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 * field: pmccext 18 */ mmcr0_pmccext(void)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 main(void)56int main(void) 57 { 58 return test_harness(mmcr0_pmccext, "mmcr0_pmccext"); 59 } 60