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1// SPDX-License-Identifier: GPL-2.0
2#include "builtin.h"
3#include "perf.h"
4
5#include "util/evsel.h"
6#include "util/evlist.h"
7#include "util/term.h"
8#include "util/util.h"
9#include "util/cache.h"
10#include "util/symbol.h"
11#include "util/thread.h"
12#include "util/header.h"
13#include "util/session.h"
14#include "util/intlist.h"
15#include <subcmd/parse-options.h>
16#include "util/trace-event.h"
17#include "util/debug.h"
18#include "util/tool.h"
19#include "util/stat.h"
20#include "util/top.h"
21#include "util/data.h"
22#include "util/ordered-events.h"
23
24#include <sys/prctl.h>
25#ifdef HAVE_TIMERFD_SUPPORT
26#include <sys/timerfd.h>
27#endif
28#include <sys/time.h>
29#include <sys/types.h>
30#include <sys/stat.h>
31#include <fcntl.h>
32
33#include <linux/kernel.h>
34#include <linux/time64.h>
35#include <errno.h>
36#include <inttypes.h>
37#include <poll.h>
38#include <termios.h>
39#include <semaphore.h>
40#include <signal.h>
41#include <math.h>
42
43static const char *get_filename_for_perf_kvm(void)
44{
45 const char *filename;
46
47 if (perf_host && !perf_guest)
48 filename = strdup("perf.data.host");
49 else if (!perf_host && perf_guest)
50 filename = strdup("perf.data.guest");
51 else
52 filename = strdup("perf.data.kvm");
53
54 return filename;
55}
56
57#ifdef HAVE_KVM_STAT_SUPPORT
58#include "util/kvm-stat.h"
59
60void exit_event_get_key(struct perf_evsel *evsel,
61 struct perf_sample *sample,
62 struct event_key *key)
63{
64 key->info = 0;
65 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
66}
67
68bool kvm_exit_event(struct perf_evsel *evsel)
69{
70 return !strcmp(evsel->name, kvm_exit_trace);
71}
72
73bool exit_event_begin(struct perf_evsel *evsel,
74 struct perf_sample *sample, struct event_key *key)
75{
76 if (kvm_exit_event(evsel)) {
77 exit_event_get_key(evsel, sample, key);
78 return true;
79 }
80
81 return false;
82}
83
84bool kvm_entry_event(struct perf_evsel *evsel)
85{
86 return !strcmp(evsel->name, kvm_entry_trace);
87}
88
89bool exit_event_end(struct perf_evsel *evsel,
90 struct perf_sample *sample __maybe_unused,
91 struct event_key *key __maybe_unused)
92{
93 return kvm_entry_event(evsel);
94}
95
96static const char *get_exit_reason(struct perf_kvm_stat *kvm,
97 struct exit_reasons_table *tbl,
98 u64 exit_code)
99{
100 while (tbl->reason != NULL) {
101 if (tbl->exit_code == exit_code)
102 return tbl->reason;
103 tbl++;
104 }
105
106 pr_err("unknown kvm exit code:%lld on %s\n",
107 (unsigned long long)exit_code, kvm->exit_reasons_isa);
108 return "UNKNOWN";
109}
110
111void exit_event_decode_key(struct perf_kvm_stat *kvm,
112 struct event_key *key,
113 char *decode)
114{
115 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
116 key->key);
117
118 scnprintf(decode, decode_str_len, "%s", exit_reason);
119}
120
121static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
122{
123 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
124
125 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
126 if (!strcmp(events_ops->name, kvm->report_event)) {
127 kvm->events_ops = events_ops->ops;
128 return true;
129 }
130 }
131
132 return false;
133}
134
135struct vcpu_event_record {
136 int vcpu_id;
137 u64 start_time;
138 struct kvm_event *last_event;
139};
140
141
142static void init_kvm_event_record(struct perf_kvm_stat *kvm)
143{
144 unsigned int i;
145
146 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
147 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
148}
149
150#ifdef HAVE_TIMERFD_SUPPORT
151static void clear_events_cache_stats(struct list_head *kvm_events_cache)
152{
153 struct list_head *head;
154 struct kvm_event *event;
155 unsigned int i;
156 int j;
157
158 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
159 head = &kvm_events_cache[i];
160 list_for_each_entry(event, head, hash_entry) {
161 /* reset stats for event */
162 event->total.time = 0;
163 init_stats(&event->total.stats);
164
165 for (j = 0; j < event->max_vcpu; ++j) {
166 event->vcpu[j].time = 0;
167 init_stats(&event->vcpu[j].stats);
168 }
169 }
170 }
171}
172#endif
173
174static int kvm_events_hash_fn(u64 key)
175{
176 return key & (EVENTS_CACHE_SIZE - 1);
177}
178
179static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
180{
181 int old_max_vcpu = event->max_vcpu;
182 void *prev;
183
184 if (vcpu_id < event->max_vcpu)
185 return true;
186
187 while (event->max_vcpu <= vcpu_id)
188 event->max_vcpu += DEFAULT_VCPU_NUM;
189
190 prev = event->vcpu;
191 event->vcpu = realloc(event->vcpu,
192 event->max_vcpu * sizeof(*event->vcpu));
193 if (!event->vcpu) {
194 free(prev);
195 pr_err("Not enough memory\n");
196 return false;
197 }
198
199 memset(event->vcpu + old_max_vcpu, 0,
200 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
201 return true;
202}
203
204static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
205{
206 struct kvm_event *event;
207
208 event = zalloc(sizeof(*event));
209 if (!event) {
210 pr_err("Not enough memory\n");
211 return NULL;
212 }
213
214 event->key = *key;
215 init_stats(&event->total.stats);
216 return event;
217}
218
219static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
220 struct event_key *key)
221{
222 struct kvm_event *event;
223 struct list_head *head;
224
225 BUG_ON(key->key == INVALID_KEY);
226
227 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
228 list_for_each_entry(event, head, hash_entry) {
229 if (event->key.key == key->key && event->key.info == key->info)
230 return event;
231 }
232
233 event = kvm_alloc_init_event(key);
234 if (!event)
235 return NULL;
236
237 list_add(&event->hash_entry, head);
238 return event;
239}
240
241static bool handle_begin_event(struct perf_kvm_stat *kvm,
242 struct vcpu_event_record *vcpu_record,
243 struct event_key *key, u64 timestamp)
244{
245 struct kvm_event *event = NULL;
246
247 if (key->key != INVALID_KEY)
248 event = find_create_kvm_event(kvm, key);
249
250 vcpu_record->last_event = event;
251 vcpu_record->start_time = timestamp;
252 return true;
253}
254
255static void
256kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
257{
258 kvm_stats->time += time_diff;
259 update_stats(&kvm_stats->stats, time_diff);
260}
261
262static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
263{
264 struct kvm_event_stats *kvm_stats = &event->total;
265
266 if (vcpu_id != -1)
267 kvm_stats = &event->vcpu[vcpu_id];
268
269 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
270 avg_stats(&kvm_stats->stats));
271}
272
273static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
274 u64 time_diff)
275{
276 if (vcpu_id == -1) {
277 kvm_update_event_stats(&event->total, time_diff);
278 return true;
279 }
280
281 if (!kvm_event_expand(event, vcpu_id))
282 return false;
283
284 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
285 return true;
286}
287
288static bool is_child_event(struct perf_kvm_stat *kvm,
289 struct perf_evsel *evsel,
290 struct perf_sample *sample,
291 struct event_key *key)
292{
293 struct child_event_ops *child_ops;
294
295 child_ops = kvm->events_ops->child_ops;
296
297 if (!child_ops)
298 return false;
299
300 for (; child_ops->name; child_ops++) {
301 if (!strcmp(evsel->name, child_ops->name)) {
302 child_ops->get_key(evsel, sample, key);
303 return true;
304 }
305 }
306
307 return false;
308}
309
310static bool handle_child_event(struct perf_kvm_stat *kvm,
311 struct vcpu_event_record *vcpu_record,
312 struct event_key *key,
313 struct perf_sample *sample __maybe_unused)
314{
315 struct kvm_event *event = NULL;
316
317 if (key->key != INVALID_KEY)
318 event = find_create_kvm_event(kvm, key);
319
320 vcpu_record->last_event = event;
321
322 return true;
323}
324
325static bool skip_event(const char *event)
326{
327 const char * const *skip_events;
328
329 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
330 if (!strcmp(event, *skip_events))
331 return true;
332
333 return false;
334}
335
336static bool handle_end_event(struct perf_kvm_stat *kvm,
337 struct vcpu_event_record *vcpu_record,
338 struct event_key *key,
339 struct perf_sample *sample)
340{
341 struct kvm_event *event;
342 u64 time_begin, time_diff;
343 int vcpu;
344
345 if (kvm->trace_vcpu == -1)
346 vcpu = -1;
347 else
348 vcpu = vcpu_record->vcpu_id;
349
350 event = vcpu_record->last_event;
351 time_begin = vcpu_record->start_time;
352
353 /* The begin event is not caught. */
354 if (!time_begin)
355 return true;
356
357 /*
358 * In some case, the 'begin event' only records the start timestamp,
359 * the actual event is recognized in the 'end event' (e.g. mmio-event).
360 */
361
362 /* Both begin and end events did not get the key. */
363 if (!event && key->key == INVALID_KEY)
364 return true;
365
366 if (!event)
367 event = find_create_kvm_event(kvm, key);
368
369 if (!event)
370 return false;
371
372 vcpu_record->last_event = NULL;
373 vcpu_record->start_time = 0;
374
375 /* seems to happen once in a while during live mode */
376 if (sample->time < time_begin) {
377 pr_debug("End time before begin time; skipping event.\n");
378 return true;
379 }
380
381 time_diff = sample->time - time_begin;
382
383 if (kvm->duration && time_diff > kvm->duration) {
384 char decode[decode_str_len];
385
386 kvm->events_ops->decode_key(kvm, &event->key, decode);
387 if (!skip_event(decode)) {
388 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
389 sample->time, sample->pid, vcpu_record->vcpu_id,
390 decode, time_diff / NSEC_PER_USEC);
391 }
392 }
393
394 return update_kvm_event(event, vcpu, time_diff);
395}
396
397static
398struct vcpu_event_record *per_vcpu_record(struct thread *thread,
399 struct perf_evsel *evsel,
400 struct perf_sample *sample)
401{
402 /* Only kvm_entry records vcpu id. */
403 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
404 struct vcpu_event_record *vcpu_record;
405
406 vcpu_record = zalloc(sizeof(*vcpu_record));
407 if (!vcpu_record) {
408 pr_err("%s: Not enough memory\n", __func__);
409 return NULL;
410 }
411
412 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
413 vcpu_id_str);
414 thread__set_priv(thread, vcpu_record);
415 }
416
417 return thread__priv(thread);
418}
419
420static bool handle_kvm_event(struct perf_kvm_stat *kvm,
421 struct thread *thread,
422 struct perf_evsel *evsel,
423 struct perf_sample *sample)
424{
425 struct vcpu_event_record *vcpu_record;
426 struct event_key key = { .key = INVALID_KEY,
427 .exit_reasons = kvm->exit_reasons };
428
429 vcpu_record = per_vcpu_record(thread, evsel, sample);
430 if (!vcpu_record)
431 return true;
432
433 /* only process events for vcpus user cares about */
434 if ((kvm->trace_vcpu != -1) &&
435 (kvm->trace_vcpu != vcpu_record->vcpu_id))
436 return true;
437
438 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
439 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
440
441 if (is_child_event(kvm, evsel, sample, &key))
442 return handle_child_event(kvm, vcpu_record, &key, sample);
443
444 if (kvm->events_ops->is_end_event(evsel, sample, &key))
445 return handle_end_event(kvm, vcpu_record, &key, sample);
446
447 return true;
448}
449
450#define GET_EVENT_KEY(func, field) \
451static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
452{ \
453 if (vcpu == -1) \
454 return event->total.field; \
455 \
456 if (vcpu >= event->max_vcpu) \
457 return 0; \
458 \
459 return event->vcpu[vcpu].field; \
460}
461
462#define COMPARE_EVENT_KEY(func, field) \
463GET_EVENT_KEY(func, field) \
464static int compare_kvm_event_ ## func(struct kvm_event *one, \
465 struct kvm_event *two, int vcpu)\
466{ \
467 return get_event_ ##func(one, vcpu) > \
468 get_event_ ##func(two, vcpu); \
469}
470
471GET_EVENT_KEY(time, time);
472COMPARE_EVENT_KEY(count, stats.n);
473COMPARE_EVENT_KEY(mean, stats.mean);
474GET_EVENT_KEY(max, stats.max);
475GET_EVENT_KEY(min, stats.min);
476
477#define DEF_SORT_NAME_KEY(name, compare_key) \
478 { #name, compare_kvm_event_ ## compare_key }
479
480static struct kvm_event_key keys[] = {
481 DEF_SORT_NAME_KEY(sample, count),
482 DEF_SORT_NAME_KEY(time, mean),
483 { NULL, NULL }
484};
485
486static bool select_key(struct perf_kvm_stat *kvm)
487{
488 int i;
489
490 for (i = 0; keys[i].name; i++) {
491 if (!strcmp(keys[i].name, kvm->sort_key)) {
492 kvm->compare = keys[i].key;
493 return true;
494 }
495 }
496
497 pr_err("Unknown compare key:%s\n", kvm->sort_key);
498 return false;
499}
500
501static void insert_to_result(struct rb_root *result, struct kvm_event *event,
502 key_cmp_fun bigger, int vcpu)
503{
504 struct rb_node **rb = &result->rb_node;
505 struct rb_node *parent = NULL;
506 struct kvm_event *p;
507
508 while (*rb) {
509 p = container_of(*rb, struct kvm_event, rb);
510 parent = *rb;
511
512 if (bigger(event, p, vcpu))
513 rb = &(*rb)->rb_left;
514 else
515 rb = &(*rb)->rb_right;
516 }
517
518 rb_link_node(&event->rb, parent, rb);
519 rb_insert_color(&event->rb, result);
520}
521
522static void
523update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
524{
525 int vcpu = kvm->trace_vcpu;
526
527 kvm->total_count += get_event_count(event, vcpu);
528 kvm->total_time += get_event_time(event, vcpu);
529}
530
531static bool event_is_valid(struct kvm_event *event, int vcpu)
532{
533 return !!get_event_count(event, vcpu);
534}
535
536static void sort_result(struct perf_kvm_stat *kvm)
537{
538 unsigned int i;
539 int vcpu = kvm->trace_vcpu;
540 struct kvm_event *event;
541
542 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
543 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
544 if (event_is_valid(event, vcpu)) {
545 update_total_count(kvm, event);
546 insert_to_result(&kvm->result, event,
547 kvm->compare, vcpu);
548 }
549 }
550 }
551}
552
553/* returns left most element of result, and erase it */
554static struct kvm_event *pop_from_result(struct rb_root *result)
555{
556 struct rb_node *node = rb_first(result);
557
558 if (!node)
559 return NULL;
560
561 rb_erase(node, result);
562 return container_of(node, struct kvm_event, rb);
563}
564
565static void print_vcpu_info(struct perf_kvm_stat *kvm)
566{
567 int vcpu = kvm->trace_vcpu;
568
569 pr_info("Analyze events for ");
570
571 if (kvm->opts.target.system_wide)
572 pr_info("all VMs, ");
573 else if (kvm->opts.target.pid)
574 pr_info("pid(s) %s, ", kvm->opts.target.pid);
575 else
576 pr_info("dazed and confused on what is monitored, ");
577
578 if (vcpu == -1)
579 pr_info("all VCPUs:\n\n");
580 else
581 pr_info("VCPU %d:\n\n", vcpu);
582}
583
584static void show_timeofday(void)
585{
586 char date[64];
587 struct timeval tv;
588 struct tm ltime;
589
590 gettimeofday(&tv, NULL);
591 if (localtime_r(&tv.tv_sec, <ime)) {
592 strftime(date, sizeof(date), "%H:%M:%S", <ime);
593 pr_info("%s.%06ld", date, tv.tv_usec);
594 } else
595 pr_info("00:00:00.000000");
596
597 return;
598}
599
600static void print_result(struct perf_kvm_stat *kvm)
601{
602 char decode[decode_str_len];
603 struct kvm_event *event;
604 int vcpu = kvm->trace_vcpu;
605
606 if (kvm->live) {
607 puts(CONSOLE_CLEAR);
608 show_timeofday();
609 }
610
611 pr_info("\n\n");
612 print_vcpu_info(kvm);
613 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
614 pr_info("%10s ", "Samples");
615 pr_info("%9s ", "Samples%");
616
617 pr_info("%9s ", "Time%");
618 pr_info("%11s ", "Min Time");
619 pr_info("%11s ", "Max Time");
620 pr_info("%16s ", "Avg time");
621 pr_info("\n\n");
622
623 while ((event = pop_from_result(&kvm->result))) {
624 u64 ecount, etime, max, min;
625
626 ecount = get_event_count(event, vcpu);
627 etime = get_event_time(event, vcpu);
628 max = get_event_max(event, vcpu);
629 min = get_event_min(event, vcpu);
630
631 kvm->events_ops->decode_key(kvm, &event->key, decode);
632 pr_info("%*s ", decode_str_len, decode);
633 pr_info("%10llu ", (unsigned long long)ecount);
634 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
635 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
636 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
637 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
638 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
639 kvm_event_rel_stddev(vcpu, event));
640 pr_info("\n");
641 }
642
643 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
644 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
645
646 if (kvm->lost_events)
647 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
648}
649
650#ifdef HAVE_TIMERFD_SUPPORT
651static int process_lost_event(struct perf_tool *tool,
652 union perf_event *event __maybe_unused,
653 struct perf_sample *sample __maybe_unused,
654 struct machine *machine __maybe_unused)
655{
656 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
657
658 kvm->lost_events++;
659 return 0;
660}
661#endif
662
663static bool skip_sample(struct perf_kvm_stat *kvm,
664 struct perf_sample *sample)
665{
666 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
667 return true;
668
669 return false;
670}
671
672static int process_sample_event(struct perf_tool *tool,
673 union perf_event *event,
674 struct perf_sample *sample,
675 struct perf_evsel *evsel,
676 struct machine *machine)
677{
678 int err = 0;
679 struct thread *thread;
680 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
681 tool);
682
683 if (skip_sample(kvm, sample))
684 return 0;
685
686 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
687 if (thread == NULL) {
688 pr_debug("problem processing %d event, skipping it.\n",
689 event->header.type);
690 return -1;
691 }
692
693 if (!handle_kvm_event(kvm, thread, evsel, sample))
694 err = -1;
695
696 thread__put(thread);
697 return err;
698}
699
700static int cpu_isa_config(struct perf_kvm_stat *kvm)
701{
702 char buf[64], *cpuid;
703 int err;
704
705 if (kvm->live) {
706 err = get_cpuid(buf, sizeof(buf));
707 if (err != 0) {
708 pr_err("Failed to look up CPU type\n");
709 return err;
710 }
711 cpuid = buf;
712 } else
713 cpuid = kvm->session->header.env.cpuid;
714
715 if (!cpuid) {
716 pr_err("Failed to look up CPU type\n");
717 return -EINVAL;
718 }
719
720 err = cpu_isa_init(kvm, cpuid);
721 if (err == -ENOTSUP)
722 pr_err("CPU %s is not supported.\n", cpuid);
723
724 return err;
725}
726
727static bool verify_vcpu(int vcpu)
728{
729 if (vcpu != -1 && vcpu < 0) {
730 pr_err("Invalid vcpu:%d.\n", vcpu);
731 return false;
732 }
733
734 return true;
735}
736
737#ifdef HAVE_TIMERFD_SUPPORT
738/* keeping the max events to a modest level to keep
739 * the processing of samples per mmap smooth.
740 */
741#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
742
743static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
744 u64 *mmap_time)
745{
746 struct perf_evlist *evlist = kvm->evlist;
747 union perf_event *event;
748 struct perf_mmap *md;
749 u64 timestamp;
750 s64 n = 0;
751 int err;
752
753 *mmap_time = ULLONG_MAX;
754 md = &evlist->mmap[idx];
755 err = perf_mmap__read_init(md);
756 if (err < 0)
757 return (err == -EAGAIN) ? 0 : -1;
758
759 while ((event = perf_mmap__read_event(md)) != NULL) {
760 err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
761 if (err) {
762 perf_mmap__consume(md);
763 pr_err("Failed to parse sample\n");
764 return -1;
765 }
766
767 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
768 /*
769 * FIXME: Here we can't consume the event, as perf_session__queue_event will
770 * point to it, and it'll get possibly overwritten by the kernel.
771 */
772 perf_mmap__consume(md);
773
774 if (err) {
775 pr_err("Failed to enqueue sample: %d\n", err);
776 return -1;
777 }
778
779 /* save time stamp of our first sample for this mmap */
780 if (n == 0)
781 *mmap_time = timestamp;
782
783 /* limit events per mmap handled all at once */
784 n++;
785 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
786 break;
787 }
788
789 perf_mmap__read_done(md);
790 return n;
791}
792
793static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
794{
795 int i, err, throttled = 0;
796 s64 n, ntotal = 0;
797 u64 flush_time = ULLONG_MAX, mmap_time;
798
799 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
800 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
801 if (n < 0)
802 return -1;
803
804 /* flush time is going to be the minimum of all the individual
805 * mmap times. Essentially, we flush all the samples queued up
806 * from the last pass under our minimal start time -- that leaves
807 * a very small race for samples to come in with a lower timestamp.
808 * The ioctl to return the perf_clock timestamp should close the
809 * race entirely.
810 */
811 if (mmap_time < flush_time)
812 flush_time = mmap_time;
813
814 ntotal += n;
815 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
816 throttled = 1;
817 }
818
819 /* flush queue after each round in which we processed events */
820 if (ntotal) {
821 struct ordered_events *oe = &kvm->session->ordered_events;
822
823 oe->next_flush = flush_time;
824 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
825 if (err) {
826 if (kvm->lost_events)
827 pr_info("\nLost events: %" PRIu64 "\n\n",
828 kvm->lost_events);
829 return err;
830 }
831 }
832
833 return throttled;
834}
835
836static volatile int done;
837
838static void sig_handler(int sig __maybe_unused)
839{
840 done = 1;
841}
842
843static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
844{
845 struct itimerspec new_value;
846 int rc = -1;
847
848 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
849 if (kvm->timerfd < 0) {
850 pr_err("timerfd_create failed\n");
851 goto out;
852 }
853
854 new_value.it_value.tv_sec = kvm->display_time;
855 new_value.it_value.tv_nsec = 0;
856 new_value.it_interval.tv_sec = kvm->display_time;
857 new_value.it_interval.tv_nsec = 0;
858
859 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
860 pr_err("timerfd_settime failed: %d\n", errno);
861 close(kvm->timerfd);
862 goto out;
863 }
864
865 rc = 0;
866out:
867 return rc;
868}
869
870static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
871{
872 uint64_t c;
873 int rc;
874
875 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
876 if (rc < 0) {
877 if (errno == EAGAIN)
878 return 0;
879
880 pr_err("Failed to read timer fd: %d\n", errno);
881 return -1;
882 }
883
884 if (rc != sizeof(uint64_t)) {
885 pr_err("Error reading timer fd - invalid size returned\n");
886 return -1;
887 }
888
889 if (c != 1)
890 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
891
892 /* update display */
893 sort_result(kvm);
894 print_result(kvm);
895
896 /* reset counts */
897 clear_events_cache_stats(kvm->kvm_events_cache);
898 kvm->total_count = 0;
899 kvm->total_time = 0;
900 kvm->lost_events = 0;
901
902 return 0;
903}
904
905static int fd_set_nonblock(int fd)
906{
907 long arg = 0;
908
909 arg = fcntl(fd, F_GETFL);
910 if (arg < 0) {
911 pr_err("Failed to get current flags for fd %d\n", fd);
912 return -1;
913 }
914
915 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
916 pr_err("Failed to set non-block option on fd %d\n", fd);
917 return -1;
918 }
919
920 return 0;
921}
922
923static int perf_kvm__handle_stdin(void)
924{
925 int c;
926
927 c = getc(stdin);
928 if (c == 'q')
929 return 1;
930
931 return 0;
932}
933
934static int kvm_events_live_report(struct perf_kvm_stat *kvm)
935{
936 int nr_stdin, ret, err = -EINVAL;
937 struct termios save;
938
939 /* live flag must be set first */
940 kvm->live = true;
941
942 ret = cpu_isa_config(kvm);
943 if (ret < 0)
944 return ret;
945
946 if (!verify_vcpu(kvm->trace_vcpu) ||
947 !select_key(kvm) ||
948 !register_kvm_events_ops(kvm)) {
949 goto out;
950 }
951
952 set_term_quiet_input(&save);
953 init_kvm_event_record(kvm);
954
955 signal(SIGINT, sig_handler);
956 signal(SIGTERM, sig_handler);
957
958 /* add timer fd */
959 if (perf_kvm__timerfd_create(kvm) < 0) {
960 err = -1;
961 goto out;
962 }
963
964 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
965 goto out;
966
967 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
968 if (nr_stdin < 0)
969 goto out;
970
971 if (fd_set_nonblock(fileno(stdin)) != 0)
972 goto out;
973
974 /* everything is good - enable the events and process */
975 perf_evlist__enable(kvm->evlist);
976
977 while (!done) {
978 struct fdarray *fda = &kvm->evlist->pollfd;
979 int rc;
980
981 rc = perf_kvm__mmap_read(kvm);
982 if (rc < 0)
983 break;
984
985 err = perf_kvm__handle_timerfd(kvm);
986 if (err)
987 goto out;
988
989 if (fda->entries[nr_stdin].revents & POLLIN)
990 done = perf_kvm__handle_stdin();
991
992 if (!rc && !done)
993 err = fdarray__poll(fda, 100);
994 }
995
996 perf_evlist__disable(kvm->evlist);
997
998 if (err == 0) {
999 sort_result(kvm);
1000 print_result(kvm);
1001 }
1002
1003out:
1004 if (kvm->timerfd >= 0)
1005 close(kvm->timerfd);
1006
1007 tcsetattr(0, TCSAFLUSH, &save);
1008 return err;
1009}
1010
1011static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1012{
1013 int err, rc = -1;
1014 struct perf_evsel *pos;
1015 struct perf_evlist *evlist = kvm->evlist;
1016 char sbuf[STRERR_BUFSIZE];
1017
1018 perf_evlist__config(evlist, &kvm->opts, NULL);
1019
1020 /*
1021 * Note: exclude_{guest,host} do not apply here.
1022 * This command processes KVM tracepoints from host only
1023 */
1024 evlist__for_each_entry(evlist, pos) {
1025 struct perf_event_attr *attr = &pos->attr;
1026
1027 /* make sure these *are* set */
1028 perf_evsel__set_sample_bit(pos, TID);
1029 perf_evsel__set_sample_bit(pos, TIME);
1030 perf_evsel__set_sample_bit(pos, CPU);
1031 perf_evsel__set_sample_bit(pos, RAW);
1032 /* make sure these are *not*; want as small a sample as possible */
1033 perf_evsel__reset_sample_bit(pos, PERIOD);
1034 perf_evsel__reset_sample_bit(pos, IP);
1035 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1036 perf_evsel__reset_sample_bit(pos, ADDR);
1037 perf_evsel__reset_sample_bit(pos, READ);
1038 attr->mmap = 0;
1039 attr->comm = 0;
1040 attr->task = 0;
1041
1042 attr->sample_period = 1;
1043
1044 attr->watermark = 0;
1045 attr->wakeup_events = 1000;
1046
1047 /* will enable all once we are ready */
1048 attr->disabled = 1;
1049 }
1050
1051 err = perf_evlist__open(evlist);
1052 if (err < 0) {
1053 printf("Couldn't create the events: %s\n",
1054 str_error_r(errno, sbuf, sizeof(sbuf)));
1055 goto out;
1056 }
1057
1058 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1059 ui__error("Failed to mmap the events: %s\n",
1060 str_error_r(errno, sbuf, sizeof(sbuf)));
1061 perf_evlist__close(evlist);
1062 goto out;
1063 }
1064
1065 rc = 0;
1066
1067out:
1068 return rc;
1069}
1070#endif
1071
1072static int read_events(struct perf_kvm_stat *kvm)
1073{
1074 int ret;
1075
1076 struct perf_tool eops = {
1077 .sample = process_sample_event,
1078 .comm = perf_event__process_comm,
1079 .namespaces = perf_event__process_namespaces,
1080 .ordered_events = true,
1081 };
1082 struct perf_data file = {
1083 .file = {
1084 .path = kvm->file_name,
1085 },
1086 .mode = PERF_DATA_MODE_READ,
1087 .force = kvm->force,
1088 };
1089
1090 kvm->tool = eops;
1091 kvm->session = perf_session__new(&file, false, &kvm->tool);
1092 if (!kvm->session) {
1093 pr_err("Initializing perf session failed\n");
1094 return -1;
1095 }
1096
1097 symbol__init(&kvm->session->header.env);
1098
1099 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1100 ret = -EINVAL;
1101 goto out_delete;
1102 }
1103
1104 /*
1105 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1106 * traced in the old kernel.
1107 */
1108 ret = cpu_isa_config(kvm);
1109 if (ret < 0)
1110 goto out_delete;
1111
1112 ret = perf_session__process_events(kvm->session);
1113
1114out_delete:
1115 perf_session__delete(kvm->session);
1116 return ret;
1117}
1118
1119static int parse_target_str(struct perf_kvm_stat *kvm)
1120{
1121 if (kvm->opts.target.pid) {
1122 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1123 if (kvm->pid_list == NULL) {
1124 pr_err("Error parsing process id string\n");
1125 return -EINVAL;
1126 }
1127 }
1128
1129 return 0;
1130}
1131
1132static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1133{
1134 int ret = -EINVAL;
1135 int vcpu = kvm->trace_vcpu;
1136
1137 if (parse_target_str(kvm) != 0)
1138 goto exit;
1139
1140 if (!verify_vcpu(vcpu))
1141 goto exit;
1142
1143 if (!select_key(kvm))
1144 goto exit;
1145
1146 if (!register_kvm_events_ops(kvm))
1147 goto exit;
1148
1149 init_kvm_event_record(kvm);
1150 setup_pager();
1151
1152 ret = read_events(kvm);
1153 if (ret)
1154 goto exit;
1155
1156 sort_result(kvm);
1157 print_result(kvm);
1158
1159exit:
1160 return ret;
1161}
1162
1163#define STRDUP_FAIL_EXIT(s) \
1164 ({ char *_p; \
1165 _p = strdup(s); \
1166 if (!_p) \
1167 return -ENOMEM; \
1168 _p; \
1169 })
1170
1171int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1172{
1173 return 0;
1174}
1175
1176static int
1177kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1178{
1179 unsigned int rec_argc, i, j, events_tp_size;
1180 const char **rec_argv;
1181 const char * const record_args[] = {
1182 "record",
1183 "-R",
1184 "-m", "1024",
1185 "-c", "1",
1186 };
1187 const char * const kvm_stat_record_usage[] = {
1188 "perf kvm stat record [<options>]",
1189 NULL
1190 };
1191 const char * const *events_tp;
1192 int ret;
1193
1194 events_tp_size = 0;
1195 ret = setup_kvm_events_tp(kvm);
1196 if (ret < 0) {
1197 pr_err("Unable to setup the kvm tracepoints\n");
1198 return ret;
1199 }
1200
1201 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1202 events_tp_size++;
1203
1204 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1205 2 * events_tp_size;
1206 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1207
1208 if (rec_argv == NULL)
1209 return -ENOMEM;
1210
1211 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1212 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1213
1214 for (j = 0; j < events_tp_size; j++) {
1215 rec_argv[i++] = "-e";
1216 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1217 }
1218
1219 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1220 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1221
1222 for (j = 1; j < (unsigned int)argc; j++, i++)
1223 rec_argv[i] = argv[j];
1224
1225 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1226 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1227 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1228
1229 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1230 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1231 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1232 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1233 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1234 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1244
1245 record_usage = kvm_stat_record_usage;
1246 return cmd_record(i, rec_argv);
1247}
1248
1249static int
1250kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1251{
1252 const struct option kvm_events_report_options[] = {
1253 OPT_STRING(0, "event", &kvm->report_event, "report event",
1254 "event for reporting: vmexit, "
1255 "mmio (x86 only), ioport (x86 only)"),
1256 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1257 "vcpu id to report"),
1258 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1259 "key for sorting: sample(sort by samples number)"
1260 " time (sort by avg time)"),
1261 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1262 "analyze events only for given process id(s)"),
1263 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1264 OPT_END()
1265 };
1266
1267 const char * const kvm_events_report_usage[] = {
1268 "perf kvm stat report [<options>]",
1269 NULL
1270 };
1271
1272 if (argc) {
1273 argc = parse_options(argc, argv,
1274 kvm_events_report_options,
1275 kvm_events_report_usage, 0);
1276 if (argc)
1277 usage_with_options(kvm_events_report_usage,
1278 kvm_events_report_options);
1279 }
1280
1281 if (!kvm->opts.target.pid)
1282 kvm->opts.target.system_wide = true;
1283
1284 return kvm_events_report_vcpu(kvm);
1285}
1286
1287#ifdef HAVE_TIMERFD_SUPPORT
1288static struct perf_evlist *kvm_live_event_list(void)
1289{
1290 struct perf_evlist *evlist;
1291 char *tp, *name, *sys;
1292 int err = -1;
1293 const char * const *events_tp;
1294
1295 evlist = perf_evlist__new();
1296 if (evlist == NULL)
1297 return NULL;
1298
1299 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1300
1301 tp = strdup(*events_tp);
1302 if (tp == NULL)
1303 goto out;
1304
1305 /* split tracepoint into subsystem and name */
1306 sys = tp;
1307 name = strchr(tp, ':');
1308 if (name == NULL) {
1309 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1310 *events_tp);
1311 free(tp);
1312 goto out;
1313 }
1314 *name = '\0';
1315 name++;
1316
1317 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1318 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1319 free(tp);
1320 goto out;
1321 }
1322
1323 free(tp);
1324 }
1325
1326 err = 0;
1327
1328out:
1329 if (err) {
1330 perf_evlist__delete(evlist);
1331 evlist = NULL;
1332 }
1333
1334 return evlist;
1335}
1336
1337static int kvm_events_live(struct perf_kvm_stat *kvm,
1338 int argc, const char **argv)
1339{
1340 char errbuf[BUFSIZ];
1341 int err;
1342
1343 const struct option live_options[] = {
1344 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1345 "record events on existing process id"),
1346 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1347 "number of mmap data pages",
1348 perf_evlist__parse_mmap_pages),
1349 OPT_INCR('v', "verbose", &verbose,
1350 "be more verbose (show counter open errors, etc)"),
1351 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1352 "system-wide collection from all CPUs"),
1353 OPT_UINTEGER('d', "display", &kvm->display_time,
1354 "time in seconds between display updates"),
1355 OPT_STRING(0, "event", &kvm->report_event, "report event",
1356 "event for reporting: "
1357 "vmexit, mmio (x86 only), ioport (x86 only)"),
1358 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1359 "vcpu id to report"),
1360 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1361 "key for sorting: sample(sort by samples number)"
1362 " time (sort by avg time)"),
1363 OPT_U64(0, "duration", &kvm->duration,
1364 "show events other than"
1365 " HLT (x86 only) or Wait state (s390 only)"
1366 " that take longer than duration usecs"),
1367 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1368 "per thread proc mmap processing timeout in ms"),
1369 OPT_END()
1370 };
1371 const char * const live_usage[] = {
1372 "perf kvm stat live [<options>]",
1373 NULL
1374 };
1375 struct perf_data data = {
1376 .mode = PERF_DATA_MODE_WRITE,
1377 };
1378
1379
1380 /* event handling */
1381 kvm->tool.sample = process_sample_event;
1382 kvm->tool.comm = perf_event__process_comm;
1383 kvm->tool.exit = perf_event__process_exit;
1384 kvm->tool.fork = perf_event__process_fork;
1385 kvm->tool.lost = process_lost_event;
1386 kvm->tool.namespaces = perf_event__process_namespaces;
1387 kvm->tool.ordered_events = true;
1388 perf_tool__fill_defaults(&kvm->tool);
1389
1390 /* set defaults */
1391 kvm->display_time = 1;
1392 kvm->opts.user_interval = 1;
1393 kvm->opts.mmap_pages = 512;
1394 kvm->opts.target.uses_mmap = false;
1395 kvm->opts.target.uid_str = NULL;
1396 kvm->opts.target.uid = UINT_MAX;
1397 kvm->opts.proc_map_timeout = 500;
1398
1399 symbol__init(NULL);
1400 disable_buildid_cache();
1401
1402 use_browser = 0;
1403
1404 if (argc) {
1405 argc = parse_options(argc, argv, live_options,
1406 live_usage, 0);
1407 if (argc)
1408 usage_with_options(live_usage, live_options);
1409 }
1410
1411 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1412
1413 /*
1414 * target related setups
1415 */
1416 err = target__validate(&kvm->opts.target);
1417 if (err) {
1418 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1419 ui__warning("%s", errbuf);
1420 }
1421
1422 if (target__none(&kvm->opts.target))
1423 kvm->opts.target.system_wide = true;
1424
1425
1426 /*
1427 * generate the event list
1428 */
1429 err = setup_kvm_events_tp(kvm);
1430 if (err < 0) {
1431 pr_err("Unable to setup the kvm tracepoints\n");
1432 return err;
1433 }
1434
1435 kvm->evlist = kvm_live_event_list();
1436 if (kvm->evlist == NULL) {
1437 err = -1;
1438 goto out;
1439 }
1440
1441 symbol_conf.nr_events = kvm->evlist->nr_entries;
1442
1443 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1444 usage_with_options(live_usage, live_options);
1445
1446 /*
1447 * perf session
1448 */
1449 kvm->session = perf_session__new(&data, false, &kvm->tool);
1450 if (kvm->session == NULL) {
1451 err = -1;
1452 goto out;
1453 }
1454 kvm->session->evlist = kvm->evlist;
1455 perf_session__set_id_hdr_size(kvm->session);
1456 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1457 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1458 kvm->evlist->threads, false,
1459 kvm->opts.proc_map_timeout, 1);
1460 err = kvm_live_open_events(kvm);
1461 if (err)
1462 goto out;
1463
1464 err = kvm_events_live_report(kvm);
1465
1466out:
1467 perf_session__delete(kvm->session);
1468 kvm->session = NULL;
1469 perf_evlist__delete(kvm->evlist);
1470
1471 return err;
1472}
1473#endif
1474
1475static void print_kvm_stat_usage(void)
1476{
1477 printf("Usage: perf kvm stat <command>\n\n");
1478
1479 printf("# Available commands:\n");
1480 printf("\trecord: record kvm events\n");
1481 printf("\treport: report statistical data of kvm events\n");
1482 printf("\tlive: live reporting of statistical data of kvm events\n");
1483
1484 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1485}
1486
1487static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1488{
1489 struct perf_kvm_stat kvm = {
1490 .file_name = file_name,
1491
1492 .trace_vcpu = -1,
1493 .report_event = "vmexit",
1494 .sort_key = "sample",
1495
1496 };
1497
1498 if (argc == 1) {
1499 print_kvm_stat_usage();
1500 goto perf_stat;
1501 }
1502
1503 if (!strncmp(argv[1], "rec", 3))
1504 return kvm_events_record(&kvm, argc - 1, argv + 1);
1505
1506 if (!strncmp(argv[1], "rep", 3))
1507 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1508
1509#ifdef HAVE_TIMERFD_SUPPORT
1510 if (!strncmp(argv[1], "live", 4))
1511 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1512#endif
1513
1514perf_stat:
1515 return cmd_stat(argc, argv);
1516}
1517#endif /* HAVE_KVM_STAT_SUPPORT */
1518
1519static int __cmd_record(const char *file_name, int argc, const char **argv)
1520{
1521 int rec_argc, i = 0, j;
1522 const char **rec_argv;
1523
1524 rec_argc = argc + 2;
1525 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1526 rec_argv[i++] = strdup("record");
1527 rec_argv[i++] = strdup("-o");
1528 rec_argv[i++] = strdup(file_name);
1529 for (j = 1; j < argc; j++, i++)
1530 rec_argv[i] = argv[j];
1531
1532 BUG_ON(i != rec_argc);
1533
1534 return cmd_record(i, rec_argv);
1535}
1536
1537static int __cmd_report(const char *file_name, int argc, const char **argv)
1538{
1539 int rec_argc, i = 0, j;
1540 const char **rec_argv;
1541
1542 rec_argc = argc + 2;
1543 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1544 rec_argv[i++] = strdup("report");
1545 rec_argv[i++] = strdup("-i");
1546 rec_argv[i++] = strdup(file_name);
1547 for (j = 1; j < argc; j++, i++)
1548 rec_argv[i] = argv[j];
1549
1550 BUG_ON(i != rec_argc);
1551
1552 return cmd_report(i, rec_argv);
1553}
1554
1555static int
1556__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1557{
1558 int rec_argc, i = 0, j;
1559 const char **rec_argv;
1560
1561 rec_argc = argc + 2;
1562 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1563 rec_argv[i++] = strdup("buildid-list");
1564 rec_argv[i++] = strdup("-i");
1565 rec_argv[i++] = strdup(file_name);
1566 for (j = 1; j < argc; j++, i++)
1567 rec_argv[i] = argv[j];
1568
1569 BUG_ON(i != rec_argc);
1570
1571 return cmd_buildid_list(i, rec_argv);
1572}
1573
1574int cmd_kvm(int argc, const char **argv)
1575{
1576 const char *file_name = NULL;
1577 const struct option kvm_options[] = {
1578 OPT_STRING('i', "input", &file_name, "file",
1579 "Input file name"),
1580 OPT_STRING('o', "output", &file_name, "file",
1581 "Output file name"),
1582 OPT_BOOLEAN(0, "guest", &perf_guest,
1583 "Collect guest os data"),
1584 OPT_BOOLEAN(0, "host", &perf_host,
1585 "Collect host os data"),
1586 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1587 "guest mount directory under which every guest os"
1588 " instance has a subdir"),
1589 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1590 "file", "file saving guest os vmlinux"),
1591 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1592 "file", "file saving guest os /proc/kallsyms"),
1593 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1594 "file", "file saving guest os /proc/modules"),
1595 OPT_INCR('v', "verbose", &verbose,
1596 "be more verbose (show counter open errors, etc)"),
1597 OPT_END()
1598 };
1599
1600 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1601 "buildid-list", "stat", NULL };
1602 const char *kvm_usage[] = { NULL, NULL };
1603
1604 perf_host = 0;
1605 perf_guest = 1;
1606
1607 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1608 PARSE_OPT_STOP_AT_NON_OPTION);
1609 if (!argc)
1610 usage_with_options(kvm_usage, kvm_options);
1611
1612 if (!perf_host)
1613 perf_guest = 1;
1614
1615 if (!file_name) {
1616 file_name = get_filename_for_perf_kvm();
1617
1618 if (!file_name) {
1619 pr_err("Failed to allocate memory for filename\n");
1620 return -ENOMEM;
1621 }
1622 }
1623
1624 if (!strncmp(argv[0], "rec", 3))
1625 return __cmd_record(file_name, argc, argv);
1626 else if (!strncmp(argv[0], "rep", 3))
1627 return __cmd_report(file_name, argc, argv);
1628 else if (!strncmp(argv[0], "diff", 4))
1629 return cmd_diff(argc, argv);
1630 else if (!strncmp(argv[0], "top", 3))
1631 return cmd_top(argc, argv);
1632 else if (!strncmp(argv[0], "buildid-list", 12))
1633 return __cmd_buildid_list(file_name, argc, argv);
1634#ifdef HAVE_KVM_STAT_SUPPORT
1635 else if (!strncmp(argv[0], "stat", 4))
1636 return kvm_cmd_stat(file_name, argc, argv);
1637#endif
1638 else
1639 usage_with_options(kvm_usage, kvm_options);
1640
1641 return 0;
1642}
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}