s390/cpum_cf: Deny all sampling events by counter PMU

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[ Upstream commit ce97123324 ]

Deny all sampling event by the CPUMF counter facility device driver
and return -ENOENT. This return value is used to try other PMUs.
Up to now events for type PERF_TYPE_HARDWARE were not tested for
sampling and returned later on -EOPNOTSUPP. This ends the search
for alternative PMUs. Change that behavior and try other PMUs
instead.

Fixes: 613a41b0d1 ("s390/cpum_cf: Reject request for sampling in event initialization")
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Thomas Richter 2025-08-22 14:05:57 +02:00 • committed by Greg Kroah-Hartman

parent 1262bda871

commit d660c8d814

1 changed files with 2 additions and 2 deletions

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arch/s390/kernel/perf_cpum_cf.c

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