1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/types.h> 3 #include <linux/string.h> 4 #include <linux/zalloc.h> 5 #include <stdlib.h> 6 7 #include "../../../util/event.h" 8 #include "../../../util/synthetic-events.h" 9 #include "../../../util/machine.h" 10 #include "../../../util/tool.h" 11 #include "../../../util/map.h" 12 #include "../../../util/debug.h" 13 #include "util/sample.h" 14 15 #if defined(__x86_64__) 16 17 int perf_event__synthesize_extra_kmaps(struct perf_tool *tool, 18 perf_event__handler_t process, 19 struct machine *machine) 20 { 21 int rc = 0; 22 struct map *pos; 23 struct maps *kmaps = machine__kernel_maps(machine); 24 union perf_event *event = zalloc(sizeof(event->mmap) + 25 machine->id_hdr_size); 26 27 if (!event) { 28 pr_debug("Not enough memory synthesizing mmap event " 29 "for extra kernel maps\n"); 30 return -1; 31 } 32 33 maps__for_each_entry(kmaps, pos) { 34 struct kmap *kmap; 35 size_t size; 36 37 if (!__map__is_extra_kernel_map(pos)) 38 continue; 39 40 kmap = map__kmap(pos); 41 42 size = sizeof(event->mmap) - sizeof(event->mmap.filename) + 43 PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) + 44 machine->id_hdr_size; 45 46 memset(event, 0, size); 47 48 event->mmap.header.type = PERF_RECORD_MMAP; 49 50 /* 51 * kernel uses 0 for user space maps, see kernel/perf_event.c 52 * __perf_event_mmap 53 */ 54 if (machine__is_host(machine)) 55 event->header.misc = PERF_RECORD_MISC_KERNEL; 56 else 57 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 58 59 event->mmap.header.size = size; 60 61 event->mmap.start = pos->start; 62 event->mmap.len = pos->end - pos->start; 63 event->mmap.pgoff = pos->pgoff; 64 event->mmap.pid = machine->pid; 65 66 strlcpy(event->mmap.filename, kmap->name, PATH_MAX); 67 68 if (perf_tool__process_synth_event(tool, event, machine, 69 process) != 0) { 70 rc = -1; 71 break; 72 } 73 } 74 75 free(event); 76 return rc; 77 } 78 79 #endif 80 81 void arch_perf_parse_sample_weight(struct perf_sample *data, 82 const __u64 *array, u64 type) 83 { 84 union perf_sample_weight weight; 85 86 weight.full = *array; 87 if (type & PERF_SAMPLE_WEIGHT) 88 data->weight = weight.full; 89 else { 90 data->weight = weight.var1_dw; 91 data->ins_lat = weight.var2_w; 92 } 93 } 94 95 void arch_perf_synthesize_sample_weight(const struct perf_sample *data, 96 __u64 *array, u64 type) 97 { 98 *array = data->weight; 99 100 if (type & PERF_SAMPLE_WEIGHT_STRUCT) { 101 *array &= 0xffffffff; 102 *array |= ((u64)data->ins_lat << 32); 103 } 104 } 105