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 | * field: cc56run. |
18 | */ |
19 | static int mmcr0_cc56run(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 | SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); |
27 | |
28 | /* Init the event for the sampling test */ |
29 | event_init_sampling(e: &event, config: 0x500fa); |
30 | event.attr.sample_regs_intr = platform_extended_mask; |
31 | FAIL_IF(event_open(e: &event)); |
32 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
33 | |
34 | FAIL_IF(event_enable(e: &event)); |
35 | |
36 | /* workload to make the event overflow */ |
37 | thirty_two_instruction_loop(loops: 10000); |
38 | |
39 | FAIL_IF(event_disable(e: &event)); |
40 | |
41 | /* Check for sample count */ |
42 | FAIL_IF(!collect_samples(sample_buff: event.mmap_buffer)); |
43 | |
44 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
45 | |
46 | /* Check for intr_regs */ |
47 | FAIL_IF(!intr_regs); |
48 | |
49 | /* Verify that cc56run bit is set in MMCR0 */ |
50 | FAIL_IF(!get_mmcr0_cc56run(mmcr0: get_reg_value(intr_regs, register_name: "MMCR0"), pmc: 5)); |
51 | |
52 | event_close(e: &event); |
53 | return 0; |
54 | } |
55 | |
56 | int main(void) |
57 | { |
58 | return test_harness(mmcr0_cc56run, "mmcr0_cc56run"); |
59 | } |
60 |