mmcr1_comb_test.c (1491B)
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/* All successful D-side store dispatches for this thread that were L2 Miss */ 14#define EventCode 0x46880 15 16extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); 17 18/* 19 * A perf sampling test for mmcr1 20 * 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 with 54 * corresponding event code fields 55 */ 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}