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