path: root/tools/perf/builtin-kvm.c

#include "builtin.h"
#include "perf.h"

#include "util/evsel.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/session.h"

#include "util/parse-options.h"
#include "util/trace-event.h"
#include "util/debug.h"
#include "util/debugfs.h"
#include "util/tool.h"
#include "util/stat.h"

#include <sys/prctl.h>

#include <semaphore.h>
#include <pthread.h>
#include <math.h>

#include "../../arch/x86/include/asm/svm.h"
#include "../../arch/x86/include/asm/vmx.h"
#include "../../arch/x86/include/asm/kvm.h"

struct event_key {
	#define INVALID_KEY     (~0ULL)
	u64 key;
	int info;
};

struct kvm_event_stats {
	u64 time;
	struct stats stats;
};

struct kvm_event {
	struct list_head hash_entry;
	struct rb_node rb;

	struct event_key key;

	struct kvm_event_stats total;

	#define DEFAULT_VCPU_NUM 8
	int max_vcpu;
	struct kvm_event_stats *vcpu;
};

typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);

struct kvm_event_key {
	const char *name;
	key_cmp_fun key;
};


struct perf_kvm;

struct kvm_events_ops {
	bool (*is_begin_event)(struct perf_evsel *evsel,
			       struct perf_sample *sample,
			       struct event_key *key);
	bool (*is_end_event)(struct perf_evsel *evsel,
			     struct perf_sample *sample, struct event_key *key);
	void (*decode_key)(struct perf_kvm *kvm, struct event_key *key,
			   char decode[20]);
	const char *name;
};

struct exit_reasons_table {
	unsigned long exit_code;
	const char *reason;
};

#define EVENTS_BITS		12
#define EVENTS_CACHE_SIZE	(1UL << EVENTS_BITS)

struct perf_kvm {
	struct perf_tool    tool;
	struct perf_session *session;

	const char *file_name;
	const char *report_event;
	const char *sort_key;
	int trace_vcpu;

	struct exit_reasons_table *exit_reasons;
	int exit_reasons_size;
	const char *exit_reasons_isa;

	struct kvm_events_ops *events_ops;
	key_cmp_fun compare;
	struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
	u64 total_time;
	u64 total_count;

	struct rb_root result;
};


static void exit_event_get_key(struct perf_evsel *evsel,
			       struct perf_sample *sample,
			       struct event_key *key)
{
	key->info = 0;
	key->key = perf_evsel__intval(evsel, sample, "exit_reason");
}

static bool kvm_exit_event(struct perf_evsel *evsel)
{
	return !strcmp(evsel->name, "kvm:kvm_exit");
}

static bool exit_event_begin(struct perf_evsel *evsel,
			     struct perf_sample *sample, struct event_key *key)
{
	if (kvm_exit_event(evsel)) {
		exit_event_get_key(evsel, sample, key);
		return true;
	}

	return false;
}

static bool kvm_entry_event(struct perf_evsel *evsel)
{
	return !strcmp(evsel->name, "kvm:kvm_entry");
}

static bool exit_event_end(struct perf_evsel *evsel,
			   struct perf_sample *sample __maybe_unused,
			   struct event_key *key __maybe_unused)
{
	return kvm_entry_event(evsel);
}

static struct exit_reasons_table vmx_exit_reasons[] = {
	VMX_EXIT_REASONS
};

static struct exit_reasons_table svm_exit_reasons[] = {
	SVM_EXIT_REASONS
};

static const char *get_exit_reason(struct perf_kvm *kvm, u64 exit_code)
{
	int i = kvm->exit_reasons_size;
	struct exit_reasons_table *tbl = kvm->exit_reasons;

	while (i--) {
		if (tbl->exit_code == exit_code)
			return tbl->reason;
		tbl++;
	}

	pr_err("unknown kvm exit code:%lld on %s\n",
		(unsigned long long)exit_code, kvm->exit_reasons_isa);
	return "UNKNOWN";
}

static void exit_event_decode_key(struct perf_kvm *kvm,
				  struct event_key *