| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright 2022, Madhavan Srinivasan, IBM Corp. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "../event.h" |
| #include "misc.h" |
| #include "utils.h" |
| |
| /* All successful D-side store dispatches for this thread */ |
| #define EventCode 0x010000046080 |
| |
| #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ |
| |
| /* |
| * A perf sampling test for mmcr2 |
| * fields : l2l3 |
| */ |
| static int mmcr2_l2l3(void) |
| { |
| struct event event; |
| u64 *intr_regs; |
| char *p; |
| int i; |
| |
| /* Check for platform support for the test */ |
| SKIP_IF(check_pvr_for_sampling_tests()); |
| SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); |
| |
| /* Init the event for the sampling test */ |
| event_init_sampling(&event, EventCode); |
| event.attr.sample_regs_intr = platform_extended_mask; |
| FAIL_IF(event_open(&event)); |
| event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); |
| |
| FAIL_IF(event_enable(&event)); |
| |
| /* workload to make the event overflow */ |
| p = malloc(MALLOC_SIZE); |
| FAIL_IF(!p); |
| |
| for (i = 0; i < MALLOC_SIZE; i += 0x10000) |
| p[i] = i; |
| |
| FAIL_IF(event_disable(&event)); |
| |
| /* Check for sample count */ |
| FAIL_IF(!collect_samples(event.mmap_buffer)); |
| |
| intr_regs = get_intr_regs(&event, event.mmap_buffer); |
| |
| /* Check for intr_regs */ |
| FAIL_IF(!intr_regs); |
| |
| /* |
| * Verify that l2l3 field of MMCR2 match with |
| * corresponding event code field |
| */ |
| FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) != |
| get_mmcr2_l2l3(get_reg_value(intr_regs, "MMCR2"), 4)); |
| |
| event_close(&event); |
| free(p); |
| |
| return 0; |
| } |
| |
| int main(void) |
| { |
| return test_harness(mmcr2_l2l3, "mmcr2_l2l3"); |
| } |