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 | #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ |
14 | |
15 | /* The data cache was reloaded from local core's L3 due to a demand load */ |
16 | #define EventCode 0x21c040 |
17 | |
18 | /* |
19 | * A perf sampling test for mmcr1 |
20 | * fields : pmcxsel, unit, cache. |
21 | */ |
22 | static int mmcr1_sel_unit_cache(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 | |
32 | p = malloc(MALLOC_SIZE); |
33 | FAIL_IF(!p); |
34 | |
35 | /* Init the event for the sampling test */ |
36 | event_init_sampling(e: &event, EventCode); |
37 | event.attr.sample_regs_intr = platform_extended_mask; |
38 | event.attr.sample_period = 1; |
39 | FAIL_IF(event_open(e: &event)); |
40 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
41 | |
42 | event_enable(e: &event); |
43 | |
44 | /* workload to make the event overflow */ |
45 | for (i = 0; i < MALLOC_SIZE; i += 0x10000) |
46 | p[i] = i; |
47 | |
48 | event_disable(e: &event); |
49 | |
50 | /* Check for sample count */ |
51 | FAIL_IF(!collect_samples(sample_buff: event.mmap_buffer)); |
52 | |
53 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
54 | |
55 | /* Check for intr_regs */ |
56 | FAIL_IF(!intr_regs); |
57 | |
58 | /* |
59 | * Verify that pmcxsel, unit and cache field of MMCR1 |
60 | * match with corresponding event code fields |
61 | */ |
62 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, pmcxsel) != |
63 | get_mmcr1_pmcxsel(mmcr1: get_reg_value(intr_regs, register_name: "MMCR1" ), pmc: 1)); |
64 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, unit) != |
65 | get_mmcr1_unit(mmcr1: get_reg_value(intr_regs, register_name: "MMCR1" ), pmc: 1)); |
66 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, cache) != |
67 | get_mmcr1_cache(mmcr1: get_reg_value(intr_regs, register_name: "MMCR1" ), pmc: 1)); |
68 | |
69 | free(p); |
70 | event_close(e: &event); |
71 | return 0; |
72 | } |
73 | |
74 | int main(void) |
75 | { |
76 | FAIL_IF(test_harness(mmcr1_sel_unit_cache, "mmcr1_sel_unit_cache" )); |
77 | } |
78 | |