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_LAST_FEATURE, 48 HEADER_FEAT_BITS = 256, 49 }; 50 51 enum perf_header_version { 52 PERF_HEADER_VERSION_1, 53 PERF_HEADER_VERSION_2, 54 }; 55 56 struct perf_file_section { 57 u64 offset; 58 u64 size; 59 }; 60 61 struct perf_file_header { 62 u64 magic; 63 u64 size; 64 u64 attr_size; 65 struct perf_file_section attrs; 66 struct perf_file_section data; 67 /* event_types is ignored */ 68 struct perf_file_section event_types; 69 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 70 }; 71 72 struct perf_pipe_file_header { 73 u64 magic; 74 u64 size; 75 }; 76 77 struct perf_header; 78 79 int perf_file_header__read(struct perf_file_header *header, 80 struct perf_header *ph, int fd); 81 82 struct perf_header { 83 enum perf_header_version version; 84 bool needs_swap; 85 u64 data_offset; 86 u64 data_size; 87 u64 feat_offset; 88 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 89 struct perf_env env; 90 }; 91 92 struct feat_fd { 93 struct perf_header *ph; 94 int fd; 95 void *buf; /* Either buf != NULL or fd >= 0 */ 96 ssize_t offset; 97 size_t size; 98 struct evsel *events; 99 }; 100 101 struct perf_header_feature_ops { 102 int (*write)(struct feat_fd *ff, struct evlist *evlist); 103 void (*print)(struct feat_fd *ff, FILE *fp); 104 int (*process)(struct feat_fd *ff, void *data); 105 const char *name; 106 bool full_only; 107 bool synthesize; 108 }; 109 110 struct evlist; 111 struct perf_session; 112 struct perf_tool; 113 union perf_event; 114 115 int perf_session__read_header(struct perf_session *session); 116 int perf_session__write_header(struct perf_session *session, 117 struct evlist *evlist, 118 int fd, bool at_exit); 119 int perf_header__write_pipe(int fd); 120 121 void perf_header__set_feat(struct perf_header *header, int feat); 122 void perf_header__clear_feat(struct perf_header *header, int feat); 123 bool perf_header__has_feat(const struct perf_header *header, int feat); 124 125 int perf_header__set_cmdline(int argc, const char **argv); 126 127 int perf_header__process_sections(struct perf_header *header, int fd, 128 void *data, 129 int (*process)(struct perf_file_section *section, 130 struct perf_header *ph, 131 int feat, int fd, void *data)); 132 133 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); 134 135 int perf_event__process_feature(struct perf_session *session, 136 union perf_event *event); 137 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event, 138 struct evlist **pevlist); 139 int perf_event__process_event_update(struct perf_tool *tool, 140 union perf_event *event, 141 struct evlist **pevlist); 142 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp); 143 int perf_event__process_tracing_data(struct perf_session *session, 144 union perf_event *event); 145 int perf_event__process_build_id(struct perf_session *session, 146 union perf_event *event); 147 bool is_perf_magic(u64 magic); 148 149 #define NAME_ALIGN 64 150 151 struct feat_fd; 152 153 int do_write(struct feat_fd *fd, const void *buf, size_t size); 154 155 int write_padded(struct feat_fd *fd, const void *bf, 156 size_t count, size_t count_aligned); 157 158 /* 159 * arch specific callback 160 */ 161 int get_cpuid(char *buffer, size_t sz); 162 163 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); 164 int strcmp_cpuid_str(const char *s1, const char *s2); 165 #endif /* __PERF_HEADER_H */ 166