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accel/ivpu: Enable HWS by default on all platforms
[drm/drm-misc.git] / tools / perf / builtin-kvm.c
blob274568d712d12f9ada0ce141518b2eb526cb9537
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) \
57 static 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) \
69 GET_EVENT_KEY(func, field) \
70 static 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
77 COMPARE_EVENT_KEY(time, time);
78 COMPARE_EVENT_KEY(max, stats.max);
79 COMPARE_EVENT_KEY(min, stats.min);
80 COMPARE_EVENT_KEY(count, stats.n);
81 COMPARE_EVENT_KEY(mean, stats.mean);
82
83 struct kvm_hists {
84 struct hists hists;
85 struct perf_hpp_list list;
86 };
87
88 struct 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
98 struct kvm_fmt {
99 struct perf_hpp_fmt fmt;
100 struct kvm_dimension *dim;
101 };
102
103 static struct kvm_hists kvm_hists;
104
105 static 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
113 static int fmt_width(struct perf_hpp_fmt *fmt,
114 struct perf_hpp *hpp __maybe_unused,
115 struct hists *hists __maybe_unused);
116
117 static 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
125 static 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) \
134 static 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
150 EV_METRIC_CMP(time)
151 EV_METRIC_CMP(count)
152 EV_METRIC_CMP(max)
153 EV_METRIC_CMP(min)
154 EV_METRIC_CMP(mean)
155
156 #define EV_METRIC_ENTRY(metric) \
157 static 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
171 EV_METRIC_ENTRY(time)
172 EV_METRIC_ENTRY(count)
173 EV_METRIC_ENTRY(max)
174 EV_METRIC_ENTRY(min)
175
176 static 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
184 static 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
192 static 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
200 static 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
208 static 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
221 static 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
235 static double percent(u64 st, u64 tot)
236 {
237 return tot ? 100. * (double) st / (double) tot : 0;
238 }
239
240 #define EV_METRIC_PERCENT(metric) \
241 static 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
253 EV_METRIC_PERCENT(time)
254 EV_METRIC_PERCENT(count)
255
256 static 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
268 static int64_t
269 ev_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
281 static 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
289 static 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
301 static int64_t
302 ev_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
314 static 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
322 static 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
334 static 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
344 static 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
358 static 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
366 static 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
374 static 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
386 static 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
417 static 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
430 static 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
443 static 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
474 static 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);
494 out:
495 free(output);
496 free(sort);
497 return ret;
498 }
499
500 static 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
508 static 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 }
513 static void print_result(struct perf_kvm_stat *kvm);
514
515 #ifdef HAVE_SLANG_SUPPORT
516 static 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
532 static 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
540 static struct hist_browser*
541 perf_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
551 static 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
577 out:
578 hist_browser__delete(browser);
579 return 0;
580 }
581
582 static 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
592 static 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
602 static 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
618 void 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
626 bool kvm_exit_event(struct evsel *evsel)
627 {
628 return evsel__name_is(evsel, kvm_exit_trace);
629 }
630
631 bool 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
642 bool kvm_entry_event(struct evsel *evsel)
643 {
644 return evsel__name_is(evsel, kvm_entry_trace);
645 }
646
647 bool 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
654 static 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
669 void 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
679 static 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
693 struct vcpu_event_record {
694 int vcpu_id;
695 u64 start_time;
696 struct kvm_event *last_event;
697 };
698
699 #ifdef HAVE_TIMERFD_SUPPORT
700 static 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
730 static 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
755 static 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
768 static 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
776 static struct hist_entry_ops kvm_ev_entry_ops = {
777 .new = kvm_he_zalloc,
778 .free = kvm_he_free,
779 };
780
781 static 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
815 static 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
830 static void
831 kvm_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
837 static 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
848 static 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
868 static 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
890 static 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
905 static 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
916 static 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
977 static
978 struct 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
999 static 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
1029 static 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
1044 static bool event_is_valid(struct kvm_event *event, int vcpu)
1045 {
1046 return !!get_event_count(event, vcpu);
1047 }
1048
1049 static 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
1063 static 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
1076 static 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
1095 static 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, &ltime)) {
1103 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
1104 pr_info("%s.%06ld", date, tv.tv_usec);
1105 } else
1106 pr_info("00:00:00.000000");
1107
1108 return;
1109 }
1110
1111 static 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)
1169 static 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
1181 static 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
1190 static 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
1223 static 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
1253 static 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
1269 static 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, &timestamp);
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
1319 static 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
1362 static volatile int done;
1363
1364 static void sig_handler(int sig __maybe_unused)
1365 {
1366 done = 1;
1367 }
1368
1369 static 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;
1392 out:
1393 return rc;
1394 }
1395
1396 static 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
1434 static 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
1452 static 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
1463 static 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
1533 out:
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
1543 static 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
1599 out:
1600 return rc;
1601 }
1602 #endif
1603
1604 static 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
1642 out_delete:
1643 perf_session__delete(kvm->session);
1644 return ret;
1645 }
1646
1647 static 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
1660 static 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
1695 exit:
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
1708 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1709 {
1710 return 0;
1711 }
1712
1713 static int
1714 kvm_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
1786 static int
1787 kvm_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)
1830 static 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
1870 out:
1871 if (err) {
1872 evlist__delete(evlist);
1873 evlist = NULL;
1874 }
1875
1876 return evlist;
1877 }
1878
1879 static 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
2002 out:
2003 perf_session__delete(kvm->session);
2004 kvm->session = NULL;
2005 evlist__delete(kvm->evlist);
2006
2007 return err;
2008 }
2009 #endif
2010
2011 static 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
2023 static 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
2050 perf_stat:
2051 return cmd_stat(argc, argv);
2052 }
2053 #endif /* HAVE_KVM_STAT_SUPPORT */
2054
2055 int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
2056 const char **argv __maybe_unused)
2057 {
2058 return 0;
2059 }
2060
2061 static 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
2083 static 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
2101 static 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
2120 int 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 }
Kernel DRM miscellaneous fixes and cross-tree changes