[PATCH v7 0/5] powerpc/perf: Add json file support for hv_24x7 core level events

[Kajol Jain <kjain@linux.ibm.com>]

Patchset enhance current runtime parameter support. It introduces new
fields like "PerChip" and "PerCore" similar to the field "PerPkg" which is
used to specify perpkg events.

The "PerCore" and "PerChip" specifies whether its core or chip events.
Based on which we can decide which runtime parameter user want to
access. Now character  '?' can refers different parameter based on user
requirement.

Initially, every time we want to add new terms like chip, core, thread
etc, we need to create corrsponding fields in pmu_events and event
struct.
This patchset adds an enum called 'aggr_mode_class' which store all these
aggregation like perchip/percore. It also adds new field 'AggregationMode'
to capture these terms.
Now, if user wants to add any new term, they just need to add it in
the enum defined.

This patchset also adds  changes of adding new structure
called 'json_event' inside jevents.h
file to improve the callback prototype inside jevent files.
Initially, whenever user want to add new field, they need to update
in all function callback which makes it more and more complex with
increased number of parmeters.
With this change, we just need to add it in new structure 'json_event'.
link to the patch: https://lkml.org/lkml/2020/8/25/217

Changelog:
v6 -> v7
- Remove min and get_cpu_str functions from jevents.c
- Make json_events function static to solve warning part [John Garry].
- Add event attribute in json_events function to remove strcpy from
  real_event function, as suggested by Jiri Olsa.
- Add warning while checking aggr_mode value [Jiri Olsa].

v5 -> v6
- Made changes to improve callback prototype inside jevent file
  by adding new struture 'json_event' as suggested by Andi Kleen.

- Added Reviewd-by tag from Andi Kleen

- Made changes suggested by Jiri Olsa and John garry includes:
  - Removing jevents.h file.
  - Some nits like freeing je->event mem, adding typedef for func
    and not allocating mem for json_event structure.
  - Added free for each field in json_event as suggested by
    John Garry.
  - In real_event function, rather then returning fixed structure
    pointer, used strcpy to copy event to je->event field.

- Also merge some changes in this patch set from the patch-
  https://lkml.org/lkml/2020/8/21/222. except nest event
  change which was using capability of defining metric using other metric.

- Make power side changes as per new struture added.

Link to the previous version patchset: https://lkml.org/lkml/2020/8/27/799

Kajol Jain (5):
  perf/jevents: Remove jevents.h file
  perf/jevents: Add new structure to pass json fields.
  perf jevents: Add support for parsing perchip/percore events
  perf/tools: Pass pmu_event structure as a parameter for
    arch_get_runtimeparam
  perf/tools/pmu_events/powerpc: Add hv_24x7 core level metric events

 tools/perf/arch/powerpc/util/header.c         |   7 +-
 .../arch/powerpc/power9/nest_metrics.json     |  35 ++-
 tools/perf/pmu-events/jevents.c               | 234 +++++++++---------
 tools/perf/pmu-events/jevents.h               |  23 --
 tools/perf/pmu-events/pmu-events.h            |   6 +
 tools/perf/util/metricgroup.c                 |   5 +-
 tools/perf/util/metricgroup.h                 |   3 +-
 7 files changed, 154 insertions(+), 159 deletions(-)
 delete mode 100644 tools/perf/pmu-events/jevents.h

-- 
2.26.2