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_LAST_FEATURE, 47 HEADER_FEAT_BITS = 256, 48 }; 49 50 enum perf_header_version { 51 PERF_HEADER_VERSION_1, 52 PERF_HEADER_VERSION_2, 53 }; 54 55 struct perf_file_section { 56 u64 offset; 57 u64 size; 58 }; 59 60 struct perf_file_header { 61 u64 magic; 62 u64 size; 63 u64 attr_size; 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); 69 }; 70 71 struct perf_pipe_file_header { 72 u64 magic; 73 u64 size; 74 }; 75 76 struct perf_header; 77 78 int perf_file_header__read(struct perf_file_header *header, 79 struct perf_header *ph, int fd); 80 81 struct perf_header { 82 enum perf_header_version version; 83 bool needs_swap; 84 u64 data_offset; 85 u64 data_size; 86 u64 feat_offset; 87 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 88 struct perf_env env; 89 }; 90 91 struct feat_fd { 92 struct perf_header *ph; 93 int fd; 94 void *buf; /* Either buf != NULL or fd >= 0 */ 95 ssize_t offset; 96 size_t size; 97 struct evsel *events; 98 }; 99 100 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); 104 const char *name; 105 bool full_only; 106 bool synthesize; 107 }; 108 109 struct evlist; 110 struct perf_session; 111 struct perf_tool; 112 union perf_event; 113 114 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); 119 120 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); 123 124 int perf_header__set_cmdline(int argc, const char **argv); 125 126 int perf_header__process_sections(struct perf_header *header, int fd, 127 void *data, 128 int (*process)(struct perf_file_section *section, 129 struct perf_header *ph, 130 int feat, int fd, void *data)); 131 132 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); 133 134 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); 147 148 #define NAME_ALIGN 64 149 150 struct feat_fd; 151 152 int do_write(struct feat_fd *fd, const void *buf, size_t size); 153 154 int write_padded(struct feat_fd *fd, const void *bf, 155 size_t count, size_t count_aligned); 156 157 /* 158 * arch specific callback 159 */ 160 int get_cpuid(char *buffer, size_t sz); 161 162 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 */ 165