Hi Daniel, I am unable to start VM Lbvirt Version : Compiled against library: libvir 0.9.13 Using library: libvir 0.9.13 Using API: QEMU 0.9.13 Running hypervisor: QEMU 1.0.0 Here is my command: LC_ALL=C PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin HOME=/home/root USER=root LOGNAME=root /usr/bin/qemu-system-ppc -name new -M ppce500v2 -enable-kvm -m 256 -smp 1,sockets=1,cores=1,threads=1 -uuid eebd22bb-c1db-da23-ca6d-f54c9c23282f -nographic -nodefconfig -nodefaults -rtc base=utc -no-shutdown -kernel /boot/uImage-p2020rdb.bin -initrd /home/root/guest.rootfs.ext2.gz -append "root=/dev/ram rw console=ttyS0,115200" -serial tcp::4444,server,telnet -chardev socket,id=charserial0,host=,port=4444,path=/usr/local/var/lib/libvirt/qemu/new.monitor,server,nowait -device virtio-balloon-pci,id=balloon0 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/usr/local/var/lib/libvirt/qemu/new.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb -netdev tap,script=/home/root/qemu-ifup,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:fa:d4:84 -mem-path /var/lib/hugetlbfs/pagesize-4MB -dtb /usr/share/qemu/ppce500v2.dtb I am able to start VM using above command, but when I convert to xml I unable to start VM XML File: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>new</name> <uuid>eebd22bb-c1db-da23-ca6d-f54c9c23282f</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='ppc' machine='ppce500v2'>hvm</type> <kernel>/boot/uImage-p2020rdb.bin</kernel> <initrd>/home/root/guest.rootfs.ext2.gz</initrd> <cmdline>root=/dev/ram rw console=ttyS0,115200</cmdline> </os> <features> <acpi/> </features> <cpu> <topology sockets='1' cores='1' threads='1'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-ppc</emulator> <serial type='tcp'> <source mode='bind' host='' service='4444'/> <protocol type='raw'/> <target port='0'/> </serial> <console type='tcp'> <source mode='bind' host='' service='4444'/> <protocol type='raw'/> <target type='serial' port='0'/> </console> <memballoon model='virtio'/> </devices> <qemu:commandline> <qemu:arg value='-nodefconfig'/> <qemu:arg value='-nodefaults'/> <qemu:arg value='-rtc'/> <qemu:arg value='base=utc'/> <qemu:arg value='-no-shutdown'/> <qemu:arg value='-chardev'/> <qemu:arg value='socket,id=charserial0,host=,port=4444,path=/usr/local/var/lib/libvirt/qemu/new.monitor,server,nowait'/> <qemu:arg value='-device'/> <qemu:arg value='virtio-balloon-pci,id=balloon0'/> <qemu:arg value='-nodefconfig'/> <qemu:arg value='-nodefaults'/> <qemu:arg value='-chardev'/> <qemu:arg value='socket,id=charmonitor,path=/usr/local/var/lib/libvirt/qemu/new.monitor,server,nowait'/> <qemu:arg value='-mon'/> <qemu:arg value='chardev=charmonitor,id=monitor,mode=control'/> <qemu:arg value='-rtc'/> <qemu:arg value='base=utc'/> <qemu:arg value='-no-shutdown'/> <qemu:arg value='-device'/> <qemu:arg value='piix3-usb-uhci,id=usb'/> <qemu:arg value='-netdev'/> <qemu:arg value='tap,script=/home/root/qemu-ifup,id=hostnet0'/> <qemu:arg value='-device'/> <qemu:arg value='virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:fa:d4:84'/> <qemu:arg value='-mem-path'/> <qemu:arg value='/var/lib/hugetlbfs/pagesize-4MB'/> <qemu:arg value='-dtb'/> <qemu:arg value='/usr/share/qemu/ppce500v2.dtb'/> </qemu:commandline> </domain> Error: "internal error process exited while connecting to monitor: qemu-system-ppc: -dev ice piix3-usb-uhci,id=usb,bus=pci,addr=0x1.0x2: Bus 'pci' not found" Regards, Veera.