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arm64: perf: Allow standard PMUv3 events to be extended by the CPU type

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Rather than continue adding CPU-specific event maps, instead look up by
default in the PMUv3 event map and only fallback to the CPU-specific maps
if either the event isn't described by PMUv3, or it is described but
the PMCEID registers say that it is unsupported by the current CPU.

Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Will Deacon 2017-08-08 16:58:33 +01:00
commit 6c833bb924
2 changed files with 32 additions and 20 deletions
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6
drivers/perf/arm_pmu.c
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@ -47,6 +47,9 @@ armpmu_map_cache_event(const unsigned (*cache_map)
if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
return -EINVAL;
if (!cache_map)
return -ENOENT;
ret = (int)(*cache_map)[cache_type][cache_op][cache_result];
if (ret == CACHE_OP_UNSUPPORTED)
@ -63,6 +66,9 @@ armpmu_map_hw_event(const unsigned (*event_map)[PERF_COUNT_HW_MAX], u64 config)
if (config >= PERF_COUNT_HW_MAX)
return -EINVAL;
if (!event_map)
return -ENOENT;
mapping = (*event_map)[config];
return mapping == HW_OP_UNSUPPORTED ? -ENOENT : mapping;
}