Add tracepoint for userspace exit.
Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
---
ChangeLog:
v1->v2
log error case too.
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 9c2cc6a..c86f4e8 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -6,6 +6,36 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvm
+#define ERSN(x) { KVM_EXIT_##x, "KVM_EXIT_" #x }
+
+#define kvm_trace_exit_reason \
+ ERSN(UNKNOWN), ERSN(EXCEPTION), ERSN(IO), ERSN(HYPERCALL), \
+ ERSN(DEBUG), ERSN(HLT), ERSN(MMIO), ERSN(IRQ_WINDOW_OPEN), \
+ ERSN(SHUTDOWN), ERSN(FAIL_ENTRY), ERSN(INTR), ERSN(SET_TPR), \
+ ERSN(TPR_ACCESS), ERSN(S390_SIEIC), ERSN(S390_RESET), ERSN(DCR),\
+ ERSN(NMI), ERSN(INTERNAL_ERROR), ERSN(OSI)
+
+TRACE_EVENT(kvm_userspace_exit,
+ TP_PROTO(__u32 reason, int errno),
+ TP_ARGS(reason, errno),
+
+ TP_STRUCT__entry(
+ __field( __u32, reason )
+ __field( int, errno )
+ ),
+
+ TP_fast_assign(
+ __entry->reason = reason;
+ __entry->errno = errno;
+ ),
+
+ TP_printk("reason %s (%d)",
+ __entry->errno < 0 ?
+ (__entry->errno == -EINTR ? "restart" : "error") :
+ __print_symbolic(__entry->reason, kvm_trace_exit_reason),
+ __entry->errno < 0 ? -__entry->errno : __entry->reason)
+);
+
#if defined(__KVM_HAVE_IOAPIC)
TRACE_EVENT(kvm_set_irq,
TP_PROTO(unsigned int gsi, int level, int irq_source_id),
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 361ad1a..88c42ae 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1537,6 +1537,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
if (arg)
goto out;
r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
+ trace_kvm_userspace_exit(vcpu->run->exit_reason, r);
break;
case KVM_GET_REGS: {
struct kvm_regs *kvm_regs;
--
Gleb.
--
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