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/* All successful D-side store dispatches for this thread that were L2 Miss */
14#define EventCode 0x46880
15
16extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);
17
18/*
19 * A perf sampling test for mmcr1
20 * fields : comb.
21 */
22static int mmcr1_comb(void)
23{
24	struct event event;
25	u64 *intr_regs;
26	u64 dummy;
27
28	/* Check for platform support for the test */
29	SKIP_IF(check_pvr_for_sampling_tests());
30
31	/* Init the event for the sampling test */
32	event_init_sampling(&event, EventCode);
33	event.attr.sample_regs_intr = platform_extended_mask;
34	FAIL_IF(event_open(&event));
35	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
36
37	FAIL_IF(event_enable(&event));
38
39	/* workload to make the event overflow */
40	thirty_two_instruction_loop_with_ll_sc(10000000, &dummy);
41
42	FAIL_IF(event_disable(&event));
43
44	/* Check for sample count */
45	FAIL_IF(!collect_samples(event.mmap_buffer));
46
47	intr_regs = get_intr_regs(&event, event.mmap_buffer);
48
49	/* Check for intr_regs */
50	FAIL_IF(!intr_regs);
51
52	/*
53	 * Verify that comb field match with
54	 * corresponding event code fields
55	 */
56	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, comb) !=
57		get_mmcr1_comb(get_reg_value(intr_regs, "MMCR1"), 4));
58
59	event_close(&event);
60	return 0;
61}
62
63int main(void)
64{
65	return test_harness(mmcr1_comb, "mmcr1_comb");
66}
67