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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 * fields : pmae, pmao.18 */19static int mmcr0_exceptionbits(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 27 /* Init the event for the sampling test */28 event_init_sampling(&event, 0x500fa);29 event.attr.sample_regs_intr = platform_extended_mask;30 FAIL_IF(event_open(&event));31 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);32 33 FAIL_IF(event_enable(&event));34 35 /* workload to make the event overflow */36 thirty_two_instruction_loop(10000);37 38 FAIL_IF(event_disable(&event));39 40 /* Check for sample count */41 FAIL_IF(!collect_samples(event.mmap_buffer));42 43 intr_regs = get_intr_regs(&event, event.mmap_buffer);44 45 /* Check for intr_regs */46 FAIL_IF(!intr_regs);47 48 /* Verify that pmae is cleared and pmao is set in MMCR0 */49 FAIL_IF(get_mmcr0_pmae(get_reg_value(intr_regs, "MMCR0"), 5));50 FAIL_IF(!get_mmcr0_pmao(get_reg_value(intr_regs, "MMCR0"), 5));51 52 event_close(&event);53 return 0;54}55 56int main(void)57{58 return test_harness(mmcr0_exceptionbits, "mmcr0_exceptionbits");59}60