1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 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 13 extern void thirty_two_instruction_loop(int loops); 14 15 /* 16 * A perf sampling test for mmcr0 17 * fields: fc56_pmc56 18 */ 19 static int mmcr0_fc56_pmc56(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 fc56 is not set in MMCR0 when using PMC5 */ 49 FAIL_IF(get_mmcr0_fc56(get_reg_value(intr_regs, "MMCR0"), 5)); 50 51 event_close(&event); 52 return 0; 53 } 54 55 int main(void) 56 { 57 return test_harness(mmcr0_fc56_pmc56, "mmcr0_fc56_pmc56"); 58 } 59