[PATCH v4 0/4] perf util: bpf perf improvements

[Song Liu]

This patches set improves bpf_perf (perf-stat --bpf-counter) by
 1) exposing key definitions to a libperf header;
 2) adding compatibility check for perf_attr_map;
 3) introducing config stat.bpf-counter-events.
 4) introducing 'b' modify to event parser.

Changes v3 => v4:
1. Improve the logic that decides when to skip read_affinity_counters().
   (Jiri)
2. Clean up a condition in bpf_counters.c:read_counters(). (Jiri)

Changes v2 => v3:
1. Add 'b' modifier. (Jiri)
2. Allow configuring stat.bpf-counter-events with any event name (instead
  of limiting to hardware events). (Jiri)

Changes v1 => v2:
1. Separte 2/3 from 1/3. (Jiri)
2. Rename bperf.h to bpf_perf.h. (Jiri)
3. Other small fixes/optimizations. (Jiri)

Song Liu (4):
  perf util: move bpf_perf definitions to a libperf header
  perf bpf: check perf_attr_map is compatible with the perf binary
  perf-stat: introduce config stat.bpf-counter-events
  perf-stat: introduce ':b' modifier

 tools/lib/perf/include/perf/bpf_perf.h | 31 ++++++++++++++++
 tools/perf/Documentation/perf-stat.txt |  2 ++
 tools/perf/builtin-stat.c              | 40 ++++++++++++---------
 tools/perf/util/bpf_counter.c          | 49 +++++++++++++-------------
 tools/perf/util/config.c               |  4 +++
 tools/perf/util/evsel.c                | 22 ++++++++++++
 tools/perf/util/evsel.h                |  9 +++++
 tools/perf/util/parse-events.c         |  8 ++++-
 tools/perf/util/parse-events.l         |  2 +-
 tools/perf/util/target.h               |  5 ---
 10 files changed, 123 insertions(+), 49 deletions(-)
 create mode 100644 tools/lib/perf/include/perf/bpf_perf.h

--
2.30.2