[libvirt-users] the error for define the xml

Hi, everyone, I have already install libvirt. I want to use it on qemu. I have set up qemu too. I do not know how to let libvirt manage the vms for qemu. What i did ist that: 1) create the xml under /etc/libvirt/qemu/demo.xml 2) # virsh define /etc/libvirt/qemu/demo.xml There is error as following: error: Failed to define domain from /etc/libvirt/qemu/demo.xml error: internal error No guest options available for arch 'x86_64' Could everyone help me? Thank you very much. The demo.xml is following: <domain type='kvm'> <name>test</name> //\u865a\u62df\u673a\u540d\u79f0 <memory>1048576</memory> //\u6700\u5927\u5185\u5b58\uff0c\u5355\u4f4dk <currentMemory>1048576</currentMemory> //\u53ef\u7528\u5185\u5b58\uff0c\u5355\u4f4dk <vcpu>8</vcpu> //\u865a\u62dfcpu\u4e2a\u6570 <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='cdrom'/> //\u5149\u76d8\u542f\u52a8 </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/libvirt/images/winxpsp3-regression.qcow2'/> //\u76ee\u7684\u955c\u50cf\u8def\u5f84 <target dev='hda' bus='ide'/> </disk> <disk type='file' device='cdrom'> <source file='/var/lib/libvirt/images/ubuntu.iso'/> //\u5149\u76d8\u955c\u50cf\u8def\u5f84 <target dev='hdb' bus='ide'/> </disk> <interface type='bridge'> //\u865a\u62df\u673a\u7f51\u7edc\u8fde\u63a5\u65b9\u5f0f <source bridge='kvmbr0'/> //\u5f53\u524d\u4e3b\u673a\u7f51\u6865\u7684\u540d\u79f0 <mac address="00:16:3e:5d:aa:a8"/> //\u4e3a\u865a\u62df\u673a\u5206\u914dmac\u5730\u5740\uff0c\u52a1\u5fc5\u552f\u4e00\uff0c\u5426\u5219dhcp\u83b7\u5f97\u540c\u6837ip,\u5f15\u8d77\u51b2\u7a81 </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' listen = '0.0.0.0' keymap='en-us'/>//vnc\u65b9\u5f0f\u767b\u5f55\uff0c\u7aef\u53e3\u53f7\u81ea\u52a8\u5206\u914d\uff0c\u81ea\u52a8\u52a01\uff0c\u53ef\u4ee5\u901a\u8fc7virsh vncdisplay\u6765\u67e5\u8be2 </devices> </domain> -- Have a nice day! Qian