mmcr3_src_test.c

 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 "misc.h"
11#include "utils.h"
12
13extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);
14
15/* The data cache was reloaded from local core's L3 due to a demand load */
16#define EventCode 0x1340000001c040
17
18/*
19 * A perf sampling test for mmcr3
20 * fields.
21 */
22static int mmcr3_src(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	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
31
32	/* Init the event for the sampling test */
33	event_init_sampling(&event, EventCode);
34	event.attr.sample_regs_intr = platform_extended_mask;
35	FAIL_IF(event_open(&event));
36	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
37
38	FAIL_IF(event_enable(&event));
39
40	/* workload to make event overflow */
41	thirty_two_instruction_loop_with_ll_sc(1000000, &dummy);
42
43	FAIL_IF(event_disable(&event));
44
45	/* Check for sample count */
46	FAIL_IF(!collect_samples(event.mmap_buffer));
47
48	intr_regs = get_intr_regs(&event, event.mmap_buffer);
49
50	/* Check for intr_regs */
51	FAIL_IF(!intr_regs);
52
53	/*
54	 * Verify that src field of MMCR3 match with
55	 * corresponding event code field
56	 */
57	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, mmcr3_src) !=
58		get_mmcr3_src(get_reg_value(intr_regs, "MMCR3"), 1));
59
60	event_close(&event);
61	return 0;
62}
63
64int main(void)
65{
66	return test_harness(mmcr3_src, "mmcr3_src");
67}