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 EventCode 0x35340401e0 |
19 | |
20 | extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); |
21 | |
22 | /* A perf sampling test to test mmcra fields */ |
23 | static int mmcra_thresh_marked_sample(void) |
24 | { |
25 | struct event event; |
26 | u64 *intr_regs; |
27 | u64 dummy; |
28 | |
29 | /* Check for platform support for the test */ |
30 | SKIP_IF(check_pvr_for_sampling_tests()); |
31 | |
32 | /* Init the event for the sampling test */ |
33 | event_init_sampling(e: &event, EventCode); |
34 | event.attr.sample_regs_intr = platform_extended_mask; |
35 | FAIL_IF(event_open(e: &event)); |
36 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
37 | |
38 | FAIL_IF(event_enable(e: &event)); |
39 | |
40 | /* workload to make the event overflow */ |
41 | thirty_two_instruction_loop_with_ll_sc(loops: 1000000, ll_sc_target: &dummy); |
42 | |
43 | FAIL_IF(event_disable(e: &event)); |
44 | |
45 | /* Check for sample count */ |
46 | FAIL_IF(!collect_samples(sample_buff: event.mmap_buffer)); |
47 | |
48 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
49 | |
50 | /* Check for intr_regs */ |
51 | FAIL_IF(!intr_regs); |
52 | |
53 | /* |
54 | * Verify that thresh sel/start/stop, marked, random sample |
55 | * eligibility, sdar mode and sample mode fields match with |
56 | * the corresponding event code fields |
57 | */ |
58 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_sel) != |
59 | get_mmcra_thd_sel(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
60 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_start) != |
61 | get_mmcra_thd_start(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
62 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_stop) != |
63 | get_mmcra_thd_stop(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
64 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, marked) != |
65 | get_mmcra_marked(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
66 | FAIL_IF((EV_CODE_EXTRACT(event.attr.config, sample) >> 2) != |
67 | get_mmcra_rand_samp_elig(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
68 | FAIL_IF((EV_CODE_EXTRACT(event.attr.config, sample) & 0x3) != |
69 | get_mmcra_sample_mode(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
70 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, sm) != |
71 | get_mmcra_sm(mmcra: get_reg_value(intr_regs, register_name: "MMCRA" ), pmc: 4)); |
72 | |
73 | event_close(e: &event); |
74 | return 0; |
75 | } |
76 | |
77 | int main(void) |
78 | { |
79 | return test_harness(mmcra_thresh_marked_sample, "mmcra_thresh_marked_sample" ); |
80 | } |
81 | |