diff options
| author | Song Liu <songliubraving@fb.com> | 2020-02-14 15:41:46 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-02-18 16:08:27 +0100 |
| commit | b80b033bedae68dae8fc703ab8a69811ce678f2e (patch) | |
| tree | 58d2c30ae0127f991c0e2caf06edb38b38c97dc7 /kernel/trace/bpf_trace.c | |
| parent | b182a66792feb706c62e50c31db8546ca4ff168e (diff) | |
| download | lwn-b80b033bedae68dae8fc703ab8a69811ce678f2e.tar.gz lwn-b80b033bedae68dae8fc703ab8a69811ce678f2e.zip | |
bpf: Allow bpf_perf_event_read_value in all BPF programs
bpf_perf_event_read_value() is NMI safe. Enable it for all BPF programs.
This can be used in fentry/fexit to profile BPF program and individual
kernel function with hardware counters.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200214234146.2910011-1-songliubraving@fb.com
Diffstat (limited to 'kernel/trace/bpf_trace.c')
| -rw-r--r-- | kernel/trace/bpf_trace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 19e793aa441a..4ddd5ac46094 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -843,6 +843,8 @@ tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_send_signal_proto; case BPF_FUNC_send_signal_thread: return &bpf_send_signal_thread_proto; + case BPF_FUNC_perf_event_read_value: + return &bpf_perf_event_read_value_proto; default: return NULL; } @@ -858,8 +860,6 @@ kprobe_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_get_stackid_proto; case BPF_FUNC_get_stack: return &bpf_get_stack_proto; - case BPF_FUNC_perf_event_read_value: - return &bpf_perf_event_read_value_proto; #ifdef CONFIG_BPF_KPROBE_OVERRIDE case BPF_FUNC_override_return: return &bpf_override_return_proto; |