| // 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 |
| * fields: fc56_pmc56 |
| */ |
| static int mmcr0_fc56_pmc56(void) |
| { |
| struct event event; |
| u64 *intr_regs; |
| |
| /* Check for platform support for the test */ |
| SKIP_IF(check_pvr_for_sampling_tests()); |
| |
| /* 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 fc56 is not set in MMCR0 when using PMC5 */ |
| FAIL_IF(get_mmcr0_fc56(get_reg_value(intr_regs, "MMCR0"), 5)); |
| |
| event_close(&event); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| return test_harness(mmcr0_fc56_pmc56, "mmcr0_fc56_pmc56"); |
| } |