68 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2022, Kajol Jain, 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 13extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);14 15/* The data cache was reloaded from local core's L3 due to a demand load */16#define EventCode 0x1340000001c04017 18/*19 * A perf sampling test for mmcr320 * fields.21 */22static int mmcr3_src(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 SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));31 32 /* Init the event for the sampling test */33 event_init_sampling(&event, EventCode);34 event.attr.sample_regs_intr = platform_extended_mask;35 FAIL_IF(event_open(&event));36 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);37 38 FAIL_IF(event_enable(&event));39 40 /* workload to make event overflow */41 thirty_two_instruction_loop_with_ll_sc(1000000, &dummy);42 43 FAIL_IF(event_disable(&event));44 45 /* Check for sample count */46 FAIL_IF(!collect_samples(event.mmap_buffer));47 48 intr_regs = get_intr_regs(&event, event.mmap_buffer);49 50 /* Check for intr_regs */51 FAIL_IF(!intr_regs);52 53 /*54 * Verify that src field of MMCR3 match with55 * corresponding event code field56 */57 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, mmcr3_src) !=58 get_mmcr3_src(get_reg_value(intr_regs, "MMCR3"), 1));59 60 event_close(&event);61 return 0;62}63 64int main(void)65{66 return test_harness(mmcr3_src, "mmcr3_src");67}68