1*c55dabc6SKajol Jain // SPDX-License-Identifier: GPL-2.0-only 2*c55dabc6SKajol Jain /* 3*c55dabc6SKajol Jain * Copyright 2022, Kajol Jain, IBM Corp. 4*c55dabc6SKajol Jain */ 5*c55dabc6SKajol Jain 6*c55dabc6SKajol Jain #include <stdio.h> 7*c55dabc6SKajol Jain #include <stdlib.h> 8*c55dabc6SKajol Jain 9*c55dabc6SKajol Jain #include "../event.h" 10*c55dabc6SKajol Jain #include "misc.h" 11*c55dabc6SKajol Jain #include "utils.h" 12*c55dabc6SKajol Jain 13*c55dabc6SKajol Jain extern void indirect_branch_loop(void); 14*c55dabc6SKajol Jain 15*c55dabc6SKajol Jain /* Instructions */ 16*c55dabc6SKajol Jain #define EventCode 0x500fa 17*c55dabc6SKajol Jain 18*c55dabc6SKajol Jain /* ifm field for indirect branch mode */ 19*c55dabc6SKajol Jain #define IFM_IND_BRANCH 0x2 20*c55dabc6SKajol Jain 21*c55dabc6SKajol Jain /* 22*c55dabc6SKajol Jain * A perf sampling test for mmcra 23*c55dabc6SKajol Jain * field: ifm for bhrb ind_call. 24*c55dabc6SKajol Jain */ mmcra_bhrb_ind_call_test(void)25*c55dabc6SKajol Jainstatic int mmcra_bhrb_ind_call_test(void) 26*c55dabc6SKajol Jain { 27*c55dabc6SKajol Jain struct event event; 28*c55dabc6SKajol Jain u64 *intr_regs; 29*c55dabc6SKajol Jain 30*c55dabc6SKajol Jain /* 31*c55dabc6SKajol Jain * Check for platform support for the test. 32*c55dabc6SKajol Jain * This test is only aplicable on power10 33*c55dabc6SKajol Jain */ 34*c55dabc6SKajol Jain SKIP_IF(check_pvr_for_sampling_tests()); 35*c55dabc6SKajol Jain SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); 36*c55dabc6SKajol Jain 37*c55dabc6SKajol Jain /* Init the event for the sampling test */ 38*c55dabc6SKajol Jain event_init_sampling(&event, EventCode); 39*c55dabc6SKajol Jain event.attr.sample_regs_intr = platform_extended_mask; 40*c55dabc6SKajol Jain event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; 41*c55dabc6SKajol Jain event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_IND_CALL; 42*c55dabc6SKajol Jain event.attr.exclude_kernel = 1; 43*c55dabc6SKajol Jain 44*c55dabc6SKajol Jain FAIL_IF(event_open(&event)); 45*c55dabc6SKajol Jain event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 46*c55dabc6SKajol Jain 47*c55dabc6SKajol Jain FAIL_IF(event_enable(&event)); 48*c55dabc6SKajol Jain 49*c55dabc6SKajol Jain /* workload to make the event overflow */ 50*c55dabc6SKajol Jain indirect_branch_loop(); 51*c55dabc6SKajol Jain 52*c55dabc6SKajol Jain FAIL_IF(event_disable(&event)); 53*c55dabc6SKajol Jain 54*c55dabc6SKajol Jain intr_regs = get_intr_regs(&event, event.mmap_buffer); 55*c55dabc6SKajol Jain 56*c55dabc6SKajol Jain /* Check for intr_regs */ 57*c55dabc6SKajol Jain FAIL_IF(!intr_regs); 58*c55dabc6SKajol Jain 59*c55dabc6SKajol Jain /* Verify that ifm bit is set properly in MMCRA */ 60*c55dabc6SKajol Jain FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_IND_BRANCH); 61*c55dabc6SKajol Jain 62*c55dabc6SKajol Jain event_close(&event); 63*c55dabc6SKajol Jain return 0; 64*c55dabc6SKajol Jain } 65*c55dabc6SKajol Jain main(void)66*c55dabc6SKajol Jainint main(void) 67*c55dabc6SKajol Jain { 68*c55dabc6SKajol Jain return test_harness(mmcra_bhrb_ind_call_test, "mmcra_bhrb_ind_call_test"); 69*c55dabc6SKajol Jain } 70