1 files changed, 916 insertions, 40 deletions

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 9fc6e0fa3dc..260abc535b5 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1,6 +1,7 @@
 #include "builtin.h"
 #include "perf.h"
 
+#include "util/evsel.h"
 #include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
@@ -10,8 +11,10 @@
 
 #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>
 
@@ -19,36 +22,866 @@
 #include <pthread.h>
 #include <math.h>
 
-static const char		*file_name;
-static char			name_buffer[256];
+#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 *key,
+				  char decode[20])
+{
+	const char *exit_reason = get_exit_reason(kvm, key->key);
+
+	scnprintf(decode, 20, "%s", exit_reason);
+}
+
+static struct kvm_events_ops exit_events = {
+	.is_begin_event = exit_event_begin,
+	.is_end_event = exit_event_end,
+	.decode_key = exit_event_decode_key,
+	.name = "VM-EXIT"
+};
+
+/*
+ * For the mmio events, we treat:
+ * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
+ * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
+ */
+static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample,
+			       struct event_key *key)
+{
+	key->key  = perf_evsel__intval(evsel, sample, "gpa");
+	key->info = perf_evsel__intval(evsel, sample, "type");
+}
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+
+static bool mmio_event_begin(struct perf_evsel *evsel,
+			     struct perf_sample *sample, struct event_key *key)
+{
+	/* MMIO read begin event in kernel. */
+	if (kvm_exit_event(evsel))
+		return true;
+
+	/* MMIO write begin event in kernel. */
+	if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+	    perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
+		mmio_event_get_key(evsel, sample, key);
+		return true;
+	}
+
+	return false;
+}
+
+static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample,
+			   struct event_key *key)
+{
+	/* MMIO write end event in kernel. */
+	if (kvm_entry_event(evsel))
+		return true;
+
+	/* MMIO read end event in kernel.*/
+	if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+	    perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
+		mmio_event_get_key(evsel, sample, key);
+		return true;
+	}
+
+	return false;
+}
+
+static void mmio_event_decode_key(struct perf_kvm *kvm __maybe_unused,
+				  struct event_key *key,
+				  char decode[20])
+{
+	scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key,
+				key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
+}
+
+static struct kvm_events_ops mmio_events = {
+	.is_begin_event = mmio_event_begin,
+	.is_end_event = mmio_event_end,
+	.decode_key = mmio_event_decode_key,
+	.name = "MMIO Access"
+};
+
+ /* The time of emulation pio access is from kvm_pio to kvm_entry. */
+static void ioport_event_get_key(struct perf_evsel *evsel,
+				 struct perf_sample *sample,
+				 struct event_key *key)
+{
+	key->key  = perf_evsel__intval(evsel, sample, "port");
+	key->info = perf_evsel__intval(evsel, sample, "rw");
+}
+
+static bool ioport_event_begin(struct perf_evsel *evsel,
+			       struct perf_sample *sample,
+			       struct event_key *key)
+{
+	if (!strcmp(evsel->name, "kvm:kvm_pio")) {
+		ioport_event_get_key(evsel, sample, key);
+		return true;
+	}
+
+	return false;
+}
+
+static bool ioport_event_end(struct perf_evsel *evsel,
+			     struct perf_sample *sample __maybe_unused,
+			     struct event_key *key __maybe_unused)
+{
+	return kvm_entry_event(evsel);
+}
+
+static void ioport_event_decode_key(struct perf_kvm *kvm __maybe_unused,
+				    struct event_key *key,
+				    char decode[20])
+{
+	scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key,
+				key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+	.is_begin_event = ioport_event_begin,
+	.is_end_event = ioport_event_end,
+	.decode_key = ioport_event_decode_key,
+	.name = "IO Port Access"
+};
+
+static bool register_kvm_events_ops(struct perf_kvm *kvm)
+{
+	bool ret = true;
+
+	if (!strcmp(kvm->report_event, "vmexit"))
+		kvm->events_ops = &exit_events;
+	else if (!strcmp(kvm->report_event, "mmio"))
+		kvm->events_ops = &mmio_events;
+	else if (!strcmp(kvm->report_event, "ioport"))
+		kvm->events_ops = &ioport_events;
+	else {
+		pr_err("Unknown report event:%s\n", kvm->report_event);
+		ret = false;
+	}
+
+	return ret;
+}
+
+struct vcpu_event_record {
+	int vcpu_id;
+	u64 start_time;
+	struct kvm_event *last_event;
+};
+
+
+static void init_kvm_event_record(struct perf_kvm *kvm)
+{
+	int i;
+
+	for (i = 0; i < (int)EVENTS_CACHE_SIZE; i++)
+		INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
+}
+
+static int kvm_events_hash_fn(u64 key)
+{
+	return key & (EVENTS_CACHE_SIZE - 1);
+}
+
+static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
+{
+	int old_max_vcpu = event->max_vcpu;
+
+	if (vcpu_id < event->max_vcpu)
+		return true;
+
+	while (event->max_vcpu <= vcpu_id)
+		event->max_vcpu += DEFAULT_VCPU_NUM;
+
+	event->vcpu = realloc(event->vcpu,
+			      event->max_vcpu * sizeof(*event->vcpu));
+	if (!event->vcpu) {
+		pr_err("Not enough memory\n");
+		return false;
+	}
+
+	memset(event->vcpu + old_max_vcpu, 0,
+	       (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
+	return true;
+}
+
+static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
+{
+	struct kvm_event *event;
+
+	event = zalloc(sizeof(*event));
+	if (!event) {
+		pr_err("Not enough memory\n");
+		return NULL;
+	}
+
+	event->key = *key;
+	return event;
+}
+
+static struct kvm_event *find_create_kvm_event(struct perf_kvm *kvm,
+					       struct event_key *key)
+{
+	struct kvm_event *event;
+	struct list_head *head;
+
+	BUG_ON(key->key == INVALID_KEY);
+
+	head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
+	list_for_each_entry(event, head, hash_entry)
+		if (event->key.key == key->key && event->key.info == key->info)
+			return event;
+
+	event = kvm_alloc_init_event(key);
+	if (!event)
+		return NULL;
+
+	list_add(&event->hash_entry, head);
+	return event;
+}
+
+static bool handle_begin_event(struct perf_kvm *kvm,
+			       struct vcpu_event_record *vcpu_record,
+			       struct event_key *key, u64 timestamp)
+{
+	struct kvm_event *event = NULL;
+
+	if (key->key != INVALID_KEY)
+		event = find_create_kvm_event(kvm, key);
+
+	vcpu_record->last_event = event;
+	vcpu_record->start_time = timestamp;
+	return true;
+}
+
+static void
+kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
+{
+	kvm_stats->time += time_diff;
+	update_stats(&kvm_stats->stats, time_diff);
+}
+
+static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
+{
+	struct kvm_event_stats *kvm_stats = &event->total;
+
+	if (vcpu_id != -1)
+		kvm_stats = &event->vcpu[vcpu_id];
+
+	return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
+				avg_stats(&kvm_stats->stats));
+}
+
+static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
+			     u64 time_diff)
+{
+	kvm_update_event_stats(&event->total, time_diff);
+
+	if (!kvm_event_expand(event, vcpu_id))
+		return false;
+
+	kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
+	return true;
+}
+
+static bool handle_end_event(struct perf_kvm *kvm,
+			     struct vcpu_event_record *vcpu_record,
+			     struct event_key *key,
+			     u64 timestamp)
+{
+	struct kvm_event *event;
+	u64 time_begin, time_diff;
+
+	event = vcpu_record->last_event;
+	time_begin = vcpu_record->start_time;
 
-static const char * const kvm_usage[] = {
-	"perf kvm [<options>] {top|record|report|diff|buildid-list}",
-	NULL
+	/* The begin event is not caught. */
+	if (!time_begin)
+		return true;
+
+	/*
+	 * In some case, the 'begin event' only records the start timestamp,
+	 * the actual event is recognized in the 'end event' (e.g. mmio-event).
+	 */
+
+	/* Both begin and end events did not get the key. */
+	if (!event && key->key == INVALID_KEY)
+		return true;
+
+	if (!event)
+		event = find_create_kvm_event(kvm, key);
+
+	if (!event)
+		return false;
+
+	vcpu_record->last_event = NULL;
+	vcpu_record->start_time = 0;
+
+	BUG_ON(timestamp < time_begin);
+
+	time_diff = timestamp - time_begin;
+	return update_kvm_event(event, vcpu_record->vcpu_id, time_diff);
+}
+
+static
+struct vcpu_event_record *per_vcpu_record(struct thread *thread,
+					  struct perf_evsel *evsel,
+					  struct perf_sample *sample)
+{
+	/* Only kvm_entry records vcpu id. */
+	if (!thread->priv && kvm_entry_event(evsel)) {
+		struct vcpu_event_record *vcpu_record;
+
+		vcpu_record = zalloc(sizeof(*vcpu_record));
+		if (!vcpu_record) {
+			pr_err("%s: Not enough memory\n", __func__);
+			return NULL;
+		}
+
+		vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, "vcpu_id");
+		thread->priv = vcpu_record;
+	}
+
+	return thread->priv;
+}
+
+static bool handle_kvm_event(struct perf_kvm *kvm,
+			     struct thread *thread,
+			     struct perf_evsel *evsel,
+			     struct perf_sample *sample)
+{
+	struct vcpu_event_record *vcpu_record;
+	struct event_key key = {.key = INVALID_KEY};
+
+	vcpu_record = per_vcpu_record(thread, evsel, sample);
+	if (!vcpu_record)
+		return true;
+
+	if (kvm->events_ops->is_begin_event(evsel, sample, &key))
+		return handle_begin_event(kvm, vcpu_record, &key, sample->time);
+
+	if (kvm->events_ops->is_end_event(evsel, sample, &key))
+		return handle_end_event(kvm, vcpu_record, &key, sample->time);
+
+	return true;
+}
+
+#define GET_EVENT_KEY(func, field)					\
+static u64 get_event_ ##func(struct kvm_event *event, int vcpu)		\
+{									\
+	if (vcpu == -1)							\
+		return event->total.field;				\
+									\
+	if (vcpu >= event->max_vcpu)					\
+		return 0;						\
+									\
+	return event->vcpu[vcpu].field;					\
+}
+
+#define COMPARE_EVENT_KEY(func, field)					\
+GET_EVENT_KEY(func, field)						\
+static int compare_kvm_event_ ## func(struct kvm_event *one,		\
+					struct kvm_event *two, int vcpu)\
+{									\
+	return get_event_ ##func(one, vcpu) >				\
+				get_event_ ##func(two, vcpu);		\
+}
+
+GET_EVENT_KEY(time, time);
+COMPARE_EVENT_KEY(count, stats.n);
+COMPARE_EVENT_KEY(mean, stats.mean);
+
+#define DEF_SORT_NAME_KEY(name, compare_key)				\
+	{ #name, compare_kvm_event_ ## compare_key }
+
+static struct kvm_event_key keys[] = {
+	DEF_SORT_NAME_KEY(sample, count),
+	DEF_SORT_NAME_KEY(time, mean),
+	{ NULL, NULL }
 };
 
-static const struct option kvm_options[] = {
-	OPT_STRING('i', "input", &file_name, "file",
-		   "Input file name"),
-	OPT_STRING('o', "output", &file_name, "file",
-		   "Output file name"),
-	OPT_BOOLEAN(0, "guest", &perf_guest,
-		    "Collect guest os data"),
-	OPT_BOOLEAN(0, "host", &perf_host,
-		    "Collect host os data"),
-	OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
-		   "guest mount directory under which every guest os"
-		   " instance has a subdir"),
-	OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
-		   "file", "file saving guest os vmlinux"),
-	OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
-		   "file", "file saving guest os /proc/kallsyms"),
-	OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
-		   "file", "file saving guest os /proc/modules"),
-	OPT_END()
+static bool select_key(struct perf_kvm *kvm)
+{
+	int i;
+
+	for (i = 0; keys[i].name; i++) {
+		if (!strcmp(keys[i].name, kvm->sort_key)) {
+			kvm->compare = keys[i].key;
+			return true;
+		}
+	}
+
+	pr_err("Unknown compare key:%s\n", kvm->sort_key);
+	return false;
+}
+
+static void insert_to_result(struct rb_root *result, struct kvm_event *event,
+			     key_cmp_fun bigger, int vcpu)
+{
+	struct rb_node **rb = &result->rb_node;
+	struct rb_node *parent = NULL;
+	struct kvm_event *p;
+
+	while (*rb) {
+		p = container_of(*rb, struct kvm_event, rb);
+		parent = *rb;
+
+		if (bigger(event, p, vcpu))
+			rb = &(*rb)->rb_left;
+		else
+			rb = &(*rb)->rb_right;
+	}
+
+	rb_link_node(&event->rb, parent, rb);
+	rb_insert_color(&event->rb, result);
+}
+
+static void update_total_count(struct perf_kvm *kvm, struct kvm_event *event)
+{
+	int vcpu = kvm->trace_vcpu;
+
+	kvm->total_count += get_event_count(event, vcpu);
+	kvm->total_time += get_event_time(event, vcpu);
+}
+
+static bool event_is_valid(struct kvm_event *event, int vcpu)
+{
+	return !!get_event_count(event, vcpu);
+}
+
+static void sort_result(struct perf_kvm *kvm)
+{
+	unsigned int i;
+	int vcpu = kvm->trace_vcpu;
+	struct kvm_event *event;
+
+	for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+		list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry)
+			if (event_is_valid(event, vcpu)) {
+				update_total_count(kvm, event);
+				insert_to_result(&kvm->result, event,
+						 kvm->compare, vcpu);
+			}
+}
+
+/* returns left most element of result, and erase it */
+static struct kvm_event *pop_from_result(struct rb_root *result)
+{
+	struct rb_node *node = rb_first(result);
+
+	if (!node)
+		return NULL;
+
+	rb_erase(node, result);
+	return container_of(node, struct kvm_event, rb);
+}
+
+static void print_vcpu_info(int vcpu)
+{
+	pr_info("Analyze events for ");
+
+	if (vcpu == -1)
+		pr_info("all VCPUs:\n\n");
+	else
+		pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void print_result(struct perf_kvm *kvm)
+{
+	char decode[20];
+	struct kvm_event *event;
+	int vcpu = kvm->trace_vcpu;
+
+	pr_info("\n\n");
+	print_vcpu_info(vcpu);
+	pr_info("%20s ", kvm->events_ops->name);
+	pr_info("%10s ", "Samples");
+	pr_info("%9s ", "Samples%");
+
+	pr_info("%9s ", "Time%");
+	pr_info("%16s ", "Avg time");
+	pr_info("\n\n");
+
+	while ((event = pop_from_result(&kvm->result))) {
+		u64 ecount, etime;
+
+		ecount = get_event_count(event, vcpu);
+		etime = get_event_time(event, vcpu);
+
+		kvm->events_ops->decode_key(kvm, &event->key, decode);
+		pr_info("%20s ", decode);
+		pr_info("%10llu ", (unsigned long long)ecount);
+		pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
+		pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
+		pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
+			kvm_event_rel_stddev(vcpu, event));
+		pr_info("\n");
+	}
+
+	pr_info("\nTotal Samples:%lld, Total events handled time:%.2fus.\n\n",
+		(unsigned long long)kvm->total_count, kvm->total_time / 1e3);
+}
+
+static int process_sample_event(struct perf_tool *tool,
+				union perf_event *event,
+				struct perf_sample *sample,
+				struct perf_evsel *evsel,
+				struct machine *machine)
+{
+	struct thread *thread = machine__findnew_thread(machine, sample->tid);
+	struct perf_kvm *kvm = container_of(tool, struct perf_kvm, tool);
+
+	if (thread == NULL) {
+		pr_debug("problem processing %d event, skipping it.\n",
+			event->header.type);
+		return -1;
+	}
+
+	if (!handle_kvm_event(kvm, thread, evsel, sample))
+		return -1;
+
+	return 0;
+}
+
+static int get_cpu_isa(struct perf_session *session)
+{
+	char *cpuid = session->header.env.cpuid;
+	int isa;
+
+	if (strstr(cpuid, "Intel"))
+		isa = 1;
+	else if (strstr(cpuid, "AMD"))
+		isa = 0;
+	else {
+		pr_err("CPU %s is not supported.\n", cpuid);
+		isa = -ENOTSUP;
+	}
+
+	return isa;
+}
+
+static int read_events(struct perf_kvm *kvm)
+{
+	int ret;
+
+	struct perf_tool eops = {
+		.sample			= process_sample_event,
+		.comm			= perf_event__process_comm,
+		.ordered_samples	= true,
+	};
+
+	kvm->tool = eops;
+	kvm->session = perf_session__new(kvm->file_name, O_RDONLY, 0, false,
+					 &kvm->tool);
+	if (!kvm->session) {
+		pr_err("Initializing perf session failed\n");
+		return -EINVAL;
+	}
+
+	if (!perf_session__has_traces(kvm->session, "kvm record"))
+		return -EINVAL;
+
+	/*
+	 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
+	 * traced in the old kernel.
+	 */
+	ret = get_cpu_isa(kvm->session);
+
+	if (ret < 0)
+		return ret;
+
+	if (ret == 1) {
+		kvm->exit_reasons = vmx_exit_reasons;
+		kvm->exit_reasons_size = ARRAY_SIZE(vmx_exit_reasons);
+		kvm->exit_reasons_isa = "VMX";
+	}
+
+	return perf_session__process_events(kvm->session, &kvm->tool);
+}
+
+static bool verify_vcpu(int vcpu)
+{
+	if (vcpu != -1 && vcpu < 0) {
+		pr_err("Invalid vcpu:%d.\n", vcpu);
+		return false;
+	}
+
+	return true;
+}
+
+static int kvm_events_report_vcpu(struct perf_kvm *kvm)
+{
+	int ret = -EINVAL;
+	int vcpu = kvm->trace_vcpu;
+
+	if (!verify_vcpu(vcpu))
+		goto exit;
+
+	if (!select_key(kvm))
+		goto exit;
+
+	if (!register_kvm_events_ops(kvm))
+		goto exit;
+
+	init_kvm_event_record(kvm);
+	setup_pager();
+
+	ret = read_events(kvm);
+	if (ret)
+		goto exit;
+
+	sort_result(kvm);
+	print_result(kvm);
+
+exit:
+	return ret;
+}
+
+static const char * const record_args[] = {
+	"record",
+	"-R",
+	"-f",
+	"-m", "1024",
+	"-c", "1",
+	"-e", "kvm:kvm_entry",
+	"-e", "kvm:kvm_exit",
+	"-e", "kvm:kvm_mmio",
+	"-e", "kvm:kvm_pio",
 };
 
-static int __cmd_record(int argc, const char **argv)
+#define STRDUP_FAIL_EXIT(s)		\
+	({	char *_p;		\
+	_p = strdup(s);		\
+		if (!_p)		\
+			return -ENOMEM;	\
+		_p;			\
+	})
+
+static int kvm_events_record(struct perf_kvm *kvm, int argc, const char **argv)
+{
+	unsigned int rec_argc, i, j;
+	const char **rec_argv;
+
+	rec_argc = ARRAY_SIZE(record_args) + argc + 2;
+	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+	if (rec_argv == NULL)
+		return -ENOMEM;
+
+	for (i = 0; i < ARRAY_SIZE(record_args); i++)
+		rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
+
+	rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
+	rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
+
+	for (j = 1; j < (unsigned int)argc; j++, i++)
+		rec_argv[i] = argv[j];
+
+	return cmd_record(i, rec_argv, NULL);
+}
+
+static int kvm_events_report(struct perf_kvm *kvm, int argc, const char **argv)
+{
+	const struct option kvm_events_report_options[] = {
+		OPT_STRING(0, "event", &kvm->report_event, "report event",
+			    "event for reporting: vmexit, mmio, ioport"),
+		OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
+			    "vcpu id to report"),
+		OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
+			    "key for sorting: sample(sort by samples number)"
+			    " time (sort by avg time)"),
+		OPT_END()
+	};
+
+	const char * const kvm_events_report_usage[] = {
+		"perf kvm stat report [<options>]",
+		NULL
+	};
+
+	symbol__init();
+
+	if (argc) {
+		argc = parse_options(argc, argv,
+				     kvm_events_report_options,
+				     kvm_events_report_usage, 0);
+		if (argc)
+			usage_with_options(kvm_events_report_usage,
+					   kvm_events_report_options);
+	}
+
+	return kvm_events_report_vcpu(kvm);
+}
+
+static void print_kvm_stat_usage(void)
+{
+	printf("Usage: perf kvm stat <command>\n\n");
+
+	printf("# Available commands:\n");
+	printf("\trecord: record kvm events\n");
+	printf("\treport: report statistical data of kvm events\n");
+
+	printf("\nOtherwise, it is the alias of 'perf stat':\n");
+}
+
+static int kvm_cmd_stat(struct perf_kvm *kvm, int argc, const char **argv)
+{
+	if (argc == 1) {
+		print_kvm_stat_usage();
+		goto perf_stat;
+	}
+
+	if (!strncmp(argv[1], "rec", 3))
+		return kvm_events_record(kvm, argc - 1, argv + 1);
+
+	if (!strncmp(argv[1], "rep", 3))
+		return kvm_events_report(kvm, argc - 1 , argv + 1);
+
+perf_stat:
+	return cmd_stat(argc, argv, NULL);
+}
+
+static int __cmd_record(struct perf_kvm *kvm, int argc, const char **argv)
 {
 	int rec_argc, i = 0, j;
 	const char **rec_argv;
@@ -57,7 +890,7 @@ static int __cmd_record(int argc, const char **argv)
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	rec_argv[i++] = strdup("record");
 	rec_argv[i++] = strdup("-o");
-	rec_argv[i++] = strdup(file_name);
+	rec_argv[i++] = strdup(kvm->file_name);
 	for (j = 1; j < argc; j++, i++)
 		rec_argv[i] = argv[j];
 
@@ -66,7 +899,7 @@ static int __cmd_record(int argc, const char **argv)
 	return cmd_record(i, rec_argv, NULL);
 }
 
-static int __cmd_report(int argc, const char **argv)
+static int __cmd_report(struct perf_kvm *kvm, int argc, const char **argv)
 {
 	int rec_argc, i = 0, j;
 	const char **rec_argv;
@@ -75,7 +908,7 @@ static int __cmd_report(int argc, const char **argv)
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	rec_argv[i++] = strdup("report");
 	rec_argv[i++] = strdup("-i");
-	rec_argv[i++] = strdup(file_name);
+	rec_argv[i++] = strdup(kvm->file_name);
 	for (j = 1; j < argc; j++, i++)
 		rec_argv[i] = argv[j];
 
@@ -84,7 +917,7 @@ static int __cmd_report(int argc, const char **argv)
 	return cmd_report(i, rec_argv, NULL);
 }
 
-static int __cmd_buildid_list(int argc, const char **argv)
+static int __cmd_buildid_list(struct perf_kvm *kvm, int argc, const char **argv)
 {
 	int rec_argc, i = 0, j;
 	const char **rec_argv;
@@ -93,7 +926,7 @@ static int __cmd_buildid_list(int argc, const char **argv)
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	rec_argv[i++] = strdup("buildid-list");
 	rec_argv[i++] = strdup("-i");
-	rec_argv[i++] = strdup(file_name);
+	rec_argv[i++] = strdup(kvm->file_name);
 	for (j = 1; j < argc; j++, i++)
 		rec_argv[i] = argv[j];
 
@@ -102,8 +935,45 @@ static int __cmd_buildid_list(int argc, const char **argv)
 	return cmd_buildid_list(i, rec_argv, NULL);
 }
 
-int cmd_kvm(int argc, const char **argv, const char *prefix __used)
+int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
 {
+	struct perf_kvm kvm = {
+		.trace_vcpu	= -1,
+		.report_event	= "vmexit",
+		.sort_key	= "sample",
+
+		.exit_reasons = svm_exit_reasons,
+		.exit_reasons_size = ARRAY_SIZE(svm_exit_reasons),
+		.exit_reasons_isa = "SVM",
+	};
+
+	const struct option kvm_options[] = {
+		OPT_STRING('i', "input", &kvm.file_name, "file",
+			   "Input file name"),
+		OPT_STRING('o', "output", &kvm.file_name, "file",
+			   "Output file name"),
+		OPT_BOOLEAN(0, "guest", &perf_guest,
+			    "Collect guest os data"),
+		OPT_BOOLEAN(0, "host", &perf_host,
+			    "Collect host os data"),
+		OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
+			   "guest mount directory under which every guest os"
+			   " instance has a subdir"),
+		OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
+			   "file", "file saving guest os vmlinux"),
+		OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
+			   "file", "file saving guest os /proc/kallsyms"),
+		OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
+			   "file", "file saving guest os /proc/modules"),
+		OPT_END()
+	};
+
+
+	const char * const kvm_usage[] = {
+		"perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
+		NULL
+	};
+
 	perf_host  = 0;
 	perf_guest = 1;
 
@@ -115,26 +985,32 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __used)
 	if (!perf_host)
 		perf_guest = 1;
 
-	if (!file_name) {
+	if (!kvm.file_name) {
 		if (perf_host && !perf_guest)
-			sprintf(name_buffer, "perf.data.host");
+			kvm.file_name = strdup("perf.data.host");
 		else if (!perf_host && perf_guest)
-			sprintf(name_buffer, "perf.data.guest");
+			kvm.file_name = strdup("perf.data.guest");
 		else
-			sprintf(name_buffer, "perf.data.kvm");
-		file_name = name_buffer;
+			kvm.file_name = strdup("perf.data.kvm");
+
+		if (!kvm.file_name) {
+			pr_err("Failed to allocate memory for filename\n");
+			return -ENOMEM;
+		}
 	}
 
 	if (!strncmp(argv[0], "rec", 3))
-		return __cmd_record(argc, argv);
+		return __cmd_record(&kvm, argc, argv);
 	else if (!strncmp(argv[0], "rep", 3))
-		return __cmd_report(argc, argv);
+		return __cmd_report(&kvm, argc, argv);
 	else if (!strncmp(argv[0], "diff", 4))
 		return cmd_diff(argc, argv, NULL);
 	else if (!strncmp(argv[0], "top", 3))
 		return cmd_top(argc, argv, NULL);
 	else if (!strncmp(argv[0], "buildid-list", 12))
-		return __cmd_buildid_list(argc, argv);
+		return __cmd_buildid_list(&kvm, argc, argv);
+	else if (!strncmp(argv[0], "stat", 4))
+		return kvm_cmd_stat(&kvm, argc, argv);
 	else
 		usage_with_options(kvm_usage, kvm_options);