1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2022, Kajol Jain, IBM Corp. 4 */ 5 6 #include <stdio.h> 7 #include <stdlib.h> 8 9 #include "../event.h" 10 #include "misc.h" 11 #include "utils.h" 12 13 /* 14 * Primary PMU event used here is PM_MRK_INST_CMPL (0x401e0) 15 * Threshold event selection used is issue to complete for cycles 16 * Sampling criteria is Load only sampling 17 */ 18 #define p9_EventCode 0x13E35340401e0 19 #define p10_EventCode 0x35340401e0 20 21 extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); 22 23 /* A perf sampling test to test mmcra fields */ 24 static int mmcra_thresh_cmp(void) 25 { 26 struct event event; 27 u64 *intr_regs; 28 u64 dummy; 29 30 /* Check for platform support for the test */ 31 SKIP_IF(check_pvr_for_sampling_tests()); 32 33 /* Skip for comapt mode */ 34 SKIP_IF(check_for_compat_mode()); 35 36 /* Init the event for the sampling test */ 37 if (!have_hwcap2(PPC_FEATURE2_ARCH_3_1)) { 38 event_init_sampling(&event, p9_EventCode); 39 } else { 40 event_init_sampling(&event, p10_EventCode); 41 event.attr.config1 = 1000; 42 } 43 44 event.attr.sample_regs_intr = platform_extended_mask; 45 FAIL_IF(event_open(&event)); 46 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 47 48 FAIL_IF(event_enable(&event)); 49 50 /* workload to make the event overflow */ 51 thirty_two_instruction_loop_with_ll_sc(1000000, &dummy); 52 53 FAIL_IF(event_disable(&event)); 54 55 /* Check for sample count */ 56 FAIL_IF(!collect_samples(event.mmap_buffer)); 57 58 intr_regs = get_intr_regs(&event, event.mmap_buffer); 59 60 /* Check for intr_regs */ 61 FAIL_IF(!intr_regs); 62 63 /* Verify that thresh cmp match with the corresponding event code fields */ 64 FAIL_IF(get_thresh_cmp_val(event) != 65 get_mmcra_thd_cmp(get_reg_value(intr_regs, "MMCRA"), 4)); 66 67 event_close(&event); 68 return 0; 69 } 70 71 int main(void) 72 { 73 FAIL_IF(test_harness(mmcra_thresh_cmp, "mmcra_thresh_cmp")); 74 } 75