selftests/bpf: Skip test when perf_event_open returns EOPNOTSUPP

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When testing send_signal and stacktrace_build_id_nmi using the riscv sbi
pmu driver without the sscofpmf extension or the riscv legacy pmu driver,
then failures as follows are encountered:

    test_send_signal_common:FAIL:perf_event_open unexpected perf_event_open: actual -1 < expected 0
    #272/3   send_signal/send_signal_nmi:FAIL

    test_stacktrace_build_id_nmi:FAIL:perf_event_open err -1 errno 95
    #304     stacktrace_build_id_nmi:FAIL

The reason is that the above pmu driver or hardware does not support
sampling events, that is, PERF_PMU_CAP_NO_INTERRUPT is set to pmu
capabilities, and then perf_event_open returns EOPNOTSUPP. Since
PERF_PMU_CAP_NO_INTERRUPT is not only set in the riscv-related pmu driver,
it is better to skip testing when this capability is set.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240402073029.1299085-1-pulehui@huaweicloud.com

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Pu Lehui 2024-04-02 07:30:29 +00:00 • committed by Daniel Borkmann

parent 2a24e24857

commit c186ed12a8

2 changed files with 2 additions and 2 deletions

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2

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

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2

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

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