tools/perf/arch/x86/util/event.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/string.h>
   4 #include <linux/zalloc.h>
   5 #include <stdlib.h>
   6
   7 #include "../../../util/event.h"
   8 #include "../../../util/synthetic-events.h"
   9 #include "../../../util/machine.h"
  10 #include "../../../util/tool.h"
  11 #include "../../../util/map.h"
  12 #include "../../../util/debug.h"
  13 #include "util/sample.h"
  14
  15 #if defined(__x86_64__)
  16
  17 struct perf_event__synthesize_extra_kmaps_cb_args {
  18         const struct perf_tool *tool;
  19         perf_event__handler_t process;
  20         struct machine *machine;
  21         union perf_event *event;
  22 };
  23
  24 static int perf_event__synthesize_extra_kmaps_cb(struct map *map, void *data)
  25 {
  26         struct perf_event__synthesize_extra_kmaps_cb_args *args = data;
  27         union perf_event *event = args->event;
  28         struct kmap *kmap;
  29         size_t size;
  30
  31         if (!__map__is_extra_kernel_map(map))
  32                 return 0;
  33
  34         kmap = map__kmap(map);
  35
  36         size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
  37                       PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
  38                       args->machine->id_hdr_size;
  39
  40         memset(event, 0, size);
  41
  42         event->mmap.header.type = PERF_RECORD_MMAP;
  43
  44         /*
  45          * kernel uses 0 for user space maps, see kernel/perf_event.c
  46          * __perf_event_mmap
  47          */
  48         if (machine__is_host(args->machine))
  49                 event->header.misc = PERF_RECORD_MISC_KERNEL;
  50         else
  51                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
  52
  53         event->mmap.header.size = size;
  54
  55         event->mmap.start = map__start(map);
  56         event->mmap.len   = map__size(map);
  57         event->mmap.pgoff = map__pgoff(map);
  58         event->mmap.pid   = args->machine->pid;
  59
  60         strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
  61
  62         if (perf_tool__process_synth_event(args->tool, event, args->machine, args->process) != 0)
  63                 return -1;
  64
  65         return 0;
  66 }
  67
  68 int perf_event__synthesize_extra_kmaps(const struct perf_tool *tool,
  69                                        perf_event__handler_t process,
  70                                        struct machine *machine)
  71 {
  72         int rc;
  73         struct maps *kmaps = machine__kernel_maps(machine);
  74         struct perf_event__synthesize_extra_kmaps_cb_args args = {
  75                 .tool = tool,
  76                 .process = process,
  77                 .machine = machine,
  78                 .event = zalloc(sizeof(args.event->mmap) + machine->id_hdr_size),
  79         };
  80
  81         if (!args.event) {
  82                 pr_debug("Not enough memory synthesizing mmap event "
  83                          "for extra kernel maps\n");
  84                 return -1;
  85         }
  86
  87         rc = maps__for_each_map(kmaps, perf_event__synthesize_extra_kmaps_cb, &args);
  88
  89         free(args.event);
  90         return rc;
  91 }
  92
  93 #endif
  94
  95 void arch_perf_parse_sample_weight(struct perf_sample *data,
  96                                    const __u64 *array, u64 type)
  97 {
  98         union perf_sample_weight weight;
  99
 100         weight.full = *array;
 101         if (type & PERF_SAMPLE_WEIGHT)
 102                 data->weight = weight.full;
 103         else {
 104                 data->weight = weight.var1_dw;
 105                 data->ins_lat = weight.var2_w;
 106                 data->retire_lat = weight.var3_w;
 107         }
 108 }
 109
 110 void arch_perf_synthesize_sample_weight(const struct perf_sample *data,
 111                                         __u64 *array, u64 type)
 112 {
 113         *array = data->weight;
 114
 115         if (type & PERF_SAMPLE_WEIGHT_STRUCT) {
 116                 *array &= 0xffffffff;
 117                 *array |= ((u64)data->ins_lat << 32);
 118                 *array |= ((u64)data->retire_lat << 48);
 119         }
 120 }
 121
 122 const char *arch_perf_header_entry(const char *se_header)
 123 {
 124         if (!strcmp(se_header, "Local Pipeline Stage Cycle"))
 125                 return "Local Retire Latency";
 126         else if (!strcmp(se_header, "Pipeline Stage Cycle"))
 127                 return "Retire Latency";
 128
 129         return se_header;
 130 }
 131
 132 int arch_support_sort_key(const char *sort_key)
 133 {
 134         if (!strcmp(sort_key, "p_stage_cyc"))
 135                 return 1;
 136         if (!strcmp(sort_key, "local_p_stage_cyc"))
 137                 return 1;
 138         return 0;
 139 }