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 <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 */