Below the bt information:
Below some information about my hypervisor:
root@ubuntu-05:/datapool/zhuohf# virsh -v 3.4.0
root@ubuntu-05:/datapool/zhuohf# qemu-x86_64 -version qemu-x86_64 version 2.9.0 Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers