| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Copyright 2022, Madhavan Srinivasan, 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 | /* All successful D-side store dispatches for this thread */ |
| 14 | #define EventCode 0x010000046080 |
| 15 | |
| 16 | #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ |
| 17 | |
| 18 | /* |
| 19 | * A perf sampling test for mmcr2 |
| 20 | * fields : l2l3 |
| 21 | */ |
| 22 | static int mmcr2_l2l3(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 | SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); |
| 32 | |
| 33 | /* Init the event for the sampling test */ |
| 34 | event_init_sampling(e: &event, EventCode); |
| 35 | event.attr.sample_regs_intr = platform_extended_mask; |
| 36 | FAIL_IF(event_open(e: &event)); |
| 37 | event.mmap_buffer = event_sample_buf_mmap(fd: event.fd, mmap_pages: 1); |
| 38 | |
| 39 | FAIL_IF(event_enable(e: &event)); |
| 40 | |
| 41 | /* workload to make the event overflow */ |
| 42 | p = malloc(MALLOC_SIZE); |
| 43 | FAIL_IF(!p); |
| 44 | |
| 45 | for (i = 0; i < MALLOC_SIZE; i += 0x10000) |
| 46 | p[i] = i; |
| 47 | |
| 48 | FAIL_IF(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 l2l3 field of MMCR2 match with |
| 60 | * corresponding event code field |
| 61 | */ |
| 62 | FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) != |
| 63 | get_mmcr2_l2l3(mmcr2: get_reg_value(intr_regs, register_name: "MMCR2"), pmc: 4)); |
| 64 | |
| 65 | event_close(e: &event); |
| 66 | free(p); |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | int main(void) |
| 72 | { |
| 73 | return test_harness(mmcr2_l2l3, "mmcr2_l2l3"); |
| 74 | } |
| 75 |