selftests/powerpc/pmu: Add selftest for group constraint check MMCRA sample bits

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_repeat_test group_constraint_radix_scope_qual_test reserved_bits_mmcra_sample_elig_mode_test \

	group_constraint_mmcra_sample_test

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

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

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

/*

 * Copyright 2022, Athira Rajeev, IBM Corp.

 */

#include <stdio.h>

#include "../event.h"

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

#define EventCode_1 0x35340401e0

#define EventCode_2 0x353c0101ec

#define EventCode_3 0x35340101ec

/*

 * Test that using different sample bits in

 * event code cause failure in schedule for

 * group of events.

 */

static int group_constraint_mmcra_sample(void)

{

	struct event event, leader;

	SKIP_IF(platform_check_for_tests());

	/*

	 * Events with different "sample" field values

	 * in a group will fail to schedule.

	 * Use event with load only sampling mode as

	 * group leader. Use event with store only sampling

	 * as sibling event.

	 */

	event_init(&leader, EventCode_1);

	FAIL_IF(event_open(&leader));

	event_init(&event, EventCode_2);

	/* Expected to fail as sibling event doesn't use same sampling bits as leader */

	FAIL_IF(!event_open_with_group(&event, leader.fd));

	event_init(&event, EventCode_3);

	/* Expected to pass as sibling event use same sampling bits as leader */

	FAIL_IF(event_open_with_group(&event, leader.fd));

	event_close(&leader);

	event_close(&event);

	return 0;

}

int main(void)

{

	return test_harness(group_constraint_mmcra_sample, "group_constraint_mmcra_sample");

}