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_LAST_FEATURE, 49 HEADER_FEAT_BITS = 256, 50 }; 51 52 enum perf_header_version { 53 PERF_HEADER_VERSION_1, 54 PERF_HEADER_VERSION_2, 55 }; 56 57 struct perf_file_section { 58 u64 offset; 59 u64 size; 60 }; 61 62 struct perf_file_header { 63 u64 magic; 64 u64 size; 65 u64 attr_size; 66 struct perf_file_section attrs; 67 struct perf_file_section data; 68 /* event_types is ignored */ 69 struct perf_file_section event_types; 70 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 71 }; 72 73 struct perf_pipe_file_header { 74 u64 magic; 75 u64 size; 76 }; 77 78 struct perf_header; 79 80 int perf_file_header__read(struct perf_file_header *header, 81 struct perf_header *ph, int fd); 82 83 struct perf_header { 84 enum perf_header_version version; 85 bool needs_swap; 86 u64 data_offset; 87 u64 data_size; 88 u64 feat_offset; 89 DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); 90 struct perf_env env; 91 }; 92 93 struct feat_fd { 94 struct perf_header *ph; 95 int fd; 96 void *buf; /* Either buf != NULL or fd >= 0 */ 97 ssize_t offset; 98 size_t size; 99 struct evsel *events; 100 }; 101 102 struct perf_header_feature_ops { 103 int (*write)(struct feat_fd *ff, struct evlist *evlist); 104 void (*print)(struct feat_fd *ff, FILE *fp); 105 int (*process)(struct feat_fd *ff, void *data); 106 const char *name; 107 bool full_only; 108 bool synthesize; 109 }; 110 111 struct evlist; 112 struct perf_session; 113 struct perf_tool; 114 union perf_event; 115 116 int perf_session__read_header(struct perf_session *session); 117 int perf_session__write_header(struct perf_session *session, 118 struct evlist *evlist, 119 int fd, bool at_exit); 120 int perf_header__write_pipe(int fd); 121 122 void perf_header__set_feat(struct perf_header *header, int feat); 123 void perf_header__clear_feat(struct perf_header *header, int feat); 124 bool perf_header__has_feat(const struct perf_header *header, int feat); 125 126 int perf_header__set_cmdline(int argc, const char **argv); 127 128 int perf_header__process_sections(struct perf_header *header, int fd, 129 void *data, 130 int (*process)(struct perf_file_section *section, 131 struct perf_header *ph, 132 int feat, int fd, void *data)); 133 134 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); 135 136 int perf_event__process_feature(struct perf_session *session, 137 union perf_event *event); 138 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event, 139 struct evlist **pevlist); 140 int perf_event__process_event_update(struct perf_tool *tool, 141 union perf_event *event, 142 struct evlist **pevlist); 143 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp); 144 int perf_event__process_tracing_data(struct perf_session *session, 145 union perf_event *event); 146 int perf_event__process_build_id(struct perf_session *session, 147 union perf_event *event); 148 bool is_perf_magic(u64 magic); 149 150 #define NAME_ALIGN 64 151 152 struct feat_fd; 153 154 int do_write(struct feat_fd *fd, const void *buf, size_t size); 155 156 int write_padded(struct feat_fd *fd, const void *bf, 157 size_t count, size_t count_aligned); 158 159 /* 160 * arch specific callback 161 */ 162 int get_cpuid(char *buffer, size_t sz); 163 164 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); 165 int strcmp_cpuid_str(const char *s1, const char *s2); 166 #endif /* __PERF_HEADER_H */ 167