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

The same with commit 4e59afbbed ("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: 13790d1cc7 ("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
This commit is contained in:
Hangbin Liu 2020-01-17 18:06:56 +08:00 committed by Daniel Borkmann
parent 396b83fa75
commit f1c3656c6d
1 changed files with 6 additions and 2 deletions
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8
tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c
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@ -49,8 +49,12 @@ void test_stacktrace_build_id_nmi(void)
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;