75 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*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 0x01000004608015 16#define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */17 18/*19 * A perf sampling test for mmcr220 * fields : l2l321 */22static 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(&event, EventCode);35 event.attr.sample_regs_intr = platform_extended_mask;36 FAIL_IF(event_open(&event));37 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);38 39 FAIL_IF(event_enable(&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(&event));49 50 /* Check for sample count */51 FAIL_IF(!collect_samples(event.mmap_buffer));52 53 intr_regs = get_intr_regs(&event, event.mmap_buffer);54 55 /* Check for intr_regs */56 FAIL_IF(!intr_regs);57 58 /*59 * Verify that l2l3 field of MMCR2 match with60 * corresponding event code field61 */62 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) !=63 get_mmcr2_l2l3(get_reg_value(intr_regs, "MMCR2"), 4));64 65 event_close(&event);66 free(p);67 68 return 0;69}70 71int main(void)72{73 return test_harness(mmcr2_l2l3, "mmcr2_l2l3");74}75