// 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" /* * Primary PMU event used here is PM_MRK_INST_CMPL (0x401e0) * Threshold event selection used is issue to complete for cycles * Sampling criteria is Load only sampling */ #define p9_EventCode 0x13E35340401e0 #define p10_EventCode 0x35340401e0 extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); /* A perf sampling test to test mmcra fields */ static int mmcra_thresh_cmp(void) { struct event event; u64 *intr_regs; u64 dummy; /* Check for platform support for the test */ SKIP_IF(check_pvr_for_sampling_tests()); /* Skip for comapt mode */ SKIP_IF(check_for_compat_mode()); /* Init the event for the sampling test */ if (!have_hwcap2(PPC_FEATURE2_ARCH_3_1)) { event_init_sampling(&event, p9_EventCode); } else { event_init_sampling(&event, p10_EventCode); event.attr.config1 = 1000; } 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 the 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 thresh cmp match with the corresponding event code fields */ FAIL_IF(get_thresh_cmp_val(event) != get_mmcra_thd_cmp(get_reg_value(intr_regs, "MMCRA"), 4)); event_close(&event); return 0; } int main(void) { FAIL_IF(test_harness(mmcra_thresh_cmp, "mmcra_thresh_cmp")); }