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