perf: Consolidate branch sample filter helpers

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Besides the branch type filtering requests, 'event.attr.branch_sample_type'
also contains various flags indicating which additional information should
be captured, along with the base branch record. These flags help configure
the underlying hardware, and capture the branch records appropriately when
required e.g after PMU interrupt. But first, this moves an existing helper
perf_sample_save_hw_index() into the header before adding some more helpers
for other branch sample filter flags.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220906084414.396220-1-anshuman.khandual@arm.com

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Anshuman Khandual 2022-09-06 14:14:14 +05:30 • committed by Peter Zijlstra

parent ee9db0e14b

commit 03b02db93b

2 changed files with 28 additions and 7 deletions

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26

include/linux/perf_event.h

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9

kernel/events/core.c

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