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_HYBRID_TOPOLOGY,
51 HEADER_FEAT_BITS = 256,
54 enum perf_header_version {
55 PERF_HEADER_VERSION_1,
56 PERF_HEADER_VERSION_2,
59 struct perf_file_section {
64 struct perf_file_header {
68 struct perf_file_section attrs;
69 struct perf_file_section data;
70 /* event_types is ignored */
71 struct perf_file_section event_types;
72 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
75 struct perf_pipe_file_header {
82 int perf_file_header__read(struct perf_file_header *header,
83 struct perf_header *ph, int fd);
86 enum perf_header_version version;
91 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
96 struct perf_header *ph;
98 void *buf; /* Either buf != NULL or fd >= 0 */
101 struct evsel *events;
104 struct perf_header_feature_ops {
105 int (*write)(struct feat_fd *ff, struct evlist *evlist);
106 void (*print)(struct feat_fd *ff, FILE *fp);
107 int (*process)(struct feat_fd *ff, void *data);
118 extern const char perf_version_string[];
120 int perf_session__read_header(struct perf_session *session, int repipe_fd);
121 int perf_session__write_header(struct perf_session *session,
122 struct evlist *evlist,
123 int fd, bool at_exit);
124 int perf_header__write_pipe(int fd);
126 /* feat_writer writes a feature section to output */
128 int (*write)(struct feat_writer *fw, void *buf, size_t sz);
131 /* feat_copier copies a feature section using feat_writer to output */
133 int (*copy)(struct feat_copier *fc, int feat, struct feat_writer *fw);
136 int perf_session__inject_header(struct perf_session *session,
137 struct evlist *evlist,
139 struct feat_copier *fc);
141 size_t perf_session__data_offset(const struct evlist *evlist);
143 void perf_header__set_feat(struct perf_header *header, int feat);
144 void perf_header__clear_feat(struct perf_header *header, int feat);
145 bool perf_header__has_feat(const struct perf_header *header, int feat);
147 int perf_header__set_cmdline(int argc, const char **argv);
149 int perf_header__process_sections(struct perf_header *header, int fd,
151 int (*process)(struct perf_file_section *section,
152 struct perf_header *ph,
153 int feat, int fd, void *data));
155 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
157 int perf_event__process_feature(struct perf_session *session,
158 union perf_event *event);
159 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
160 struct evlist **pevlist);
161 int perf_event__process_event_update(struct perf_tool *tool,
162 union perf_event *event,
163 struct evlist **pevlist);
164 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
165 #ifdef HAVE_LIBTRACEEVENT
166 int perf_event__process_tracing_data(struct perf_session *session,
167 union perf_event *event);
169 int perf_event__process_build_id(struct perf_session *session,
170 union perf_event *event);
171 bool is_perf_magic(u64 magic);
173 #define NAME_ALIGN 64
177 int do_write(struct feat_fd *fd, const void *buf, size_t size);
179 int write_padded(struct feat_fd *fd, const void *bf,
180 size_t count, size_t count_aligned);
182 #define MAX_CACHE_LVL 4
184 int is_cpu_online(unsigned int cpu);
185 int build_caches_for_cpu(u32 cpu, struct cpu_cache_level caches[], u32 *cntp);
188 * arch specific callback
190 int get_cpuid(char *buffer, size_t sz);
192 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
193 int strcmp_cpuid_str(const char *s1, const char *s2);
194 #endif /* __PERF_HEADER_H */