1*014fb4a3SKajol Jain // SPDX-License-Identifier: GPL-2.0-only 2*014fb4a3SKajol Jain /* 3*014fb4a3SKajol Jain * Copyright 2022, Kajol Jain, IBM Corp. 4*014fb4a3SKajol Jain */ 5*014fb4a3SKajol Jain 6*014fb4a3SKajol Jain #include <stdio.h> 7*014fb4a3SKajol Jain #include <stdlib.h> 8*014fb4a3SKajol Jain 9*014fb4a3SKajol Jain #include "../event.h" 10*014fb4a3SKajol Jain #include "misc.h" 11*014fb4a3SKajol Jain #include "utils.h" 12*014fb4a3SKajol Jain 13*014fb4a3SKajol Jain extern void thirty_two_instruction_loop(int loops); 14*014fb4a3SKajol Jain 15*014fb4a3SKajol Jain /* Instructions */ 16*014fb4a3SKajol Jain #define EventCode 0x500fa 17*014fb4a3SKajol Jain 18*014fb4a3SKajol Jain /* ifm field for conditional branch mode */ 19*014fb4a3SKajol Jain #define IFM_COND_BRANCH 0x3 20*014fb4a3SKajol Jain 21*014fb4a3SKajol Jain /* 22*014fb4a3SKajol Jain * A perf sampling test for mmcra 23*014fb4a3SKajol Jain * field: ifm for bhrb cond call. 24*014fb4a3SKajol Jain */ mmcra_bhrb_cond_test(void)25*014fb4a3SKajol Jainstatic int mmcra_bhrb_cond_test(void) 26*014fb4a3SKajol Jain { 27*014fb4a3SKajol Jain struct event event; 28*014fb4a3SKajol Jain u64 *intr_regs; 29*014fb4a3SKajol Jain 30*014fb4a3SKajol Jain /* 31*014fb4a3SKajol Jain * Check for platform support for the test. 32*014fb4a3SKajol Jain * This test is only aplicable on power10 33*014fb4a3SKajol Jain */ 34*014fb4a3SKajol Jain SKIP_IF(check_pvr_for_sampling_tests()); 35*014fb4a3SKajol Jain SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); 36*014fb4a3SKajol Jain 37*014fb4a3SKajol Jain /* Init the event for the sampling test */ 38*014fb4a3SKajol Jain event_init_sampling(&event, EventCode); 39*014fb4a3SKajol Jain event.attr.sample_regs_intr = platform_extended_mask; 40*014fb4a3SKajol Jain event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; 41*014fb4a3SKajol Jain event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_COND; 42*014fb4a3SKajol Jain event.attr.exclude_kernel = 1; 43*014fb4a3SKajol Jain 44*014fb4a3SKajol Jain FAIL_IF(event_open(&event)); 45*014fb4a3SKajol Jain event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 46*014fb4a3SKajol Jain 47*014fb4a3SKajol Jain FAIL_IF(event_enable(&event)); 48*014fb4a3SKajol Jain 49*014fb4a3SKajol Jain /* workload to make the event overflow */ 50*014fb4a3SKajol Jain thirty_two_instruction_loop(10000); 51*014fb4a3SKajol Jain 52*014fb4a3SKajol Jain FAIL_IF(event_disable(&event)); 53*014fb4a3SKajol Jain 54*014fb4a3SKajol Jain intr_regs = get_intr_regs(&event, event.mmap_buffer); 55*014fb4a3SKajol Jain 56*014fb4a3SKajol Jain /* Check for intr_regs */ 57*014fb4a3SKajol Jain FAIL_IF(!intr_regs); 58*014fb4a3SKajol Jain 59*014fb4a3SKajol Jain /* Verify that ifm bit is set properly in MMCRA */ 60*014fb4a3SKajol Jain FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_COND_BRANCH); 61*014fb4a3SKajol Jain 62*014fb4a3SKajol Jain event_close(&event); 63*014fb4a3SKajol Jain return 0; 64*014fb4a3SKajol Jain } 65*014fb4a3SKajol Jain main(void)66*014fb4a3SKajol Jainint main(void) 67*014fb4a3SKajol Jain { 68*014fb4a3SKajol Jain return test_harness(mmcra_bhrb_cond_test, "mmcra_bhrb_cond_test"); 69*014fb4a3SKajol Jain } 70