// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2022, Athira Rajeev, IBM Corp. */ #include <stdio.h> #include <stdlib.h> #include "../event.h" #include "misc.h" #include "utils.h" extern void thirty_two_instruction_loop(int loops); /* * A perf sampling test for mmcr0 * field: cc56run. */ static int mmcr0_cc56run(void) { struct event event; u64 *intr_regs; /* Check for platform support for the test */ SKIP_IF(check_pvr_for_sampling_tests()); SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); /* Init the event for the sampling test */ event_init_sampling(&event, 0x500fa); event.attr.sample_regs_intr = platform_extended_mask; FAIL_IF(event_open(&event)); event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); FAIL_IF(event_enable(&event)); /* workload to make the event overflow */ thirty_two_instruction_loop(10000); FAIL_IF(event_disable(&event)); /* Check for sample count */ FAIL_IF(!collect_samples(event.mmap_buffer)); intr_regs = get_intr_regs(&event, event.mmap_buffer); /* Check for intr_regs */ FAIL_IF(!intr_regs); /* Verify that cc56run bit is set in MMCR0 */ FAIL_IF(!get_mmcr0_cc56run(get_reg_value(intr_regs, "MMCR0"), 5)); event_close(&event); return 0; } int main(void) { return test_harness(mmcr0_cc56run, "mmcr0_cc56run"); }