LXR linux/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
   6#include "../../../util/event.h"
   7#include "../../../util/synthetic-events.h"
   8#include "../../../util/machine.h"
   9#include "../../../util/tool.h"
  10#include "../../../util/map.h"
  11#include "../../../util/debug.h"
  12
  13#if defined(__x86_64__)
  14
  15int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
  16                                       perf_event__handler_t process,
  17                                       struct machine *machine)
  18{
  19        int rc = 0;
  20        struct map *pos;
  21        struct maps *kmaps = &machine->kmaps;
  22        union perf_event *event = zalloc(sizeof(event->mmap) +
  23                                         machine->id_hdr_size);
  24
  25        if (!event) {
  26                pr_debug("Not enough memory synthesizing mmap event "
  27                         "for extra kernel maps\n");
  28                return -1;
  29        }
  30
  31        maps__for_each_entry(kmaps, pos) {
  32                struct kmap *kmap;
  33                size_t size;
  34
  35                if (!__map__is_extra_kernel_map(pos))
  36                        continue;
  37
  38                kmap = map__kmap(pos);
  39
  40                size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
  41                       PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
  42                       machine->id_hdr_size;
  43
  44                memset(event, 0, size);
  45
  46                event->mmap.header.type = PERF_RECORD_MMAP;
  47
  48                /*
  49                 * kernel uses 0 for user space maps, see kernel/perf_event.c
  50                 * __perf_event_mmap
  51                 */
  52                if (machine__is_host(machine))
  53                        event->header.misc = PERF_RECORD_MISC_KERNEL;
  54                else
  55                        event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
  56
  57                event->mmap.header.size = size;
  58
  59                event->mmap.start = pos->start;
  60                event->mmap.len   = pos->end - pos->start;
  61                event->mmap.pgoff = pos->pgoff;
  62                event->mmap.pid   = machine->pid;
  63
  64                strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
  65
  66                if (perf_tool__process_synth_event(tool, event, machine,
  67                                                   process) != 0) {
  68                        rc = -1;
  69                        break;
  70                }
  71        }
  72
  73        free(event);
  74        return rc;
  75}
  76
  77#endif
  78
  79void arch_perf_parse_sample_weight(struct perf_sample *data,
  80                                   const __u64 *array, u64 type)
  81{
  82        union perf_sample_weight weight;
  83
  84        weight.full = *array;
  85        if (type & PERF_SAMPLE_WEIGHT)
  86                data->weight = weight.full;
  87        else {
  88                data->weight = weight.var1_dw;
  89                data->ins_lat = weight.var2_w;
  90        }
  91}
  92
  93void arch_perf_synthesize_sample_weight(const struct perf_sample *data,
  94                                        __u64 *array, u64 type)
  95{
  96        *array = data->weight;
  97
  98        if (type & PERF_SAMPLE_WEIGHT_STRUCT) {
  99                *array &= 0xffffffff;
 100                *array |= ((u64)data->ins_lat << 32);
 101        }
 102}
 103