v4.19.13 snapshot.
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
new file mode 100644
index 0000000..2b1ef70
--- /dev/null
+++ b/tools/perf/builtin-kvm.c
@@ -0,0 +1,1640 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "builtin.h"
+#include "perf.h"
+
+#include "util/evsel.h"
+#include "util/evlist.h"
+#include "util/term.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/intlist.h"
+#include <subcmd/parse-options.h>
+#include "util/trace-event.h"
+#include "util/debug.h"
+#include "util/tool.h"
+#include "util/stat.h"
+#include "util/top.h"
+#include "util/data.h"
+#include "util/ordered-events.h"
+
+#include <sys/prctl.h>
+#ifdef HAVE_TIMERFD_SUPPORT
+#include <sys/timerfd.h>
+#endif
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <linux/kernel.h>
+#include <linux/time64.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <poll.h>
+#include <termios.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <math.h>
+
+static const char *get_filename_for_perf_kvm(void)
+{
+ const char *filename;
+
+ if (perf_host && !perf_guest)
+ filename = strdup("perf.data.host");
+ else if (!perf_host && perf_guest)
+ filename = strdup("perf.data.guest");
+ else
+ filename = strdup("perf.data.kvm");
+
+ return filename;
+}
+
+#ifdef HAVE_KVM_STAT_SUPPORT
+#include "util/kvm-stat.h"
+
+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, kvm_exit_reason);
+}
+
+bool kvm_exit_event(struct perf_evsel *evsel)
+{
+ return !strcmp(evsel->name, kvm_exit_trace);
+}
+
+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;
+}
+
+bool kvm_entry_event(struct perf_evsel *evsel)
+{
+ return !strcmp(evsel->name, kvm_entry_trace);
+}
+
+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 const char *get_exit_reason(struct perf_kvm_stat *kvm,
+ struct exit_reasons_table *tbl,
+ u64 exit_code)
+{
+ while (tbl->reason != NULL) {
+ 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";
+}
+
+void exit_event_decode_key(struct perf_kvm_stat *kvm,
+ struct event_key *key,
+ char *decode)
+{
+ const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
+ key->key);
+
+ scnprintf(decode, decode_str_len, "%s", exit_reason);
+}
+
+static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
+{
+ struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
+
+ for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
+ if (!strcmp(events_ops->name, kvm->report_event)) {
+ kvm->events_ops = events_ops->ops;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+struct vcpu_event_record {
+ int vcpu_id;
+ u64 start_time;
+ struct kvm_event *last_event;
+};
+
+
+static void init_kvm_event_record(struct perf_kvm_stat *kvm)
+{
+ unsigned int i;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+ INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static void clear_events_cache_stats(struct list_head *kvm_events_cache)
+{
+ struct list_head *head;
+ struct kvm_event *event;
+ unsigned int i;
+ int j;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
+ head = &kvm_events_cache[i];
+ list_for_each_entry(event, head, hash_entry) {
+ /* reset stats for event */
+ event->total.time = 0;
+ init_stats(&event->total.stats);
+
+ for (j = 0; j < event->max_vcpu; ++j) {
+ event->vcpu[j].time = 0;
+ init_stats(&event->vcpu[j].stats);
+ }
+ }
+ }
+}
+#endif
+
+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;
+ void *prev;
+
+ if (vcpu_id < event->max_vcpu)
+ return true;
+
+ while (event->max_vcpu <= vcpu_id)
+ event->max_vcpu += DEFAULT_VCPU_NUM;
+
+ prev = event->vcpu;
+ event->vcpu = realloc(event->vcpu,
+ event->max_vcpu * sizeof(*event->vcpu));
+ if (!event->vcpu) {
+ free(prev);
+ 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;
+ init_stats(&event->total.stats);
+ return event;
+}
+
+static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *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_stat *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)
+{
+ if (vcpu_id == -1) {
+ kvm_update_event_stats(&event->total, time_diff);
+ return true;
+ }
+
+ if (!kvm_event_expand(event, vcpu_id))
+ return false;
+
+ kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
+ return true;
+}
+
+static bool is_child_event(struct perf_kvm_stat *kvm,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ struct child_event_ops *child_ops;
+
+ child_ops = kvm->events_ops->child_ops;
+
+ if (!child_ops)
+ return false;
+
+ for (; child_ops->name; child_ops++) {
+ if (!strcmp(evsel->name, child_ops->name)) {
+ child_ops->get_key(evsel, sample, key);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool handle_child_event(struct perf_kvm_stat *kvm,
+ struct vcpu_event_record *vcpu_record,
+ struct event_key *key,
+ struct perf_sample *sample __maybe_unused)
+{
+ struct kvm_event *event = NULL;
+
+ if (key->key != INVALID_KEY)
+ event = find_create_kvm_event(kvm, key);
+
+ vcpu_record->last_event = event;
+
+ return true;
+}
+
+static bool skip_event(const char *event)
+{
+ const char * const *skip_events;
+
+ for (skip_events = kvm_skip_events; *skip_events; skip_events++)
+ if (!strcmp(event, *skip_events))
+ return true;
+
+ return false;
+}
+
+static bool handle_end_event(struct perf_kvm_stat *kvm,
+ struct vcpu_event_record *vcpu_record,
+ struct event_key *key,
+ struct perf_sample *sample)
+{
+ struct kvm_event *event;
+ u64 time_begin, time_diff;
+ int vcpu;
+
+ if (kvm->trace_vcpu == -1)
+ vcpu = -1;
+ else
+ vcpu = vcpu_record->vcpu_id;
+
+ event = vcpu_record->last_event;
+ time_begin = vcpu_record->start_time;
+
+ /* 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;
+
+ /* seems to happen once in a while during live mode */
+ if (sample->time < time_begin) {
+ pr_debug("End time before begin time; skipping event.\n");
+ return true;
+ }
+
+ time_diff = sample->time - time_begin;
+
+ if (kvm->duration && time_diff > kvm->duration) {
+ char decode[decode_str_len];
+
+ kvm->events_ops->decode_key(kvm, &event->key, decode);
+ if (!skip_event(decode)) {
+ pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
+ sample->time, sample->pid, vcpu_record->vcpu_id,
+ decode, time_diff / NSEC_PER_USEC);
+ }
+ }
+
+ return update_kvm_event(event, vcpu, 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(thread) && 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_str);
+ thread__set_priv(thread, vcpu_record);
+ }
+
+ return thread__priv(thread);
+}
+
+static bool handle_kvm_event(struct perf_kvm_stat *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,
+ .exit_reasons = kvm->exit_reasons };
+
+ vcpu_record = per_vcpu_record(thread, evsel, sample);
+ if (!vcpu_record)
+ return true;
+
+ /* only process events for vcpus user cares about */
+ if ((kvm->trace_vcpu != -1) &&
+ (kvm->trace_vcpu != vcpu_record->vcpu_id))
+ return true;
+
+ if (kvm->events_ops->is_begin_event(evsel, sample, &key))
+ return handle_begin_event(kvm, vcpu_record, &key, sample->time);
+
+ if (is_child_event(kvm, evsel, sample, &key))
+ return handle_child_event(kvm, vcpu_record, &key, sample);
+
+ if (kvm->events_ops->is_end_event(evsel, sample, &key))
+ return handle_end_event(kvm, vcpu_record, &key, sample);
+
+ 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);
+GET_EVENT_KEY(max, stats.max);
+GET_EVENT_KEY(min, stats.min);
+
+#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 bool select_key(struct perf_kvm_stat *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_stat *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_stat *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(struct perf_kvm_stat *kvm)
+{
+ int vcpu = kvm->trace_vcpu;
+
+ pr_info("Analyze events for ");
+
+ if (kvm->opts.target.system_wide)
+ pr_info("all VMs, ");
+ else if (kvm->opts.target.pid)
+ pr_info("pid(s) %s, ", kvm->opts.target.pid);
+ else
+ pr_info("dazed and confused on what is monitored, ");
+
+ if (vcpu == -1)
+ pr_info("all VCPUs:\n\n");
+ else
+ pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void show_timeofday(void)
+{
+ char date[64];
+ struct timeval tv;
+ struct tm ltime;
+
+ gettimeofday(&tv, NULL);
+ if (localtime_r(&tv.tv_sec, <ime)) {
+ strftime(date, sizeof(date), "%H:%M:%S", <ime);
+ pr_info("%s.%06ld", date, tv.tv_usec);
+ } else
+ pr_info("00:00:00.000000");
+
+ return;
+}
+
+static void print_result(struct perf_kvm_stat *kvm)
+{
+ char decode[decode_str_len];
+ struct kvm_event *event;
+ int vcpu = kvm->trace_vcpu;
+
+ if (kvm->live) {
+ puts(CONSOLE_CLEAR);
+ show_timeofday();
+ }
+
+ pr_info("\n\n");
+ print_vcpu_info(kvm);
+ pr_info("%*s ", decode_str_len, kvm->events_ops->name);
+ pr_info("%10s ", "Samples");
+ pr_info("%9s ", "Samples%");
+
+ pr_info("%9s ", "Time%");
+ pr_info("%11s ", "Min Time");
+ pr_info("%11s ", "Max Time");
+ pr_info("%16s ", "Avg time");
+ pr_info("\n\n");
+
+ while ((event = pop_from_result(&kvm->result))) {
+ u64 ecount, etime, max, min;
+
+ ecount = get_event_count(event, vcpu);
+ etime = get_event_time(event, vcpu);
+ max = get_event_max(event, vcpu);
+ min = get_event_min(event, vcpu);
+
+ kvm->events_ops->decode_key(kvm, &event->key, decode);
+ pr_info("%*s ", decode_str_len, 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 ", (double)min / NSEC_PER_USEC);
+ pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
+ pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
+ kvm_event_rel_stddev(vcpu, event));
+ pr_info("\n");
+ }
+
+ pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
+ kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
+
+ if (kvm->lost_events)
+ pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static int process_lost_event(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
+
+ kvm->lost_events++;
+ return 0;
+}
+#endif
+
+static bool skip_sample(struct perf_kvm_stat *kvm,
+ struct perf_sample *sample)
+{
+ if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
+ return true;
+
+ return false;
+}
+
+static int process_sample_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ int err = 0;
+ struct thread *thread;
+ struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
+ tool);
+
+ if (skip_sample(kvm, sample))
+ return 0;
+
+ thread = machine__findnew_thread(machine, sample->pid, sample->tid);
+ 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))
+ err = -1;
+
+ thread__put(thread);
+ return err;
+}
+
+static int cpu_isa_config(struct perf_kvm_stat *kvm)
+{
+ char buf[64], *cpuid;
+ int err;
+
+ if (kvm->live) {
+ err = get_cpuid(buf, sizeof(buf));
+ if (err != 0) {
+ pr_err("Failed to look up CPU type\n");
+ return err;
+ }
+ cpuid = buf;
+ } else
+ cpuid = kvm->session->header.env.cpuid;
+
+ if (!cpuid) {
+ pr_err("Failed to look up CPU type\n");
+ return -EINVAL;
+ }
+
+ err = cpu_isa_init(kvm, cpuid);
+ if (err == -ENOTSUP)
+ pr_err("CPU %s is not supported.\n", cpuid);
+
+ return err;
+}
+
+static bool verify_vcpu(int vcpu)
+{
+ if (vcpu != -1 && vcpu < 0) {
+ pr_err("Invalid vcpu:%d.\n", vcpu);
+ return false;
+ }
+
+ return true;
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+/* keeping the max events to a modest level to keep
+ * the processing of samples per mmap smooth.
+ */
+#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
+
+static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
+ u64 *mmap_time)
+{
+ struct perf_evlist *evlist = kvm->evlist;
+ union perf_event *event;
+ struct perf_mmap *md;
+ u64 timestamp;
+ s64 n = 0;
+ int err;
+
+ *mmap_time = ULLONG_MAX;
+ md = &evlist->mmap[idx];
+ err = perf_mmap__read_init(md);
+ if (err < 0)
+ return (err == -EAGAIN) ? 0 : -1;
+
+ while ((event = perf_mmap__read_event(md)) != NULL) {
+ err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
+ if (err) {
+ perf_mmap__consume(md);
+ pr_err("Failed to parse sample\n");
+ return -1;
+ }
+
+ err = perf_session__queue_event(kvm->session, event, timestamp, 0);
+ /*
+ * FIXME: Here we can't consume the event, as perf_session__queue_event will
+ * point to it, and it'll get possibly overwritten by the kernel.
+ */
+ perf_mmap__consume(md);
+
+ if (err) {
+ pr_err("Failed to enqueue sample: %d\n", err);
+ return -1;
+ }
+
+ /* save time stamp of our first sample for this mmap */
+ if (n == 0)
+ *mmap_time = timestamp;
+
+ /* limit events per mmap handled all at once */
+ n++;
+ if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
+ break;
+ }
+
+ perf_mmap__read_done(md);
+ return n;
+}
+
+static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
+{
+ int i, err, throttled = 0;
+ s64 n, ntotal = 0;
+ u64 flush_time = ULLONG_MAX, mmap_time;
+
+ for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
+ n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
+ if (n < 0)
+ return -1;
+
+ /* flush time is going to be the minimum of all the individual
+ * mmap times. Essentially, we flush all the samples queued up
+ * from the last pass under our minimal start time -- that leaves
+ * a very small race for samples to come in with a lower timestamp.
+ * The ioctl to return the perf_clock timestamp should close the
+ * race entirely.
+ */
+ if (mmap_time < flush_time)
+ flush_time = mmap_time;
+
+ ntotal += n;
+ if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
+ throttled = 1;
+ }
+
+ /* flush queue after each round in which we processed events */
+ if (ntotal) {
+ struct ordered_events *oe = &kvm->session->ordered_events;
+
+ oe->next_flush = flush_time;
+ err = ordered_events__flush(oe, OE_FLUSH__ROUND);
+ if (err) {
+ if (kvm->lost_events)
+ pr_info("\nLost events: %" PRIu64 "\n\n",
+ kvm->lost_events);
+ return err;
+ }
+ }
+
+ return throttled;
+}
+
+static volatile int done;
+
+static void sig_handler(int sig __maybe_unused)
+{
+ done = 1;
+}
+
+static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
+{
+ struct itimerspec new_value;
+ int rc = -1;
+
+ kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
+ if (kvm->timerfd < 0) {
+ pr_err("timerfd_create failed\n");
+ goto out;
+ }
+
+ new_value.it_value.tv_sec = kvm->display_time;
+ new_value.it_value.tv_nsec = 0;
+ new_value.it_interval.tv_sec = kvm->display_time;
+ new_value.it_interval.tv_nsec = 0;
+
+ if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
+ pr_err("timerfd_settime failed: %d\n", errno);
+ close(kvm->timerfd);
+ goto out;
+ }
+
+ rc = 0;
+out:
+ return rc;
+}
+
+static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
+{
+ uint64_t c;
+ int rc;
+
+ rc = read(kvm->timerfd, &c, sizeof(uint64_t));
+ if (rc < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ pr_err("Failed to read timer fd: %d\n", errno);
+ return -1;
+ }
+
+ if (rc != sizeof(uint64_t)) {
+ pr_err("Error reading timer fd - invalid size returned\n");
+ return -1;
+ }
+
+ if (c != 1)
+ pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
+
+ /* update display */
+ sort_result(kvm);
+ print_result(kvm);
+
+ /* reset counts */
+ clear_events_cache_stats(kvm->kvm_events_cache);
+ kvm->total_count = 0;
+ kvm->total_time = 0;
+ kvm->lost_events = 0;
+
+ return 0;
+}
+
+static int fd_set_nonblock(int fd)
+{
+ long arg = 0;
+
+ arg = fcntl(fd, F_GETFL);
+ if (arg < 0) {
+ pr_err("Failed to get current flags for fd %d\n", fd);
+ return -1;
+ }
+
+ if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
+ pr_err("Failed to set non-block option on fd %d\n", fd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int perf_kvm__handle_stdin(void)
+{
+ int c;
+
+ c = getc(stdin);
+ if (c == 'q')
+ return 1;
+
+ return 0;
+}
+
+static int kvm_events_live_report(struct perf_kvm_stat *kvm)
+{
+ int nr_stdin, ret, err = -EINVAL;
+ struct termios save;
+
+ /* live flag must be set first */
+ kvm->live = true;
+
+ ret = cpu_isa_config(kvm);
+ if (ret < 0)
+ return ret;
+
+ if (!verify_vcpu(kvm->trace_vcpu) ||
+ !select_key(kvm) ||
+ !register_kvm_events_ops(kvm)) {
+ goto out;
+ }
+
+ set_term_quiet_input(&save);
+ init_kvm_event_record(kvm);
+
+ signal(SIGINT, sig_handler);
+ signal(SIGTERM, sig_handler);
+
+ /* add timer fd */
+ if (perf_kvm__timerfd_create(kvm) < 0) {
+ err = -1;
+ goto out;
+ }
+
+ if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
+ goto out;
+
+ nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
+ if (nr_stdin < 0)
+ goto out;
+
+ if (fd_set_nonblock(fileno(stdin)) != 0)
+ goto out;
+
+ /* everything is good - enable the events and process */
+ perf_evlist__enable(kvm->evlist);
+
+ while (!done) {
+ struct fdarray *fda = &kvm->evlist->pollfd;
+ int rc;
+
+ rc = perf_kvm__mmap_read(kvm);
+ if (rc < 0)
+ break;
+
+ err = perf_kvm__handle_timerfd(kvm);
+ if (err)
+ goto out;
+
+ if (fda->entries[nr_stdin].revents & POLLIN)
+ done = perf_kvm__handle_stdin();
+
+ if (!rc && !done)
+ err = fdarray__poll(fda, 100);
+ }
+
+ perf_evlist__disable(kvm->evlist);
+
+ if (err == 0) {
+ sort_result(kvm);
+ print_result(kvm);
+ }
+
+out:
+ if (kvm->timerfd >= 0)
+ close(kvm->timerfd);
+
+ tcsetattr(0, TCSAFLUSH, &save);
+ return err;
+}
+
+static int kvm_live_open_events(struct perf_kvm_stat *kvm)
+{
+ int err, rc = -1;
+ struct perf_evsel *pos;
+ struct perf_evlist *evlist = kvm->evlist;
+ char sbuf[STRERR_BUFSIZE];
+
+ perf_evlist__config(evlist, &kvm->opts, NULL);
+
+ /*
+ * Note: exclude_{guest,host} do not apply here.
+ * This command processes KVM tracepoints from host only
+ */
+ evlist__for_each_entry(evlist, pos) {
+ struct perf_event_attr *attr = &pos->attr;
+
+ /* make sure these *are* set */
+ perf_evsel__set_sample_bit(pos, TID);
+ perf_evsel__set_sample_bit(pos, TIME);
+ perf_evsel__set_sample_bit(pos, CPU);
+ perf_evsel__set_sample_bit(pos, RAW);
+ /* make sure these are *not*; want as small a sample as possible */
+ perf_evsel__reset_sample_bit(pos, PERIOD);
+ perf_evsel__reset_sample_bit(pos, IP);
+ perf_evsel__reset_sample_bit(pos, CALLCHAIN);
+ perf_evsel__reset_sample_bit(pos, ADDR);
+ perf_evsel__reset_sample_bit(pos, READ);
+ attr->mmap = 0;
+ attr->comm = 0;
+ attr->task = 0;
+
+ attr->sample_period = 1;
+
+ attr->watermark = 0;
+ attr->wakeup_events = 1000;
+
+ /* will enable all once we are ready */
+ attr->disabled = 1;
+ }
+
+ err = perf_evlist__open(evlist);
+ if (err < 0) {
+ printf("Couldn't create the events: %s\n",
+ str_error_r(errno, sbuf, sizeof(sbuf)));
+ goto out;
+ }
+
+ if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
+ ui__error("Failed to mmap the events: %s\n",
+ str_error_r(errno, sbuf, sizeof(sbuf)));
+ perf_evlist__close(evlist);
+ goto out;
+ }
+
+ rc = 0;
+
+out:
+ return rc;
+}
+#endif
+
+static int read_events(struct perf_kvm_stat *kvm)
+{
+ int ret;
+
+ struct perf_tool eops = {
+ .sample = process_sample_event,
+ .comm = perf_event__process_comm,
+ .namespaces = perf_event__process_namespaces,
+ .ordered_events = true,
+ };
+ struct perf_data file = {
+ .file = {
+ .path = kvm->file_name,
+ },
+ .mode = PERF_DATA_MODE_READ,
+ .force = kvm->force,
+ };
+
+ kvm->tool = eops;
+ kvm->session = perf_session__new(&file, false, &kvm->tool);
+ if (!kvm->session) {
+ pr_err("Initializing perf session failed\n");
+ return -1;
+ }
+
+ symbol__init(&kvm->session->header.env);
+
+ if (!perf_session__has_traces(kvm->session, "kvm record")) {
+ ret = -EINVAL;
+ goto out_delete;
+ }
+
+ /*
+ * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
+ * traced in the old kernel.
+ */
+ ret = cpu_isa_config(kvm);
+ if (ret < 0)
+ goto out_delete;
+
+ ret = perf_session__process_events(kvm->session);
+
+out_delete:
+ perf_session__delete(kvm->session);
+ return ret;
+}
+
+static int parse_target_str(struct perf_kvm_stat *kvm)
+{
+ if (kvm->opts.target.pid) {
+ kvm->pid_list = intlist__new(kvm->opts.target.pid);
+ if (kvm->pid_list == NULL) {
+ pr_err("Error parsing process id string\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
+{
+ int ret = -EINVAL;
+ int vcpu = kvm->trace_vcpu;
+
+ if (parse_target_str(kvm) != 0)
+ goto exit;
+
+ 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;
+}
+
+#define STRDUP_FAIL_EXIT(s) \
+ ({ char *_p; \
+ _p = strdup(s); \
+ if (!_p) \
+ return -ENOMEM; \
+ _p; \
+ })
+
+int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
+{
+ return 0;
+}
+
+static int
+kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j, events_tp_size;
+ const char **rec_argv;
+ const char * const record_args[] = {
+ "record",
+ "-R",
+ "-m", "1024",
+ "-c", "1",
+ };
+ const char * const kvm_stat_record_usage[] = {
+ "perf kvm stat record [<options>]",
+ NULL
+ };
+ const char * const *events_tp;
+ int ret;
+
+ events_tp_size = 0;
+ ret = setup_kvm_events_tp(kvm);
+ if (ret < 0) {
+ pr_err("Unable to setup the kvm tracepoints\n");
+ return ret;
+ }
+
+ for (events_tp = kvm_events_tp; *events_tp; events_tp++)
+ events_tp_size++;
+
+ rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
+ 2 * events_tp_size;
+ 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]);
+
+ for (j = 0; j < events_tp_size; j++) {
+ rec_argv[i++] = "-e";
+ rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
+ }
+
+ 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];
+
+ set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
+ set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
+ set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
+
+ set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
+ set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
+
+ record_usage = kvm_stat_record_usage;
+ return cmd_record(i, rec_argv);
+}
+
+static int
+kvm_events_report(struct perf_kvm_stat *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 (x86 only), ioport (x86 only)"),
+ 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_STRING('p', "pid", &kvm->opts.target.pid, "pid",
+ "analyze events only for given process id(s)"),
+ OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
+ OPT_END()
+ };
+
+ const char * const kvm_events_report_usage[] = {
+ "perf kvm stat report [<options>]",
+ NULL
+ };
+
+ 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);
+ }
+
+ if (!kvm->opts.target.pid)
+ kvm->opts.target.system_wide = true;
+
+ return kvm_events_report_vcpu(kvm);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static struct perf_evlist *kvm_live_event_list(void)
+{
+ struct perf_evlist *evlist;
+ char *tp, *name, *sys;
+ int err = -1;
+ const char * const *events_tp;
+
+ evlist = perf_evlist__new();
+ if (evlist == NULL)
+ return NULL;
+
+ for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
+
+ tp = strdup(*events_tp);
+ if (tp == NULL)
+ goto out;
+
+ /* split tracepoint into subsystem and name */
+ sys = tp;
+ name = strchr(tp, ':');
+ if (name == NULL) {
+ pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
+ *events_tp);
+ free(tp);
+ goto out;
+ }
+ *name = '\0';
+ name++;
+
+ if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
+ pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
+ free(tp);
+ goto out;
+ }
+
+ free(tp);
+ }
+
+ err = 0;
+
+out:
+ if (err) {
+ perf_evlist__delete(evlist);
+ evlist = NULL;
+ }
+
+ return evlist;
+}
+
+static int kvm_events_live(struct perf_kvm_stat *kvm,
+ int argc, const char **argv)
+{
+ char errbuf[BUFSIZ];
+ int err;
+
+ const struct option live_options[] = {
+ OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
+ "record events on existing process id"),
+ OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
+ "number of mmap data pages",
+ perf_evlist__parse_mmap_pages),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_UINTEGER('d', "display", &kvm->display_time,
+ "time in seconds between display updates"),
+ OPT_STRING(0, "event", &kvm->report_event, "report event",
+ "event for reporting: "
+ "vmexit, mmio (x86 only), ioport (x86 only)"),
+ 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_U64(0, "duration", &kvm->duration,
+ "show events other than"
+ " HLT (x86 only) or Wait state (s390 only)"
+ " that take longer than duration usecs"),
+ OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
+ "per thread proc mmap processing timeout in ms"),
+ OPT_END()
+ };
+ const char * const live_usage[] = {
+ "perf kvm stat live [<options>]",
+ NULL
+ };
+ struct perf_data data = {
+ .mode = PERF_DATA_MODE_WRITE,
+ };
+
+
+ /* event handling */
+ kvm->tool.sample = process_sample_event;
+ kvm->tool.comm = perf_event__process_comm;
+ kvm->tool.exit = perf_event__process_exit;
+ kvm->tool.fork = perf_event__process_fork;
+ kvm->tool.lost = process_lost_event;
+ kvm->tool.namespaces = perf_event__process_namespaces;
+ kvm->tool.ordered_events = true;
+ perf_tool__fill_defaults(&kvm->tool);
+
+ /* set defaults */
+ kvm->display_time = 1;
+ kvm->opts.user_interval = 1;
+ kvm->opts.mmap_pages = 512;
+ kvm->opts.target.uses_mmap = false;
+ kvm->opts.target.uid_str = NULL;
+ kvm->opts.target.uid = UINT_MAX;
+ kvm->opts.proc_map_timeout = 500;
+
+ symbol__init(NULL);
+ disable_buildid_cache();
+
+ use_browser = 0;
+
+ if (argc) {
+ argc = parse_options(argc, argv, live_options,
+ live_usage, 0);
+ if (argc)
+ usage_with_options(live_usage, live_options);
+ }
+
+ kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
+
+ /*
+ * target related setups
+ */
+ err = target__validate(&kvm->opts.target);
+ if (err) {
+ target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
+ ui__warning("%s", errbuf);
+ }
+
+ if (target__none(&kvm->opts.target))
+ kvm->opts.target.system_wide = true;
+
+
+ /*
+ * generate the event list
+ */
+ err = setup_kvm_events_tp(kvm);
+ if (err < 0) {
+ pr_err("Unable to setup the kvm tracepoints\n");
+ return err;
+ }
+
+ kvm->evlist = kvm_live_event_list();
+ if (kvm->evlist == NULL) {
+ err = -1;
+ goto out;
+ }
+
+ if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
+ usage_with_options(live_usage, live_options);
+
+ /*
+ * perf session
+ */
+ kvm->session = perf_session__new(&data, false, &kvm->tool);
+ if (kvm->session == NULL) {
+ err = -1;
+ goto out;
+ }
+ kvm->session->evlist = kvm->evlist;
+ perf_session__set_id_hdr_size(kvm->session);
+ ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
+ machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
+ kvm->evlist->threads, false,
+ kvm->opts.proc_map_timeout, 1);
+ err = kvm_live_open_events(kvm);
+ if (err)
+ goto out;
+
+ err = kvm_events_live_report(kvm);
+
+out:
+ perf_session__delete(kvm->session);
+ kvm->session = NULL;
+ perf_evlist__delete(kvm->evlist);
+
+ return err;
+}
+#endif
+
+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("\tlive: live reporting of statistical data of kvm events\n");
+
+ printf("\nOtherwise, it is the alias of 'perf stat':\n");
+}
+
+static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
+{
+ struct perf_kvm_stat kvm = {
+ .file_name = file_name,
+
+ .trace_vcpu = -1,
+ .report_event = "vmexit",
+ .sort_key = "sample",
+
+ };
+
+ 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);
+
+#ifdef HAVE_TIMERFD_SUPPORT
+ if (!strncmp(argv[1], "live", 4))
+ return kvm_events_live(&kvm, argc - 1 , argv + 1);
+#endif
+
+perf_stat:
+ return cmd_stat(argc, argv);
+}
+#endif /* HAVE_KVM_STAT_SUPPORT */
+
+static int __cmd_record(const char *file_name, int argc, const char **argv)
+{
+ int rec_argc, i = 0, j;
+ const char **rec_argv;
+
+ rec_argc = argc + 2;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+ rec_argv[i++] = strdup("record");
+ rec_argv[i++] = strdup("-o");
+ rec_argv[i++] = strdup(file_name);
+ for (j = 1; j < argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_record(i, rec_argv);
+}
+
+static int __cmd_report(const char *file_name, int argc, const char **argv)
+{
+ int rec_argc, i = 0, j;
+ const char **rec_argv;
+
+ rec_argc = argc + 2;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+ rec_argv[i++] = strdup("report");
+ rec_argv[i++] = strdup("-i");
+ rec_argv[i++] = strdup(file_name);
+ for (j = 1; j < argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_report(i, rec_argv);
+}
+
+static int
+__cmd_buildid_list(const char *file_name, int argc, const char **argv)
+{
+ int rec_argc, i = 0, j;
+ const char **rec_argv;
+
+ rec_argc = argc + 2;
+ 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);
+ for (j = 1; j < argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_buildid_list(i, rec_argv);
+}
+
+int cmd_kvm(int argc, const char **argv)
+{
+ const char *file_name = NULL;
+ 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_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+ };
+
+ const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
+ "buildid-list", "stat", NULL };
+ const char *kvm_usage[] = { NULL, NULL };
+
+ perf_host = 0;
+ perf_guest = 1;
+
+ argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(kvm_usage, kvm_options);
+
+ if (!perf_host)
+ perf_guest = 1;
+
+ if (!file_name) {
+ file_name = get_filename_for_perf_kvm();
+
+ if (!file_name) {
+ pr_err("Failed to allocate memory for filename\n");
+ return -ENOMEM;
+ }
+ }
+
+ if (!strncmp(argv[0], "rec", 3))
+ return __cmd_record(file_name, argc, argv);
+ else if (!strncmp(argv[0], "rep", 3))
+ return __cmd_report(file_name, argc, argv);
+ else if (!strncmp(argv[0], "diff", 4))
+ return cmd_diff(argc, argv);
+ else if (!strncmp(argv[0], "top", 3))
+ return cmd_top(argc, argv);
+ else if (!strncmp(argv[0], "buildid-list", 12))
+ return __cmd_buildid_list(file_name, argc, argv);
+#ifdef HAVE_KVM_STAT_SUPPORT
+ else if (!strncmp(argv[0], "stat", 4))
+ return kvm_cmd_stat(file_name, argc, argv);
+#endif
+ else
+ usage_with_options(kvm_usage, kvm_options);
+
+ return 0;
+}