1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2022, Madhavan Srinivasan, 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 */
14 #define EventCode 0x010000046080
15 
16 #define MALLOC_SIZE     (0x10000 * 10)  /* Ought to be enough .. */
17 
18 /*
19  * A perf sampling test for mmcr2
20  * fields : l2l3
21  */
mmcr2_l2l3(void)22 static int mmcr2_l2l3(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 	SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
32 
33 	/* Init the event for the sampling test */
34 	event_init_sampling(&event, EventCode);
35 	event.attr.sample_regs_intr = platform_extended_mask;
36 	FAIL_IF(event_open(&event));
37 	event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
38 
39 	FAIL_IF(event_enable(&event));
40 
41 	/* workload to make the event overflow */
42 	p = malloc(MALLOC_SIZE);
43 	FAIL_IF(!p);
44 
45 	for (i = 0; i < MALLOC_SIZE; i += 0x10000)
46 		p[i] = i;
47 
48 	FAIL_IF(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 l2l3 field of MMCR2 match with
60 	 * corresponding event code field
61 	 */
62 	FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) !=
63 		get_mmcr2_l2l3(get_reg_value(intr_regs, "MMCR2"), 4));
64 
65 	event_close(&event);
66 	free(p);
67 
68 	return 0;
69 }
70 
main(void)71 int main(void)
72 {
73 	return test_harness(mmcr2_l2l3, "mmcr2_l2l3");
74 }
75