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 | |
13 | /* |
14 | * Primary PMU event used here is PM_MRK_INST_CMPL (0x401e0) |
15 | * Threshold event selection used is issue to complete for cycles |
16 | * Sampling criteria is Load only sampling |
17 | */ |
18 | #define p9_EventCode 0x13E35340401e0 |
19 | #define p10_EventCode 0x35340401e0 |
20 | |
21 | extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); |
22 | |
23 | /* A perf sampling test to test mmcra fields */ |
24 | static int mmcra_thresh_cmp(void) |
25 | { |
26 | struct event event; |
27 | u64 *intr_regs; |
28 | u64 dummy; |
29 | |
30 | /* Check for platform support for the test */ |
31 | SKIP_IF(check_pvr_for_sampling_tests()); |
32 | |
33 | /* Skip for comapt mode */ |
34 | SKIP_IF(check_for_compat_mode()); |
35 | |
36 | /* Init the event for the sampling test */ |
37 | if (!have_hwcap2(PPC_FEATURE2_ARCH_3_1)) { |
38 | event_init_sampling(e: &event, p9_EventCode); |
39 | } else { |
40 | event_init_sampling(e: &event, p10_EventCode); |
41 | event.attr.config1 = 1000; |
42 | } |
43 | |
44 | event.attr.sample_regs_intr = platform_extended_mask; |
45 | FAIL_IF(event_open(e: &event)); |
46 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
47 | |
48 | FAIL_IF(event_enable(e: &event)); |
49 | |
50 | /* workload to make the event overflow */ |
51 | thirty_two_instruction_loop_with_ll_sc(loops: 1000000, ll_sc_target: &dummy); |
52 | |
53 | FAIL_IF(event_disable(e: &event)); |
54 | |
55 | /* Check for sample count */ |
56 | FAIL_IF(!collect_samples(sample_buff: event.mmap_buffer)); |
57 | |
58 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
59 | |
60 | /* Check for intr_regs */ |
61 | FAIL_IF(!intr_regs); |
62 | |
63 | /* Verify that thresh cmp match with the corresponding event code fields */ |
64 | FAIL_IF(get_thresh_cmp_val(event) != |
65 | get_mmcra_thd_cmp(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
66 | |
67 | event_close(e: &event); |
68 | return 0; |
69 | } |
70 | |
71 | int main(void) |
72 | { |
73 | FAIL_IF(test_harness(mmcra_thresh_cmp, "mmcra_thresh_cmp" )); |
74 | } |
75 | |