67 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*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/* All successful D-side store dispatches for this thread that were L2 Miss */14#define EventCode 0x4688015 16extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);17 18/*19 * A perf sampling test for mmcr120 * fields : comb.21 */22static int mmcr1_comb(void)23{24 struct event event;25 u64 *intr_regs;26 u64 dummy;27 28 /* Check for platform support for the test */29 SKIP_IF(check_pvr_for_sampling_tests());30 31 /* Init the event for the sampling test */32 event_init_sampling(&event, EventCode);33 event.attr.sample_regs_intr = platform_extended_mask;34 FAIL_IF(event_open(&event));35 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);36 37 FAIL_IF(event_enable(&event));38 39 /* workload to make the event overflow */40 thirty_two_instruction_loop_with_ll_sc(10000000, &dummy);41 42 FAIL_IF(event_disable(&event));43 44 /* Check for sample count */45 FAIL_IF(!collect_samples(event.mmap_buffer));46 47 intr_regs = get_intr_regs(&event, event.mmap_buffer);48 49 /* Check for intr_regs */50 FAIL_IF(!intr_regs);51 52 /*53 * Verify that comb field match with54 * corresponding event code fields55 */56 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, comb) !=57 get_mmcr1_comb(get_reg_value(intr_regs, "MMCR1"), 4));58 59 event_close(&event);60 return 0;61}62 63int main(void)64{65 return test_harness(mmcr1_comb, "mmcr1_comb");66}67