1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2022, Kajol Jain, 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 /* Instructions */ 16 #define EventCode 0x500fa 17 18 /* ifm field for any branch mode */ 19 #define IFM_ANY_BRANCH 0x0 20 21 /* 22 * A perf sampling test for mmcra 23 * field: ifm for bhrb any call. 24 */ 25 static int mmcra_bhrb_any_test(void) 26 { 27 struct event event; 28 u64 *intr_regs; 29 30 /* Check for platform support for the test */ 31 SKIP_IF(check_pvr_for_sampling_tests()); 32 33 /* Init the event for the sampling test */ 34 event_init_sampling(&event, EventCode); 35 event.attr.sample_regs_intr = platform_extended_mask; 36 event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; 37 event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY; 38 event.attr.exclude_kernel = 1; 39 40 FAIL_IF(event_open(&event)); 41 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 42 43 FAIL_IF(event_enable(&event)); 44 45 /* workload to make the event overflow */ 46 thirty_two_instruction_loop(10000); 47 48 FAIL_IF(event_disable(&event)); 49 50 intr_regs = get_intr_regs(&event, event.mmap_buffer); 51 52 /* Check for intr_regs */ 53 FAIL_IF(!intr_regs); 54 55 /* Verify that ifm bit is set properly in MMCRA */ 56 FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_ANY_BRANCH); 57 58 event_close(&event); 59 return 0; 60 } 61 62 int main(void) 63 { 64 return test_harness(mmcra_bhrb_any_test, "mmcra_bhrb_any_test"); 65 } 66