diff options
| author | Alexei Starovoitov <ast@fb.com> | 2016-09-01 18:37:22 -0700 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:50:37 +0300 |
| commit | a71a0208f8be12caa3787df89c19cc6dfa94dcdd (patch) | |
| tree | ebf6346c2876cb875e6893012a251cf695bd83b4 /include/linux/perf_event.h | |
| parent | 80f736af8bd0f6aaa535b806aae24a831177ccdd (diff) | |
bpf: introduce BPF_PROG_TYPE_PERF_EVENT program type
Introduce BPF_PROG_TYPE_PERF_EVENT programs that can be attached to
HW and SW perf events (PERF_TYPE_HARDWARE and PERF_TYPE_SOFTWARE
correspondingly in uapi/linux/perf_event.h)
The program visible context meta structure is
struct bpf_perf_event_data {
struct pt_regs regs;
__u64 sample_period;
};
which is accessible directly from the program:
int bpf_prog(struct bpf_perf_event_data *ctx)
{
... ctx->sample_period ...
... ctx->regs.ip ...
}
The bpf verifier rewrites the accesses into kernel internal
struct bpf_perf_event_data_kern which allows changing
struct perf_sample_data without affecting bpf programs.
New fields can be added to the end of struct bpf_perf_event_data
in the future.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 3cc93d7a708a..8e50962b984b 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -698,6 +698,11 @@ struct perf_output_handle { int page; }; +struct bpf_perf_event_data_kern { + struct pt_regs *regs; + struct perf_sample_data *data; +}; + #ifdef CONFIG_CGROUP_PERF /* |