1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2022, Athira Rajeev, 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 #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ 14 15 /* The data cache was reloaded from local core's L3 due to a demand load */ 16 #define EventCode 0x21c040 17 18 /* 19 * A perf sampling test for mmcr1 20 * fields : pmcxsel, unit, cache. 21 */ 22 static int mmcr1_sel_unit_cache(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 32 p = malloc(MALLOC_SIZE); 33 FAIL_IF(!p); 34 35 /* Init the event for the sampling test */ 36 event_init_sampling(&event, EventCode); 37 event.attr.sample_regs_intr = platform_extended_mask; 38 event.attr.sample_period = 1; 39 FAIL_IF(event_open(&event)); 40 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); 41 42 event_enable(&event); 43 44 /* workload to make the event overflow */ 45 for (i = 0; i < MALLOC_SIZE; i += 0x10000) 46 p[i] = i; 47 48 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 pmcxsel, unit and cache field of MMCR1 60 * match with corresponding event code fields 61 */ 62 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, pmcxsel) != 63 get_mmcr1_pmcxsel(get_reg_value(intr_regs, "MMCR1"), 1)); 64 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, unit) != 65 get_mmcr1_unit(get_reg_value(intr_regs, "MMCR1"), 1)); 66 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, cache) != 67 get_mmcr1_cache(get_reg_value(intr_regs, "MMCR1"), 1)); 68 69 free(p); 70 event_close(&event); 71 return 0; 72 } 73 74 int main(void) 75 { 76 FAIL_IF(test_harness(mmcr1_sel_unit_cache, "mmcr1_sel_unit_cache")); 77 } 78