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 <subcmd/parse-options.h>
  14#include "util/trace-event.h"
 
  15#include "util/debug.h"
  16#include "util/tool.h"
  17#include "util/stat.h"
  18#include "util/top.h"
  19#include "util/data.h"
  20#include "util/ordered-events.h"
  21
  22#include <sys/prctl.h>
  23#ifdef HAVE_TIMERFD_SUPPORT
  24#include <sys/timerfd.h>
  25#endif
  26
  27#include <termios.h>
  28#include <semaphore.h>
  29#include <pthread.h>
  30#include <math.h>
  31
  32#ifdef HAVE_KVM_STAT_SUPPORT
  33#include "util/kvm-stat.h"
  34
  35void exit_event_get_key(struct perf_evsel *evsel,
  36			struct perf_sample *sample,
  37			struct event_key *key)
  38{
  39	key->info = 0;
  40	key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
  41}
  42
  43bool kvm_exit_event(struct perf_evsel *evsel)
  44{
  45	return !strcmp(evsel->name, kvm_exit_trace);
  46}
  47
  48bool exit_event_begin(struct perf_evsel *evsel,
  49		      struct perf_sample *sample, struct event_key *key)
  50{
  51	if (kvm_exit_event(evsel)) {
  52		exit_event_get_key(evsel, sample, key);
  53		return true;
  54	}
  55
  56	return false;
  57}
  58
  59bool kvm_entry_event(struct perf_evsel *evsel)
  60{
  61	return !strcmp(evsel->name, kvm_entry_trace);
  62}
  63
  64bool exit_event_end(struct perf_evsel *evsel,
  65		    struct perf_sample *sample __maybe_unused,
  66		    struct event_key *key __maybe_unused)
  67{
  68	return kvm_entry_event(evsel);
  69}
  70
  71static const char *get_exit_reason(struct perf_kvm_stat *kvm,
  72				   struct exit_reasons_table *tbl,
  73				   u64 exit_code)
  74{
  75	while (tbl->reason != NULL) {
  76		if (tbl->exit_code == exit_code)
  77			return tbl->reason;
  78		tbl++;
  79	}
  80
  81	pr_err("unknown kvm exit code:%lld on %s\n",
  82		(unsigned long long)exit_code, kvm->exit_reasons_isa);
  83	return "UNKNOWN";
  84}
  85
  86void exit_event_decode_key(struct perf_kvm_stat *kvm,
  87			   struct event_key *key,
  88			   char *decode)
  89{
  90	const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
  91						  key->key);
  92
  93	scnprintf(decode, decode_str_len, "%s", exit_reason);
  94}
  95
  96static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
  97{
  98	struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
  99
 100	for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
 101		if (!strcmp(events_ops->name, kvm->report_event)) {
 102			kvm->events_ops = events_ops->ops;
 103			return true;
 104		}
 105	}
 106
 107	return false;
 108}
 109
 110struct vcpu_event_record {
 111	int vcpu_id;
 112	u64 start_time;
 113	struct kvm_event *last_event;
 114};
 115
 116
 117static void init_kvm_event_record(struct perf_kvm_stat *kvm)
 118{
 119	unsigned int i;
 120
 121	for (i = 0; i < EVENTS_CACHE_SIZE; i++)
 122		INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
 123}
 124
 125#ifdef HAVE_TIMERFD_SUPPORT
 126static void clear_events_cache_stats(struct list_head *kvm_events_cache)
 127{
 128	struct list_head *head;
 129	struct kvm_event *event;
 130	unsigned int i;
 131	int j;
 132
 133	for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
 134		head = &kvm_events_cache[i];
 135		list_for_each_entry(event, head, hash_entry) {
 136			/* reset stats for event */
 137			event->total.time = 0;
 138			init_stats(&event->total.stats);
 139
 140			for (j = 0; j < event->max_vcpu; ++j) {
 141				event->vcpu[j].time = 0;
 142				init_stats(&event->vcpu[j].stats);
 143			}
 144		}
 145	}
 146}
 147#endif
 148
 149static int kvm_events_hash_fn(u64 key)
 150{
 151	return key & (EVENTS_CACHE_SIZE - 1);
 152}
 153
 154static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
 155{
 156	int old_max_vcpu = event->max_vcpu;
 157	void *prev;
 158
 159	if (vcpu_id < event->max_vcpu)
 160		return true;
 161
 162	while (event->max_vcpu <= vcpu_id)
 163		event->max_vcpu += DEFAULT_VCPU_NUM;
 164
 165	prev = event->vcpu;
 166	event->vcpu = realloc(event->vcpu,
 167			      event->max_vcpu * sizeof(*event->vcpu));
 168	if (!event->vcpu) {
 169		free(prev);
 170		pr_err("Not enough memory\n");
 171		return false;
 172	}
 173
 174	memset(event->vcpu + old_max_vcpu, 0,
 175	       (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
 176	return true;
 177}
 178
 179static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
 180{
 181	struct kvm_event *event;
 182
 183	event = zalloc(sizeof(*event));
 184	if (!event) {
 185		pr_err("Not enough memory\n");
 186		return NULL;
 187	}
 188
 189	event->key = *key;
 190	init_stats(&event->total.stats);
 191	return event;
 192}
 193
 194static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
 195					       struct event_key *key)
 196{
 197	struct kvm_event *event;
 198	struct list_head *head;
 199
 200	BUG_ON(key->key == INVALID_KEY);
 201
 202	head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
 203	list_for_each_entry(event, head, hash_entry) {
 204		if (event->key.key == key->key && event->key.info == key->info)
 205			return event;
 206	}
 207
 208	event = kvm_alloc_init_event(key);
 209	if (!event)
 210		return NULL;
 211
 212	list_add(&event->hash_entry, head);
 213	return event;
 214}
 215
 216static bool handle_begin_event(struct perf_kvm_stat *kvm,
 217			       struct vcpu_event_record *vcpu_record,
 218			       struct event_key *key, u64 timestamp)
 219{
 220	struct kvm_event *event = NULL;
 221
 222	if (key->key != INVALID_KEY)
 223		event = find_create_kvm_event(kvm, key);
 224
 225	vcpu_record->last_event = event;
 226	vcpu_record->start_time = timestamp;
 227	return true;
 228}
 229
 230static void
 231kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
 232{
 233	kvm_stats->time += time_diff;
 234	update_stats(&kvm_stats->stats, time_diff);
 235}
 236
 237static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
 238{
 239	struct kvm_event_stats *kvm_stats = &event->total;
 240
 241	if (vcpu_id != -1)
 242		kvm_stats = &event->vcpu[vcpu_id];
 243
 244	return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
 245				avg_stats(&kvm_stats->stats));
 246}
 247
 248static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
 249			     u64 time_diff)
 250{
 251	if (vcpu_id == -1) {
 252		kvm_update_event_stats(&event->total, time_diff);
 253		return true;
 254	}
 255
 256	if (!kvm_event_expand(event, vcpu_id))
 257		return false;
 258
 259	kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
 260	return true;
 261}
 262
 263static bool is_child_event(struct perf_kvm_stat *kvm,
 264			   struct perf_evsel *evsel,
 265			   struct perf_sample *sample,
 266			   struct event_key *key)
 267{
 268	struct child_event_ops *child_ops;
 269
 270	child_ops = kvm->events_ops->child_ops;
 271
 272	if (!child_ops)
 273		return false;
 274
 275	for (; child_ops->name; child_ops++) {
 276		if (!strcmp(evsel->name, child_ops->name)) {
 277			child_ops->get_key(evsel, sample, key);
 278			return true;
 279		}
 280	}
 281
 282	return false;
 283}
 284
 285static bool handle_child_event(struct perf_kvm_stat *kvm,
 286			       struct vcpu_event_record *vcpu_record,
 287			       struct event_key *key,
 288			       struct perf_sample *sample __maybe_unused)
 289{
 290	struct kvm_event *event = NULL;
 291
 292	if (key->key != INVALID_KEY)
 293		event = find_create_kvm_event(kvm, key);
 294
 295	vcpu_record->last_event = event;
 296
 297	return true;
 298}
 299
 300static bool skip_event(const char *event)
 301{
 302	const char * const *skip_events;
 303
 304	for (skip_events = kvm_skip_events; *skip_events; skip_events++)
 305		if (!strcmp(event, *skip_events))
 306			return true;
 307
 308	return false;
 309}
 310
 311static bool handle_end_event(struct perf_kvm_stat *kvm,
 312			     struct vcpu_event_record *vcpu_record,
 313			     struct event_key *key,
 314			     struct perf_sample *sample)
 315{
 316	struct kvm_event *event;
 317	u64 time_begin, time_diff;
 318	int vcpu;
 319
 320	if (kvm->trace_vcpu == -1)
 321		vcpu = -1;
 322	else
 323		vcpu = vcpu_record->vcpu_id;
 324
 325	event = vcpu_record->last_event;
 326	time_begin = vcpu_record->start_time;
 327
 328	/* The begin event is not caught. */
 329	if (!time_begin)
 330		return true;
 331
 332	/*
 333	 * In some case, the 'begin event' only records the start timestamp,
 334	 * the actual event is recognized in the 'end event' (e.g. mmio-event).
 335	 */
 336
 337	/* Both begin and end events did not get the key. */
 338	if (!event && key->key == INVALID_KEY)
 339		return true;
 340
 341	if (!event)
 342		event = find_create_kvm_event(kvm, key);
 343
 344	if (!event)
 345		return false;
 346
 347	vcpu_record->last_event = NULL;
 348	vcpu_record->start_time = 0;
 349
 350	/* seems to happen once in a while during live mode */
 351	if (sample->time < time_begin) {
 352		pr_debug("End time before begin time; skipping event.\n");
 353		return true;
 354	}
 355
 356	time_diff = sample->time - time_begin;
 357
 358	if (kvm->duration && time_diff > kvm->duration) {
 359		char decode[decode_str_len];
 360
 361		kvm->events_ops->decode_key(kvm, &event->key, decode);
 362		if (!skip_event(decode)) {
 363			pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
 364				 sample->time, sample->pid, vcpu_record->vcpu_id,
 365				 decode, time_diff/1000);
 366		}
 367	}
 368
 369	return update_kvm_event(event, vcpu, time_diff);
 370}
 371
 372static
 373struct vcpu_event_record *per_vcpu_record(struct thread *thread,
 374					  struct perf_evsel *evsel,
 375					  struct perf_sample *sample)
 376{
 377	/* Only kvm_entry records vcpu id. */
 378	if (!thread__priv(thread) && kvm_entry_event(evsel)) {
 379		struct vcpu_event_record *vcpu_record;
 380
 381		vcpu_record = zalloc(sizeof(*vcpu_record));
 382		if (!vcpu_record) {
 383			pr_err("%s: Not enough memory\n", __func__);
 384			return NULL;
 385		}
 386
 387		vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
 388							  vcpu_id_str);
 389		thread__set_priv(thread, vcpu_record);
 390	}
 391
 392	return thread__priv(thread);
 393}
 394
 395static bool handle_kvm_event(struct perf_kvm_stat *kvm,
 396			     struct thread *thread,
 397			     struct perf_evsel *evsel,
 398			     struct perf_sample *sample)
 399{
 400	struct vcpu_event_record *vcpu_record;
 401	struct event_key key = { .key = INVALID_KEY,
 402				 .exit_reasons = kvm->exit_reasons };
 403
 404	vcpu_record = per_vcpu_record(thread, evsel, sample);
 405	if (!vcpu_record)
 406		return true;
 407
 408	/* only process events for vcpus user cares about */
 409	if ((kvm->trace_vcpu != -1) &&
 410	    (kvm->trace_vcpu != vcpu_record->vcpu_id))
 411		return true;
 412
 413	if (kvm->events_ops->is_begin_event(evsel, sample, &key))
 414		return handle_begin_event(kvm, vcpu_record, &key, sample->time);
 415
 416	if (is_child_event(kvm, evsel, sample, &key))
 417		return handle_child_event(kvm, vcpu_record, &key, sample);
 418
 419	if (kvm->events_ops->is_end_event(evsel, sample, &key))
 420		return handle_end_event(kvm, vcpu_record, &key, sample);
 421
 422	return true;
 423}
 424
 425#define GET_EVENT_KEY(func, field)					\
 426static u64 get_event_ ##func(struct kvm_event *event, int vcpu)		\
 427{									\
 428	if (vcpu == -1)							\
 429		return event->total.field;				\
 430									\
 431	if (vcpu >= event->max_vcpu)					\
 432		return 0;						\
 433									\
 434	return event->vcpu[vcpu].field;					\
 435}
 436
 437#define COMPARE_EVENT_KEY(func, field)					\
 438GET_EVENT_KEY(func, field)						\
 439static int compare_kvm_event_ ## func(struct kvm_event *one,		\
 440					struct kvm_event *two, int vcpu)\
 441{									\
 442	return get_event_ ##func(one, vcpu) >				\
 443				get_event_ ##func(two, vcpu);		\
 444}
 445
 446GET_EVENT_KEY(time, time);
 447COMPARE_EVENT_KEY(count, stats.n);
 448COMPARE_EVENT_KEY(mean, stats.mean);
 449GET_EVENT_KEY(max, stats.max);
 450GET_EVENT_KEY(min, stats.min);
 451
 452#define DEF_SORT_NAME_KEY(name, compare_key)				\
 453	{ #name, compare_kvm_event_ ## compare_key }
 454
 455static struct kvm_event_key keys[] = {
 456	DEF_SORT_NAME_KEY(sample, count),
 457	DEF_SORT_NAME_KEY(time, mean),
 458	{ NULL, NULL }
 459};
 460
 461static bool select_key(struct perf_kvm_stat *kvm)
 462{
 463	int i;
 464
 465	for (i = 0; keys[i].name; i++) {
 466		if (!strcmp(keys[i].name, kvm->sort_key)) {
 467			kvm->compare = keys[i].key;
 468			return true;
 469		}
 470	}
 471
 472	pr_err("Unknown compare key:%s\n", kvm->sort_key);
 473	return false;
 474}
 475
 476static void insert_to_result(struct rb_root *result, struct kvm_event *event,
 477			     key_cmp_fun bigger, int vcpu)
 478{
 479	struct rb_node **rb = &result->rb_node;
 480	struct rb_node *parent = NULL;
 481	struct kvm_event *p;
 482
 483	while (*rb) {
 484		p = container_of(*rb, struct kvm_event, rb);
 485		parent = *rb;
 486
 487		if (bigger(event, p, vcpu))
 488			rb = &(*rb)->rb_left;
 489		else
 490			rb = &(*rb)->rb_right;
 491	}
 492
 493	rb_link_node(&event->rb, parent, rb);
 494	rb_insert_color(&event->rb, result);
 495}
 496
 497static void
 498update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
 499{
 500	int vcpu = kvm->trace_vcpu;
 501
 502	kvm->total_count += get_event_count(event, vcpu);
 503	kvm->total_time += get_event_time(event, vcpu);
 504}
 505
 506static bool event_is_valid(struct kvm_event *event, int vcpu)
 507{
 508	return !!get_event_count(event, vcpu);
 509}
 510
 511static void sort_result(struct perf_kvm_stat *kvm)
 512{
 513	unsigned int i;
 514	int vcpu = kvm->trace_vcpu;
 515	struct kvm_event *event;
 516
 517	for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
 518		list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
 519			if (event_is_valid(event, vcpu)) {
 520				update_total_count(kvm, event);
 521				insert_to_result(&kvm->result, event,
 522						 kvm->compare, vcpu);
 523			}
 524		}
 525	}
 526}
 527
 528/* returns left most element of result, and erase it */
 529static struct kvm_event *pop_from_result(struct rb_root *result)
 530{
 531	struct rb_node *node = rb_first(result);
 532
 533	if (!node)
 534		return NULL;
 535
 536	rb_erase(node, result);
 537	return container_of(node, struct kvm_event, rb);
 538}
 539
 540static void print_vcpu_info(struct perf_kvm_stat *kvm)
 541{
 542	int vcpu = kvm->trace_vcpu;
 543
 544	pr_info("Analyze events for ");
 545
 546	if (kvm->opts.target.system_wide)
 547		pr_info("all VMs, ");
 548	else if (kvm->opts.target.pid)
 549		pr_info("pid(s) %s, ", kvm->opts.target.pid);
 550	else
 551		pr_info("dazed and confused on what is monitored, ");
 552
 553	if (vcpu == -1)
 554		pr_info("all VCPUs:\n\n");
 555	else
 556		pr_info("VCPU %d:\n\n", vcpu);
 557}
 558
 559static void show_timeofday(void)
 560{
 561	char date[64];
 562	struct timeval tv;
 563	struct tm ltime;
 564
 565	gettimeofday(&tv, NULL);
 566	if (localtime_r(&tv.tv_sec, &ltime)) {
 567		strftime(date, sizeof(date), "%H:%M:%S", &ltime);
 568		pr_info("%s.%06ld", date, tv.tv_usec);
 569	} else
 570		pr_info("00:00:00.000000");
 571
 572	return;
 573}
 574
 575static void print_result(struct perf_kvm_stat *kvm)
 576{
 577	char decode[decode_str_len];
 578	struct kvm_event *event;
 579	int vcpu = kvm->trace_vcpu;
 580
 581	if (kvm->live) {
 582		puts(CONSOLE_CLEAR);
 583		show_timeofday();
 584	}
 585
 586	pr_info("\n\n");
 587	print_vcpu_info(kvm);
 588	pr_info("%*s ", decode_str_len, kvm->events_ops->name);
 589	pr_info("%10s ", "Samples");
 590	pr_info("%9s ", "Samples%");
 591
 592	pr_info("%9s ", "Time%");
 593	pr_info("%11s ", "Min Time");
 594	pr_info("%11s ", "Max Time");
 595	pr_info("%16s ", "Avg time");
 596	pr_info("\n\n");
 597
 598	while ((event = pop_from_result(&kvm->result))) {
 599		u64 ecount, etime, max, min;
 600
 601		ecount = get_event_count(event, vcpu);
 602		etime = get_event_time(event, vcpu);
 603		max = get_event_max(event, vcpu);
 604		min = get_event_min(event, vcpu);
 605
 606		kvm->events_ops->decode_key(kvm, &event->key, decode);
 607		pr_info("%*s ", decode_str_len, decode);
 608		pr_info("%10llu ", (unsigned long long)ecount);
 609		pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
 610		pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
 611		pr_info("%9.2fus ", (double)min / 1e3);
 612		pr_info("%9.2fus ", (double)max / 1e3);
 613		pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
 614			kvm_event_rel_stddev(vcpu, event));
 615		pr_info("\n");
 616	}
 617
 618	pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
 619		kvm->total_count, kvm->total_time / 1e3);
 620
 621	if (kvm->lost_events)
 622		pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
 623}
 624
 625#ifdef HAVE_TIMERFD_SUPPORT
 626static int process_lost_event(struct perf_tool *tool,
 627			      union perf_event *event __maybe_unused,
 628			      struct perf_sample *sample __maybe_unused,
 629			      struct machine *machine __maybe_unused)
 630{
 631	struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
 632
 633	kvm->lost_events++;
 634	return 0;
 635}
 636#endif
 637
 638static bool skip_sample(struct perf_kvm_stat *kvm,
 639			struct perf_sample *sample)
 640{
 641	if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
 642		return true;
 643
 644	return false;
 645}
 646
 647static int process_sample_event(struct perf_tool *tool,
 648				union perf_event *event,
 649				struct perf_sample *sample,
 650				struct perf_evsel *evsel,
 651				struct machine *machine)
 652{
 653	int err = 0;
 654	struct thread *thread;
 655	struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
 656						 tool);
 657
 658	if (skip_sample(kvm, sample))
 659		return 0;
 660
 661	thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 662	if (thread == NULL) {
 663		pr_debug("problem processing %d event, skipping it.\n",
 664			event->header.type);
 665		return -1;
 666	}
 667
 668	if (!handle_kvm_event(kvm, thread, evsel, sample))
 669		err = -1;
 670
 671	thread__put(thread);
 672	return err;
 673}
 674
 675static int cpu_isa_config(struct perf_kvm_stat *kvm)
 676{
 677	char buf[64], *cpuid;
 678	int err;
 679
 680	if (kvm->live) {
 681		err = get_cpuid(buf, sizeof(buf));
 682		if (err != 0) {
 683			pr_err("Failed to look up CPU type\n");
 684			return err;
 685		}
 686		cpuid = buf;
 687	} else
 688		cpuid = kvm->session->header.env.cpuid;
 689
 690	if (!cpuid) {
 691		pr_err("Failed to look up CPU type\n");
 692		return -EINVAL;
 693	}
 694
 695	err = cpu_isa_init(kvm, cpuid);
 696	if (err == -ENOTSUP)
 697		pr_err("CPU %s is not supported.\n", cpuid);
 698
 699	return err;
 700}
 701
 702static bool verify_vcpu(int vcpu)
 703{
 704	if (vcpu != -1 && vcpu < 0) {
 705		pr_err("Invalid vcpu:%d.\n", vcpu);
 706		return false;
 707	}
 708
 709	return true;
 710}
 711
 712#ifdef HAVE_TIMERFD_SUPPORT
 713/* keeping the max events to a modest level to keep
 714 * the processing of samples per mmap smooth.
 715 */
 716#define PERF_KVM__MAX_EVENTS_PER_MMAP  25
 717
 718static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 719				   u64 *mmap_time)
 720{
 721	union perf_event *event;
 722	struct perf_sample sample;
 723	s64 n = 0;
 724	int err;
 725
 726	*mmap_time = ULLONG_MAX;
 727	while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
 728		err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
 729		if (err) {
 730			perf_evlist__mmap_consume(kvm->evlist, idx);
 731			pr_err("Failed to parse sample\n");
 732			return -1;
 733		}
 734
 735		err = perf_session__queue_event(kvm->session, event, &sample, 0);
 736		/*
 737		 * FIXME: Here we can't consume the event, as perf_session__queue_event will
 738		 *        point to it, and it'll get possibly overwritten by the kernel.
 739		 */
 740		perf_evlist__mmap_consume(kvm->evlist, idx);
 741
 742		if (err) {
 743			pr_err("Failed to enqueue sample: %d\n", err);
 744			return -1;
 745		}
 746
 747		/* save time stamp of our first sample for this mmap */
 748		if (n == 0)
 749			*mmap_time = sample.time;
 750
 751		/* limit events per mmap handled all at once */
 752		n++;
 753		if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
 754			break;
 755	}
 756
 757	return n;
 758}
 759
 760static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
 761{
 762	int i, err, throttled = 0;
 763	s64 n, ntotal = 0;
 764	u64 flush_time = ULLONG_MAX, mmap_time;
 765
 766	for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
 767		n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
 768		if (n < 0)
 769			return -1;
 770
 771		/* flush time is going to be the minimum of all the individual
 772		 * mmap times. Essentially, we flush all the samples queued up
 773		 * from the last pass under our minimal start time -- that leaves
 774		 * a very small race for samples to come in with a lower timestamp.
 775		 * The ioctl to return the perf_clock timestamp should close the
 776		 * race entirely.
 777		 */
 778		if (mmap_time < flush_time)
 779			flush_time = mmap_time;
 780
 781		ntotal += n;
 782		if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
 783			throttled = 1;
 784	}
 785
 786	/* flush queue after each round in which we processed events */
 787	if (ntotal) {
 788		struct ordered_events *oe = &kvm->session->ordered_events;
 789
 790		oe->next_flush = flush_time;
 791		err = ordered_events__flush(oe, OE_FLUSH__ROUND);
 792		if (err) {
 793			if (kvm->lost_events)
 794				pr_info("\nLost events: %" PRIu64 "\n\n",
 795					kvm->lost_events);
 796			return err;
 797		}
 798	}
 799
 800	return throttled;
 801}
 802
 803static volatile int done;
 804
 805static void sig_handler(int sig __maybe_unused)
 806{
 807	done = 1;
 808}
 809
 810static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
 811{
 812	struct itimerspec new_value;
 813	int rc = -1;
 814
 815	kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
 816	if (kvm->timerfd < 0) {
 817		pr_err("timerfd_create failed\n");
 818		goto out;
 819	}
 820
 821	new_value.it_value.tv_sec = kvm->display_time;
 822	new_value.it_value.tv_nsec = 0;
 823	new_value.it_interval.tv_sec = kvm->display_time;
 824	new_value.it_interval.tv_nsec = 0;
 825
 826	if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
 827		pr_err("timerfd_settime failed: %d\n", errno);
 828		close(kvm->timerfd);
 829		goto out;
 830	}
 831
 832	rc = 0;
 833out:
 834	return rc;
 835}
 836
 837static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
 838{
 839	uint64_t c;
 840	int rc;
 841
 842	rc = read(kvm->timerfd, &c, sizeof(uint64_t));
 843	if (rc < 0) {
 844		if (errno == EAGAIN)
 845			return 0;
 846
 847		pr_err("Failed to read timer fd: %d\n", errno);
 848		return -1;
 849	}
 850
 851	if (rc != sizeof(uint64_t)) {
 852		pr_err("Error reading timer fd - invalid size returned\n");
 853		return -1;
 854	}
 855
 856	if (c != 1)
 857		pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
 858
 859	/* update display */
 860	sort_result(kvm);
 861	print_result(kvm);
 862
 863	/* reset counts */
 864	clear_events_cache_stats(kvm->kvm_events_cache);
 865	kvm->total_count = 0;
 866	kvm->total_time = 0;
 867	kvm->lost_events = 0;
 868
 869	return 0;
 870}
 871
 872static int fd_set_nonblock(int fd)
 873{
 874	long arg = 0;
 875
 876	arg = fcntl(fd, F_GETFL);
 877	if (arg < 0) {
 878		pr_err("Failed to get current flags for fd %d\n", fd);
 879		return -1;
 880	}
 881
 882	if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
 883		pr_err("Failed to set non-block option on fd %d\n", fd);
 884		return -1;
 885	}
 886
 887	return 0;
 888}
 889
 890static int perf_kvm__handle_stdin(void)
 891{
 892	int c;
 893
 894	c = getc(stdin);
 895	if (c == 'q')
 896		return 1;
 897
 898	return 0;
 899}
 900
 901static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 902{
 903	int nr_stdin, ret, err = -EINVAL;
 904	struct termios save;
 905
 906	/* live flag must be set first */
 907	kvm->live = true;
 908
 909	ret = cpu_isa_config(kvm);
 910	if (ret < 0)
 911		return ret;
 912
 913	if (!verify_vcpu(kvm->trace_vcpu) ||
 914	    !select_key(kvm) ||
 915	    !register_kvm_events_ops(kvm)) {
 916		goto out;
 917	}
 918
 919	set_term_quiet_input(&save);
 920	init_kvm_event_record(kvm);
 921
 922	signal(SIGINT, sig_handler);
 923	signal(SIGTERM, sig_handler);
 924
 925	/* add timer fd */
 926	if (perf_kvm__timerfd_create(kvm) < 0) {
 927		err = -1;
 928		goto out;
 929	}
 930
 931	if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
 932		goto out;
 933
 934	nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
 935	if (nr_stdin < 0)
 936		goto out;
 937
 938	if (fd_set_nonblock(fileno(stdin)) != 0)
 939		goto out;
 940
 941	/* everything is good - enable the events and process */
 942	perf_evlist__enable(kvm->evlist);
 943
 944	while (!done) {
 945		struct fdarray *fda = &kvm->evlist->pollfd;
 946		int rc;
 947
 948		rc = perf_kvm__mmap_read(kvm);
 949		if (rc < 0)
 950			break;
 951
 952		err = perf_kvm__handle_timerfd(kvm);
 953		if (err)
 954			goto out;
 955
 956		if (fda->entries[nr_stdin].revents & POLLIN)
 957			done = perf_kvm__handle_stdin();
 958
 959		if (!rc && !done)
 960			err = fdarray__poll(fda, 100);
 961	}
 962
 963	perf_evlist__disable(kvm->evlist);
 964
 965	if (err == 0) {
 966		sort_result(kvm);
 967		print_result(kvm);
 968	}
 969
 970out:
 971	if (kvm->timerfd >= 0)
 972		close(kvm->timerfd);
 973
 974	tcsetattr(0, TCSAFLUSH, &save);
 975	return err;
 976}
 977
 978static int kvm_live_open_events(struct perf_kvm_stat *kvm)
 979{
 980	int err, rc = -1;
 981	struct perf_evsel *pos;
 982	struct perf_evlist *evlist = kvm->evlist;
 983	char sbuf[STRERR_BUFSIZE];
 984
 985	perf_evlist__config(evlist, &kvm->opts);
 986
 987	/*
 988	 * Note: exclude_{guest,host} do not apply here.
 989	 *       This command processes KVM tracepoints from host only
 990	 */
 991	evlist__for_each(evlist, pos) {
 992		struct perf_event_attr *attr = &pos->attr;
 993
 994		/* make sure these *are* set */
 995		perf_evsel__set_sample_bit(pos, TID);
 996		perf_evsel__set_sample_bit(pos, TIME);
 997		perf_evsel__set_sample_bit(pos, CPU);
 998		perf_evsel__set_sample_bit(pos, RAW);
 999		/* make sure these are *not*; want as small a sample as possible */
1000		perf_evsel__reset_sample_bit(pos, PERIOD);
1001		perf_evsel__reset_sample_bit(pos, IP);
1002		perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1003		perf_evsel__reset_sample_bit(pos, ADDR);
1004		perf_evsel__reset_sample_bit(pos, READ);
1005		attr->mmap = 0;
1006		attr->comm = 0;
1007		attr->task = 0;
1008
1009		attr->sample_period = 1;
1010
1011		attr->watermark = 0;
1012		attr->wakeup_events = 1000;
1013
1014		/* will enable all once we are ready */
1015		attr->disabled = 1;
1016	}
1017
1018	err = perf_evlist__open(evlist);
1019	if (err < 0) {
1020		printf("Couldn't create the events: %s\n",
1021		       strerror_r(errno, sbuf, sizeof(sbuf)));
1022		goto out;
1023	}
1024
1025	if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1026		ui__error("Failed to mmap the events: %s\n",
1027			  strerror_r(errno, sbuf, sizeof(sbuf)));
1028		perf_evlist__close(evlist);
1029		goto out;
1030	}
1031
1032	rc = 0;
1033
1034out:
1035	return rc;
1036}
1037#endif
1038
1039static int read_events(struct perf_kvm_stat *kvm)
1040{
1041	int ret;
1042
1043	struct perf_tool eops = {
1044		.sample			= process_sample_event,
1045		.comm			= perf_event__process_comm,
1046		.ordered_events		= true,
1047	};
1048	struct perf_data_file file = {
1049		.path = kvm->file_name,
1050		.mode = PERF_DATA_MODE_READ,
1051		.force = kvm->force,
1052	};
1053
1054	kvm->tool = eops;
1055	kvm->session = perf_session__new(&file, false, &kvm->tool);
1056	if (!kvm->session) {
1057		pr_err("Initializing perf session failed\n");
1058		return -1;
1059	}
1060
1061	symbol__init(&kvm->session->header.env);
1062
1063	if (!perf_session__has_traces(kvm->session, "kvm record")) {
1064		ret = -EINVAL;
1065		goto out_delete;
1066	}
1067
1068	/*
1069	 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1070	 * traced in the old kernel.
1071	 */
1072	ret = cpu_isa_config(kvm);
1073	if (ret < 0)
1074		goto out_delete;
1075
1076	ret = perf_session__process_events(kvm->session);
1077
1078out_delete:
1079	perf_session__delete(kvm->session);
1080	return ret;
1081}
1082
1083static int parse_target_str(struct perf_kvm_stat *kvm)
1084{
1085	if (kvm->opts.target.pid) {
1086		kvm->pid_list = intlist__new(kvm->opts.target.pid);
1087		if (kvm->pid_list == NULL) {
1088			pr_err("Error parsing process id string\n");
1089			return -EINVAL;
1090		}
1091	}
1092
1093	return 0;
1094}
1095
1096static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1097{
1098	int ret = -EINVAL;
1099	int vcpu = kvm->trace_vcpu;
1100
1101	if (parse_target_str(kvm) != 0)
1102		goto exit;
1103
1104	if (!verify_vcpu(vcpu))
1105		goto exit;
1106
1107	if (!select_key(kvm))
1108		goto exit;
1109
1110	if (!register_kvm_events_ops(kvm))
1111		goto exit;
1112
1113	init_kvm_event_record(kvm);
1114	setup_pager();
1115
1116	ret = read_events(kvm);
1117	if (ret)
1118		goto exit;
1119
1120	sort_result(kvm);
1121	print_result(kvm);
1122
1123exit:
1124	return ret;
1125}
1126
1127#define STRDUP_FAIL_EXIT(s)		\
1128	({	char *_p;		\
1129	_p = strdup(s);		\
1130		if (!_p)		\
1131			return -ENOMEM;	\
1132		_p;			\
1133	})
1134
1135int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1136{
1137	return 0;
1138}
1139
1140static int
1141kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1142{
1143	unsigned int rec_argc, i, j, events_tp_size;
1144	const char **rec_argv;
1145	const char * const record_args[] = {
1146		"record",
1147		"-R",
1148		"-m", "1024",
1149		"-c", "1",
1150	};
1151	const char * const kvm_stat_record_usage[] = {
1152		"perf kvm stat record [<options>]",
1153		NULL
1154	};
1155	const char * const *events_tp;
1156	int ret;
1157
1158	events_tp_size = 0;
1159	ret = setup_kvm_events_tp(kvm);
1160	if (ret < 0) {
1161		pr_err("Unable to setup the kvm tracepoints\n");
1162		return ret;
1163	}
1164
1165	for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1166		events_tp_size++;
1167
1168	rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1169		   2 * events_tp_size;
1170	rec_argv = calloc(rec_argc + 1, sizeof(char *));
1171
1172	if (rec_argv == NULL)
1173		return -ENOMEM;
1174
1175	for (i = 0; i < ARRAY_SIZE(record_args); i++)
1176		rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1177
1178	for (j = 0; j < events_tp_size; j++) {
1179		rec_argv[i++] = "-e";
1180		rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1181	}
1182
1183	rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1184	rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1185
1186	for (j = 1; j < (unsigned int)argc; j++, i++)
1187		rec_argv[i] = argv[j];
1188
1189	set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1190	set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1191	set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1192
1193	set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1194	set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1195	set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1196	set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1197	set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1198	set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1199	set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1200	set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1201	set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1202	set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1203	set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1204	set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1205	set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1206	set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1207	set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1208
1209	record_usage = kvm_stat_record_usage;
1210	return cmd_record(i, rec_argv, NULL);
1211}
1212
1213static int
1214kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1215{
1216	const struct option kvm_events_report_options[] = {
1217		OPT_STRING(0, "event", &kvm->report_event, "report event",
1218			   "event for reporting: vmexit, "
1219			   "mmio (x86 only), ioport (x86 only)"),
1220		OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1221			    "vcpu id to report"),
1222		OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1223			    "key for sorting: sample(sort by samples number)"
1224			    " time (sort by avg time)"),
1225		OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1226			   "analyze events only for given process id(s)"),
1227		OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1228		OPT_END()
1229	};
1230
1231	const char * const kvm_events_report_usage[] = {
1232		"perf kvm stat report [<options>]",
1233		NULL
1234	};
1235
1236	if (argc) {
1237		argc = parse_options(argc, argv,
1238				     kvm_events_report_options,
1239				     kvm_events_report_usage, 0);
1240		if (argc)
1241			usage_with_options(kvm_events_report_usage,
1242					   kvm_events_report_options);
1243	}
1244
1245	if (!kvm->opts.target.pid)
1246		kvm->opts.target.system_wide = true;
1247
1248	return kvm_events_report_vcpu(kvm);
1249}
1250
1251#ifdef HAVE_TIMERFD_SUPPORT
1252static struct perf_evlist *kvm_live_event_list(void)
1253{
1254	struct perf_evlist *evlist;
1255	char *tp, *name, *sys;
1256	int err = -1;
1257	const char * const *events_tp;
1258
1259	evlist = perf_evlist__new();
1260	if (evlist == NULL)
1261		return NULL;
1262
1263	for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1264
1265		tp = strdup(*events_tp);
1266		if (tp == NULL)
1267			goto out;
1268
1269		/* split tracepoint into subsystem and name */
1270		sys = tp;
1271		name = strchr(tp, ':');
1272		if (name == NULL) {
1273			pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1274			       *events_tp);
1275			free(tp);
1276			goto out;
1277		}
1278		*name = '\0';
1279		name++;
1280
1281		if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1282			pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1283			free(tp);
1284			goto out;
1285		}
1286
1287		free(tp);
1288	}
1289
1290	err = 0;
1291
1292out:
1293	if (err) {
1294		perf_evlist__delete(evlist);
1295		evlist = NULL;
1296	}
1297
1298	return evlist;
1299}
1300
1301static int kvm_events_live(struct perf_kvm_stat *kvm,
1302			   int argc, const char **argv)
1303{
1304	char errbuf[BUFSIZ];
1305	int err;
1306
1307	const struct option live_options[] = {
1308		OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1309			"record events on existing process id"),
1310		OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1311			"number of mmap data pages",
1312			perf_evlist__parse_mmap_pages),
1313		OPT_INCR('v', "verbose", &verbose,
1314			"be more verbose (show counter open errors, etc)"),
1315		OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1316			"system-wide collection from all CPUs"),
1317		OPT_UINTEGER('d', "display", &kvm->display_time,
1318			"time in seconds between display updates"),
1319		OPT_STRING(0, "event", &kvm->report_event, "report event",
1320			"event for reporting: "
1321			"vmexit, mmio (x86 only), ioport (x86 only)"),
1322		OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1323			"vcpu id to report"),
1324		OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1325			"key for sorting: sample(sort by samples number)"
1326			" time (sort by avg time)"),
1327		OPT_U64(0, "duration", &kvm->duration,
1328			"show events other than"
1329			" HLT (x86 only) or Wait state (s390 only)"
1330			" that take longer than duration usecs"),
1331		OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1332				"per thread proc mmap processing timeout in ms"),
1333		OPT_END()
1334	};
1335	const char * const live_usage[] = {
1336		"perf kvm stat live [<options>]",
1337		NULL
1338	};
1339	struct perf_data_file file = {
1340		.mode = PERF_DATA_MODE_WRITE,
1341	};
1342
1343
1344	/* event handling */
1345	kvm->tool.sample = process_sample_event;
1346	kvm->tool.comm   = perf_event__process_comm;
1347	kvm->tool.exit   = perf_event__process_exit;
1348	kvm->tool.fork   = perf_event__process_fork;
1349	kvm->tool.lost   = process_lost_event;
1350	kvm->tool.ordered_events = true;
1351	perf_tool__fill_defaults(&kvm->tool);
1352
1353	/* set defaults */
1354	kvm->display_time = 1;
1355	kvm->opts.user_interval = 1;
1356	kvm->opts.mmap_pages = 512;
1357	kvm->opts.target.uses_mmap = false;
1358	kvm->opts.target.uid_str = NULL;
1359	kvm->opts.target.uid = UINT_MAX;
1360	kvm->opts.proc_map_timeout = 500;
1361
1362	symbol__init(NULL);
1363	disable_buildid_cache();
1364
1365	use_browser = 0;
1366
1367	if (argc) {
1368		argc = parse_options(argc, argv, live_options,
1369				     live_usage, 0);
1370		if (argc)
1371			usage_with_options(live_usage, live_options);
1372	}
1373
1374	kvm->duration *= NSEC_PER_USEC;   /* convert usec to nsec */
1375
1376	/*
1377	 * target related setups
1378	 */
1379	err = target__validate(&kvm->opts.target);
1380	if (err) {
1381		target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1382		ui__warning("%s", errbuf);
1383	}
1384
1385	if (target__none(&kvm->opts.target))
1386		kvm->opts.target.system_wide = true;
1387
1388
1389	/*
1390	 * generate the event list
1391	 */
1392	err = setup_kvm_events_tp(kvm);
1393	if (err < 0) {
1394		pr_err("Unable to setup the kvm tracepoints\n");
1395		return err;
1396	}
1397
1398	kvm->evlist = kvm_live_event_list();
1399	if (kvm->evlist == NULL) {
1400		err = -1;
1401		goto out;
1402	}
1403
1404	symbol_conf.nr_events = kvm->evlist->nr_entries;
1405
1406	if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1407		usage_with_options(live_usage, live_options);
1408
1409	/*
1410	 * perf session
1411	 */
1412	kvm->session = perf_session__new(&file, false, &kvm->tool);
1413	if (kvm->session == NULL) {
1414		err = -1;
1415		goto out;
1416	}
1417	kvm->session->evlist = kvm->evlist;
1418	perf_session__set_id_hdr_size(kvm->session);
1419	ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1420	machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1421				    kvm->evlist->threads, false, kvm->opts.proc_map_timeout);
1422	err = kvm_live_open_events(kvm);
1423	if (err)
1424		goto out;
1425
1426	err = kvm_events_live_report(kvm);
1427
1428out:
1429	if (kvm->session)
1430		perf_session__delete(kvm->session);
1431	kvm->session = NULL;
1432	if (kvm->evlist)
1433		perf_evlist__delete(kvm->evlist);
1434
1435	return err;
1436}
1437#endif
1438
1439static void print_kvm_stat_usage(void)
1440{
1441	printf("Usage: perf kvm stat <command>\n\n");
1442
1443	printf("# Available commands:\n");
1444	printf("\trecord: record kvm events\n");
1445	printf("\treport: report statistical data of kvm events\n");
1446	printf("\tlive:   live reporting of statistical data of kvm events\n");
1447
1448	printf("\nOtherwise, it is the alias of 'perf stat':\n");
1449}
1450
1451static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1452{
1453	struct perf_kvm_stat kvm = {
1454		.file_name = file_name,
1455
1456		.trace_vcpu	= -1,
1457		.report_event	= "vmexit",
1458		.sort_key	= "sample",
1459
1460	};
1461
1462	if (argc == 1) {
1463		print_kvm_stat_usage();
1464		goto perf_stat;
1465	}
1466
1467	if (!strncmp(argv[1], "rec", 3))
1468		return kvm_events_record(&kvm, argc - 1, argv + 1);
1469
1470	if (!strncmp(argv[1], "rep", 3))
1471		return kvm_events_report(&kvm, argc - 1 , argv + 1);
1472
1473#ifdef HAVE_TIMERFD_SUPPORT
1474	if (!strncmp(argv[1], "live", 4))
1475		return kvm_events_live(&kvm, argc - 1 , argv + 1);
1476#endif
1477
1478perf_stat:
1479	return cmd_stat(argc, argv, NULL);
1480}
1481#endif /* HAVE_KVM_STAT_SUPPORT */
1482
1483static int __cmd_record(const char *file_name, int argc, const char **argv)
1484{
1485	int rec_argc, i = 0, j;
1486	const char **rec_argv;
1487
1488	rec_argc = argc + 2;
1489	rec_argv = calloc(rec_argc + 1, sizeof(char *));
1490	rec_argv[i++] = strdup("record");
1491	rec_argv[i++] = strdup("-o");
1492	rec_argv[i++] = strdup(file_name);
1493	for (j = 1; j < argc; j++, i++)
1494		rec_argv[i] = argv[j];
1495
1496	BUG_ON(i != rec_argc);
1497
1498	return cmd_record(i, rec_argv, NULL);
1499}
1500
1501static int __cmd_report(const char *file_name, int argc, const char **argv)
1502{
1503	int rec_argc, i = 0, j;
1504	const char **rec_argv;
1505
1506	rec_argc = argc + 2;
1507	rec_argv = calloc(rec_argc + 1, sizeof(char *));
1508	rec_argv[i++] = strdup("report");
1509	rec_argv[i++] = strdup("-i");
1510	rec_argv[i++] = strdup(file_name);
1511	for (j = 1; j < argc; j++, i++)
1512		rec_argv[i] = argv[j];
1513
1514	BUG_ON(i != rec_argc);
1515
1516	return cmd_report(i, rec_argv, NULL);
1517}
1518
1519static int
1520__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1521{
1522	int rec_argc, i = 0, j;
1523	const char **rec_argv;
1524
1525	rec_argc = argc + 2;
1526	rec_argv = calloc(rec_argc + 1, sizeof(char *));
1527	rec_argv[i++] = strdup("buildid-list");
1528	rec_argv[i++] = strdup("-i");
1529	rec_argv[i++] = strdup(file_name);
1530	for (j = 1; j < argc; j++, i++)
1531		rec_argv[i] = argv[j];
1532
1533	BUG_ON(i != rec_argc);
1534
1535	return cmd_buildid_list(i, rec_argv, NULL);
1536}
1537
1538int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1539{
1540	const char *file_name = NULL;
1541	const struct option kvm_options[] = {
1542		OPT_STRING('i', "input", &file_name, "file",
1543			   "Input file name"),
1544		OPT_STRING('o', "output", &file_name, "file",
1545			   "Output file name"),
1546		OPT_BOOLEAN(0, "guest", &perf_guest,
1547			    "Collect guest os data"),
1548		OPT_BOOLEAN(0, "host", &perf_host,
1549			    "Collect host os data"),
1550		OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1551			   "guest mount directory under which every guest os"
1552			   " instance has a subdir"),
1553		OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1554			   "file", "file saving guest os vmlinux"),
1555		OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1556			   "file", "file saving guest os /proc/kallsyms"),
1557		OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1558			   "file", "file saving guest os /proc/modules"),
1559		OPT_INCR('v', "verbose", &verbose,
1560			    "be more verbose (show counter open errors, etc)"),
1561		OPT_END()
1562	};
1563
1564	const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1565						"buildid-list", "stat", NULL };
1566	const char *kvm_usage[] = { NULL, NULL };
1567
1568	perf_host  = 0;
1569	perf_guest = 1;
1570
1571	argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1572					PARSE_OPT_STOP_AT_NON_OPTION);
1573	if (!argc)
1574		usage_with_options(kvm_usage, kvm_options);
1575
1576	if (!perf_host)
1577		perf_guest = 1;
1578
1579	if (!file_name) {
1580		file_name = get_filename_for_perf_kvm();
1581
1582		if (!file_name) {
1583			pr_err("Failed to allocate memory for filename\n");
1584			return -ENOMEM;
1585		}
 
1586	}
1587
1588	if (!strncmp(argv[0], "rec", 3))
1589		return __cmd_record(file_name, argc, argv);
1590	else if (!strncmp(argv[0], "rep", 3))
1591		return __cmd_report(file_name, argc, argv);
1592	else if (!strncmp(argv[0], "diff", 4))
1593		return cmd_diff(argc, argv, NULL);
1594	else if (!strncmp(argv[0], "top", 3))
1595		return cmd_top(argc, argv, NULL);
1596	else if (!strncmp(argv[0], "buildid-list", 12))
1597		return __cmd_buildid_list(file_name, argc, argv);
1598#ifdef HAVE_KVM_STAT_SUPPORT
1599	else if (!strncmp(argv[0], "stat", 4))
1600		return kvm_cmd_stat(file_name, argc, argv);
1601#endif
1602	else
1603		usage_with_options(kvm_usage, kvm_options);
1604
1605	return 0;
1606}