tools/perf/util/kvm-stat.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "debug.h"
   3 #include "evsel.h"
   4 #include "kvm-stat.h"
   5
   6 #if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
   7
   8 bool kvm_exit_event(struct evsel *evsel)
   9 {
  10         return evsel__name_is(evsel, kvm_exit_trace);
  11 }
  12
  13 void exit_event_get_key(struct evsel *evsel,
  14                         struct perf_sample *sample,
  15                         struct event_key *key)
  16 {
  17         key->info = 0;
  18         key->key  = evsel__intval(evsel, sample, kvm_exit_reason);
  19 }
  20
  21
  22 bool exit_event_begin(struct evsel *evsel,
  23                       struct perf_sample *sample, struct event_key *key)
  24 {
  25         if (kvm_exit_event(evsel)) {
  26                 exit_event_get_key(evsel, sample, key);
  27                 return true;
  28         }
  29
  30         return false;
  31 }
  32
  33 bool kvm_entry_event(struct evsel *evsel)
  34 {
  35         return evsel__name_is(evsel, kvm_entry_trace);
  36 }
  37
  38 bool exit_event_end(struct evsel *evsel,
  39                     struct perf_sample *sample __maybe_unused,
  40                     struct event_key *key __maybe_unused)
  41 {
  42         return kvm_entry_event(evsel);
  43 }
  44
  45 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
  46                                    struct exit_reasons_table *tbl,
  47                                    u64 exit_code)
  48 {
  49         while (tbl->reason != NULL) {
  50                 if (tbl->exit_code == exit_code)
  51                         return tbl->reason;
  52                 tbl++;
  53         }
  54
  55         pr_err("unknown kvm exit code:%lld on %s\n",
  56                 (unsigned long long)exit_code, kvm->exit_reasons_isa);
  57         return "UNKNOWN";
  58 }
  59
  60 void exit_event_decode_key(struct perf_kvm_stat *kvm,
  61                            struct event_key *key,
  62                            char *decode)
  63 {
  64         const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
  65                                                   key->key);
  66
  67         scnprintf(decode, KVM_EVENT_NAME_LEN, "%s", exit_reason);
  68 }
  69
  70 #endif