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,
47 HEADER_FEAT_BITS = 256,
50 enum perf_header_version {
51 PERF_HEADER_VERSION_1,
52 PERF_HEADER_VERSION_2,
55 struct perf_file_section {
60 struct perf_file_header {
64 struct perf_file_section attrs;
65 struct perf_file_section data;
66 /* event_types is ignored */
67 struct perf_file_section event_types;
68 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
71 struct perf_pipe_file_header {
78 int perf_file_header__read(struct perf_file_header *header,
79 struct perf_header *ph, int fd);
82 enum perf_header_version version;
87 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
92 struct perf_header *ph;
94 void *buf; /* Either buf != NULL or fd >= 0 */
100 struct perf_header_feature_ops {
101 int (*write)(struct feat_fd *ff, struct evlist *evlist);
102 void (*print)(struct feat_fd *ff, FILE *fp);
103 int (*process)(struct feat_fd *ff, void *data);
114 int perf_session__read_header(struct perf_session *session);
115 int perf_session__write_header(struct perf_session *session,
116 struct evlist *evlist,
117 int fd, bool at_exit);
118 int perf_header__write_pipe(int fd);
120 void perf_header__set_feat(struct perf_header *header, int feat);
121 void perf_header__clear_feat(struct perf_header *header, int feat);
122 bool perf_header__has_feat(const struct perf_header *header, int feat);
124 int perf_header__set_cmdline(int argc, const char **argv);
126 int perf_header__process_sections(struct perf_header *header, int fd,
128 int (*process)(struct perf_file_section *section,
129 struct perf_header *ph,
130 int feat, int fd, void *data));
132 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
134 int perf_event__process_feature(struct perf_session *session,
135 union perf_event *event);
136 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
137 struct evlist **pevlist);
138 int perf_event__process_event_update(struct perf_tool *tool,
139 union perf_event *event,
140 struct evlist **pevlist);
141 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
142 int perf_event__process_tracing_data(struct perf_session *session,
143 union perf_event *event);
144 int perf_event__process_build_id(struct perf_session *session,
145 union perf_event *event);
146 bool is_perf_magic(u64 magic);
148 #define NAME_ALIGN 64
152 int do_write(struct feat_fd *fd, const void *buf, size_t size);
154 int write_padded(struct feat_fd *fd, const void *bf,
155 size_t count, size_t count_aligned);
158 * arch specific callback
160 int get_cpuid(char *buffer, size_t sz);
162 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
163 int strcmp_cpuid_str(const char *s1, const char *s2);
164 #endif /* __PERF_HEADER_H */