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TOMOYO Linux Cross Reference
Linux/tools/perf/builtin-kvm.c

Version: ~ [ linux-5.3-rc5 ] ~ [ linux-5.2.9 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.67 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.139 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.189 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.189 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.72 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

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