selftests/powerpc/pmu/: Add interface test for mmcr2_fcs_fch fields

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The testcases uses cycles event to verify the freeze counter settings in
Monitor Mode Control Register 2 (MMCR2). Event modifier (exclude_kernel)
setting is used for the event attribute to check the FCxS and FCxH (
Freeze counter in privileged and hypervisor state ) settings via perf
interface.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Add error checking, check MSR for MSR_HV, drop GET_MMCR_FIELD, add to .gitignore]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220127072012.662451-19-kjain@linux.ibm.com

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Madhavan Srinivasan 2022-01-27 12:50:10 +05:30 • committed by Michael Ellerman

parent ac575b2606

commit 9ee241f1b1

3 changed files with 87 additions and 1 deletions

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1

tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore vendored

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2

tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile

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85

tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr2_fcs_fch_test.c

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