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