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>
8 #include <stdio.h> // FILE
10 #include <linux/bitmap.h>
11 #include <linux/types.h>
16 HEADER_RESERVED = 0, /* always cleared */
17 HEADER_FIRST_FEATURE = 1,
18 HEADER_TRACING_DATA = 1,
48 HEADER_FEAT_BITS = 256,
51 enum perf_header_version {
52 PERF_HEADER_VERSION_1,
53 PERF_HEADER_VERSION_2,
56 struct perf_file_section {
61 struct perf_file_header {
65 struct perf_file_section attrs;
66 struct perf_file_section data;
67 /* event_types is ignored */
68 struct perf_file_section event_types;
69 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
72 struct perf_pipe_file_header {
79 int perf_file_header__read(struct perf_file_header *header,
80 struct perf_header *ph, int fd);
83 enum perf_header_version version;
88 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
93 struct perf_header *ph;
95 void *buf; /* Either buf != NULL or fd >= 0 */
101 struct perf_header_feature_ops {
102 int (*write)(struct feat_fd *ff, struct evlist *evlist);
103 void (*print)(struct feat_fd *ff, FILE *fp);
104 int (*process)(struct feat_fd *ff, void *data);
115 int perf_session__read_header(struct perf_session *session);
116 int perf_session__write_header(struct perf_session *session,
117 struct evlist *evlist,
118 int fd, bool at_exit);
119 int perf_header__write_pipe(int fd);
121 void perf_header__set_feat(struct perf_header *header, int feat);
122 void perf_header__clear_feat(struct perf_header *header, int feat);
123 bool perf_header__has_feat(const struct perf_header *header, int feat);
125 int perf_header__set_cmdline(int argc, const char **argv);
127 int perf_header__process_sections(struct perf_header *header, int fd,
129 int (*process)(struct perf_file_section *section,
130 struct perf_header *ph,
131 int feat, int fd, void *data));
133 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
135 int perf_event__process_feature(struct perf_session *session,
136 union perf_event *event);
137 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
138 struct evlist **pevlist);
139 int perf_event__process_event_update(struct perf_tool *tool,
140 union perf_event *event,
141 struct evlist **pevlist);
142 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
143 int perf_event__process_tracing_data(struct perf_session *session,
144 union perf_event *event);
145 int perf_event__process_build_id(struct perf_session *session,
146 union perf_event *event);
147 bool is_perf_magic(u64 magic);
149 #define NAME_ALIGN 64
153 int do_write(struct feat_fd *fd, const void *buf, size_t size);
155 int write_padded(struct feat_fd *fd, const void *bf,
156 size_t count, size_t count_aligned);
159 * arch specific callback
161 int get_cpuid(char *buffer, size_t sz);
163 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
164 int strcmp_cpuid_str(const char *s1, const char *s2);
165 #endif /* __PERF_HEADER_H */