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selftests/powerpc/pmu: Add interface test for extended reg support

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The testcase uses check_extended_regs_support and
perf_get_platform_reg_mask function to check if the
platform has extended reg support. This will help to
check if sampling pmu selftest is enabled or not for
a given platform.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250113075858.45137-4-atrajeev@linux.vnet.ibm.com
This commit is contained in:
Kajol Jain 2025-01-13 13:28:57 +05:30 committed by Madhavan Srinivasan
parent 43751c3ce2
commit 9785def259
4 changed files with 40 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
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_disable_test bhrb_no_crash_wo_pmu_test intr_regs_no_crash_wo_pmu_test \
bhrb_filter_map_test mmcr1_sel_unit_cache_test mmcra_bhrb_disable_no_branch_test
bhrb_filter_map_test mmcr1_sel_unit_cache_test mmcra_bhrb_disable_no_branch_test \
check_extended_reg_test
top_srcdir = ../../../../../..
include ../../../lib.mk

35
tools/testing/selftests/powerpc/pmu/sampling_tests/check_extended_reg_test.c Normal file
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@ -0,0 +1,35 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2024, Kajol Jain, IBM Corp.
*/
#include <stdio.h>
#include <stdlib.h>
#include "../event.h"
#include "misc.h"
#include "utils.h"
/*
* A perf sampling test to check extended
* reg support.
*/
static int check_extended_reg_test(void)
{
/* Check for platform support for the test */
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_00));
/* Skip for Generic compat PMU */
SKIP_IF(check_for_generic_compat_pmu());
/* Check if platform supports extended regs */
platform_extended_mask = perf_get_platform_reg_mask();
FAIL_IF(check_extended_regs_support());
return 0;
}
int main(void)
{
return test_harness(check_extended_reg_test, "check_extended_reg_test");
}

2
tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c
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@ -92,7 +92,7 @@ static void init_ev_encodes(void)
}
/* Return the extended regs mask value */
static u64 perf_get_platform_reg_mask(void)
u64 perf_get_platform_reg_mask(void)
{
if (have_hwcap2(PPC_FEATURE2_ARCH_3_1))
return PERF_POWER10_MASK;

2
tools/testing/selftests/powerpc/pmu/sampling_tests/misc.h
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@ -39,6 +39,8 @@ extern int pvr;
extern u64 platform_extended_mask;
extern int check_pvr_for_sampling_tests(void);
extern int platform_check_for_tests(void);
extern int check_extended_regs_support(void);
extern u64 perf_get_platform_reg_mask(void);
/*
* Event code field extraction macro.