argv;
1524
1525 rec_argc = argc + 2;
1526 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1527 rec_argv[i++] = strdup("buildid-list");
1528 rec_argv[i++] = strdup("-i");
1529 rec_argv[i++] = strdup(file_name);
1530 for (j = 1; j < argc; j++, i++)
1531 rec_argv[i] = argv[j];
1532
1533 BUG_ON(i != rec_argc);
1534
1535 return cmd_buildid_list(i, rec_argv, NULL);
1536}
1537
1538int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1539{
1540 const char *file_name = NULL;
1541 const struct option kvm_options[] = {
1542 OPT_STRING('i', "input", &file_name, "file",
1543 "Input file name"),
1544 OPT_STRING('o', "output", &file_name, "file",
1545 "Output file name"),
1546 OPT_BOOLEAN(0, "guest", &perf_guest,
1547 "Collect guest os data"),
1548 OPT_BOOLEAN(0, "host", &perf_host,
1549 "Collect host os data"),
1550 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1551 "guest mount directory under which every guest os"
1552 " instance has a subdir"),
1553 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1554 "file", "file saving guest os vmlinux"),
1555 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1556 "file", "file saving guest os /proc/kallsyms"),
1557 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1558 "file", "file saving guest os /proc/modules"),
1559 OPT_INCR('v', "verbose", &verbose,
1560 "be more verbose (show counter open errors, etc)"),
1561 OPT_END()
1562 };
1563
1564 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1565 "buildid-list", "stat", NULL };
1566 const char *kvm_usage[] = { NULL, NULL };
1567
1568 perf_host = 0;
1569 perf_guest = 1;
1570
1571 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1572 PARSE_OPT_STOP_AT_NON_OPTION);
1573 if (!argc)
1574 usage_with_options(kvm_usage, kvm_options);
1575
1576 if (!perf_host)
1577 perf_guest = 1;
1578
1579 if (!file_name) {
1580 file_name = get_filename_for_perf_kvm();
1581
1582 if (!file_name) {
1583 pr_err("Failed to allocate memory for filename\n");
1584 return -ENOMEM;
1585 }
1586 }
1587
1588 if (!strncmp(argv[0], "rec", 3))
1589 return __cmd_record(file_name, argc, argv);
1590 else if (!strncmp(argv[0], "rep", 3))
1591 return __cmd_report(file_name, argc, argv);
1592 else if (!strncmp(argv[0], "diff", 4))
1593 return cmd_diff(argc, argv, NULL);
1594 else if (!strncmp(argv[0], "top", 3))
1595 return cmd_top(argc, argv, NULL);
1596 else if (!strncmp(argv[0], "buildid-list", 12))
1597 return __cmd_buildid_list(file_name, argc, argv);
1598#ifdef HAVE_KVM_STAT_SUPPORT
1599 else if (!strncmp(argv[0], "stat", 4))
1600 return kvm_cmd_stat(file_name, argc, argv);
1601#endif
1602 else
1603 usage_with_options(kvm_usage, kvm_options);
1604
1605 return 0;
1606}
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 "util/util.h"
27#include "ui/browsers/hists.h"
28#include "ui/progress.h"
29#include "ui/ui.h"
30#include "util/string2.h"
31
32#include <sys/prctl.h>
33#ifdef HAVE_TIMERFD_SUPPORT
34#include <sys/timerfd.h>
35#endif
36#include <sys/time.h>
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <fcntl.h>
40
41#include <linux/err.h>
42#include <linux/kernel.h>
43#include <linux/string.h>
44#include <linux/time64.h>
45#include <linux/zalloc.h>
46#include <errno.h>
47#include <inttypes.h>
48#include <poll.h>
49#include <termios.h>
50#include <semaphore.h>
51#include <signal.h>
52#include <math.h>
53#include <perf/mmap.h>
54
55#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
56#define GET_EVENT_KEY(func, field) \
57static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
58{ \
59 if (vcpu == -1) \
60 return event->total.field; \
61 \
62 if (vcpu >= event->max_vcpu) \
63 return 0; \
64 \
65 return event->vcpu[vcpu].field; \
66}
67
68#define COMPARE_EVENT_KEY(func, field) \
69GET_EVENT_KEY(func, field) \
70static int64_t cmp_event_ ## func(struct kvm_event *one, \
71 struct kvm_event *two, int vcpu) \
72{ \
73 return get_event_ ##func(one, vcpu) - \
74 get_event_ ##func(two, vcpu); \
75}
76
77COMPARE_EVENT_KEY(time, time);
78COMPARE_EVENT_KEY(max, stats.max);
79COMPARE_EVENT_KEY(min, stats.min);
80COMPARE_EVENT_KEY(count, stats.n);
81COMPARE_EVENT_KEY(mean, stats.mean);
82
83struct kvm_hists {
84 struct hists hists;
85 struct perf_hpp_list list;
86};
87
88struct kvm_dimension {
89 const char *name;
90 const char *header;
91 int width;
92 int64_t (*cmp)(struct perf_hpp_fmt *fmt, struct hist_entry *left,
93 struct hist_entry *right);
94 int (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
95 struct hist_entry *he);
96};
97
98struct kvm_fmt {
99 struct perf_hpp_fmt fmt;
100 struct kvm_dimension *dim;
101};
102
103static struct kvm_hists kvm_hists;
104
105static int64_t ev_name_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
106 struct hist_entry *left,
107 struct hist_entry *right)
108{
109 /* Return opposite number for sorting in alphabetical order */
110 return -strcmp(left->kvm_info->name, right->kvm_info->name);
111}
112
113static int fmt_width(struct perf_hpp_fmt *fmt,
114 struct perf_hpp *hpp __maybe_unused,
115 struct hists *hists __maybe_unused);
116
117static int ev_name_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
118 struct hist_entry *he)
119{
120 int width = fmt_width(fmt, hpp, he->hists);
121
122 return scnprintf(hpp->buf, hpp->size, "%*s", width, he->kvm_info->name);
123}
124
125static struct kvm_dimension dim_event = {
126 .header = "Event name",
127 .name = "ev_name",
128 .cmp = ev_name_cmp,
129 .entry = ev_name_entry,
130 .width = 40,
131};
132
133#define EV_METRIC_CMP(metric) \
134static int64_t ev_cmp_##metric(struct perf_hpp_fmt *fmt __maybe_unused, \
135 struct hist_entry *left, \
136 struct hist_entry *right) \
137{ \
138 struct kvm_event *event_left; \
139 struct kvm_event *event_right; \
140 struct perf_kvm_stat *perf_kvm; \
141 \
142 event_left = container_of(left, struct kvm_event, he); \
143 event_right = container_of(right, struct kvm_event, he); \
144 \
145 perf_kvm = event_left->perf_kvm; \
146 return cmp_event_##metric(event_left, event_right, \
147 perf_kvm->trace_vcpu); \
148}
149
150EV_METRIC_CMP(time)
151EV_METRIC_CMP(count)
152EV_METRIC_CMP(max)
153EV_METRIC_CMP(min)
154EV_METRIC_CMP(mean)
155
156#define EV_METRIC_ENTRY(metric) \
157static int ev_entry_##metric(struct perf_hpp_fmt *fmt, \
158 struct perf_hpp *hpp, \
159 struct hist_entry *he) \
160{ \
161 struct kvm_event *event; \
162 int width = fmt_width(fmt, hpp, he->hists); \
163 struct perf_kvm_stat *perf_kvm; \
164 \
165 event = container_of(he, struct kvm_event, he); \
166 perf_kvm = event->perf_kvm; \
167 return scnprintf(hpp->buf, hpp->size, "%*lu", width, \
168 get_event_##metric(event, perf_kvm->trace_vcpu)); \
169}
170
171EV_METRIC_ENTRY(time)
172EV_METRIC_ENTRY(count)
173EV_METRIC_ENTRY(max)
174EV_METRIC_ENTRY(min)
175
176static struct kvm_dimension dim_time = {
177 .header = "Time (ns)",
178 .name = "time",
179 .cmp = ev_cmp_time,
180 .entry = ev_entry_time,
181 .width = 12,
182};
183
184static struct kvm_dimension dim_count = {
185 .header = "Samples",
186 .name = "sample",
187 .cmp = ev_cmp_count,
188 .entry = ev_entry_count,
189 .width = 12,
190};
191
192static struct kvm_dimension dim_max_time = {
193 .header = "Max Time (ns)",
194 .name = "max_t",
195 .cmp = ev_cmp_max,
196 .entry = ev_entry_max,
197 .width = 14,
198};
199
200static struct kvm_dimension dim_min_time = {
201 .header = "Min Time (ns)",
202 .name = "min_t",
203 .cmp = ev_cmp_min,
204 .entry = ev_entry_min,
205 .width = 14,
206};
207
208static int ev_entry_mean(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
209 struct hist_entry *he)
210{
211 struct kvm_event *event;
212 int width = fmt_width(fmt, hpp, he->hists);
213 struct perf_kvm_stat *perf_kvm;
214
215 event = container_of(he, struct kvm_event, he);
216 perf_kvm = event->perf_kvm;
217 return scnprintf(hpp->buf, hpp->size, "%*lu", width,
218 get_event_mean(event, perf_kvm->trace_vcpu));
219}
220
221static struct kvm_dimension dim_mean_time = {
222 .header = "Mean Time (ns)",
223 .name = "mean_t",
224 .cmp = ev_cmp_mean,
225 .entry = ev_entry_mean,
226 .width = 14,
227};
228
229#define PERC_STR(__s, __v) \
230({ \
231 scnprintf(__s, sizeof(__s), "%.2F%%", __v); \
232 __s; \
233})
234
235static double percent(u64 st, u64 tot)
236{
237 return tot ? 100. * (double) st / (double) tot : 0;
238}
239
240#define EV_METRIC_PERCENT(metric) \
241static int ev_percent_##metric(struct hist_entry *he) \
242{ \
243 struct kvm_event *event; \
244 struct perf_kvm_stat *perf_kvm; \
245 \
246 event = container_of(he, struct kvm_event, he); \
247 perf_kvm = event->perf_kvm; \
248 \
249 return percent(get_event_##metric(event, perf_kvm->trace_vcpu), \
250 perf_kvm->total_##metric); \
251}
252
253EV_METRIC_PERCENT(time)
254EV_METRIC_PERCENT(count)
255
256static int ev_entry_time_precent(struct perf_hpp_fmt *fmt,
257 struct perf_hpp *hpp,
258 struct hist_entry *he)
259{
260 int width = fmt_width(fmt, hpp, he->hists);
261 double per;
262 char buf[10];
263
264 per = ev_percent_time(he);
265 return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
266}
267
268static int64_t
269ev_cmp_time_precent(struct perf_hpp_fmt *fmt __maybe_unused,
270 struct hist_entry *left, struct hist_entry *right)
271{
272 double per_left;
273 double per_right;
274
275 per_left = ev_percent_time(left);
276 per_right = ev_percent_time(right);
277
278 return per_left - per_right;
279}
280
281static struct kvm_dimension dim_time_percent = {
282 .header = "Time%",
283 .name = "percent_time",
284 .cmp = ev_cmp_time_precent,
285 .entry = ev_entry_time_precent,
286 .width = 12,
287};
288
289static int ev_entry_count_precent(struct perf_hpp_fmt *fmt,
290 struct perf_hpp *hpp,
291 struct hist_entry *he)
292{
293 int width = fmt_width(fmt, hpp, he->hists);
294 double per;
295 char buf[10];
296
297 per = ev_percent_count(he);
298 return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
299}
300
301static int64_t
302ev_cmp_count_precent(struct perf_hpp_fmt *fmt __maybe_unused,
303 struct hist_entry *left, struct hist_entry *right)
304{
305 double per_left;
306 double per_right;
307
308 per_left = ev_percent_count(left);
309 per_right = ev_percent_count(right);
310
311 return per_left - per_right;
312}
313
314static struct kvm_dimension dim_count_percent = {
315 .header = "Sample%",
316 .name = "percent_sample",
317 .cmp = ev_cmp_count_precent,
318 .entry = ev_entry_count_precent,
319 .width = 12,
320};
321
322static struct kvm_dimension *dimensions[] = {
323 &dim_event,
324 &dim_time,
325 &dim_time_percent,
326 &dim_count,
327 &dim_count_percent,
328 &dim_max_time,
329 &dim_min_time,
330 &dim_mean_time,
331 NULL,
332};
333
334static int fmt_width(struct perf_hpp_fmt *fmt,
335 struct perf_hpp *hpp __maybe_unused,
336 struct hists *hists __maybe_unused)
337{
338 struct kvm_fmt *kvm_fmt;
339
340 kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
341 return kvm_fmt->dim->width;
342}
343
344static int fmt_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
345 struct hists *hists, int line __maybe_unused,
346 int *span __maybe_unused)
347{
348 struct kvm_fmt *kvm_fmt;
349 struct kvm_dimension *dim;
350 int width = fmt_width(fmt, hpp, hists);
351
352 kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
353 dim = kvm_fmt->dim;
354
355 return scnprintf(hpp->buf, hpp->size, "%*s", width, dim->header);
356}
357
358static bool fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
359{
360 struct kvm_fmt *kvm_fmt_a = container_of(a, struct kvm_fmt, fmt);
361 struct kvm_fmt *kvm_fmt_b = container_of(b, struct kvm_fmt, fmt);
362
363 return kvm_fmt_a->dim == kvm_fmt_b->dim;
364}
365
366static void fmt_free(struct perf_hpp_fmt *fmt)
367{
368 struct kvm_fmt *kvm_fmt;
369
370 kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
371 free(kvm_fmt);
372}
373
374static struct kvm_dimension *get_dimension(const char *name)
375{
376 unsigned int i;
377
378 for (i = 0; dimensions[i] != NULL; i++) {
379 if (!strcmp(dimensions[i]->name, name))
380 return dimensions[i];
381 }
382
383 return NULL;
384}
385
386static struct kvm_fmt *get_format(const char *name)
387{
388 struct kvm_dimension *dim = get_dimension(name);
389 struct kvm_fmt *kvm_fmt;
390 struct perf_hpp_fmt *fmt;
391
392 if (!dim)
393 return NULL;
394
395 kvm_fmt = zalloc(sizeof(*kvm_fmt));
396 if (!kvm_fmt)
397 return NULL;
398
399 kvm_fmt->dim = dim;
400
401 fmt = &kvm_fmt->fmt;
402 INIT_LIST_HEAD(&fmt->list);
403 INIT_LIST_HEAD(&fmt->sort_list);
404 fmt->cmp = dim->cmp;
405 fmt->sort = dim->cmp;
406 fmt->color = NULL;
407 fmt->entry = dim->entry;
408 fmt->header = fmt_header;
409 fmt->width = fmt_width;
410 fmt->collapse = dim->cmp;
411 fmt->equal = fmt_equal;
412 fmt->free = fmt_free;
413
414 return kvm_fmt;
415}
416
417static int kvm_hists__init_output(struct perf_hpp_list *hpp_list, char *name)
418{
419 struct kvm_fmt *kvm_fmt = get_format(name);
420
421 if (!kvm_fmt) {
422 pr_warning("Fail to find format for output field %s.\n", name);
423 return -EINVAL;
424 }
425
426 perf_hpp_list__column_register(hpp_list, &kvm_fmt->fmt);
427 return 0;
428}
429
430static int kvm_hists__init_sort(struct perf_hpp_list *hpp_list, char *name)
431{
432 struct kvm_fmt *kvm_fmt = get_format(name);
433
434 if (!kvm_fmt) {
435 pr_warning("Fail to find format for sorting %s.\n", name);
436 return -EINVAL;
437 }
438
439 perf_hpp_list__register_sort_field(hpp_list, &kvm_fmt->fmt);
440 return 0;
441}
442
443static int kvm_hpp_list__init(char *list,
444 struct perf_hpp_list *hpp_list,
445 int (*fn)(struct perf_hpp_list *hpp_list,
446 char *name))
447{
448 char *tmp, *tok;
449 int ret;
450
451 if (!list || !fn)
452 return 0;
453
454 for (tok = strtok_r(list, ", ", &tmp); tok;
455 tok = strtok_r(NULL, ", ", &tmp)) {
456 ret = fn(hpp_list, tok);
457 if (!ret)
458 continue;
459
460 /* Handle errors */
461 if (ret == -EINVAL)
462 pr_err("Invalid field key: '%s'", tok);
463 else if (ret == -ESRCH)
464 pr_err("Unknown field key: '%s'", tok);
465 else
466 pr_err("Fail to initialize for field key: '%s'", tok);
467
468 break;
469 }
470
471 return ret;
472}
473
474static int kvm_hpp_list__parse(struct perf_hpp_list *hpp_list,
475 const char *output_, const char *sort_)
476{
477 char *output = output_ ? strdup(output_) : NULL;
478 char *sort = sort_ ? strdup(sort_) : NULL;
479 int ret;
480
481 ret = kvm_hpp_list__init(output, hpp_list, kvm_hists__init_output);
482 if (ret)
483 goto out;
484
485 ret = kvm_hpp_list__init(sort, hpp_list, kvm_hists__init_sort);
486 if (ret)
487 goto out;
488
489 /* Copy sort keys to output fields */
490 perf_hpp__setup_output_field(hpp_list);
491
492 /* and then copy output fields to sort keys */
493 perf_hpp__append_sort_keys(hpp_list);
494out:
495 free(output);
496 free(sort);
497 return ret;
498}
499
500static int kvm_hists__init(void)
501{
502 kvm_hists.list.nr_header_lines = 1;
503 __hists__init(&kvm_hists.hists, &kvm_hists.list);
504 perf_hpp_list__init(&kvm_hists.list);
505 return kvm_hpp_list__parse(&kvm_hists.list, NULL, "ev_name");
506}
507
508static int kvm_hists__reinit(const char *output, const char *sort)
509{
510 perf_hpp__reset_output_field(&kvm_hists.list);
511 return kvm_hpp_list__parse(&kvm_hists.list, output, sort);
512}
513static void print_result(struct perf_kvm_stat *kvm);
514
515#ifdef HAVE_SLANG_SUPPORT
516static void kvm_browser__update_nr_entries(struct hist_browser *hb)
517{
518 struct rb_node *nd = rb_first_cached(&hb->hists->entries);
519 u64 nr_entries = 0;
520
521 for (; nd; nd = rb_next(nd)) {
522 struct hist_entry *he = rb_entry(nd, struct hist_entry,
523 rb_node);
524
525 if (!he->filtered)
526 nr_entries++;
527 }
528
529 hb->nr_non_filtered_entries = nr_entries;
530}
531
532static int kvm_browser__title(struct hist_browser *browser,
533 char *buf, size_t size)
534{
535 scnprintf(buf, size, "KVM event statistics (%lu entries)",
536 browser->nr_non_filtered_entries);
537 return 0;
538}
539
540static struct hist_browser*
541perf_kvm_browser__new(struct hists *hists)
542{
543 struct hist_browser *browser = hist_browser__new(hists);
544
545 if (browser)
546 browser->title = kvm_browser__title;
547
548 return browser;
549}
550
551static int kvm__hists_browse(struct hists *hists)
552{
553 struct hist_browser *browser;
554 int key = -1;
555
556 browser = perf_kvm_browser__new(hists);
557 if (browser == NULL)
558 return -1;
559
560 /* reset abort key so that it can get Ctrl-C as a key */
561 SLang_reset_tty();
562 SLang_init_tty(0, 0, 0);
563
564 kvm_browser__update_nr_entries(browser);
565
566 while (1) {
567 key = hist_browser__run(browser, "? - help", true, 0);
568
569 switch (key) {
570 case 'q':
571 goto out;
572 default:
573 break;
574 }
575 }
576
577out:
578 hist_browser__delete(browser);
579 return 0;
580}
581
582static void kvm_display(struct perf_kvm_stat *kvm)
583{
584 if (!use_browser)
585 print_result(kvm);
586 else
587 kvm__hists_browse(&kvm_hists.hists);
588}
589
590#else
591
592static void kvm_display(struct perf_kvm_stat *kvm)
593{
594 use_browser = 0;
595 print_result(kvm);
596}
597
598#endif /* HAVE_SLANG_SUPPORT */
599
600#endif // defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
601
602static const char *get_filename_for_perf_kvm(void)
603{
604 const char *filename;
605
606 if (perf_host && !perf_guest)
607 filename = strdup("perf.data.host");
608 else if (!perf_host && perf_guest)
609 filename = strdup("perf.data.guest");
610 else
611 filename = strdup("perf.data.kvm");
612
613 return filename;
614}
615
616#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
617
618void exit_event_get_key(struct evsel *evsel,
619 struct perf_sample *sample,
620 struct event_key *key)
621{
622 key->info = 0;
623 key->key = evsel__intval(evsel, sample, kvm_exit_reason);
624}
625
626bool kvm_exit_event(struct evsel *evsel)
627{
628 return evsel__name_is(evsel, kvm_exit_trace);
629}
630
631bool exit_event_begin(struct evsel *evsel,
632 struct perf_sample *sample, struct event_key *key)
633{
634 if (kvm_exit_event(evsel)) {
635 exit_event_get_key(evsel, sample, key);
636 return true;
637 }
638
639 return false;
640}
641
642bool kvm_entry_event(struct evsel *evsel)
643{
644 return evsel__name_is(evsel, kvm_entry_trace);
645}
646
647bool exit_event_end(struct evsel *evsel,
648 struct perf_sample *sample __maybe_unused,
649 struct event_key *key __maybe_unused)
650{
651 return kvm_entry_event(evsel);
652}
653
654static const char *get_exit_reason(struct perf_kvm_stat *kvm,
655 struct exit_reasons_table *tbl,
656 u64 exit_code)
657{
658 while (tbl->reason != NULL) {
659 if (tbl->exit_code == exit_code)
660 return tbl->reason;
661 tbl++;
662 }
663
664 pr_err("unknown kvm exit code:%lld on %s\n",
665 (unsigned long long)exit_code, kvm->exit_reasons_isa);
666 return "UNKNOWN";
667}
668
669void exit_event_decode_key(struct perf_kvm_stat *kvm,
670 struct event_key *key,
671 char *decode)
672{
673 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
674 key->key);
675
676 scnprintf(decode, KVM_EVENT_NAME_LEN, "%s", exit_reason);
677}
678
679static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
680{
681 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
682
683 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
684 if (!strcmp(events_ops->name, kvm->report_event)) {
685 kvm->events_ops = events_ops->ops;
686 return true;
687 }
688 }
689
690 return false;
691}
692
693struct vcpu_event_record {
694 int vcpu_id;
695 u64 start_time;
696 struct kvm_event *last_event;
697};
698
699#ifdef HAVE_TIMERFD_SUPPORT
700static void clear_events_cache_stats(void)
701{
702 struct rb_root_cached *root;
703 struct rb_node *nd;
704 struct kvm_event *event;
705 int i;
706
707 if (hists__has(&kvm_hists.hists, need_collapse))
708 root = &kvm_hists.hists.entries_collapsed;
709 else
710 root = kvm_hists.hists.entries_in;
711
712 for (nd = rb_first_cached(root); nd; nd = rb_next(nd)) {
713 struct hist_entry *he;
714
715 he = rb_entry(nd, struct hist_entry, rb_node_in);
716 event = container_of(he, struct kvm_event, he);
717
718 /* reset stats for event */
719 event->total.time = 0;
720 init_stats(&event->total.stats);
721
722 for (i = 0; i < event->max_vcpu; ++i) {
723 event->vcpu[i].time = 0;
724 init_stats(&event->vcpu[i].stats);
725 }
726 }
727}
728#endif
729
730static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
731{
732 int old_max_vcpu = event->max_vcpu;
733 void *prev;
734
735 if (vcpu_id < event->max_vcpu)
736 return true;
737
738 while (event->max_vcpu <= vcpu_id)
739 event->max_vcpu += DEFAULT_VCPU_NUM;
740
741 prev = event->vcpu;
742 event->vcpu = realloc(event->vcpu,
743 event->max_vcpu * sizeof(*event->vcpu));
744 if (!event->vcpu) {
745 free(prev);
746 pr_err("Not enough memory\n");
747 return false;
748 }
749
750 memset(event->vcpu + old_max_vcpu, 0,
751 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
752 return true;
753}
754
755static void *kvm_he_zalloc(size_t size)
756{
757 struct kvm_event *kvm_ev;
758
759 kvm_ev = zalloc(size + sizeof(*kvm_ev));
760 if (!kvm_ev)
761 return NULL;
762
763 init_stats(&kvm_ev->total.stats);
764 hists__inc_nr_samples(&kvm_hists.hists, 0);
765 return &kvm_ev->he;
766}
767
768static void kvm_he_free(void *he)
769{
770 struct kvm_event *kvm_ev;
771
772 kvm_ev = container_of(he, struct kvm_event, he);
773 free(kvm_ev);
774}
775
776static struct hist_entry_ops kvm_ev_entry_ops = {
777 .new = kvm_he_zalloc,
778 .free = kvm_he_free,
779};
780
781static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
782 struct event_key *key,
783 struct perf_sample *sample)
784{
785 struct kvm_event *event;
786 struct hist_entry *he;
787 struct kvm_info *ki;
788
789 BUG_ON(key->key == INVALID_KEY);
790
791 ki = kvm_info__new();
792 if (!ki) {
793 pr_err("Failed to allocate kvm info\n");
794 return NULL;
795 }
796
797 kvm->events_ops->decode_key(kvm, key, ki->name);
798 he = hists__add_entry_ops(&kvm_hists.hists, &kvm_ev_entry_ops,
799 &kvm->al, NULL, NULL, NULL, ki, sample, true);
800 if (he == NULL) {
801 pr_err("Failed to allocate hist entry\n");
802 free(ki);
803 return NULL;
804 }
805
806 event = container_of(he, struct kvm_event, he);
807 if (!event->perf_kvm) {
808 event->perf_kvm = kvm;
809 event->key = *key;
810 }
811
812 return event;
813}
814
815static bool handle_begin_event(struct perf_kvm_stat *kvm,
816 struct vcpu_event_record *vcpu_record,
817 struct event_key *key,
818 struct perf_sample *sample)
819{
820 struct kvm_event *event = NULL;
821
822 if (key->key != INVALID_KEY)
823 event = find_create_kvm_event(kvm, key, sample);
824
825 vcpu_record->last_event = event;
826 vcpu_record->start_time = sample->time;
827 return true;
828}
829
830static void
831kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
832{
833 kvm_stats->time += time_diff;
834 update_stats(&kvm_stats->stats, time_diff);
835}
836
837static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
838{
839 struct kvm_event_stats *kvm_stats = &event->total;
840
841 if (vcpu_id != -1)
842 kvm_stats = &event->vcpu[vcpu_id];
843
844 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
845 avg_stats(&kvm_stats->stats));
846}
847
848static bool update_kvm_event(struct perf_kvm_stat *kvm,
849 struct kvm_event *event, int vcpu_id,
850 u64 time_diff)
851{
852 /* Update overall statistics */
853 kvm->total_count++;
854 kvm->total_time += time_diff;
855
856 if (vcpu_id == -1) {
857 kvm_update_event_stats(&event->total, time_diff);
858 return true;
859 }
860
861 if (!kvm_event_expand(event, vcpu_id))
862 return false;
863
864 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
865 return true;
866}
867
868static bool is_child_event(struct perf_kvm_stat *kvm,
869 struct evsel *evsel,
870 struct perf_sample *sample,
871 struct event_key *key)
872{
873 struct child_event_ops *child_ops;
874
875 child_ops = kvm->events_ops->child_ops;
876
877 if (!child_ops)
878 return false;
879
880 for (; child_ops->name; child_ops++) {
881 if (evsel__name_is(evsel, child_ops->name)) {
882 child_ops->get_key(evsel, sample, key);
883 return true;
884 }
885 }
886
887 return false;
888}
889
890static bool handle_child_event(struct perf_kvm_stat *kvm,
891 struct vcpu_event_record *vcpu_record,
892 struct event_key *key,
893 struct perf_sample *sample)
894{
895 struct kvm_event *event = NULL;
896
897 if (key->key != INVALID_KEY)
898 event = find_create_kvm_event(kvm, key, sample);
899
900 vcpu_record->last_event = event;
901
902 return true;
903}
904
905static bool skip_event(const char *event)
906{
907 const char * const *skip_events;
908
909 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
910 if (!strcmp(event, *skip_events))
911 return true;
912
913 return false;
914}
915
916static bool handle_end_event(struct perf_kvm_stat *kvm,
917 struct vcpu_event_record *vcpu_record,
918 struct event_key *key,
919 struct perf_sample *sample)
920{
921 struct kvm_event *event;
922 u64 time_begin, time_diff;
923 int vcpu;
924
925 if (kvm->trace_vcpu == -1)
926 vcpu = -1;
927 else
928 vcpu = vcpu_record->vcpu_id;
929
930 event = vcpu_record->last_event;
931 time_begin = vcpu_record->start_time;
932
933 /* The begin event is not caught. */
934 if (!time_begin)
935 return true;
936
937 /*
938 * In some case, the 'begin event' only records the start timestamp,
939 * the actual event is recognized in the 'end event' (e.g. mmio-event).
940 */
941
942 /* Both begin and end events did not get the key. */
943 if (!event && key->key == INVALID_KEY)
944 return true;
945
946 if (!event)
947 event = find_create_kvm_event(kvm, key, sample);
948
949 if (!event)
950 return false;
951
952 vcpu_record->last_event = NULL;
953 vcpu_record->start_time = 0;
954
955 /* seems to happen once in a while during live mode */
956 if (sample->time < time_begin) {
957 pr_debug("End time before begin time; skipping event.\n");
958 return true;
959 }
960
961 time_diff = sample->time - time_begin;
962
963 if (kvm->duration && time_diff > kvm->duration) {
964 char decode[KVM_EVENT_NAME_LEN];
965
966 kvm->events_ops->decode_key(kvm, &event->key, decode);
967 if (!skip_event(decode)) {
968 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
969 sample->time, sample->pid, vcpu_record->vcpu_id,
970 decode, time_diff / NSEC_PER_USEC);
971 }
972 }
973
974 return update_kvm_event(kvm, event, vcpu, time_diff);
975}
976
977static
978struct vcpu_event_record *per_vcpu_record(struct thread *thread,
979 struct evsel *evsel,
980 struct perf_sample *sample)
981{
982 /* Only kvm_entry records vcpu id. */
983 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
984 struct vcpu_event_record *vcpu_record;
985
986 vcpu_record = zalloc(sizeof(*vcpu_record));
987 if (!vcpu_record) {
988 pr_err("%s: Not enough memory\n", __func__);
989 return NULL;
990 }
991
992 vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str);
993 thread__set_priv(thread, vcpu_record);
994 }
995
996 return thread__priv(thread);
997}
998
999static bool handle_kvm_event(struct perf_kvm_stat *kvm,
1000 struct thread *thread,
1001 struct evsel *evsel,
1002 struct perf_sample *sample)
1003{
1004 struct vcpu_event_record *vcpu_record;
1005 struct event_key key = { .key = INVALID_KEY,
1006 .exit_reasons = kvm->exit_reasons };
1007
1008 vcpu_record = per_vcpu_record(thread, evsel, sample);
1009 if (!vcpu_record)
1010 return true;
1011
1012 /* only process events for vcpus user cares about */
1013 if ((kvm->trace_vcpu != -1) &&
1014 (kvm->trace_vcpu != vcpu_record->vcpu_id))
1015 return true;
1016
1017 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
1018 return handle_begin_event(kvm, vcpu_record, &key, sample);
1019
1020 if (is_child_event(kvm, evsel, sample, &key))
1021 return handle_child_event(kvm, vcpu_record, &key, sample);
1022
1023 if (kvm->events_ops->is_end_event(evsel, sample, &key))
1024 return handle_end_event(kvm, vcpu_record, &key, sample);
1025
1026 return true;
1027}
1028
1029static bool is_valid_key(struct perf_kvm_stat *kvm)
1030{
1031 static const char *key_array[] = {
1032 "ev_name", "sample", "time", "max_t", "min_t", "mean_t",
1033 };
1034 unsigned int i;
1035
1036 for (i = 0; i < ARRAY_SIZE(key_array); i++)
1037 if (!strcmp(key_array[i], kvm->sort_key))
1038 return true;
1039
1040 pr_err("Unsupported sort key: %s\n", kvm->sort_key);
1041 return false;
1042}
1043
1044static bool event_is_valid(struct kvm_event *event, int vcpu)
1045{
1046 return !!get_event_count(event, vcpu);
1047}
1048
1049static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
1050{
1051 struct kvm_event *event;
1052 struct perf_kvm_stat *perf_kvm;
1053
1054 event = container_of(he, struct kvm_event, he);
1055 perf_kvm = event->perf_kvm;
1056 if (!event_is_valid(event, perf_kvm->trace_vcpu))
1057 he->filtered = 1;
1058 else
1059 he->filtered = 0;
1060 return 0;
1061}
1062
1063static void sort_result(struct perf_kvm_stat *kvm)
1064{
1065 struct ui_progress prog;
1066 const char *output_columns = "ev_name,sample,percent_sample,"
1067 "time,percent_time,max_t,min_t,mean_t";
1068
1069 kvm_hists__reinit(output_columns, kvm->sort_key);
1070 ui_progress__init(&prog, kvm_hists.hists.nr_entries, "Sorting...");
1071 hists__collapse_resort(&kvm_hists.hists, NULL);
1072 hists__output_resort_cb(&kvm_hists.hists, NULL, filter_cb);
1073 ui_progress__finish();
1074}
1075
1076static void print_vcpu_info(struct perf_kvm_stat *kvm)
1077{
1078 int vcpu = kvm->trace_vcpu;
1079
1080 pr_info("Analyze events for ");
1081
1082 if (kvm->opts.target.system_wide)
1083 pr_info("all VMs, ");
1084 else if (kvm->opts.target.pid)
1085 pr_info("pid(s) %s, ", kvm->opts.target.pid);
1086 else
1087 pr_info("dazed and confused on what is monitored, ");
1088
1089 if (vcpu == -1)
1090 pr_info("all VCPUs:\n\n");
1091 else
1092 pr_info("VCPU %d:\n\n", vcpu);
1093}
1094
1095static void show_timeofday(void)
1096{
1097 char date[64];
1098 struct timeval tv;
1099 struct tm ltime;
1100
1101 gettimeofday(&tv, NULL);
1102 if (localtime_r(&tv.tv_sec, <ime)) {
1103 strftime(date, sizeof(date), "%H:%M:%S", <ime);
1104 pr_info("%s.%06ld", date, tv.tv_usec);
1105 } else
1106 pr_info("00:00:00.000000");
1107
1108 return;
1109}
1110
1111static void print_result(struct perf_kvm_stat *kvm)
1112{
1113 char decode[KVM_EVENT_NAME_LEN];
1114 struct kvm_event *event;
1115 int vcpu = kvm->trace_vcpu;
1116 struct rb_node *nd;
1117
1118 if (kvm->live) {
1119 puts(CONSOLE_CLEAR);
1120 show_timeofday();
1121 }
1122
1123 pr_info("\n\n");
1124 print_vcpu_info(kvm);
1125 pr_info("%*s ", KVM_EVENT_NAME_LEN, kvm->events_ops->name);
1126 pr_info("%10s ", "Samples");
1127 pr_info("%9s ", "Samples%");
1128
1129 pr_info("%9s ", "Time%");
1130 pr_info("%11s ", "Min Time");
1131 pr_info("%11s ", "Max Time");
1132 pr_info("%16s ", "Avg time");
1133 pr_info("\n\n");
1134
1135 for (nd = rb_first_cached(&kvm_hists.hists.entries); nd; nd = rb_next(nd)) {
1136 struct hist_entry *he;
1137 u64 ecount, etime, max, min;
1138
1139 he = rb_entry(nd, struct hist_entry, rb_node);
1140 if (he->filtered)
1141 continue;
1142
1143 event = container_of(he, struct kvm_event, he);
1144 ecount = get_event_count(event, vcpu);
1145 etime = get_event_time(event, vcpu);
1146 max = get_event_max(event, vcpu);
1147 min = get_event_min(event, vcpu);
1148
1149 kvm->events_ops->decode_key(kvm, &event->key, decode);
1150 pr_info("%*s ", KVM_EVENT_NAME_LEN, decode);
1151 pr_info("%10llu ", (unsigned long long)ecount);
1152 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
1153 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
1154 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
1155 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
1156 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
1157 kvm_event_rel_stddev(vcpu, event));
1158 pr_info("\n");
1159 }
1160
1161 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
1162 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
1163
1164 if (kvm->lost_events)
1165 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
1166}
1167
1168#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1169static int process_lost_event(const struct perf_tool *tool,
1170 union perf_event *event __maybe_unused,
1171 struct perf_sample *sample __maybe_unused,
1172 struct machine *machine __maybe_unused)
1173{
1174 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
1175
1176 kvm->lost_events++;
1177 return 0;
1178}
1179#endif
1180
1181static bool skip_sample(struct perf_kvm_stat *kvm,
1182 struct perf_sample *sample)
1183{
1184 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
1185 return true;
1186
1187 return false;
1188}
1189
1190static int process_sample_event(const struct perf_tool *tool,
1191 union perf_event *event,
1192 struct perf_sample *sample,
1193 struct evsel *evsel,
1194 struct machine *machine)
1195{
1196 int err = 0;
1197 struct thread *thread;
1198 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
1199 tool);
1200
1201 if (skip_sample(kvm, sample))
1202 return 0;
1203
1204 if (machine__resolve(machine, &kvm->al, sample) < 0) {
1205 pr_warning("Fail to resolve address location, skip sample.\n");
1206 return 0;
1207 }
1208
1209 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
1210 if (thread == NULL) {
1211 pr_debug("problem processing %d event, skipping it.\n",
1212 event->header.type);
1213 return -1;
1214 }
1215
1216 if (!handle_kvm_event(kvm, thread, evsel, sample))
1217 err = -1;
1218
1219 thread__put(thread);
1220 return err;
1221}
1222
1223static int cpu_isa_config(struct perf_kvm_stat *kvm)
1224{
1225 char buf[128], *cpuid;
1226 int err;
1227
1228 if (kvm->live) {
1229 struct perf_cpu cpu = {-1};
1230
1231 err = get_cpuid(buf, sizeof(buf), cpu);
1232 if (err != 0) {
1233 pr_err("Failed to look up CPU type: %s\n",
1234 str_error_r(err, buf, sizeof(buf)));
1235 return -err;
1236 }
1237 cpuid = buf;
1238 } else
1239 cpuid = kvm->session->header.env.cpuid;
1240
1241 if (!cpuid) {
1242 pr_err("Failed to look up CPU type\n");
1243 return -EINVAL;
1244 }
1245
1246 err = cpu_isa_init(kvm, cpuid);
1247 if (err == -ENOTSUP)
1248 pr_err("CPU %s is not supported.\n", cpuid);
1249
1250 return err;
1251}
1252
1253static bool verify_vcpu(int vcpu)
1254{
1255 if (vcpu != -1 && vcpu < 0) {
1256 pr_err("Invalid vcpu:%d.\n", vcpu);
1257 return false;
1258 }
1259
1260 return true;
1261}
1262
1263#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1264/* keeping the max events to a modest level to keep
1265 * the processing of samples per mmap smooth.
1266 */
1267#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
1268
1269static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
1270 u64 *mmap_time)
1271{
1272 struct evlist *evlist = kvm->evlist;
1273 union perf_event *event;
1274 struct mmap *md;
1275 u64 timestamp;
1276 s64 n = 0;
1277 int err;
1278
1279 *mmap_time = ULLONG_MAX;
1280 md = &evlist->mmap[idx];
1281 err = perf_mmap__read_init(&md->core);
1282 if (err < 0)
1283 return (err == -EAGAIN) ? 0 : -1;
1284
1285 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
1286 err = evlist__parse_sample_timestamp(evlist, event, ×tamp);
1287 if (err) {
1288 perf_mmap__consume(&md->core);
1289 pr_err("Failed to parse sample\n");
1290 return -1;
1291 }
1292
1293 err = perf_session__queue_event(kvm->session, event, timestamp, 0, NULL);
1294 /*
1295 * FIXME: Here we can't consume the event, as perf_session__queue_event will
1296 * point to it, and it'll get possibly overwritten by the kernel.
1297 */
1298 perf_mmap__consume(&md->core);
1299
1300 if (err) {
1301 pr_err("Failed to enqueue sample: %d\n", err);
1302 return -1;
1303 }
1304
1305 /* save time stamp of our first sample for this mmap */
1306 if (n == 0)
1307 *mmap_time = timestamp;
1308
1309 /* limit events per mmap handled all at once */
1310 n++;
1311 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
1312 break;
1313 }
1314
1315 perf_mmap__read_done(&md->core);
1316 return n;
1317}
1318
1319static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
1320{
1321 int i, err, throttled = 0;
1322 s64 n, ntotal = 0;
1323 u64 flush_time = ULLONG_MAX, mmap_time;
1324
1325 for (i = 0; i < kvm->evlist->core.nr_mmaps; i++) {
1326 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
1327 if (n < 0)
1328 return -1;
1329
1330 /* flush time is going to be the minimum of all the individual
1331 * mmap times. Essentially, we flush all the samples queued up
1332 * from the last pass under our minimal start time -- that leaves
1333 * a very small race for samples to come in with a lower timestamp.
1334 * The ioctl to return the perf_clock timestamp should close the
1335 * race entirely.
1336 */
1337 if (mmap_time < flush_time)
1338 flush_time = mmap_time;
1339
1340 ntotal += n;
1341 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
1342 throttled = 1;
1343 }
1344
1345 /* flush queue after each round in which we processed events */
1346 if (ntotal) {
1347 struct ordered_events *oe = &kvm->session->ordered_events;
1348
1349 oe->next_flush = flush_time;
1350 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
1351 if (err) {
1352 if (kvm->lost_events)
1353 pr_info("\nLost events: %" PRIu64 "\n\n",
1354 kvm->lost_events);
1355 return err;
1356 }
1357 }
1358
1359 return throttled;
1360}
1361
1362static volatile int done;
1363
1364static void sig_handler(int sig __maybe_unused)
1365{
1366 done = 1;
1367}
1368
1369static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
1370{
1371 struct itimerspec new_value;
1372 int rc = -1;
1373
1374 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
1375 if (kvm->timerfd < 0) {
1376 pr_err("timerfd_create failed\n");
1377 goto out;
1378 }
1379
1380 new_value.it_value.tv_sec = kvm->display_time;
1381 new_value.it_value.tv_nsec = 0;
1382 new_value.it_interval.tv_sec = kvm->display_time;
1383 new_value.it_interval.tv_nsec = 0;
1384
1385 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
1386 pr_err("timerfd_settime failed: %d\n", errno);
1387 close(kvm->timerfd);
1388 goto out;
1389 }
1390
1391 rc = 0;
1392out:
1393 return rc;
1394}
1395
1396static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
1397{
1398 uint64_t c;
1399 int rc;
1400
1401 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
1402 if (rc < 0) {
1403 if (errno == EAGAIN)
1404 return 0;
1405
1406 pr_err("Failed to read timer fd: %d\n", errno);
1407 return -1;
1408 }
1409
1410 if (rc != sizeof(uint64_t)) {
1411 pr_err("Error reading timer fd - invalid size returned\n");
1412 return -1;
1413 }
1414
1415 if (c != 1)
1416 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
1417
1418 /* update display */
1419 sort_result(kvm);
1420 print_result(kvm);
1421
1422 /* Reset sort list to "ev_name" */
1423 kvm_hists__reinit(NULL, "ev_name");
1424
1425 /* reset counts */
1426 clear_events_cache_stats();
1427 kvm->total_count = 0;
1428 kvm->total_time = 0;
1429 kvm->lost_events = 0;
1430
1431 return 0;
1432}
1433
1434static int fd_set_nonblock(int fd)
1435{
1436 long arg = 0;
1437
1438 arg = fcntl(fd, F_GETFL);
1439 if (arg < 0) {
1440 pr_err("Failed to get current flags for fd %d\n", fd);
1441 return -1;
1442 }
1443
1444 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
1445 pr_err("Failed to set non-block option on fd %d\n", fd);
1446 return -1;
1447 }
1448
1449 return 0;
1450}
1451
1452static int perf_kvm__handle_stdin(void)
1453{
1454 int c;
1455
1456 c = getc(stdin);
1457 if (c == 'q')
1458 return 1;
1459
1460 return 0;
1461}
1462
1463static int kvm_events_live_report(struct perf_kvm_stat *kvm)
1464{
1465 int nr_stdin, ret, err = -EINVAL;
1466 struct termios save;
1467
1468 /* live flag must be set first */
1469 kvm->live = true;
1470
1471 ret = cpu_isa_config(kvm);
1472 if (ret < 0)
1473 return ret;
1474
1475 if (!verify_vcpu(kvm->trace_vcpu) ||
1476 !is_valid_key(kvm) ||
1477 !register_kvm_events_ops(kvm)) {
1478 goto out;
1479 }
1480
1481 set_term_quiet_input(&save);
1482
1483 kvm_hists__init();
1484
1485 signal(SIGINT, sig_handler);
1486 signal(SIGTERM, sig_handler);
1487
1488 /* add timer fd */
1489 if (perf_kvm__timerfd_create(kvm) < 0) {
1490 err = -1;
1491 goto out;
1492 }
1493
1494 if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
1495 goto out;
1496
1497 nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin));
1498 if (nr_stdin < 0)
1499 goto out;
1500
1501 if (fd_set_nonblock(fileno(stdin)) != 0)
1502 goto out;
1503
1504 /* everything is good - enable the events and process */
1505 evlist__enable(kvm->evlist);
1506
1507 while (!done) {
1508 struct fdarray *fda = &kvm->evlist->core.pollfd;
1509 int rc;
1510
1511 rc = perf_kvm__mmap_read(kvm);
1512 if (rc < 0)
1513 break;
1514
1515 err = perf_kvm__handle_timerfd(kvm);
1516 if (err)
1517 goto out;
1518
1519 if (fda->entries[nr_stdin].revents & POLLIN)
1520 done = perf_kvm__handle_stdin();
1521
1522 if (!rc && !done)
1523 err = evlist__poll(kvm->evlist, 100);
1524 }
1525
1526 evlist__disable(kvm->evlist);
1527
1528 if (err == 0) {
1529 sort_result(kvm);
1530 print_result(kvm);
1531 }
1532
1533out:
1534 hists__delete_entries(&kvm_hists.hists);
1535
1536 if (kvm->timerfd >= 0)
1537 close(kvm->timerfd);
1538
1539 tcsetattr(0, TCSAFLUSH, &save);
1540 return err;
1541}
1542
1543static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1544{
1545 int err, rc = -1;
1546 struct evsel *pos;
1547 struct evlist *evlist = kvm->evlist;
1548 char sbuf[STRERR_BUFSIZE];
1549
1550 evlist__config(evlist, &kvm->opts, NULL);
1551
1552 /*
1553 * Note: exclude_{guest,host} do not apply here.
1554 * This command processes KVM tracepoints from host only
1555 */
1556 evlist__for_each_entry(evlist, pos) {
1557 struct perf_event_attr *attr = &pos->core.attr;
1558
1559 /* make sure these *are* set */
1560 evsel__set_sample_bit(pos, TID);
1561 evsel__set_sample_bit(pos, TIME);
1562 evsel__set_sample_bit(pos, CPU);
1563 evsel__set_sample_bit(pos, RAW);
1564 /* make sure these are *not*; want as small a sample as possible */
1565 evsel__reset_sample_bit(pos, PERIOD);
1566 evsel__reset_sample_bit(pos, IP);
1567 evsel__reset_sample_bit(pos, CALLCHAIN);
1568 evsel__reset_sample_bit(pos, ADDR);
1569 evsel__reset_sample_bit(pos, READ);
1570 attr->mmap = 0;
1571 attr->comm = 0;
1572 attr->task = 0;
1573
1574 attr->sample_period = 1;
1575
1576 attr->watermark = 0;
1577 attr->wakeup_events = 1000;
1578
1579 /* will enable all once we are ready */
1580 attr->disabled = 1;
1581 }
1582
1583 err = evlist__open(evlist);
1584 if (err < 0) {
1585 printf("Couldn't create the events: %s\n",
1586 str_error_r(errno, sbuf, sizeof(sbuf)));
1587 goto out;
1588 }
1589
1590 if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1591 ui__error("Failed to mmap the events: %s\n",
1592 str_error_r(errno, sbuf, sizeof(sbuf)));
1593 evlist__close(evlist);
1594 goto out;
1595 }
1596
1597 rc = 0;
1598
1599out:
1600 return rc;
1601}
1602#endif
1603
1604static int read_events(struct perf_kvm_stat *kvm)
1605{
1606 int ret;
1607
1608 struct perf_data file = {
1609 .path = kvm->file_name,
1610 .mode = PERF_DATA_MODE_READ,
1611 .force = kvm->force,
1612 };
1613
1614 perf_tool__init(&kvm->tool, /*ordered_events=*/true);
1615 kvm->tool.sample = process_sample_event;
1616 kvm->tool.comm = perf_event__process_comm;
1617 kvm->tool.namespaces = perf_event__process_namespaces;
1618
1619 kvm->session = perf_session__new(&file, &kvm->tool);
1620 if (IS_ERR(kvm->session)) {
1621 pr_err("Initializing perf session failed\n");
1622 return PTR_ERR(kvm->session);
1623 }
1624
1625 symbol__init(&kvm->session->header.env);
1626
1627 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1628 ret = -EINVAL;
1629 goto out_delete;
1630 }
1631
1632 /*
1633 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1634 * traced in the old kernel.
1635 */
1636 ret = cpu_isa_config(kvm);
1637 if (ret < 0)
1638 goto out_delete;
1639
1640 ret = perf_session__process_events(kvm->session);
1641
1642out_delete:
1643 perf_session__delete(kvm->session);
1644 return ret;
1645}
1646
1647static int parse_target_str(struct perf_kvm_stat *kvm)
1648{
1649 if (kvm->opts.target.pid) {
1650 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1651 if (kvm->pid_list == NULL) {
1652 pr_err("Error parsing process id string\n");
1653 return -EINVAL;
1654 }
1655 }
1656
1657 return 0;
1658}
1659
1660static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1661{
1662 int ret = -EINVAL;
1663 int vcpu = kvm->trace_vcpu;
1664
1665 if (parse_target_str(kvm) != 0)
1666 goto exit;
1667
1668 if (!verify_vcpu(vcpu))
1669 goto exit;
1670
1671 if (!is_valid_key(kvm))
1672 goto exit;
1673
1674 if (!register_kvm_events_ops(kvm))
1675 goto exit;
1676
1677 if (kvm->use_stdio) {
1678 use_browser = 0;
1679 setup_pager();
1680 } else {
1681 use_browser = 1;
1682 }
1683
1684 setup_browser(false);
1685
1686 kvm_hists__init();
1687
1688 ret = read_events(kvm);
1689 if (ret)
1690 goto exit;
1691
1692 sort_result(kvm);
1693 kvm_display(kvm);
1694
1695exit:
1696 hists__delete_entries(&kvm_hists.hists);
1697 return ret;
1698}
1699
1700#define STRDUP_FAIL_EXIT(s) \
1701 ({ char *_p; \
1702 _p = strdup(s); \
1703 if (!_p) \
1704 return -ENOMEM; \
1705 _p; \
1706 })
1707
1708int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1709{
1710 return 0;
1711}
1712
1713static int
1714kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1715{
1716 unsigned int rec_argc, i, j, events_tp_size;
1717 const char **rec_argv;
1718 const char * const record_args[] = {
1719 "record",
1720 "-R",
1721 "-m", "1024",
1722 "-c", "1",
1723 };
1724 const char * const kvm_stat_record_usage[] = {
1725 "perf kvm stat record [<options>]",
1726 NULL
1727 };
1728 const char * const *events_tp;
1729 int ret;
1730
1731 events_tp_size = 0;
1732 ret = setup_kvm_events_tp(kvm);
1733 if (ret < 0) {
1734 pr_err("Unable to setup the kvm tracepoints\n");
1735 return ret;
1736 }
1737
1738 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1739 events_tp_size++;
1740
1741 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1742 2 * events_tp_size;
1743 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1744
1745 if (rec_argv == NULL)
1746 return -ENOMEM;
1747
1748 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1749 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1750
1751 for (j = 0; j < events_tp_size; j++) {
1752 rec_argv[i++] = "-e";
1753 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1754 }
1755
1756 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1757 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1758
1759 for (j = 1; j < (unsigned int)argc; j++, i++)
1760 rec_argv[i] = argv[j];
1761
1762 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1763 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1764 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1765
1766 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1767 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1768 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1769 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1770 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1771 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1772 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1773 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1774 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1775 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1776 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1777 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1778 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1779 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1780 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1781
1782 record_usage = kvm_stat_record_usage;
1783 return cmd_record(i, rec_argv);
1784}
1785
1786static int
1787kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1788{
1789 const struct option kvm_events_report_options[] = {
1790 OPT_STRING(0, "event", &kvm->report_event, "report event",
1791 "event for reporting: vmexit, "
1792 "mmio (x86 only), ioport (x86 only)"),
1793 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1794 "vcpu id to report"),
1795 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1796 "key for sorting: sample(sort by samples number)"
1797 " time (sort by avg time)"),
1798 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1799 "analyze events only for given process id(s)"),
1800 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1801 OPT_BOOLEAN(0, "stdio", &kvm->use_stdio, "use the stdio interface"),
1802 OPT_END()
1803 };
1804
1805 const char * const kvm_events_report_usage[] = {
1806 "perf kvm stat report [<options>]",
1807 NULL
1808 };
1809
1810 if (argc) {
1811 argc = parse_options(argc, argv,
1812 kvm_events_report_options,
1813 kvm_events_report_usage, 0);
1814 if (argc)
1815 usage_with_options(kvm_events_report_usage,
1816 kvm_events_report_options);
1817 }
1818
1819#ifndef HAVE_SLANG_SUPPORT
1820 kvm->use_stdio = true;
1821#endif
1822
1823 if (!kvm->opts.target.pid)
1824 kvm->opts.target.system_wide = true;
1825
1826 return kvm_events_report_vcpu(kvm);
1827}
1828
1829#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1830static struct evlist *kvm_live_event_list(void)
1831{
1832 struct evlist *evlist;
1833 char *tp, *name, *sys;
1834 int err = -1;
1835 const char * const *events_tp;
1836
1837 evlist = evlist__new();
1838 if (evlist == NULL)
1839 return NULL;
1840
1841 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1842
1843 tp = strdup(*events_tp);
1844 if (tp == NULL)
1845 goto out;
1846
1847 /* split tracepoint into subsystem and name */
1848 sys = tp;
1849 name = strchr(tp, ':');
1850 if (name == NULL) {
1851 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1852 *events_tp);
1853 free(tp);
1854 goto out;
1855 }
1856 *name = '\0';
1857 name++;
1858
1859 if (evlist__add_newtp(evlist, sys, name, NULL)) {
1860 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1861 free(tp);
1862 goto out;
1863 }
1864
1865 free(tp);
1866 }
1867
1868 err = 0;
1869
1870out:
1871 if (err) {
1872 evlist__delete(evlist);
1873 evlist = NULL;
1874 }
1875
1876 return evlist;
1877}
1878
1879static int kvm_events_live(struct perf_kvm_stat *kvm,
1880 int argc, const char **argv)
1881{
1882 char errbuf[BUFSIZ];
1883 int err;
1884
1885 const struct option live_options[] = {
1886 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1887 "record events on existing process id"),
1888 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1889 "number of mmap data pages", evlist__parse_mmap_pages),
1890 OPT_INCR('v', "verbose", &verbose,
1891 "be more verbose (show counter open errors, etc)"),
1892 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1893 "system-wide collection from all CPUs"),
1894 OPT_UINTEGER('d', "display", &kvm->display_time,
1895 "time in seconds between display updates"),
1896 OPT_STRING(0, "event", &kvm->report_event, "report event",
1897 "event for reporting: "
1898 "vmexit, mmio (x86 only), ioport (x86 only)"),
1899 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1900 "vcpu id to report"),
1901 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1902 "key for sorting: sample(sort by samples number)"
1903 " time (sort by avg time)"),
1904 OPT_U64(0, "duration", &kvm->duration,
1905 "show events other than"
1906 " HLT (x86 only) or Wait state (s390 only)"
1907 " that take longer than duration usecs"),
1908 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1909 "per thread proc mmap processing timeout in ms"),
1910 OPT_END()
1911 };
1912 const char * const live_usage[] = {
1913 "perf kvm stat live [<options>]",
1914 NULL
1915 };
1916 struct perf_data data = {
1917 .mode = PERF_DATA_MODE_WRITE,
1918 };
1919
1920
1921 /* event handling */
1922 perf_tool__init(&kvm->tool, /*ordered_events=*/true);
1923 kvm->tool.sample = process_sample_event;
1924 kvm->tool.comm = perf_event__process_comm;
1925 kvm->tool.exit = perf_event__process_exit;
1926 kvm->tool.fork = perf_event__process_fork;
1927 kvm->tool.lost = process_lost_event;
1928 kvm->tool.namespaces = perf_event__process_namespaces;
1929
1930 /* set defaults */
1931 kvm->display_time = 1;
1932 kvm->opts.user_interval = 1;
1933 kvm->opts.mmap_pages = 512;
1934 kvm->opts.target.uses_mmap = false;
1935 kvm->opts.target.uid_str = NULL;
1936 kvm->opts.target.uid = UINT_MAX;
1937
1938 symbol__init(NULL);
1939 disable_buildid_cache();
1940
1941 use_browser = 0;
1942
1943 if (argc) {
1944 argc = parse_options(argc, argv, live_options,
1945 live_usage, 0);
1946 if (argc)
1947 usage_with_options(live_usage, live_options);
1948 }
1949
1950 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1951
1952 /*
1953 * target related setups
1954 */
1955 err = target__validate(&kvm->opts.target);
1956 if (err) {
1957 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1958 ui__warning("%s", errbuf);
1959 }
1960
1961 if (target__none(&kvm->opts.target))
1962 kvm->opts.target.system_wide = true;
1963
1964
1965 /*
1966 * generate the event list
1967 */
1968 err = setup_kvm_events_tp(kvm);
1969 if (err < 0) {
1970 pr_err("Unable to setup the kvm tracepoints\n");
1971 return err;
1972 }
1973
1974 kvm->evlist = kvm_live_event_list();
1975 if (kvm->evlist == NULL) {
1976 err = -1;
1977 goto out;
1978 }
1979
1980 if (evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1981 usage_with_options(live_usage, live_options);
1982
1983 /*
1984 * perf session
1985 */
1986 kvm->session = perf_session__new(&data, &kvm->tool);
1987 if (IS_ERR(kvm->session)) {
1988 err = PTR_ERR(kvm->session);
1989 goto out;
1990 }
1991 kvm->session->evlist = kvm->evlist;
1992 perf_session__set_id_hdr_size(kvm->session);
1993 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1994 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1995 kvm->evlist->core.threads, true, false, 1);
1996 err = kvm_live_open_events(kvm);
1997 if (err)
1998 goto out;
1999
2000 err = kvm_events_live_report(kvm);
2001
2002out:
2003 perf_session__delete(kvm->session);
2004 kvm->session = NULL;
2005 evlist__delete(kvm->evlist);
2006
2007 return err;
2008}
2009#endif
2010
2011static void print_kvm_stat_usage(void)
2012{
2013 printf("Usage: perf kvm stat <command>\n\n");
2014
2015 printf("# Available commands:\n");
2016 printf("\trecord: record kvm events\n");
2017 printf("\treport: report statistical data of kvm events\n");
2018 printf("\tlive: live reporting of statistical data of kvm events\n");
2019
2020 printf("\nOtherwise, it is the alias of 'perf stat':\n");
2021}
2022
2023static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
2024{
2025 struct perf_kvm_stat kvm = {
2026 .file_name = file_name,
2027
2028 .trace_vcpu = -1,
2029 .report_event = "vmexit",
2030 .sort_key = "sample",
2031
2032 };
2033
2034 if (argc == 1) {
2035 print_kvm_stat_usage();
2036 goto perf_stat;
2037 }
2038
2039 if (strlen(argv[1]) > 2 && strstarts("record", argv[1]))
2040 return kvm_events_record(&kvm, argc - 1, argv + 1);
2041
2042 if (strlen(argv[1]) > 2 && strstarts("report", argv[1]))
2043 return kvm_events_report(&kvm, argc - 1 , argv + 1);
2044
2045#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
2046 if (!strncmp(argv[1], "live", 4))
2047 return kvm_events_live(&kvm, argc - 1 , argv + 1);
2048#endif
2049
2050perf_stat:
2051 return cmd_stat(argc, argv);
2052}
2053#endif /* HAVE_KVM_STAT_SUPPORT */
2054
2055int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
2056 const char **argv __maybe_unused)
2057{
2058 return 0;
2059}
2060
2061static int __cmd_record(const char *file_name, int argc, const char **argv)
2062{
2063 int rec_argc, i = 0, j, ret;
2064 const char **rec_argv;
2065
2066 ret = kvm_add_default_arch_event(&argc, argv);
2067 if (ret)
2068 return -EINVAL;
2069
2070 rec_argc = argc + 2;
2071 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2072 rec_argv[i++] = strdup("record");
2073 rec_argv[i++] = strdup("-o");
2074 rec_argv[i++] = strdup(file_name);
2075 for (j = 1; j < argc; j++, i++)
2076 rec_argv[i] = argv[j];
2077
2078 BUG_ON(i != rec_argc);
2079
2080 return cmd_record(i, rec_argv);
2081}
2082
2083static int __cmd_report(const char *file_name, int argc, const char **argv)
2084{
2085 int rec_argc, i = 0, j;
2086 const char **rec_argv;
2087
2088 rec_argc = argc + 2;
2089 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2090 rec_argv[i++] = strdup("report");
2091 rec_argv[i++] = strdup("-i");
2092 rec_argv[i++] = strdup(file_name);
2093 for (j = 1; j < argc; j++, i++)
2094 rec_argv[i] = argv[j];
2095
2096 BUG_ON(i != rec_argc);
2097
2098 return cmd_report(i, rec_argv);
2099}
2100
2101static int
2102__cmd_buildid_list(const char *file_name, int argc, const char **argv)
2103{
2104 int rec_argc, i = 0, j;
2105 const char **rec_argv;
2106
2107 rec_argc = argc + 2;
2108 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2109 rec_argv[i++] = strdup("buildid-list");
2110 rec_argv[i++] = strdup("-i");
2111 rec_argv[i++] = strdup(file_name);
2112 for (j = 1; j < argc; j++, i++)
2113 rec_argv[i] = argv[j];
2114
2115 BUG_ON(i != rec_argc);
2116
2117 return cmd_buildid_list(i, rec_argv);
2118}
2119
2120int cmd_kvm(int argc, const char **argv)
2121{
2122 const char *file_name = NULL;
2123 const struct option kvm_options[] = {
2124 OPT_STRING('i', "input", &file_name, "file",
2125 "Input file name"),
2126 OPT_STRING('o', "output", &file_name, "file",
2127 "Output file name"),
2128 OPT_BOOLEAN(0, "guest", &perf_guest,
2129 "Collect guest os data"),
2130 OPT_BOOLEAN(0, "host", &perf_host,
2131 "Collect host os data"),
2132 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
2133 "guest mount directory under which every guest os"
2134 " instance has a subdir"),
2135 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
2136 "file", "file saving guest os vmlinux"),
2137 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
2138 "file", "file saving guest os /proc/kallsyms"),
2139 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
2140 "file", "file saving guest os /proc/modules"),
2141 OPT_BOOLEAN(0, "guest-code", &symbol_conf.guest_code,
2142 "Guest code can be found in hypervisor process"),
2143 OPT_INCR('v', "verbose", &verbose,
2144 "be more verbose (show counter open errors, etc)"),
2145 OPT_END()
2146 };
2147
2148 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
2149 "buildid-list", "stat", NULL };
2150 const char *kvm_usage[] = { NULL, NULL };
2151
2152 exclude_GH_default = true;
2153 perf_host = 0;
2154 perf_guest = 1;
2155
2156 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
2157 PARSE_OPT_STOP_AT_NON_OPTION);
2158 if (!argc)
2159 usage_with_options(kvm_usage, kvm_options);
2160
2161 if (!perf_host)
2162 perf_guest = 1;
2163
2164 if (!file_name) {
2165 file_name = get_filename_for_perf_kvm();
2166
2167 if (!file_name) {
2168 pr_err("Failed to allocate memory for filename\n");
2169 return -ENOMEM;
2170 }
2171 }
2172
2173 if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
2174 return __cmd_record(file_name, argc, argv);
2175 else if (strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2176 return __cmd_report(file_name, argc, argv);
2177 else if (strlen(argv[0]) > 2 && strstarts("diff", argv[0]))
2178 return cmd_diff(argc, argv);
2179 else if (!strcmp(argv[0], "top"))
2180 return cmd_top(argc, argv);
2181 else if (strlen(argv[0]) > 2 && strstarts("buildid-list", argv[0]))
2182 return __cmd_buildid_list(file_name, argc, argv);
2183#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
2184 else if (strlen(argv[0]) > 2 && strstarts("stat", argv[0]))
2185 return kvm_cmd_stat(file_name, argc, argv);
2186#endif
2187 else
2188 usage_with_options(kvm_usage, kvm_options);
2189
2190 /* free usage string allocated by parse_options_subcommand */
2191 free((void *)kvm_usage[0]);
2192
2193 return 0;
2194}