tools/perf/builtin-kvm.c

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