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_LAST_FEATURE, 50 HEADER_FEAT_BITS = 256, 51 }; 52 53 enum perf_header_version { 54 PERF_HEADER_VERSION_1, 55 PERF_HEADER_VERSION_2, 56 }; 57 58 struct perf_file_section { 59 u64 offset; 60 u64 size; 61 }; 62 63 struct perf_file_header { 64 u64 magic; 65 u64 size; 66 u64 attr_size; 67 struct perf_file_section attrs; 68 struct perf_file_section data; 69 /* event_types is ignored */ 70 struct perf_file_section event_types; 71 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 72 }; 73 74 struct perf_pipe_file_header { 75 u64 magic; 76 u64 size; 77 }; 78 79 struct perf_header; 80 81 int perf_file_header__read(struct perf_file_header *header, 82 struct perf_header *ph, int fd); 83 84 struct perf_header { 85 enum perf_header_version version; 86 bool needs_swap; 87 u64 data_offset; 88 u64 data_size; 89 u64 feat_offset; 90 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 91 struct perf_env env; 92 }; 93 94 struct feat_fd { 95 struct perf_header *ph; 96 int fd; 97 void *buf; /* Either buf != NULL or fd >= 0 */ 98 ssize_t offset; 99 size_t size; 100 struct evsel *events; 101 }; 102 103 struct perf_header_feature_ops { 104 int (*write)(struct feat_fd *ff, struct evlist *evlist); 105 void (*print)(struct feat_fd *ff, FILE *fp); 106 int (*process)(struct feat_fd *ff, void *data); 107 const char *name; 108 bool full_only; 109 bool synthesize; 110 }; 111 112 struct evlist; 113 struct perf_session; 114 struct perf_tool; 115 union perf_event; 116 117 int perf_session__read_header(struct perf_session *session); 118 int perf_session__write_header(struct perf_session *session, 119 struct evlist *evlist, 120 int fd, bool at_exit); 121 int perf_header__write_pipe(int fd); 122 123 void perf_header__set_feat(struct perf_header *header, int feat); 124 void perf_header__clear_feat(struct perf_header *header, int feat); 125 bool perf_header__has_feat(const struct perf_header *header, int feat); 126 127 int perf_header__set_cmdline(int argc, const char **argv); 128 129 int perf_header__process_sections(struct perf_header *header, int fd, 130 void *data, 131 int (*process)(struct perf_file_section *section, 132 struct perf_header *ph, 133 int feat, int fd, void *data)); 134 135 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); 136 137 int perf_event__process_feature(struct perf_session *session, 138 union perf_event *event); 139 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event, 140 struct evlist **pevlist); 141 int perf_event__process_event_update(struct perf_tool *tool, 142 union perf_event *event, 143 struct evlist **pevlist); 144 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp); 145 int perf_event__process_tracing_data(struct perf_session *session, 146 union perf_event *event); 147 int perf_event__process_build_id(struct perf_session *session, 148 union perf_event *event); 149 bool is_perf_magic(u64 magic); 150 151 #define NAME_ALIGN 64 152 153 struct feat_fd; 154 155 int do_write(struct feat_fd *fd, const void *buf, size_t size); 156 157 int write_padded(struct feat_fd *fd, const void *bf, 158 size_t count, size_t count_aligned); 159 160 /* 161 * arch specific callback 162 */ 163 int get_cpuid(char *buffer, size_t sz); 164 165 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); 166 int strcmp_cpuid_str(const char *s1, const char *s2); 167 #endif /* __PERF_HEADER_H */ 168