1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2022, Madhavan Srinivasan, 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 /* All successful D-side store dispatches for this thread */ 14 #define EventCode 0x010000046080 15 16 #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ 17 18 /* 19 * A perf sampling test for mmcr2 20 * fields : l2l3 21 */ 22 static int mmcr2_l2l3(void) 23 { 24 struct event event; 25 u64 *intr_regs; 26 char *p; 27 int i; 28 29 /* Check for platform support for the test */ 30 SKIP_IF(check_pvr_for_sampling_tests()); 31 SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); 32 33 /* Init the event for the sampling test */ 34 event_init_sampling(&event, EventCode); 35 event.attr.sample_regs_intr = platform_extended_mask; 36 FAIL_IF(event_open(&event)); 37 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 38 39 FAIL_IF(event_enable(&event)); 40 41 /* workload to make the event overflow */ 42 p = malloc(MALLOC_SIZE); 43 FAIL_IF(!p); 44 45 for (i = 0; i < MALLOC_SIZE; i += 0x10000) 46 p[i] = i; 47 48 FAIL_IF(event_disable(&event)); 49 50 /* Check for sample count */ 51 FAIL_IF(!collect_samples(event.mmap_buffer)); 52 53 intr_regs = get_intr_regs(&event, event.mmap_buffer); 54 55 /* Check for intr_regs */ 56 FAIL_IF(!intr_regs); 57 58 /* 59 * Verify that l2l3 field of MMCR2 match with 60 * corresponding event code field 61 */ 62 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) != 63 get_mmcr2_l2l3(get_reg_value(intr_regs, "MMCR2"), 4)); 64 65 event_close(&event); 66 free(p); 67 68 return 0; 69 } 70 71 int main(void) 72 { 73 return test_harness(mmcr2_l2l3, "mmcr2_l2l3"); 74 } 75