selftests/powerpc/pmu: Add selftest for group constraint check for MMCRA thresh_sel field

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Thresh select bits in the event code is used to program thresh_sel field
in Monitor Mode Control Register A (MMCRA: 45-47). When scheduling
events as a group, all events in that group should match value in these
bits. Otherwise event open for the sibling events will fail.

Testcase uses event code PM_MRK_INST_CMPL (0x401e0) as leader and
another event PM_THRESH_MET (0x101ec) as sibling event, and checks if
group constraint checks for thresh_sel field added correctly via perf
interface.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-35-atrajeev@linux.vnet.ibm.com

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Kajol Jain 2022-06-10 19:11:12 +05:30 • committed by Michael Ellerman

parent c178606ab5

commit 9ac92fecd1

2 changed files with 64 additions and 1 deletions

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tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile

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63

tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_sel_test.c

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