1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_HEADER_H
3 #define __PERF_HEADER_H
5 #include <linux/perf_event.h>
8 #include <linux/bitmap.h>
9 #include <linux/types.h>
14 HEADER_RESERVED = 0, /* always cleared */
15 HEADER_FIRST_FEATURE = 1,
16 HEADER_TRACING_DATA = 1,
38 HEADER_FEAT_BITS = 256,
41 enum perf_header_version {
42 PERF_HEADER_VERSION_1,
43 PERF_HEADER_VERSION_2,
46 struct perf_file_section {
51 struct perf_file_header {
55 struct perf_file_section attrs;
56 struct perf_file_section data;
57 /* event_types is ignored */
58 struct perf_file_section event_types;
59 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
62 struct perf_pipe_file_header {
69 int perf_file_header__read(struct perf_file_header *header,
70 struct perf_header *ph, int fd);
73 enum perf_header_version version;
78 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
85 int perf_session__read_header(struct perf_session *session);
86 int perf_session__write_header(struct perf_session *session,
87 struct perf_evlist *evlist,
88 int fd, bool at_exit);
89 int perf_header__write_pipe(int fd);
91 void perf_header__set_feat(struct perf_header *header, int feat);
92 void perf_header__clear_feat(struct perf_header *header, int feat);
93 bool perf_header__has_feat(const struct perf_header *header, int feat);
95 int perf_header__set_cmdline(int argc, const char **argv);
97 int perf_header__process_sections(struct perf_header *header, int fd,
99 int (*process)(struct perf_file_section *section,
100 struct perf_header *ph,
101 int feat, int fd, void *data));
103 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
105 int perf_event__synthesize_features(struct perf_tool *tool,
106 struct perf_session *session,
107 struct perf_evlist *evlist,
108 perf_event__handler_t process);
110 int perf_event__process_feature(struct perf_tool *tool,
111 union perf_event *event,
112 struct perf_session *session);
114 int perf_event__synthesize_attr(struct perf_tool *tool,
115 struct perf_event_attr *attr, u32 ids, u64 *id,
116 perf_event__handler_t process);
117 int perf_event__synthesize_attrs(struct perf_tool *tool,
118 struct perf_session *session,
119 perf_event__handler_t process);
120 int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
121 struct perf_evsel *evsel,
122 perf_event__handler_t process);
123 int perf_event__synthesize_event_update_scale(struct perf_tool *tool,
124 struct perf_evsel *evsel,
125 perf_event__handler_t process);
126 int perf_event__synthesize_event_update_name(struct perf_tool *tool,
127 struct perf_evsel *evsel,
128 perf_event__handler_t process);
129 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
130 struct perf_evsel *evsel,
131 perf_event__handler_t process);
132 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
133 struct perf_evlist **pevlist);
134 int perf_event__process_event_update(struct perf_tool *tool,
135 union perf_event *event,
136 struct perf_evlist **pevlist);
137 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
139 int perf_event__synthesize_tracing_data(struct perf_tool *tool,
140 int fd, struct perf_evlist *evlist,
141 perf_event__handler_t process);
142 int perf_event__process_tracing_data(struct perf_tool *tool,
143 union perf_event *event,
144 struct perf_session *session);
146 int perf_event__synthesize_build_id(struct perf_tool *tool,
147 struct dso *pos, u16 misc,
148 perf_event__handler_t process,
149 struct machine *machine);
150 int perf_event__process_build_id(struct perf_tool *tool,
151 union perf_event *event,
152 struct perf_session *session);
153 bool is_perf_magic(u64 magic);
155 #define NAME_ALIGN 64
159 int do_write(struct feat_fd *fd, const void *buf, size_t size);
161 int write_padded(struct feat_fd *fd, const void *bf,
162 size_t count, size_t count_aligned);
165 * arch specific callback
167 int get_cpuid(char *buffer, size_t sz);
169 char *get_cpuid_str(void);
170 #endif /* __PERF_HEADER_H */