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selftests/powerpc/pmu: Add interface test for bhrb disable field

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The testcase uses "instructions" event to generate the
samples and fetch Monitor Mode Control Register A (MMCRA)
when overflow. Branch History Rolling Buffer(bhrb) disable bit
is part of MMCRA which need to be verified by perf interface.
Testcase checks if the bhrb disable bit of MMCRA register is
programmed correctly via perf interface for ISA v3.1 platform
Also make get_mmcra_ifm return type as u64.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-9-atrajeev@linux.vnet.ibm.com
This commit is contained in:
Kajol Jain
2022-06-10 19:10:46 +05:30
committed by Michael Ellerman
parent 014fb4a3ae
commit 84cc4e66d9
3 changed files with 69 additions and 2 deletions
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3
tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile
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@@ -5,7 +5,8 @@ TEST_GEN_PROGS := mmcr0_exceptionbits_test mmcr0_cc56run_test mmcr0_pmccext_test
mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test \
mmcr1_comb_test mmcr2_l2l3_test mmcr2_fcs_fch_test \
mmcr3_src_test mmcra_thresh_marked_sample_test mmcra_thresh_cmp_test \
mmcra_bhrb_ind_call_test mmcra_bhrb_any_test mmcra_bhrb_cond_test
mmcra_bhrb_ind_call_test mmcra_bhrb_any_test mmcra_bhrb_cond_test \
mmcra_bhrb_disable_test
top_srcdir = ../../../../../..
include ../../../lib.mk