mmcr1_sel_unit_cache_test.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2022, Athira Rajeev, IBM Corp.
 4 */
 5
 6#include <stdio.h>
 7#include <stdlib.h>
 8
 9#include "../event.h"
10#include "misc.h"
11#include "utils.h"
12
13#define MALLOC_SIZE     (0x10000 * 10)  /* Ought to be enough .. */
14
15/* The data cache was reloaded from local core's L3 due to a demand load */
16#define EventCode 0x21c040
17
18/*
19 * A perf sampling test for mmcr1
20 * fields : pmcxsel, unit, cache.
21 */
22static int mmcr1_sel_unit_cache(void)
23{
24	struct event event;
25	u64 *intr_regs;
26	char *p;
27	int i;
28
29	/* Check for platform support for the test */
30	SKIP_IF(check_pvr_for_sampling_tests());
31
32	p = malloc(MALLOC_SIZE);
33	FAIL_IF(!p);
34
35	/* Init the event for the sampling test */
36	event_init_sampling(&event, EventCode);
37	event.attr.sample_regs_intr = platform_extended_mask;
38	event.attr.sample_period = 1;
39	FAIL_IF(event_open(&event));
40	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
41
42	event_enable(&event);
43
44	/* workload to make the event overflow */
45	for (i = 0; i < MALLOC_SIZE; i += 0x10000)
46		p[i] = i;
47
48	event_disable(&event);
49
50	/* Check for sample count */
51	FAIL_IF(!collect_samples(event.mmap_buffer));
52
53	intr_regs = get_intr_regs(&event, event.mmap_buffer);
54
55	/* Check for intr_regs */
56	FAIL_IF(!intr_regs);
57
58	/*
59	 * Verify that  pmcxsel, unit and cache field of MMCR1
60	 * match with corresponding event code fields
61	 */
62	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, pmcxsel) !=
63			get_mmcr1_pmcxsel(get_reg_value(intr_regs, "MMCR1"), 1));
64	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, unit) !=
65			get_mmcr1_unit(get_reg_value(intr_regs, "MMCR1"), 1));
66	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, cache) !=
67			get_mmcr1_cache(get_reg_value(intr_regs, "MMCR1"), 1));
68
69	free(p);
70	event_close(&event);
71	return 0;
72}
73
74int main(void)
75{
76	FAIL_IF(test_harness(mmcr1_sel_unit_cache, "mmcr1_sel_unit_cache"));
77}