| // 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_with_ll_sc(u64 loops, u64 *ll_sc_target); |
| |
| /* The data cache was reloaded from local core's L3 due to a demand load */ |
| #define EventCode 0x1340000001c040 |
| |
| /* |
| * A perf sampling test for mmcr3 |
| * fields. |
| */ |
| static int mmcr3_src(void) |
| { |
| struct event event; |
| u64 *intr_regs; |
| u64 dummy; |
| |
| /* Check for platform support for the test */ |
| SKIP_IF(check_pvr_for_sampling_tests()); |
| SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); |
| |
| /* Init the event for the sampling test */ |
| event_init_sampling(&event, EventCode); |
| event.attr.sample_regs_intr = platform_extended_mask; |
| FAIL_IF(event_open(&event)); |
| event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); |
| |
| FAIL_IF(event_enable(&event)); |
| |
| /* workload to make event overflow */ |
| thirty_two_instruction_loop_with_ll_sc(1000000, &dummy); |
| |
| FAIL_IF(event_disable(&event)); |
| |
| /* Check for sample count */ |
| FAIL_IF(!collect_samples(event.mmap_buffer)); |
| |
| intr_regs = get_intr_regs(&event, event.mmap_buffer); |
| |
| /* Check for intr_regs */ |
| FAIL_IF(!intr_regs); |
| |
| /* |
| * Verify that src field of MMCR3 match with |
| * corresponding event code field |
| */ |
| FAIL_IF(EV_CODE_EXTRACT(event.attr.config, mmcr3_src) != |
| get_mmcr3_src(get_reg_value(intr_regs, "MMCR3"), 1)); |
| |
| event_close(&event); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| return test_harness(mmcr3_src, "mmcr3_src"); |
| } |