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 * Load Missed L1, for power9 its pointing to PM_LD_MISS_L1_FIN (0x2c04e) and
15 * for power10 its pointing to PM_LD_MISS_L1 (0x3e054)
16 *
17 * Hardware cache level : PERF_COUNT_HW_CACHE_L1D
18 * Hardware cache event operation type : PERF_COUNT_HW_CACHE_OP_READ
19 * Hardware cache event result type : PERF_COUNT_HW_CACHE_RESULT_MISS
20 */
21#define EventCode_1 0x10000
22/*
23 * Hardware cache level : PERF_COUNT_HW_CACHE_L1D
24 * Hardware cache event operation type : PERF_COUNT_HW_CACHE_OP_WRITE
25 * Hardware cache event result type : PERF_COUNT_HW_CACHE_RESULT_ACCESS
26 */
27#define EventCode_2 0x0100
28/*
29 * Hardware cache level : PERF_COUNT_HW_CACHE_DTLB
30 * Hardware cache event operation type : PERF_COUNT_HW_CACHE_OP_WRITE
31 * Hardware cache event result type : PERF_COUNT_HW_CACHE_RESULT_ACCESS
32 */
33#define EventCode_3 0x0103
34/*
35 * Hardware cache level : PERF_COUNT_HW_CACHE_L1D
36 * Hardware cache event operation type : PERF_COUNT_HW_CACHE_OP_READ
37 * Hardware cache event result type : Invalid ( > PERF_COUNT_HW_CACHE_RESULT_MAX)
38 */
39#define EventCode_4 0x030000
40
41/*
42 * A perf test to check valid hardware cache events.
43 */
44static int hw_cache_event_type_test(void)
45{
46 struct event event;
47
48 /* Check for platform support for the test */
49 SKIP_IF(platform_check_for_tests());
50
51 /* Skip for Generic compat PMU */
52 SKIP_IF(check_for_generic_compat_pmu());
53
54 /* Init the event to test hardware cache event */
55 event_init_opts(e: &event, EventCode_1, type: PERF_TYPE_HW_CACHE, name: "event");
56
57 /* Expected to success as its pointing to L1 load miss */
58 FAIL_IF(event_open(e: &event));
59 event_close(e: &event);
60
61 /* Init the event to test hardware cache event */
62 event_init_opts(e: &event, EventCode_2, type: PERF_TYPE_HW_CACHE, name: "event");
63
64 /* Expected to fail as the corresponding cache event entry have 0 in that index */
65 FAIL_IF(!event_open(e: &event));
66 event_close(e: &event);
67
68 /* Init the event to test hardware cache event */
69 event_init_opts(e: &event, EventCode_3, type: PERF_TYPE_HW_CACHE, name: "event");
70
71 /* Expected to fail as the corresponding cache event entry have -1 in that index */
72 FAIL_IF(!event_open(e: &event));
73 event_close(e: &event);
74
75 /* Init the event to test hardware cache event */
76 event_init_opts(e: &event, EventCode_4, type: PERF_TYPE_HW_CACHE, name: "event");
77
78 /* Expected to fail as hardware cache event result type is Invalid */
79 FAIL_IF(!event_open(e: &event));
80 event_close(e: &event);
81
82 return 0;
83}
84
85int main(void)
86{
87 return test_harness(hw_cache_event_type_test, "hw_cache_event_type_test");
88}
89

source code of linux/tools/testing/selftests/powerpc/pmu/event_code_tests/hw_cache_event_type_test.c