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 | * fields : pmae, pmao. |
18 | */ |
19 | static int mmcr0_exceptionbits(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 | |
27 | /* Init the event for the sampling test */ |
28 | event_init_sampling(e: &event, config: 0x500fa); |
29 | event.attr.sample_regs_intr = platform_extended_mask; |
30 | FAIL_IF(event_open(e: &event)); |
31 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
32 | |
33 | FAIL_IF(event_enable(e: &event)); |
34 | |
35 | /* workload to make the event overflow */ |
36 | thirty_two_instruction_loop(loops: 10000); |
37 | |
38 | FAIL_IF(event_disable(e: &event)); |
39 | |
40 | /* Check for sample count */ |
41 | FAIL_IF(!collect_samples(sample_buff: event.mmap_buffer)); |
42 | |
43 | intr_regs = get_intr_regs(event: &event, sample_buff: event.mmap_buffer); |
44 | |
45 | /* Check for intr_regs */ |
46 | FAIL_IF(!intr_regs); |
47 | |
48 | /* Verify that pmae is cleared and pmao is set in MMCR0 */ |
49 | FAIL_IF(get_mmcr0_pmae(mmcr0: get_reg_value(intr_regs, register_name: "MMCR0" ), pmc: 5)); |
50 | FAIL_IF(!get_mmcr0_pmao(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_exceptionbits, "mmcr0_exceptionbits" ); |
59 | } |
60 | |