diff options
author | Alexei Starovoitov <ast@fb.com> | 2016-09-01 18:37:22 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-09-02 10:46:44 -0700 |
commit | 0515e5999a466dfe6e1924f460da599bb6821487 (patch) | |
tree | e4ba954bea80d223248c57885019b7620375164a /arch/riscv/include/uapi | |
parent | ea2e7ce5d0fc878463ba39deb46cf2ab20398fd2 (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>
Diffstat (limited to 'arch/riscv/include/uapi')
0 files changed, 0 insertions, 0 deletions