This patch enable us to know exit reason of KVM_RUN. It will help us
know where the trouble is caused.
Signed-off-by: NKazuya Saito <saito.kazuya@jp.fujitsu.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>