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,
49 HEADER_FEAT_BITS = 256,
52 enum perf_header_version {
53 PERF_HEADER_VERSION_1,
54 PERF_HEADER_VERSION_2,
57 struct perf_file_section {
62 struct perf_file_header {
66 struct perf_file_section attrs;
67 struct perf_file_section data;
68 /* event_types is ignored */
69 struct perf_file_section event_types;
70 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
73 struct perf_pipe_file_header {
80 int perf_file_header__read(struct perf_file_header *header,
81 struct perf_header *ph, int fd);
84 enum perf_header_version version;
89 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
94 struct perf_header *ph;
96 void *buf; /* Either buf != NULL or fd >= 0 */
102 struct perf_header_feature_ops {
103 int (*write)(struct feat_fd *ff, struct evlist *evlist);
104 void (*print)(struct feat_fd *ff, FILE *fp);
105 int (*process)(struct feat_fd *ff, void *data);
116 int perf_session__read_header(struct perf_session *session);
117 int perf_session__write_header(struct perf_session *session,
118 struct evlist *evlist,
119 int fd, bool at_exit);
120 int perf_header__write_pipe(int fd);
122 void perf_header__set_feat(struct perf_header *header, int feat);
123 void perf_header__clear_feat(struct perf_header *header, int feat);
124 bool perf_header__has_feat(const struct perf_header *header, int feat);
126 int perf_header__set_cmdline(int argc, const char **argv);
128 int perf_header__process_sections(struct perf_header *header, int fd,
130 int (*process)(struct perf_file_section *section,
131 struct perf_header *ph,
132 int feat, int fd, void *data));
134 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
136 int perf_event__process_feature(struct perf_session *session,
137 union perf_event *event);
138 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
139 struct evlist **pevlist);
140 int perf_event__process_event_update(struct perf_tool *tool,
141 union perf_event *event,
142 struct evlist **pevlist);
143 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
144 int perf_event__process_tracing_data(struct perf_session *session,
145 union perf_event *event);
146 int perf_event__process_build_id(struct perf_session *session,
147 union perf_event *event);
148 bool is_perf_magic(u64 magic);
150 #define NAME_ALIGN 64
154 int do_write(struct feat_fd *fd, const void *buf, size_t size);
156 int write_padded(struct feat_fd *fd, const void *bf,
157 size_t count, size_t count_aligned);
160 * arch specific callback
162 int get_cpuid(char *buffer, size_t sz);
164 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
165 int strcmp_cpuid_str(const char *s1, const char *s2);
166 #endif /* __PERF_HEADER_H */