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selftests/powerpc/pmu: Add selftest for blacklist events check in power9

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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
This commit is contained in:
Athira Rajeev
2022-06-10 19:11:03 +05:30
committed by Michael Ellerman
parent 0c90263339
commit a77c69766c
2 changed files with 134 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
+2 -1
View File
@@ -3,7 +3,8 @@ CFLAGS += -m64
TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_test group_constraint_pmc_count_test \
group_constraint_repeat_test group_constraint_radix_scope_qual_test reserved_bits_mmcra_sample_elig_mode_test \
group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test
group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test \
blacklisted_events_test
top_srcdir = ../../../../../..
include ../../../lib.mk
tools/testing/selftests/powerpc/pmu/event_code_tests/blacklisted_events_test.c
+132
View File
@@ -0,0 +1,132 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
*/
#include <stdio.h>
#include <sys/prctl.h>
#include <limits.h>
#include "../event.h"
#include "../sampling_tests/misc.h"
#define PM_DTLB_MISS_16G 0x1c058
#define PM_DERAT_MISS_2M 0x1c05a
#define PM_DTLB_MISS_2M 0x1c05c
#define PM_MRK_DTLB_MISS_1G 0x1d15c
#define PM_DTLB_MISS_4K 0x2c056
#define PM_DERAT_MISS_1G 0x2c05a
#define PM_MRK_DERAT_MISS_2M 0x2d152
#define PM_MRK_DTLB_MISS_4K 0x2d156
#define PM_MRK_DTLB_MISS_16G 0x2d15e
#define PM_DTLB_MISS_64K 0x3c056
#define PM_MRK_DERAT_MISS_1G 0x3d152
#define PM_MRK_DTLB_MISS_64K 0x3d156
#define PM_DISP_HELD_SYNC_HOLD 0x4003c
#define PM_DTLB_MISS_16M 0x4c056
#define PM_DTLB_MISS_1G 0x4c05a
#define PM_MRK_DTLB_MISS_16M 0x4c15e
#define PM_MRK_ST_DONE_L2 0x10134
#define PM_RADIX_PWC_L1_HIT 0x1f056
#define PM_FLOP_CMPL 0x100f4
#define PM_MRK_NTF_FIN 0x20112
#define PM_RADIX_PWC_L2_HIT 0x2d024
#define PM_IFETCH_THROTTLE 0x3405e
#define PM_MRK_L2_TM_ST_ABORT_SISTER 0x3e15c
#define PM_RADIX_PWC_L3_HIT 0x3f056
#define PM_RUN_CYC_SMT2_MODE 0x3006c
#define PM_TM_TX_PASS_RUN_INST 0x4e014
#define PVR_POWER9_CUMULUS 0x00002000
int blacklist_events_dd21[] = {
PM_MRK_ST_DONE_L2,
PM_RADIX_PWC_L1_HIT,
PM_FLOP_CMPL,
PM_MRK_NTF_FIN,
PM_RADIX_PWC_L2_HIT,
PM_IFETCH_THROTTLE,
PM_MRK_L2_TM_ST_ABORT_SISTER,
PM_RADIX_PWC_L3_HIT,
PM_RUN_CYC_SMT2_MODE,
PM_TM_TX_PASS_RUN_INST,
PM_DISP_HELD_SYNC_HOLD,
};
int blacklist_events_dd22[] = {
PM_DTLB_MISS_16G,
PM_DERAT_MISS_2M,
PM_DTLB_MISS_2M,
PM_MRK_DTLB_MISS_1G,
PM_DTLB_MISS_4K,
PM_DERAT_MISS_1G,
PM_MRK_DERAT_MISS_2M,
PM_MRK_DTLB_MISS_4K,
PM_MRK_DTLB_MISS_16G,
PM_DTLB_MISS_64K,
PM_MRK_DERAT_MISS_1G,
PM_MRK_DTLB_MISS_64K,
PM_DISP_HELD_SYNC_HOLD,
PM_DTLB_MISS_16M,
PM_DTLB_MISS_1G,
PM_MRK_DTLB_MISS_16M,
};
int pvr_min;
/*
* check for power9 support for 2.1 and
* 2.2 model where blacklist is applicable.
*/
int check_for_power9_version(void)
{
pvr_min = PVR_MIN(mfspr(SPRN_PVR));
SKIP_IF(PVR_VER(pvr) != POWER9);
SKIP_IF(!(pvr & PVR_POWER9_CUMULUS));
SKIP_IF(!(3 - pvr_min));
return 0;
}
/*
* Testcase to ensure that using blacklisted bits in
* event code should cause event_open to fail in power9
*/
static int blacklisted_events(void)
{
struct event event;
int i = 0;
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
/*
* check for power9 support for 2.1 and
* 2.2 model where blacklist is applicable.
*/
SKIP_IF(check_for_power9_version());
/* Skip for Generic compat mode */
SKIP_IF(check_for_generic_compat_pmu());
if (pvr_min == 1) {
for (i = 0; i < ARRAY_SIZE(blacklist_events_dd21); i++) {
event_init(&event, blacklist_events_dd21[i]);
FAIL_IF(!event_open(&event));
}
} else if (pvr_min == 2) {
for (i = 0; i < ARRAY_SIZE(blacklist_events_dd22); i++) {
event_init(&event, blacklist_events_dd22[i]);
FAIL_IF(!event_open(&event));
}
}
return 0;
}
int main(void)
{
return test_harness(blacklisted_events, "blacklisted_events");
}