tools/perf/util/header.h

   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 <stdbool.h>
   9 #include <linux/bitmap.h>
  10 #include <linux/types.h>
  11 #include "event.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 enum perf_dir_version {
  56         PERF_DIR_VERSION        = 1,
  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 evlist;
  96 struct perf_session;
  97
  98 int perf_session__read_header(struct perf_session *session);
  99 int perf_session__write_header(struct perf_session *session,
 100                                struct evlist *evlist,
 101                                int fd, bool at_exit);
 102 int perf_header__write_pipe(int fd);
 103
 104 void perf_header__set_feat(struct perf_header *header, int feat);
 105 void perf_header__clear_feat(struct perf_header *header, int feat);
 106 bool perf_header__has_feat(const struct perf_header *header, int feat);
 107
 108 int perf_header__set_cmdline(int argc, const char **argv);
 109
 110 int perf_header__process_sections(struct perf_header *header, int fd,
 111                                   void *data,
 112                                   int (*process)(struct perf_file_section *section,
 113                                   struct perf_header *ph,
 114                                   int feat, int fd, void *data));
 115
 116 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
 117
 118 int perf_event__synthesize_features(struct perf_tool *tool,
 119                                     struct perf_session *session,
 120                                     struct evlist *evlist,
 121                                     perf_event__handler_t process);
 122
 123 int perf_event__synthesize_extra_attr(struct perf_tool *tool,
 124                                       struct evlist *evsel_list,
 125                                       perf_event__handler_t process,
 126                                       bool is_pipe);
 127
 128 int perf_event__process_feature(struct perf_session *session,
 129                                 union perf_event *event);
 130
 131 int perf_event__synthesize_attr(struct perf_tool *tool,
 132                                 struct perf_event_attr *attr, u32 ids, u64 *id,
 133                                 perf_event__handler_t process);
 134 int perf_event__synthesize_attrs(struct perf_tool *tool,
 135                                  struct evlist *evlist,
 136                                  perf_event__handler_t process);
 137 int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
 138                                              struct evsel *evsel,
 139                                              perf_event__handler_t process);
 140 int perf_event__synthesize_event_update_scale(struct perf_tool *tool,
 141                                               struct evsel *evsel,
 142                                               perf_event__handler_t process);
 143 int perf_event__synthesize_event_update_name(struct perf_tool *tool,
 144                                              struct evsel *evsel,
 145                                              perf_event__handler_t process);
 146 int perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
 147                                              struct evsel *evsel,
 148                                              perf_event__handler_t process);
 149 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
 150                              struct evlist **pevlist);
 151 int perf_event__process_event_update(struct perf_tool *tool,
 152                                      union perf_event *event,
 153                                      struct evlist **pevlist);
 154 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp);
 155
 156 int perf_event__synthesize_tracing_data(struct perf_tool *tool,
 157                                         int fd, struct evlist *evlist,
 158                                         perf_event__handler_t process);
 159 int perf_event__process_tracing_data(struct perf_session *session,
 160                                      union perf_event *event);
 161
 162 int perf_event__synthesize_build_id(struct perf_tool *tool,
 163                                     struct dso *pos, u16 misc,
 164                                     perf_event__handler_t process,
 165                                     struct machine *machine);
 166 int perf_event__process_build_id(struct perf_session *session,
 167                                  union perf_event *event);
 168 bool is_perf_magic(u64 magic);
 169
 170 #define NAME_ALIGN 64
 171
 172 struct feat_fd;
 173
 174 int do_write(struct feat_fd *fd, const void *buf, size_t size);
 175
 176 int write_padded(struct feat_fd *fd, const void *bf,
 177                  size_t count, size_t count_aligned);
 178
 179 /*
 180  * arch specific callback
 181  */
 182 int get_cpuid(char *buffer, size_t sz);
 183
 184 char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused);
 185 int strcmp_cpuid_str(const char *s1, const char *s2);
 186 #endif /* __PERF_HEADER_H */