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linux
selftests/powerpc/pmu: Add selftest for blacklist events check in power9
Some of the events are blacklisted in power9. The list of blacklisted
events are noted in power9-events-list.h When trying to do event open
for any of these blacklisted event will cause a failure. Testcase
ensures that using blacklisted events will cause event_open to fail in
power9. This test is only applicable on power9 DD2.1 and DD2.2 and hence
test adds checks to skip on other platforms.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-26-atrajeev@linux.vnet.ibm.com
authored by
Athira Rajeev
and committed by
Michael Ellerman
a77c6976
0c902633
+134
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+2
-1
tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
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tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
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TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_test group_constraint_pmc_count_test \
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group_constraint_repeat_test group_constraint_radix_scope_qual_test reserved_bits_mmcra_sample_elig_mode_test \
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-
group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test
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group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test \
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blacklisted_events_test
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top_srcdir = ../../../../../..
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include ../../../lib.mk
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tools/testing/selftests/powerpc/pmu/event_code_tests/blacklisted_events_test.c
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tools/testing/selftests/powerpc/pmu/event_code_tests/blacklisted_events_test.c
···
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2022, Athira Rajeev, IBM Corp.
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*/
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#include <stdio.h>
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#include <sys/prctl.h>
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#include <limits.h>
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#include "../event.h"
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#include "../sampling_tests/misc.h"
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#define PM_DTLB_MISS_16G 0x1c058
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#define PM_DERAT_MISS_2M 0x1c05a
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#define PM_DTLB_MISS_2M 0x1c05c
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#define PM_MRK_DTLB_MISS_1G 0x1d15c
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#define PM_DTLB_MISS_4K 0x2c056
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#define PM_DERAT_MISS_1G 0x2c05a
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#define PM_MRK_DERAT_MISS_2M 0x2d152
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#define PM_MRK_DTLB_MISS_4K 0x2d156
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#define PM_MRK_DTLB_MISS_16G 0x2d15e
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#define PM_DTLB_MISS_64K 0x3c056
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#define PM_MRK_DERAT_MISS_1G 0x3d152
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#define PM_MRK_DTLB_MISS_64K 0x3d156
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#define PM_DISP_HELD_SYNC_HOLD 0x4003c
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#define PM_DTLB_MISS_16M 0x4c056
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#define PM_DTLB_MISS_1G 0x4c05a
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#define PM_MRK_DTLB_MISS_16M 0x4c15e
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#define PM_MRK_ST_DONE_L2 0x10134
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#define PM_RADIX_PWC_L1_HIT 0x1f056
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#define PM_FLOP_CMPL 0x100f4
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#define PM_MRK_NTF_FIN 0x20112
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#define PM_RADIX_PWC_L2_HIT 0x2d024
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#define PM_IFETCH_THROTTLE 0x3405e
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#define PM_MRK_L2_TM_ST_ABORT_SISTER 0x3e15c
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#define PM_RADIX_PWC_L3_HIT 0x3f056
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#define PM_RUN_CYC_SMT2_MODE 0x3006c
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#define PM_TM_TX_PASS_RUN_INST 0x4e014
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#define PVR_POWER9_CUMULUS 0x00002000
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int blacklist_events_dd21[] = {
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PM_MRK_ST_DONE_L2,
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PM_RADIX_PWC_L1_HIT,
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PM_FLOP_CMPL,
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PM_MRK_NTF_FIN,
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PM_RADIX_PWC_L2_HIT,
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PM_IFETCH_THROTTLE,
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PM_MRK_L2_TM_ST_ABORT_SISTER,
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PM_RADIX_PWC_L3_HIT,
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PM_RUN_CYC_SMT2_MODE,
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PM_TM_TX_PASS_RUN_INST,
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PM_DISP_HELD_SYNC_HOLD,
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};
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int blacklist_events_dd22[] = {
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PM_DTLB_MISS_16G,
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PM_DERAT_MISS_2M,
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PM_DTLB_MISS_2M,
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PM_MRK_DTLB_MISS_1G,
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PM_DTLB_MISS_4K,
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PM_DERAT_MISS_1G,
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PM_MRK_DERAT_MISS_2M,
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PM_MRK_DTLB_MISS_4K,
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PM_MRK_DTLB_MISS_16G,
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PM_DTLB_MISS_64K,
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PM_MRK_DERAT_MISS_1G,
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PM_MRK_DTLB_MISS_64K,
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PM_DISP_HELD_SYNC_HOLD,
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PM_DTLB_MISS_16M,
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PM_DTLB_MISS_1G,
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PM_MRK_DTLB_MISS_16M,
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};
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int pvr_min;
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/*
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* check for power9 support for 2.1 and
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* 2.2 model where blacklist is applicable.
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*/
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int check_for_power9_version(void)
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{
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pvr_min = PVR_MIN(mfspr(SPRN_PVR));
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SKIP_IF(PVR_VER(pvr) != POWER9);
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SKIP_IF(!(pvr & PVR_POWER9_CUMULUS));
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SKIP_IF(!(3 - pvr_min));
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return 0;
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}
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/*
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* Testcase to ensure that using blacklisted bits in
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* event code should cause event_open to fail in power9
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*/
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static int blacklisted_events(void)
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{
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struct event event;
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int i = 0;
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/* Check for platform support for the test */
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SKIP_IF(platform_check_for_tests());
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/*
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* check for power9 support for 2.1 and
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* 2.2 model where blacklist is applicable.
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*/
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SKIP_IF(check_for_power9_version());
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/* Skip for Generic compat mode */
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SKIP_IF(check_for_generic_compat_pmu());
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if (pvr_min == 1) {
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for (i = 0; i < ARRAY_SIZE(blacklist_events_dd21); i++) {
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event_init(&event, blacklist_events_dd21[i]);
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FAIL_IF(!event_open(&event));
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}
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} else if (pvr_min == 2) {
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for (i = 0; i < ARRAY_SIZE(blacklist_events_dd22); i++) {
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event_init(&event, blacklist_events_dd22[i]);
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FAIL_IF(!event_open(&event));
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}
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}
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return 0;
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}
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int main(void)
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{
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return test_harness(blacklisted_events, "blacklisted_events");
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}