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
13extern void thirty_two_instruction_loop(int loops);
14
15/*
16 * A perf sampling test for mmcr0
17 * field: cc56run.
18 */
19static int mmcr0_cc56run(void)
20{
21	struct event event;
22	u64 *intr_regs;
23
24	/* Check for platform support for the test */
25	SKIP_IF(check_pvr_for_sampling_tests());
26	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
27
28	 /* Init the event for the sampling test */
29	event_init_sampling(&event, 0x500fa);
30	event.attr.sample_regs_intr = platform_extended_mask;
31	FAIL_IF(event_open(&event));
32	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
33
34	FAIL_IF(event_enable(&event));
35
36	/* workload to make the event overflow */
37	thirty_two_instruction_loop(10000);
38
39	FAIL_IF(event_disable(&event));
40
41	/* Check for sample count */
42	FAIL_IF(!collect_samples(event.mmap_buffer));
43
44	intr_regs = get_intr_regs(&event, event.mmap_buffer);
45
46	/* Check for intr_regs */
47	FAIL_IF(!intr_regs);
48
49	/* Verify that cc56run bit is set in MMCR0 */
50	FAIL_IF(!get_mmcr0_cc56run(get_reg_value(intr_regs, "MMCR0"), 5));
51
52	event_close(&event);
53	return 0;
54}
55
56int main(void)
57{
58	return test_harness(mmcr0_cc56run, "mmcr0_cc56run");
59}