tools/perf/builtin-kvm.c

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