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| author | Alexei Starovoitov | 2016-09-02 03:37:22 +0200 |
|---|---|---|
| committer | David S. Miller | 2016-09-02 19:46:44 +0200 |
| commit | 0515e5999a466dfe6e1924f460da599bb6821487 (patch) | |
| tree | e4ba954bea80d223248c57885019b7620375164a /include/uapi/linux/bpf.h | |
| parent | bpf: support 8-byte metafield access (diff) | |
| download | kernel-qcow2-linux-0515e5999a466dfe6e1924f460da599bb6821487.tar.gz kernel-qcow2-linux-0515e5999a466dfe6e1924f460da599bb6821487.tar.xz kernel-qcow2-linux-0515e5999a466dfe6e1924f460da599bb6821487.zip | |
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>
Diffstat (limited to 'include/uapi/linux/bpf.h')
| -rw-r--r-- | include/uapi/linux/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index e4c5a1baa993..f896dfac4ac0 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -95,6 +95,7 @@ enum bpf_prog_type { BPF_PROG_TYPE_SCHED_ACT, BPF_PROG_TYPE_TRACEPOINT, BPF_PROG_TYPE_XDP, + BPF_PROG_TYPE_PERF_EVENT, }; #define BPF_PSEUDO_MAP_FD 1 |