perf, bpf: add support for HW_CACHE and RAW events

Patch 1: add support for HW_CACHE and RAW perf events to bpf:
- similar to PERF_TYPE_RAW and PERF_TYPE_HARDWARE allow PERF_TYPE_HW_CACHE events to be accessed via bpf_perf_event_read()
- similar to PERF_TYPE_HARDWARE and PERF_TYPE_SOFTWARE allow bpf programs to attch to PERF_TYPE_HW_CACHE and PERF_TYPE_RAW events as BPF_PROG_TYPE_PERF_EVENT program type

Patch 2: add tests for HW_CACHE and RAW events

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Peter,
please review patch 1. It looks trivial and as far as we can see nothing else needed. The existing perf+bpf infra covers it just fine.

Thanks!

Teng Qin (2):
perf, bpf: add support for HW_CACHE and RAW events samples/bpf: add samples for HW_CACHE / RAW events

 kernel/bpf/arraymap.c          |   1 +
 kernel/events/core.c           |   4 +-
 kernel/trace/bpf_trace.c       |   1 +
 samples/bpf/bpf_helpers.h      |   2 +-
 samples/bpf/trace_event_user.c |  46 +++++++++++-
 samples/bpf/tracex6_kern.c     |  28 ++++++--
 samples/bpf/tracex6_user.c     | 155 +++++++++++++++++++++++++++++++----------
 7 files changed, 187 insertions(+), 50 deletions(-)

2.9.3