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
perf_event__synthesize_extra_kmaps(struct perf_tool * tool,perf_event__handler_t process,struct machine * machine)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
arch_perf_parse_sample_weight(struct perf_sample * data,const __u64 * array,u64 type)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
arch_perf_synthesize_sample_weight(const struct perf_sample * data,__u64 * array,u64 type)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