Commit 9258c0aa authored by Athira Rajeev's avatar Athira Rajeev Committed by Michael Ellerman
Browse files

selftests/powerpc/pmu: Add selftest for group constraint check for PMC5 and PMC6 



Events using Performance Monitor Counter 5 (PMC5) and Performance
Monitor Counter 6 (PMC6) can't have other fields in event code like
cache bits, thresholding or marked bit. PMC5 and PMC6 only supports base
events: ie 500fa and 600f4. Other combinations should fail. Testcase
tries setting other bits in event code for 500fa and 600f4 to check this
scenario.

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/20220610134113.62991-17-atrajeev@linux.vnet.ibm.com
parent 0a110a4b

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

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# SPDX-License-Identifier: GPL-2.0

CFLAGS += -m64



TEST_GEN_PROGS :=

TEST_GEN_PROGS := group_constraint_pmc56_test



top_srcdir = ../../../../../..

include ../../../lib.mk

tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_pmc56_test.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright 2022, Athira Rajeev, IBM Corp.

 */



#include <stdio.h>

#include "../event.h"

#include "../sampling_tests/misc.h"



/*

 * Testcase for checking constraint checks for

 * Performance Monitor Counter 5 (PMC5) and also

 * Performance Monitor Counter 6 (PMC6). Events using

 * PMC5/PMC6 shouldn't have other fields in event

 * code like cache bits, thresholding or marked bit.

 */



static int group_constraint_pmc56(void)

{

	struct event event;



	/* Check for platform support for the test */

	SKIP_IF(platform_check_for_tests());



	/*

	 * Events using PMC5 and PMC6 with cache bit

	 * set in event code is expected to fail.

	 */

	event_init(&event, 0x2500fa);

	FAIL_IF(!event_open(&event));



	event_init(&event, 0x2600f4);

	FAIL_IF(!event_open(&event));



	/*

	 * PMC5 and PMC6 only supports base events:

	 * ie 500fa and 600f4. Other combinations

	 * should fail.

	 */

	event_init(&event, 0x501e0);

	FAIL_IF(!event_open(&event));



	event_init(&event, 0x6001e);

	FAIL_IF(!event_open(&event));



	event_init(&event, 0x501fa);

	FAIL_IF(!event_open(&event));



	/*

	 * Events using PMC5 and PMC6 with random

	 * sampling bits set in event code should fail

	 * to schedule.

	 */

	event_init(&event, 0x35340500fa);

	FAIL_IF(!event_open(&event));



	return 0;

}



int main(void)

{

	return test_harness(group_constraint_pmc56, "group_constraint_pmc56");

}