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 extern void thirty_two_instruction_loop(int loops);
14 
15 /*
16  * A perf sampling test for mmcr0
17  * fields: fc56_pmc56
18  */
mmcr0_fc56_pmc56(void)19 static int mmcr0_fc56_pmc56(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 
27 	/* Init the event for the sampling test */
28 	event_init_sampling(&event, 0x500fa);
29 	event.attr.sample_regs_intr = platform_extended_mask;
30 	FAIL_IF(event_open(&event));
31 	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
32 
33 	FAIL_IF(event_enable(&event));
34 
35 	/* workload to make the event overflow */
36 	thirty_two_instruction_loop(10000);
37 
38 	FAIL_IF(event_disable(&event));
39 
40 	/* Check for sample count */
41 	FAIL_IF(!collect_samples(event.mmap_buffer));
42 
43 	intr_regs = get_intr_regs(&event, event.mmap_buffer);
44 
45 	/* Check for intr_regs */
46 	FAIL_IF(!intr_regs);
47 
48 	/* Verify that fc56 is not set in MMCR0 when using PMC5 */
49 	FAIL_IF(get_mmcr0_fc56(get_reg_value(intr_regs, "MMCR0"), 5));
50 
51 	event_close(&event);
52 	return 0;
53 }
54 
main(void)55 int main(void)
56 {
57 	return test_harness(mmcr0_fc56_pmc56, "mmcr0_fc56_pmc56");
58 }
59