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 struct perf_event__synthesize_extra_kmaps_cb_args {
18 struct perf_tool *tool;
19 perf_event__handler_t process;
20 struct machine *machine;
21 union perf_event *event;
22 };
23
24 static int perf_event__synthesize_extra_kmaps_cb(struct map *map, void *data)
25 {
26 struct perf_event__synthesize_extra_kmaps_cb_args *args = data;
27 union perf_event *event = args->event;
28 struct kmap *kmap;
29 size_t size;
30
31 if (!__map__is_extra_kernel_map(map))
32 return 0;
33
34 kmap = map__kmap(map);
35
36 size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
37 PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
38 args->machine->id_hdr_size;
39
40 memset(event, 0, size);
41
42 event->mmap.header.type = PERF_RECORD_MMAP;
43
44 /*
45 * kernel uses 0 for user space maps, see kernel/perf_event.c
46 * __perf_event_mmap
47 */
48 if (machine__is_host(args->machine))
49 event->header.misc = PERF_RECORD_MISC_KERNEL;
50 else
51 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
52
53 event->mmap.header.size = size;
54
55 event->mmap.start = map__start(map);
56 event->mmap.len = map__size(map);
57 event->mmap.pgoff = map__pgoff(map);
58 event->mmap.pid = args->machine->pid;
59
60 strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
61
62 if (perf_tool__process_synth_event(args->tool, event, args->machine, args->process) != 0)
63 return -1;
64
65 return 0;
66 }
67
68 int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
69 perf_event__handler_t process,
70 struct machine *machine)
71 {
72 int rc;
73 struct maps *kmaps = machine__kernel_maps(machine);
74 struct perf_event__synthesize_extra_kmaps_cb_args args = {
75 .tool = tool,
76 .process = process,
77 .machine = machine,
78 .event = zalloc(sizeof(args.event->mmap) + machine->id_hdr_size),
79 };
80
81 if (!args.event) {
82 pr_debug("Not enough memory synthesizing mmap event "
83 "for extra kernel maps\n");
84 return -1;
85 }
86
87 rc = maps__for_each_map(kmaps, perf_event__synthesize_extra_kmaps_cb, &args);
88
89 free(args.event);
90 return rc;
91 }
92
93 #endif
94
95 void arch_perf_parse_sample_weight(struct perf_sample *data,
96 const __u64 *array, u64 type)
97 {
98 union perf_sample_weight weight;
99
100 weight.full = *array;
101 if (type & PERF_SAMPLE_WEIGHT)
102 data->weight = weight.full;
103 else {
104 data->weight = weight.var1_dw;
105 data->ins_lat = weight.var2_w;
106 data->retire_lat = weight.var3_w;
107 }
108 }
109
110 void arch_perf_synthesize_sample_weight(const struct perf_sample *data,
111 __u64 *array, u64 type)
112 {
113 *array = data->weight;
114
115 if (type & PERF_SAMPLE_WEIGHT_STRUCT) {
116 *array &= 0xffffffff;
117 *array |= ((u64)data->ins_lat << 32);
118 *array |= ((u64)data->retire_lat << 48);
119 }
120 }
121
122 const char *arch_perf_header_entry(const char *se_header)
123 {
124 if (!strcmp(se_header, "Local Pipeline Stage Cycle"))
125 return "Local Retire Latency";
126 else if (!strcmp(se_header, "Pipeline Stage Cycle"))
127 return "Retire Latency";
128
129 return se_header;
130 }
131
132 int arch_support_sort_key(const char *sort_key)
133 {
134 if (!strcmp(sort_key, "p_stage_cyc"))
135 return 1;
136 if (!strcmp(sort_key, "local_p_stage_cyc"))
137 return 1;
138 return 0;
139 }
140
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