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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 13extern void thirty_two_instruction_loop(int loops);14 15/*16 * A perf sampling test for mmcr017 * field: pmccext18 */19static int mmcr0_pmccext(void)20{21 struct event event;22 u64 *intr_regs;23 24 /* Check for platform support for the test */25 SKIP_IF(check_pvr_for_sampling_tests());26 SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));27 28 /* Init the event for the sampling test */29 event_init_sampling(&event, 0x4001e);30 event.attr.sample_regs_intr = platform_extended_mask;31 FAIL_IF(event_open(&event));32 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);33 34 FAIL_IF(event_enable(&event));35 36 /* workload to make the event overflow */37 thirty_two_instruction_loop(10000);38 39 FAIL_IF(event_disable(&event));40 41 /* Check for sample count */42 FAIL_IF(!collect_samples(event.mmap_buffer));43 44 intr_regs = get_intr_regs(&event, event.mmap_buffer);45 46 /* Check for intr_regs */47 FAIL_IF(!intr_regs);48 49 /* Verify that pmccext field is set in MMCR0 */50 FAIL_IF(!get_mmcr0_pmccext(get_reg_value(intr_regs, "MMCR0"), 4));51 52 event_close(&event);53 return 0;54}55 56int main(void)57{58 return test_harness(mmcr0_pmccext, "mmcr0_pmccext");59}60