1 files changed, 70 insertions, 0 deletions
diff --git a/tools/perf/util/kvm-stat.c b/tools/perf/util/kvm-stat.c
new file mode 100644
index 000000000000..38ace736db5c
--- /dev/null
+++ b/tools/perf/util/kvm-stat.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "debug.h"
+#include "evsel.h"
+#include "kvm-stat.h"
+
+#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+
+bool kvm_exit_event(struct evsel *evsel)
+{
+	return evsel__name_is(evsel, kvm_exit_trace);
+}
+
+void exit_event_get_key(struct evsel *evsel,
+			struct perf_sample *sample,
+			struct event_key *key)
+{
+	key->info = 0;
+	key->key  = evsel__intval(evsel, sample, kvm_exit_reason);
+}
+
+
+bool exit_event_begin(struct 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 evsel *evsel)
+{
+	return evsel__name_is(evsel, kvm_entry_trace);
+}
+
+bool exit_event_end(struct 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, KVM_EVENT_NAME_LEN, "%s", exit_reason);
+}
+
+#endif