powerpc/perf: Fix thresholding counter data for unknown type

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[ Upstream commit 17cfccc915 ]

MMCRA[34:36] and MMCRA[38:44] expose the thresholding counter value.
Thresholding counter can be used to count latency cycles such as
load miss to reload. But threshold counter value is not relevant
when the sampled instruction type is unknown or reserved. Patch to
fix the thresholding counter value to zero when sampled instruction
type is unknown or reserved.

Fixes: 170a315f41c6('powerpc/perf: Support to export MMCRA[TEC*] field to userspace')
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Madhavan Srinivasan 2018-12-09 14:48:15 +05:30 • committed by Greg Kroah-Hartman

parent 7c50af52bf

commit 800868e397

1 changed files with 6 additions and 1 deletions

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arch/powerpc/perf/isa207-common.c

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