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