| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright 2022, Kajol Jain, IBM Corp. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "../event.h" |
| #include "misc.h" |
| #include "utils.h" |
| |
| extern void thirty_two_instruction_loop(int loops); |
| |
| /* Instructions */ |
| #define EventCode 0x500fa |
| |
| /* ifm field for any branch mode */ |
| #define IFM_ANY_BRANCH 0x0 |
| |
| /* |
| * A perf sampling test for mmcra |
| * field: ifm for bhrb any call. |
| */ |
| static int mmcra_bhrb_any_test(void) |
| { |
| struct event event; |
| u64 *intr_regs; |
| |
| /* Check for platform support for the test */ |
| SKIP_IF(check_pvr_for_sampling_tests()); |
| |
| /* Init the event for the sampling test */ |
| event_init_sampling(&event, EventCode); |
| event.attr.sample_regs_intr = platform_extended_mask; |
| event.attr.sample_type |= PERF_SAMPLE_BRANCH_STACK; |
| event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY; |
| event.attr.exclude_kernel = 1; |
| |
| FAIL_IF(event_open(&event)); |
| event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); |
| |
| FAIL_IF(event_enable(&event)); |
| |
| /* workload to make the event overflow */ |
| thirty_two_instruction_loop(10000); |
| |
| FAIL_IF(event_disable(&event)); |
| |
| intr_regs = get_intr_regs(&event, event.mmap_buffer); |
| |
| /* Check for intr_regs */ |
| FAIL_IF(!intr_regs); |
| |
| /* Verify that ifm bit is set properly in MMCRA */ |
| FAIL_IF(get_mmcra_ifm(get_reg_value(intr_regs, "MMCRA"), 5) != IFM_ANY_BRANCH); |
| |
| event_close(&event); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| return test_harness(mmcra_bhrb_any_test, "mmcra_bhrb_any_test"); |
| } |