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 extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); 14 15 /* The data cache was reloaded from local core's L3 due to a demand load */ 16 #define EventCode 0x1340000001c040 17 18 /* 19 * A perf sampling test for mmcr3 20 * fields. 21 */ 22 static int mmcr3_src(void) 23 { 24 struct event event; 25 u64 *intr_regs; 26 u64 dummy; 27 28 /* Check for platform support for the test */ 29 SKIP_IF(check_pvr_for_sampling_tests()); 30 SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); 31 32 /* Init the event for the sampling test */ 33 event_init_sampling(&event, EventCode); 34 event.attr.sample_regs_intr = platform_extended_mask; 35 FAIL_IF(event_open(&event)); 36 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 37 38 FAIL_IF(event_enable(&event)); 39 40 /* workload to make event overflow */ 41 thirty_two_instruction_loop_with_ll_sc(1000000, &dummy); 42 43 FAIL_IF(event_disable(&event)); 44 45 /* Check for sample count */ 46 FAIL_IF(!collect_samples(event.mmap_buffer)); 47 48 intr_regs = get_intr_regs(&event, event.mmap_buffer); 49 50 /* Check for intr_regs */ 51 FAIL_IF(!intr_regs); 52 53 /* 54 * Verify that src field of MMCR3 match with 55 * corresponding event code field 56 */ 57 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, mmcr3_src) != 58 get_mmcr3_src(get_reg_value(intr_regs, "MMCR3"), 1)); 59 60 event_close(&event); 61 return 0; 62 } 63 64 int main(void) 65 { 66 return test_harness(mmcr3_src, "mmcr3_src"); 67 } 68