Commit a77c6976 authored by Athira Rajeev's avatar Athira Rajeev Committed by Michael Ellerman
Browse files

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: default avatarAthira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-26-atrajeev@linux.vnet.ibm.com
parent 0c902633

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

+2 −1
Original line number Diff line number Diff line
@@ -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

0 → 100644
+132 −0
Original line number Diff line number Diff line 
// 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");

}