]> git.baikalelectronics.ru Git - kernel.git/commit
arm64: perf: add format entry to describe event -> config mapping
authorWill Deacon <will.deacon@arm.com>
Tue, 22 Dec 2015 14:42:57 +0000 (14:42 +0000)
committerWill Deacon <will.deacon@arm.com>
Tue, 22 Dec 2015 14:45:07 +0000 (14:45 +0000)
commit36d54bb23f2ddefdac7d82b497a39919c9bb9280
treefbba93a862f50a3325df09ddc045d7cd1239670f
parent71215dbd93499c2128f189b181f8e350b3fc4a5b
arm64: perf: add format entry to describe event -> config mapping

It's all very well providing an events directory to userspace that
details our events in terms of "event=0xNN", but if we don't define how
to encode the "event" field in the perf attr.config, then it's a waste
of time.

This patch adds a single format entry to describe that the event field
occupies the bottom 10 bits of our config field on ARMv8 (PMUv3).

Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/kernel/perf_event.c