perf/amd/ibs: Add ->check_period() callback

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IBS Fetch and IBS Op PMUs have constraints on sample period. The sample
period is verified at the time of opening an event but not at the ioctl()
interface. Hence, a user can open an event with valid period but change
it later with ioctl(). Add a ->check_period() callback to verify the
period provided at ioctl() is also valid.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/r/20250115054438.1021-8-ravi.bangoria@amd.com

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Ravi Bangoria 2025-01-15 05:44:36 +00:00 • committed by Peter Zijlstra

parent b2fc7b282b

commit 1afbdd970f

1 changed files with 24 additions and 0 deletions

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arch/x86/events/amd/ibs.c

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