Commit f1c3656c authored Jan 17, 2020 by Hangbin Liu Committed by Daniel Borkmann Jan 20, 2020

selftests/bpf: Skip perf hw events test if the setup disabled it



The same with commit 4e59afbb ("selftests/bpf: skip nmi test when perf
hw events are disabled"), it would make more sense to skip the
test_stacktrace_build_id_nmi test if the setup (e.g. virtual machines) has
disabled hardware perf events.

Fixes: 13790d1c ("bpf: add selftest for stackmap with build_id in NMI context")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200117100656.10359-1-liuhangbin@gmail.com

parent 396b83fa

tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -49,8 +49,12 @@ retry:
		pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
		0 /* cpu 0 /, -1 / group id */,
		0 /* flags */);
		if (CHECK(pmu_fd < 0, "perf_event_open",
		"err %d errno %d. Does the test host support PERF_COUNT_HW_CPU_CYCLES?\n",
		if (pmu_fd < 0 && errno == ENOENT) {
		printf("%s:SKIP:no PERF_COUNT_HW_CPU_CYCLES\n", __func__);
		test__skip();
		goto cleanup;
		}
		if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
		pmu_fd, errno))
		goto cleanup;

Admin message