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UPSTREAM: bpf: Enable BPF_PROG_TEST_RUN for raw_tracepoint

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Add .test_run for raw_tracepoint. Also, introduce a new feature that runs
the target program on a specific CPU. This is achieved by a new flag in
bpf_attr.test, BPF_F_TEST_RUN_ON_CPU. When this flag is set, the program
is triggered on cpu with id bpf_attr.test.cpu. This feature is needed for
BPF programs that handle perf_event and other percpu resources, as the
program can access these resource locally.

Change-Id: I81266d3ad6b48e198f30faae2346041efcf7998e
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200925205432.1777-2-songliubraving@fb.com
This commit is contained in:
Song Liu 2020-09-25 13:54:29 -07:00 • committed by basamaryan
commit 4f714eff33
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6 changed files with 110 additions and 1 deletions
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1
kernel/trace/bpf_trace.c
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@ -1561,6 +1561,7 @@ const struct bpf_verifier_ops raw_tracepoint_verifier_ops = {
};
const struct bpf_prog_ops raw_tracepoint_prog_ops = {
.test_run = bpf_prog_test_run_raw_tp,
};
const struct bpf_verifier_ops tracing_verifier_ops = {