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x86/mm/kcore: Add vsyscall page to /proc/kcore conditionally
[linux-2.6/btrfs-unstable.git] / tools / perf / builtin-kvm.c
blob55d919dc5bc632b4a967dde8a5dbfdacf5da3f63
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
43 static 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
60 void 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
68 bool kvm_exit_event(struct perf_evsel *evsel)
69 {
70 return !strcmp(evsel->name, kvm_exit_trace);
71 }
72
73 bool 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
84 bool kvm_entry_event(struct perf_evsel *evsel)
85 {
86 return !strcmp(evsel->name, kvm_entry_trace);
87 }
88
89 bool 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
96 static 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
111 void 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
121 static 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
135 struct vcpu_event_record {
136 int vcpu_id;
137 u64 start_time;
138 struct kvm_event *last_event;
139 };
140
141
142 static 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
151 static 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
174 static int kvm_events_hash_fn(u64 key)
175 {
176 return key & (EVENTS_CACHE_SIZE - 1);
177 }
178
179 static 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
204 static 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
219 static 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
241 static 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
255 static void
256 kvm_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
262 static 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
273 static 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
288 static 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
310 static 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
325 static 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
336 static 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
397 static
398 struct 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
420 static 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) \
451 static 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) \
463 GET_EVENT_KEY(func, field) \
464 static 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
471 GET_EVENT_KEY(time, time);
472 COMPARE_EVENT_KEY(count, stats.n);
473 COMPARE_EVENT_KEY(mean, stats.mean);
474 GET_EVENT_KEY(max, stats.max);
475 GET_EVENT_KEY(min, stats.min);
476
477 #define DEF_SORT_NAME_KEY(name, compare_key) \
478 { #name, compare_kvm_event_ ## compare_key }
479
480 static struct kvm_event_key keys[] = {
481 DEF_SORT_NAME_KEY(sample, count),
482 DEF_SORT_NAME_KEY(time, mean),
483 { NULL, NULL }
484 };
485
486 static 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
501 static 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
522 static void
523 update_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
531 static bool event_is_valid(struct kvm_event *event, int vcpu)
532 {
533 return !!get_event_count(event, vcpu);
534 }
535
536 static 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 */
554 static 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
565 static 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
584 static 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, &ltime)) {
592 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
593 pr_info("%s.%06ld", date, tv.tv_usec);
594 } else
595 pr_info("00:00:00.000000");
596
597 return;
598 }
599
600 static 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
651 static 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
663 static 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
672 static 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
700 static 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
727 static 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
743 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
744 u64 *mmap_time)
745 {
746 union perf_event *event;
747 u64 timestamp;
748 s64 n = 0;
749 int err;
750
751 *mmap_time = ULLONG_MAX;
752 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
753 err = perf_evlist__parse_sample_timestamp(kvm->evlist, event, &timestamp);
754 if (err) {
755 perf_evlist__mmap_consume(kvm->evlist, idx);
756 pr_err("Failed to parse sample\n");
757 return -1;
758 }
759
760 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
761 /*
762 * FIXME: Here we can't consume the event, as perf_session__queue_event will
763 * point to it, and it'll get possibly overwritten by the kernel.
764 */
765 perf_evlist__mmap_consume(kvm->evlist, idx);
766
767 if (err) {
768 pr_err("Failed to enqueue sample: %d\n", err);
769 return -1;
770 }
771
772 /* save time stamp of our first sample for this mmap */
773 if (n == 0)
774 *mmap_time = timestamp;
775
776 /* limit events per mmap handled all at once */
777 n++;
778 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
779 break;
780 }
781
782 return n;
783 }
784
785 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
786 {
787 int i, err, throttled = 0;
788 s64 n, ntotal = 0;
789 u64 flush_time = ULLONG_MAX, mmap_time;
790
791 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
792 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
793 if (n < 0)
794 return -1;
795
796 /* flush time is going to be the minimum of all the individual
797 * mmap times. Essentially, we flush all the samples queued up
798 * from the last pass under our minimal start time -- that leaves
799 * a very small race for samples to come in with a lower timestamp.
800 * The ioctl to return the perf_clock timestamp should close the
801 * race entirely.
802 */
803 if (mmap_time < flush_time)
804 flush_time = mmap_time;
805
806 ntotal += n;
807 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
808 throttled = 1;
809 }
810
811 /* flush queue after each round in which we processed events */
812 if (ntotal) {
813 struct ordered_events *oe = &kvm->session->ordered_events;
814
815 oe->next_flush = flush_time;
816 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
817 if (err) {
818 if (kvm->lost_events)
819 pr_info("\nLost events: %" PRIu64 "\n\n",
820 kvm->lost_events);
821 return err;
822 }
823 }
824
825 return throttled;
826 }
827
828 static volatile int done;
829
830 static void sig_handler(int sig __maybe_unused)
831 {
832 done = 1;
833 }
834
835 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
836 {
837 struct itimerspec new_value;
838 int rc = -1;
839
840 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
841 if (kvm->timerfd < 0) {
842 pr_err("timerfd_create failed\n");
843 goto out;
844 }
845
846 new_value.it_value.tv_sec = kvm->display_time;
847 new_value.it_value.tv_nsec = 0;
848 new_value.it_interval.tv_sec = kvm->display_time;
849 new_value.it_interval.tv_nsec = 0;
850
851 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
852 pr_err("timerfd_settime failed: %d\n", errno);
853 close(kvm->timerfd);
854 goto out;
855 }
856
857 rc = 0;
858 out:
859 return rc;
860 }
861
862 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
863 {
864 uint64_t c;
865 int rc;
866
867 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
868 if (rc < 0) {
869 if (errno == EAGAIN)
870 return 0;
871
872 pr_err("Failed to read timer fd: %d\n", errno);
873 return -1;
874 }
875
876 if (rc != sizeof(uint64_t)) {
877 pr_err("Error reading timer fd - invalid size returned\n");
878 return -1;
879 }
880
881 if (c != 1)
882 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
883
884 /* update display */
885 sort_result(kvm);
886 print_result(kvm);
887
888 /* reset counts */
889 clear_events_cache_stats(kvm->kvm_events_cache);
890 kvm->total_count = 0;
891 kvm->total_time = 0;
892 kvm->lost_events = 0;
893
894 return 0;
895 }
896
897 static int fd_set_nonblock(int fd)
898 {
899 long arg = 0;
900
901 arg = fcntl(fd, F_GETFL);
902 if (arg < 0) {
903 pr_err("Failed to get current flags for fd %d\n", fd);
904 return -1;
905 }
906
907 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
908 pr_err("Failed to set non-block option on fd %d\n", fd);
909 return -1;
910 }
911
912 return 0;
913 }
914
915 static int perf_kvm__handle_stdin(void)
916 {
917 int c;
918
919 c = getc(stdin);
920 if (c == 'q')
921 return 1;
922
923 return 0;
924 }
925
926 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
927 {
928 int nr_stdin, ret, err = -EINVAL;
929 struct termios save;
930
931 /* live flag must be set first */
932 kvm->live = true;
933
934 ret = cpu_isa_config(kvm);
935 if (ret < 0)
936 return ret;
937
938 if (!verify_vcpu(kvm->trace_vcpu) ||
939 !select_key(kvm) ||
940 !register_kvm_events_ops(kvm)) {
941 goto out;
942 }
943
944 set_term_quiet_input(&save);
945 init_kvm_event_record(kvm);
946
947 signal(SIGINT, sig_handler);
948 signal(SIGTERM, sig_handler);
949
950 /* add timer fd */
951 if (perf_kvm__timerfd_create(kvm) < 0) {
952 err = -1;
953 goto out;
954 }
955
956 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
957 goto out;
958
959 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
960 if (nr_stdin < 0)
961 goto out;
962
963 if (fd_set_nonblock(fileno(stdin)) != 0)
964 goto out;
965
966 /* everything is good - enable the events and process */
967 perf_evlist__enable(kvm->evlist);
968
969 while (!done) {
970 struct fdarray *fda = &kvm->evlist->pollfd;
971 int rc;
972
973 rc = perf_kvm__mmap_read(kvm);
974 if (rc < 0)
975 break;
976
977 err = perf_kvm__handle_timerfd(kvm);
978 if (err)
979 goto out;
980
981 if (fda->entries[nr_stdin].revents & POLLIN)
982 done = perf_kvm__handle_stdin();
983
984 if (!rc && !done)
985 err = fdarray__poll(fda, 100);
986 }
987
988 perf_evlist__disable(kvm->evlist);
989
990 if (err == 0) {
991 sort_result(kvm);
992 print_result(kvm);
993 }
994
995 out:
996 if (kvm->timerfd >= 0)
997 close(kvm->timerfd);
998
999 tcsetattr(0, TCSAFLUSH, &save);
1000 return err;
1001 }
1002
1003 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1004 {
1005 int err, rc = -1;
1006 struct perf_evsel *pos;
1007 struct perf_evlist *evlist = kvm->evlist;
1008 char sbuf[STRERR_BUFSIZE];
1009
1010 perf_evlist__config(evlist, &kvm->opts, NULL);
1011
1012 /*
1013 * Note: exclude_{guest,host} do not apply here.
1014 * This command processes KVM tracepoints from host only
1015 */
1016 evlist__for_each_entry(evlist, pos) {
1017 struct perf_event_attr *attr = &pos->attr;
1018
1019 /* make sure these *are* set */
1020 perf_evsel__set_sample_bit(pos, TID);
1021 perf_evsel__set_sample_bit(pos, TIME);
1022 perf_evsel__set_sample_bit(pos, CPU);
1023 perf_evsel__set_sample_bit(pos, RAW);
1024 /* make sure these are *not*; want as small a sample as possible */
1025 perf_evsel__reset_sample_bit(pos, PERIOD);
1026 perf_evsel__reset_sample_bit(pos, IP);
1027 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1028 perf_evsel__reset_sample_bit(pos, ADDR);
1029 perf_evsel__reset_sample_bit(pos, READ);
1030 attr->mmap = 0;
1031 attr->comm = 0;
1032 attr->task = 0;
1033
1034 attr->sample_period = 1;
1035
1036 attr->watermark = 0;
1037 attr->wakeup_events = 1000;
1038
1039 /* will enable all once we are ready */
1040 attr->disabled = 1;
1041 }
1042
1043 err = perf_evlist__open(evlist);
1044 if (err < 0) {
1045 printf("Couldn't create the events: %s\n",
1046 str_error_r(errno, sbuf, sizeof(sbuf)));
1047 goto out;
1048 }
1049
1050 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1051 ui__error("Failed to mmap the events: %s\n",
1052 str_error_r(errno, sbuf, sizeof(sbuf)));
1053 perf_evlist__close(evlist);
1054 goto out;
1055 }
1056
1057 rc = 0;
1058
1059 out:
1060 return rc;
1061 }
1062 #endif
1063
1064 static int read_events(struct perf_kvm_stat *kvm)
1065 {
1066 int ret;
1067
1068 struct perf_tool eops = {
1069 .sample = process_sample_event,
1070 .comm = perf_event__process_comm,
1071 .namespaces = perf_event__process_namespaces,
1072 .ordered_events = true,
1073 };
1074 struct perf_data file = {
1075 .file = {
1076 .path = kvm->file_name,
1077 },
1078 .mode = PERF_DATA_MODE_READ,
1079 .force = kvm->force,
1080 };
1081
1082 kvm->tool = eops;
1083 kvm->session = perf_session__new(&file, false, &kvm->tool);
1084 if (!kvm->session) {
1085 pr_err("Initializing perf session failed\n");
1086 return -1;
1087 }
1088
1089 symbol__init(&kvm->session->header.env);
1090
1091 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1092 ret = -EINVAL;
1093 goto out_delete;
1094 }
1095
1096 /*
1097 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1098 * traced in the old kernel.
1099 */
1100 ret = cpu_isa_config(kvm);
1101 if (ret < 0)
1102 goto out_delete;
1103
1104 ret = perf_session__process_events(kvm->session);
1105
1106 out_delete:
1107 perf_session__delete(kvm->session);
1108 return ret;
1109 }
1110
1111 static int parse_target_str(struct perf_kvm_stat *kvm)
1112 {
1113 if (kvm->opts.target.pid) {
1114 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1115 if (kvm->pid_list == NULL) {
1116 pr_err("Error parsing process id string\n");
1117 return -EINVAL;
1118 }
1119 }
1120
1121 return 0;
1122 }
1123
1124 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1125 {
1126 int ret = -EINVAL;
1127 int vcpu = kvm->trace_vcpu;
1128
1129 if (parse_target_str(kvm) != 0)
1130 goto exit;
1131
1132 if (!verify_vcpu(vcpu))
1133 goto exit;
1134
1135 if (!select_key(kvm))
1136 goto exit;
1137
1138 if (!register_kvm_events_ops(kvm))
1139 goto exit;
1140
1141 init_kvm_event_record(kvm);
1142 setup_pager();
1143
1144 ret = read_events(kvm);
1145 if (ret)
1146 goto exit;
1147
1148 sort_result(kvm);
1149 print_result(kvm);
1150
1151 exit:
1152 return ret;
1153 }
1154
1155 #define STRDUP_FAIL_EXIT(s) \
1156 ({ char *_p; \
1157 _p = strdup(s); \
1158 if (!_p) \
1159 return -ENOMEM; \
1160 _p; \
1161 })
1162
1163 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1164 {
1165 return 0;
1166 }
1167
1168 static int
1169 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1170 {
1171 unsigned int rec_argc, i, j, events_tp_size;
1172 const char **rec_argv;
1173 const char * const record_args[] = {
1174 "record",
1175 "-R",
1176 "-m", "1024",
1177 "-c", "1",
1178 };
1179 const char * const kvm_stat_record_usage[] = {
1180 "perf kvm stat record [<options>]",
1181 NULL
1182 };
1183 const char * const *events_tp;
1184 int ret;
1185
1186 events_tp_size = 0;
1187 ret = setup_kvm_events_tp(kvm);
1188 if (ret < 0) {
1189 pr_err("Unable to setup the kvm tracepoints\n");
1190 return ret;
1191 }
1192
1193 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1194 events_tp_size++;
1195
1196 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1197 2 * events_tp_size;
1198 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1199
1200 if (rec_argv == NULL)
1201 return -ENOMEM;
1202
1203 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1204 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1205
1206 for (j = 0; j < events_tp_size; j++) {
1207 rec_argv[i++] = "-e";
1208 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1209 }
1210
1211 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1212 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1213
1214 for (j = 1; j < (unsigned int)argc; j++, i++)
1215 rec_argv[i] = argv[j];
1216
1217 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1218 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1219 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1220
1221 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1222 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1223 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1224 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1225 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1226 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1227 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1228 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1229 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1230 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1231 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1232 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1233 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1234 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1236
1237 record_usage = kvm_stat_record_usage;
1238 return cmd_record(i, rec_argv);
1239 }
1240
1241 static int
1242 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1243 {
1244 const struct option kvm_events_report_options[] = {
1245 OPT_STRING(0, "event", &kvm->report_event, "report event",
1246 "event for reporting: vmexit, "
1247 "mmio (x86 only), ioport (x86 only)"),
1248 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1249 "vcpu id to report"),
1250 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1251 "key for sorting: sample(sort by samples number)"
1252 " time (sort by avg time)"),
1253 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1254 "analyze events only for given process id(s)"),
1255 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1256 OPT_END()
1257 };
1258
1259 const char * const kvm_events_report_usage[] = {
1260 "perf kvm stat report [<options>]",
1261 NULL
1262 };
1263
1264 if (argc) {
1265 argc = parse_options(argc, argv,
1266 kvm_events_report_options,
1267 kvm_events_report_usage, 0);
1268 if (argc)
1269 usage_with_options(kvm_events_report_usage,
1270 kvm_events_report_options);
1271 }
1272
1273 if (!kvm->opts.target.pid)
1274 kvm->opts.target.system_wide = true;
1275
1276 return kvm_events_report_vcpu(kvm);
1277 }
1278
1279 #ifdef HAVE_TIMERFD_SUPPORT
1280 static struct perf_evlist *kvm_live_event_list(void)
1281 {
1282 struct perf_evlist *evlist;
1283 char *tp, *name, *sys;
1284 int err = -1;
1285 const char * const *events_tp;
1286
1287 evlist = perf_evlist__new();
1288 if (evlist == NULL)
1289 return NULL;
1290
1291 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1292
1293 tp = strdup(*events_tp);
1294 if (tp == NULL)
1295 goto out;
1296
1297 /* split tracepoint into subsystem and name */
1298 sys = tp;
1299 name = strchr(tp, ':');
1300 if (name == NULL) {
1301 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1302 *events_tp);
1303 free(tp);
1304 goto out;
1305 }
1306 *name = '\0';
1307 name++;
1308
1309 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1310 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1311 free(tp);
1312 goto out;
1313 }
1314
1315 free(tp);
1316 }
1317
1318 err = 0;
1319
1320 out:
1321 if (err) {
1322 perf_evlist__delete(evlist);
1323 evlist = NULL;
1324 }
1325
1326 return evlist;
1327 }
1328
1329 static int kvm_events_live(struct perf_kvm_stat *kvm,
1330 int argc, const char **argv)
1331 {
1332 char errbuf[BUFSIZ];
1333 int err;
1334
1335 const struct option live_options[] = {
1336 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1337 "record events on existing process id"),
1338 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1339 "number of mmap data pages",
1340 perf_evlist__parse_mmap_pages),
1341 OPT_INCR('v', "verbose", &verbose,
1342 "be more verbose (show counter open errors, etc)"),
1343 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1344 "system-wide collection from all CPUs"),
1345 OPT_UINTEGER('d', "display", &kvm->display_time,
1346 "time in seconds between display updates"),
1347 OPT_STRING(0, "event", &kvm->report_event, "report event",
1348 "event for reporting: "
1349 "vmexit, mmio (x86 only), ioport (x86 only)"),
1350 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1351 "vcpu id to report"),
1352 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1353 "key for sorting: sample(sort by samples number)"
1354 " time (sort by avg time)"),
1355 OPT_U64(0, "duration", &kvm->duration,
1356 "show events other than"
1357 " HLT (x86 only) or Wait state (s390 only)"
1358 " that take longer than duration usecs"),
1359 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1360 "per thread proc mmap processing timeout in ms"),
1361 OPT_END()
1362 };
1363 const char * const live_usage[] = {
1364 "perf kvm stat live [<options>]",
1365 NULL
1366 };
1367 struct perf_data data = {
1368 .mode = PERF_DATA_MODE_WRITE,
1369 };
1370
1371
1372 /* event handling */
1373 kvm->tool.sample = process_sample_event;
1374 kvm->tool.comm = perf_event__process_comm;
1375 kvm->tool.exit = perf_event__process_exit;
1376 kvm->tool.fork = perf_event__process_fork;
1377 kvm->tool.lost = process_lost_event;
1378 kvm->tool.namespaces = perf_event__process_namespaces;
1379 kvm->tool.ordered_events = true;
1380 perf_tool__fill_defaults(&kvm->tool);
1381
1382 /* set defaults */
1383 kvm->display_time = 1;
1384 kvm->opts.user_interval = 1;
1385 kvm->opts.mmap_pages = 512;
1386 kvm->opts.target.uses_mmap = false;
1387 kvm->opts.target.uid_str = NULL;
1388 kvm->opts.target.uid = UINT_MAX;
1389 kvm->opts.proc_map_timeout = 500;
1390
1391 symbol__init(NULL);
1392 disable_buildid_cache();
1393
1394 use_browser = 0;
1395
1396 if (argc) {
1397 argc = parse_options(argc, argv, live_options,
1398 live_usage, 0);
1399 if (argc)
1400 usage_with_options(live_usage, live_options);
1401 }
1402
1403 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1404
1405 /*
1406 * target related setups
1407 */
1408 err = target__validate(&kvm->opts.target);
1409 if (err) {
1410 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1411 ui__warning("%s", errbuf);
1412 }
1413
1414 if (target__none(&kvm->opts.target))
1415 kvm->opts.target.system_wide = true;
1416
1417
1418 /*
1419 * generate the event list
1420 */
1421 err = setup_kvm_events_tp(kvm);
1422 if (err < 0) {
1423 pr_err("Unable to setup the kvm tracepoints\n");
1424 return err;
1425 }
1426
1427 kvm->evlist = kvm_live_event_list();
1428 if (kvm->evlist == NULL) {
1429 err = -1;
1430 goto out;
1431 }
1432
1433 symbol_conf.nr_events = kvm->evlist->nr_entries;
1434
1435 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1436 usage_with_options(live_usage, live_options);
1437
1438 /*
1439 * perf session
1440 */
1441 kvm->session = perf_session__new(&data, false, &kvm->tool);
1442 if (kvm->session == NULL) {
1443 err = -1;
1444 goto out;
1445 }
1446 kvm->session->evlist = kvm->evlist;
1447 perf_session__set_id_hdr_size(kvm->session);
1448 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1449 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1450 kvm->evlist->threads, false,
1451 kvm->opts.proc_map_timeout, 1);
1452 err = kvm_live_open_events(kvm);
1453 if (err)
1454 goto out;
1455
1456 err = kvm_events_live_report(kvm);
1457
1458 out:
1459 perf_session__delete(kvm->session);
1460 kvm->session = NULL;
1461 perf_evlist__delete(kvm->evlist);
1462
1463 return err;
1464 }
1465 #endif
1466
1467 static void print_kvm_stat_usage(void)
1468 {
1469 printf("Usage: perf kvm stat <command>\n\n");
1470
1471 printf("# Available commands:\n");
1472 printf("\trecord: record kvm events\n");
1473 printf("\treport: report statistical data of kvm events\n");
1474 printf("\tlive: live reporting of statistical data of kvm events\n");
1475
1476 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1477 }
1478
1479 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1480 {
1481 struct perf_kvm_stat kvm = {
1482 .file_name = file_name,
1483
1484 .trace_vcpu = -1,
1485 .report_event = "vmexit",
1486 .sort_key = "sample",
1487
1488 };
1489
1490 if (argc == 1) {
1491 print_kvm_stat_usage();
1492 goto perf_stat;
1493 }
1494
1495 if (!strncmp(argv[1], "rec", 3))
1496 return kvm_events_record(&kvm, argc - 1, argv + 1);
1497
1498 if (!strncmp(argv[1], "rep", 3))
1499 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1500
1501 #ifdef HAVE_TIMERFD_SUPPORT
1502 if (!strncmp(argv[1], "live", 4))
1503 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1504 #endif
1505
1506 perf_stat:
1507 return cmd_stat(argc, argv);
1508 }
1509 #endif /* HAVE_KVM_STAT_SUPPORT */
1510
1511 static int __cmd_record(const char *file_name, int argc, const char **argv)
1512 {
1513 int rec_argc, i = 0, j;
1514 const char **rec_argv;
1515
1516 rec_argc = argc + 2;
1517 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1518 rec_argv[i++] = strdup("record");
1519 rec_argv[i++] = strdup("-o");
1520 rec_argv[i++] = strdup(file_name);
1521 for (j = 1; j < argc; j++, i++)
1522 rec_argv[i] = argv[j];
1523
1524 BUG_ON(i != rec_argc);
1525
1526 return cmd_record(i, rec_argv);
1527 }
1528
1529 static int __cmd_report(const char *file_name, int argc, const char **argv)
1530 {
1531 int rec_argc, i = 0, j;
1532 const char **rec_argv;
1533
1534 rec_argc = argc + 2;
1535 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1536 rec_argv[i++] = strdup("report");
1537 rec_argv[i++] = strdup("-i");
1538 rec_argv[i++] = strdup(file_name);
1539 for (j = 1; j < argc; j++, i++)
1540 rec_argv[i] = argv[j];
1541
1542 BUG_ON(i != rec_argc);
1543
1544 return cmd_report(i, rec_argv);
1545 }
1546
1547 static int
1548 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1549 {
1550 int rec_argc, i = 0, j;
1551 const char **rec_argv;
1552
1553 rec_argc = argc + 2;
1554 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1555 rec_argv[i++] = strdup("buildid-list");
1556 rec_argv[i++] = strdup("-i");
1557 rec_argv[i++] = strdup(file_name);
1558 for (j = 1; j < argc; j++, i++)
1559 rec_argv[i] = argv[j];
1560
1561 BUG_ON(i != rec_argc);
1562
1563 return cmd_buildid_list(i, rec_argv);
1564 }
1565
1566 int cmd_kvm(int argc, const char **argv)
1567 {
1568 const char *file_name = NULL;
1569 const struct option kvm_options[] = {
1570 OPT_STRING('i', "input", &file_name, "file",
1571 "Input file name"),
1572 OPT_STRING('o', "output", &file_name, "file",
1573 "Output file name"),
1574 OPT_BOOLEAN(0, "guest", &perf_guest,
1575 "Collect guest os data"),
1576 OPT_BOOLEAN(0, "host", &perf_host,
1577 "Collect host os data"),
1578 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1579 "guest mount directory under which every guest os"
1580 " instance has a subdir"),
1581 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1582 "file", "file saving guest os vmlinux"),
1583 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1584 "file", "file saving guest os /proc/kallsyms"),
1585 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1586 "file", "file saving guest os /proc/modules"),
1587 OPT_INCR('v', "verbose", &verbose,
1588 "be more verbose (show counter open errors, etc)"),
1589 OPT_END()
1590 };
1591
1592 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1593 "buildid-list", "stat", NULL };
1594 const char *kvm_usage[] = { NULL, NULL };
1595
1596 perf_host = 0;
1597 perf_guest = 1;
1598
1599 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1600 PARSE_OPT_STOP_AT_NON_OPTION);
1601 if (!argc)
1602 usage_with_options(kvm_usage, kvm_options);
1603
1604 if (!perf_host)
1605 perf_guest = 1;
1606
1607 if (!file_name) {
1608 file_name = get_filename_for_perf_kvm();
1609
1610 if (!file_name) {
1611 pr_err("Failed to allocate memory for filename\n");
1612 return -ENOMEM;
1613 }
1614 }
1615
1616 if (!strncmp(argv[0], "rec", 3))
1617 return __cmd_record(file_name, argc, argv);
1618 else if (!strncmp(argv[0], "rep", 3))
1619 return __cmd_report(file_name, argc, argv);
1620 else if (!strncmp(argv[0], "diff", 4))
1621 return cmd_diff(argc, argv);
1622 else if (!strncmp(argv[0], "top", 3))
1623 return cmd_top(argc, argv);
1624 else if (!strncmp(argv[0], "buildid-list", 12))
1625 return __cmd_buildid_list(file_name, argc, argv);
1626 #ifdef HAVE_KVM_STAT_SUPPORT
1627 else if (!strncmp(argv[0], "stat", 4))
1628 return kvm_cmd_stat(file_name, argc, argv);
1629 #endif
1630 else
1631 usage_with_options(kvm_usage, kvm_options);
1632
1633 return 0;
1634 }
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