1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2022, Kajol Jain, IBM Corp.
4 */
5
6#include <stdio.h>
7#include <stdlib.h>
8
9#include "../event.h"
10#include "utils.h"
11#include "../sampling_tests/misc.h"
12
13/*
14 * Primary PMU events used here is PM_MRK_INST_CMPL (0x401e0) and
15 * PM_THRESH_MET (0x101ec)
16 * Threshold event selection used is issue to complete for cycles
17 * Sampling criteria is Load or Store only sampling
18 */
19#define p9_EventCode_1 0x13e35340401e0
20#define p9_EventCode_2 0x17d34340101ec
21#define p9_EventCode_3 0x13e35340101ec
22#define p10_EventCode_1 0x35340401e0
23#define p10_EventCode_2 0x35340101ec
24
25/*
26 * Testcase for group constraint check of thresh_cmp bits which is
27 * used to program thresh compare field in Monitor Mode Control Register A
28 * (MMCRA: 9-18 bits for power9 and MMCRA: 8-18 bits for power10).
29 * All events in the group should match thresh compare bits otherwise
30 * event_open for the group will fail.
31 */
32static int group_constraint_thresh_cmp(void)
33{
34	struct event event, leader;
35
36	/* Check for platform support for the test */
37	SKIP_IF(platform_check_for_tests());
38
39	if (have_hwcap2(PPC_FEATURE2_ARCH_3_1)) {
40		/* Init the events for the group contraint check for thresh_cmp bits */
41		event_init(&leader, p10_EventCode_1);
42
43		/* Add the thresh_cmp value for leader in config1 */
44		leader.attr.config1 = 1000;
45		FAIL_IF(event_open(&leader));
46
47		event_init(&event, p10_EventCode_2);
48
49		/* Add the different thresh_cmp value from the leader event in config1 */
50		event.attr.config1 = 2000;
51
52		/* Expected to fail as sibling and leader event request different thresh_cmp bits */
53		FAIL_IF(!event_open_with_group(&event, leader.fd));
54
55		event_close(&event);
56
57		/* Init the event for the group contraint thresh compare test */
58		event_init(&event, p10_EventCode_2);
59
60		/* Add the same thresh_cmp value for leader and sibling event in config1 */
61		event.attr.config1 = 1000;
62
63		/* Expected to succeed as sibling and leader event request same thresh_cmp bits */
64		FAIL_IF(event_open_with_group(&event, leader.fd));
65
66		event_close(&leader);
67		event_close(&event);
68	} else {
69		/* Init the events for the group contraint check for thresh_cmp bits */
70		event_init(&leader, p9_EventCode_1);
71		FAIL_IF(event_open(&leader));
72
73		event_init(&event, p9_EventCode_2);
74
75		/* Expected to fail as sibling and leader event request different thresh_cmp bits */
76		FAIL_IF(!event_open_with_group(&event, leader.fd));
77
78		event_close(&event);
79
80		/* Init the event for the group contraint thresh compare test */
81		event_init(&event, p9_EventCode_3);
82
83		/* Expected to succeed as sibling and leader event request same thresh_cmp bits */
84		FAIL_IF(event_open_with_group(&event, leader.fd));
85
86		event_close(&leader);
87		event_close(&event);
88	}
89
90	return 0;
91}
92
93int main(void)
94{
95	return test_harness(group_constraint_thresh_cmp, "group_constraint_thresh_cmp");
96}
97