kernel/tools/perf/arch/x86/util/kvm-stat.c

   1 #include "../../util/kvm-stat.h"
   2 #include <asm/kvm_perf.h>
   3
   4 define_exit_reasons_table(vmx_exit_reasons, VMX_EXIT_REASONS);
   5 define_exit_reasons_table(svm_exit_reasons, SVM_EXIT_REASONS);
   6
   7 static struct kvm_events_ops exit_events = {
   8         .is_begin_event = exit_event_begin,
   9         .is_end_event = exit_event_end,
  10         .decode_key = exit_event_decode_key,
  11         .name = "VM-EXIT"
  12 };
  13
  14 /*
  15  * For the mmio events, we treat:
  16  * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
  17  * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
  18  */
  19 static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample,
  20                                struct event_key *key)
  21 {
  22         key->key  = perf_evsel__intval(evsel, sample, "gpa");
  23         key->info = perf_evsel__intval(evsel, sample, "type");
  24 }
  25
  26 #define KVM_TRACE_MMIO_READ_UNSATISFIED 0
  27 #define KVM_TRACE_MMIO_READ 1
  28 #define KVM_TRACE_MMIO_WRITE 2
  29
  30 static bool mmio_event_begin(struct perf_evsel *evsel,
  31                              struct perf_sample *sample, struct event_key *key)
  32 {
  33         /* MMIO read begin event in kernel. */
  34         if (kvm_exit_event(evsel))
  35                 return true;
  36
  37         /* MMIO write begin event in kernel. */
  38         if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
  39             perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
  40                 mmio_event_get_key(evsel, sample, key);
  41                 return true;
  42         }
  43
  44         return false;
  45 }
  46
  47 static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample,
  48                            struct event_key *key)
  49 {
  50         /* MMIO write end event in kernel. */
  51         if (kvm_entry_event(evsel))
  52                 return true;
  53
  54         /* MMIO read end event in kernel.*/
  55         if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
  56             perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
  57                 mmio_event_get_key(evsel, sample, key);
  58                 return true;
  59         }
  60
  61         return false;
  62 }
  63
  64 static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
  65                                   struct event_key *key,
  66                                   char *decode)
  67 {
  68         scnprintf(decode, DECODE_STR_LEN, "%#lx:%s",
  69                   (unsigned long)key->key,
  70                   key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
  71 }
  72
  73 static struct kvm_events_ops mmio_events = {
  74         .is_begin_event = mmio_event_begin,
  75         .is_end_event = mmio_event_end,
  76         .decode_key = mmio_event_decode_key,
  77         .name = "MMIO Access"
  78 };
  79
  80  /* The time of emulation pio access is from kvm_pio to kvm_entry. */
  81 static void ioport_event_get_key(struct perf_evsel *evsel,
  82                                  struct perf_sample *sample,
  83                                  struct event_key *key)
  84 {
  85         key->key  = perf_evsel__intval(evsel, sample, "port");
  86         key->info = perf_evsel__intval(evsel, sample, "rw");
  87 }
  88
  89 static bool ioport_event_begin(struct perf_evsel *evsel,
  90                                struct perf_sample *sample,
  91                                struct event_key *key)
  92 {
  93         if (!strcmp(evsel->name, "kvm:kvm_pio")) {
  94                 ioport_event_get_key(evsel, sample, key);
  95                 return true;
  96         }
  97
  98         return false;
  99 }
 100
 101 static bool ioport_event_end(struct perf_evsel *evsel,
 102                              struct perf_sample *sample __maybe_unused,
 103                              struct event_key *key __maybe_unused)
 104 {
 105         return kvm_entry_event(evsel);
 106 }
 107
 108 static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
 109                                     struct event_key *key,
 110                                     char *decode)
 111 {
 112         scnprintf(decode, DECODE_STR_LEN, "%#llx:%s",
 113                   (unsigned long long)key->key,
 114                   key->info ? "POUT" : "PIN");
 115 }
 116
 117 static struct kvm_events_ops ioport_events = {
 118         .is_begin_event = ioport_event_begin,
 119         .is_end_event = ioport_event_end,
 120         .decode_key = ioport_event_decode_key,
 121         .name = "IO Port Access"
 122 };
 123
 124 const char * const kvm_events_tp[] = {
 125         "kvm:kvm_entry",
 126         "kvm:kvm_exit",
 127         "kvm:kvm_mmio",
 128         "kvm:kvm_pio",
 129         NULL,
 130 };
 131
 132 struct kvm_reg_events_ops kvm_reg_events_ops[] = {
 133         { .name = "vmexit", .ops = &exit_events },
 134         { .name = "mmio", .ops = &mmio_events },
 135         { .name = "ioport", .ops = &ioport_events },
 136         { NULL, NULL },
 137 };
 138
 139 const char * const kvm_skip_events[] = {
 140         "HLT",
 141         NULL,
 142 };
 143
 144 int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
 145 {
 146         if (strstr(cpuid, "Intel")) {
 147                 kvm->exit_reasons = vmx_exit_reasons;
 148                 kvm->exit_reasons_isa = "VMX";
 149         } else if (strstr(cpuid, "AMD")) {
 150                 kvm->exit_reasons = svm_exit_reasons;
 151                 kvm->exit_reasons_isa = "SVM";
 152         } else
 153                 return -ENOTSUP;
 154
 155         return 0;
 156 }