1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PERF_HEADER_H
3 #define __PERF_HEADER_H
5 #include <linux/stddef.h>
6 #include <linux/perf_event.h>
9 #include <linux/bitmap.h>
10 #include <linux/types.h>
16 HEADER_RESERVED = 0, /* always cleared */
17 HEADER_FIRST_FEATURE = 1,
18 HEADER_TRACING_DATA = 1,
43 HEADER_FEAT_BITS = 256,
46 enum perf_header_version {
47 PERF_HEADER_VERSION_1,
48 PERF_HEADER_VERSION_2,
51 struct perf_file_section {
56 struct perf_file_header {
60 struct perf_file_section attrs;
61 struct perf_file_section data;
62 /* event_types is ignored */
63 struct perf_file_section event_types;
64 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
67 struct perf_pipe_file_header {
74 int perf_file_header__read(struct perf_file_header *header,
75 struct perf_header *ph, int fd);
78 enum perf_header_version version;
83 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
90 int perf_session__read_header(struct perf_session *session);
91 int perf_session__write_header(struct perf_session *session,
92 struct perf_evlist *evlist,
93 int fd, bool at_exit);
94 int perf_header__write_pipe(int fd);
96 void perf_header__set_feat(struct perf_header *header, int feat);
97 void perf_header__clear_feat(struct perf_header *header, int feat);
98 bool perf_header__has_feat(const struct perf_header *header, int feat);
100 int perf_header__set_cmdline(int argc, const char **argv);
102 int perf_header__process_sections(struct perf_header *header, int fd,
104 int (*process)(struct perf_file_section *section,
105 struct perf_header *ph,
106 int feat, int fd, void *data));
108 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
110 int perf_event__synthesize_features(struct perf_tool *tool,
111 struct perf_session *session,
112 struct perf_evlist *evlist,
113 perf_event__handler_t process);
115 int perf_event__synthesize_extra_attr(struct perf_tool *tool,
116 struct perf_evlist *evsel_list,
117 perf_event__handler_t process,
120 int perf_event__process_feature(struct perf_session *session,
121 union perf_event *event);
123 int perf_event__synthesize_attr(struct perf_tool *tool,
124 struct perf_event_attr *attr, u32 ids, u64 *id,
125 perf_event__handler_t process);
126 int perf_event__synthesize_attrs(struct perf_tool *tool,
127 struct perf_evlist *evlist,
128 perf_event__handler_t process);
129 int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
130 struct perf_evsel *evsel,
131 perf_event__handler_t process);
132 int perf_event__synthesize_event_update_scale(struct perf_tool *tool,
133 struct perf_evsel *evsel,
134 perf_event__handler_t process);
135 int perf_event__synthesize_event_update_name(struct perf_tool *tool,
136 struct perf_evsel *evsel,
137 perf_event__handler_t process);
138 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
139 struct perf_evsel *evsel,
140 perf_event__handler_t process);
141 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
142 struct perf_evlist **pevlist);
143 int perf_event__process_event_update(struct perf_tool *tool,
144 union perf_event *event,
145 struct perf_evlist **pevlist);
146 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
148 int perf_event__synthesize_tracing_data(struct perf_tool *tool,
149 int fd, struct perf_evlist *evlist,
150 perf_event__handler_t process);
151 int perf_event__process_tracing_data(struct perf_session *session,
152 union perf_event *event);
154 int perf_event__synthesize_build_id(struct perf_tool *tool,
155 struct dso *pos, u16 misc,
156 perf_event__handler_t process,
157 struct machine *machine);
158 int perf_event__process_build_id(struct perf_session *session,
159 union perf_event *event);
160 bool is_perf_magic(u64 magic);
162 #define NAME_ALIGN 64
166 int do_write(struct feat_fd *fd, const void *buf, size_t size);
168 int write_padded(struct feat_fd *fd, const void *bf,
169 size_t count, size_t count_aligned);
172 * arch specific callback
174 int get_cpuid(char *buffer, size_t sz);
176 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
177 int strcmp_cpuid_str(const char *s1, const char *s2);
178 #endif /* __PERF_HEADER_H */