diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 6f4882f8d61fb2e1f23000c581134f837722712c..87b43188667046c8a676b9bcbb3f2c7c315eb9bc 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -273,6 +273,7 @@ struct perf_evsel *perf_evsel__new_cycles(void)
 	struct perf_event_attr attr = {
 		.type	= PERF_TYPE_HARDWARE,
 		.config	= PERF_COUNT_HW_CPU_CYCLES,
+		.exclude_kernel	= 1,
 	};
 	struct perf_evsel *evsel;
 
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 6d542a4e0648eeabb0cb58eda0cefbfa03d1028a..8aef572d08890b3e051c604a83e99d31abf53778 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -50,7 +50,7 @@ int unwind__prepare_access(struct thread *thread, struct map *map,
 
 	if (!ops) {
 		pr_err("unwind: target platform=%s is not supported\n", arch);
-		return -1;
+		return 0;
 	}
 out_register:
 	unwind__register_ops(thread, ops);