1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __PERF_HEADER_H 3 #define __PERF_HEADER_H 4 5 #include <linux/stddef.h> 6 #include <linux/perf_event.h> 7 #include <sys/types.h> 8 #include <stdio.h> // FILE 9 #include <stdbool.h> 10 #include <linux/bitmap.h> 11 #include <linux/types.h> 12 #include "env.h" 13 #include "pmu.h" 14 15 enum { 16 HEADER_RESERVED = 0, /* always cleared */ 17 HEADER_FIRST_FEATURE = 1, 18 HEADER_TRACING_DATA = 1, 19 HEADER_BUILD_ID, 20 21 HEADER_HOSTNAME, 22 HEADER_OSRELEASE, 23 HEADER_VERSION, 24 HEADER_ARCH, 25 HEADER_NRCPUS, 26 HEADER_CPUDESC, 27 HEADER_CPUID, 28 HEADER_TOTAL_MEM, 29 HEADER_CMDLINE, 30 HEADER_EVENT_DESC, 31 HEADER_CPU_TOPOLOGY, 32 HEADER_NUMA_TOPOLOGY, 33 HEADER_BRANCH_STACK, 34 HEADER_PMU_MAPPINGS, 35 HEADER_GROUP_DESC, 36 HEADER_AUXTRACE, 37 HEADER_STAT, 38 HEADER_CACHE, 39 HEADER_SAMPLE_TIME, 40 HEADER_MEM_TOPOLOGY, 41 HEADER_CLOCKID, 42 HEADER_DIR_FORMAT, 43 HEADER_BPF_PROG_INFO, 44 HEADER_BPF_BTF, 45 HEADER_COMPRESSED, 46 HEADER_CPU_PMU_CAPS, 47 HEADER_CLOCK_DATA, 48 HEADER_HYBRID_TOPOLOGY, 49 HEADER_PMU_CAPS, 50 HEADER_LAST_FEATURE, 51 HEADER_FEAT_BITS = 256, 52 }; 53 54 enum perf_header_version { 55 PERF_HEADER_VERSION_1, 56 PERF_HEADER_VERSION_2, 57 }; 58 59 struct perf_file_section { 60 u64 offset; 61 u64 size; 62 }; 63 64 struct perf_file_header { 65 u64 magic; 66 u64 size; 67 u64 attr_size; 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); 73 }; 74 75 struct perf_pipe_file_header { 76 u64 magic; 77 u64 size; 78 }; 79 80 struct perf_header; 81 82 int perf_file_header__read(struct perf_file_header *header, 83 struct perf_header *ph, int fd); 84 85 struct perf_header { 86 enum perf_header_version version; 87 bool needs_swap; 88 u64 data_offset; 89 u64 data_size; 90 u64 feat_offset; 91 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 92 struct perf_env env; 93 }; 94 95 struct feat_fd { 96 struct perf_header *ph; 97 int fd; 98 void *buf; /* Either buf != NULL or fd >= 0 */ 99 ssize_t offset; 100 size_t size; 101 struct evsel *events; 102 }; 103 104 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); 108 const char *name; 109 bool full_only; 110 bool synthesize; 111 }; 112 113 struct evlist; 114 struct perf_session; 115 struct perf_tool; 116 union perf_event; 117 118 extern const char perf_version_string[]; 119 120 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); 125 126 /* feat_writer writes a feature section to output */ 127 struct feat_writer { 128 int (*write)(struct feat_writer *fw, void *buf, size_t sz); 129 }; 130 131 /* feat_copier copies a feature section using feat_writer to output */ 132 struct feat_copier { 133 int (*copy)(struct feat_copier *fc, int feat, struct feat_writer *fw); 134 }; 135 136 int perf_session__inject_header(struct perf_session *session, 137 struct evlist *evlist, 138 int fd, 139 struct feat_copier *fc); 140 141 size_t perf_session__data_offset(const struct evlist *evlist); 142 143 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); 146 147 int perf_header__set_cmdline(int argc, const char **argv); 148 149 int perf_header__process_sections(struct perf_header *header, int fd, 150 void *data, 151 int (*process)(struct perf_file_section *section, 152 struct perf_header *ph, 153 int feat, int fd, void *data)); 154 155 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); 156 157 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); 168 #endif 169 int perf_event__process_build_id(struct perf_session *session, 170 union perf_event *event); 171 bool is_perf_magic(u64 magic); 172 173 #define NAME_ALIGN 64 174 175 struct feat_fd; 176 177 int do_write(struct feat_fd *fd, const void *buf, size_t size); 178 179 int write_padded(struct feat_fd *fd, const void *bf, 180 size_t count, size_t count_aligned); 181 182 int is_cpu_online(unsigned int cpu); 183 /* 184 * arch specific callback 185 */ 186 int get_cpuid(char *buffer, size_t sz); 187 188 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); 189 int strcmp_cpuid_str(const char *s1, const char *s2); 190 #endif /* __PERF_HEADER_H */ 191