perf/x86: Use event_base_rdpmc for the RDPMC userspace support

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The RDPMC index is always re-calculated for the RDPMC userspace support,
which is unnecessary.

The RDPMC index value is stored in the variable event_base_rdpmc for
the kernel usage, which can be used for RDPMC userspace support as well.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200723171117.9918-2-kan.liang@linux.intel.com

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Kan Liang 2020-07-23 10:11:04 -07:00 • committed by Peter Zijlstra

parent 9123e3a74e

commit 75608cb02e

1 changed files with 3 additions and 8 deletions

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arch/x86/events/core.c

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