[libvirt] [Qemu-devel]virtio serial device problem

Hi all, When we use the latest version of QEMU to build ovirt, we get this error reported from libvirt. qemu-system-ppc64: -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm: Bus 'virtio-serial0.0' is full qemu-system-ppc64: -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm: Bus 'virtio-serial0.0' not found Libvirt helps create QEMU command line and put virtserialport device to bus virtio-serial0.0. For latest version of QEMU, the bus type is changed. (qemu) info qtree bus: main-system-bus type System dev: spapr-pci-host-bridge, id "" index = 0 buid = 0x800000020000000 liobn = 0x80000000 mem_win_addr = 0x100a0000000 mem_win_size = 0x20000000 io_win_addr = 0x10080000000 io_win_size = 0x10000 msi_win_addr = 0x10090000000 irq 0 bus: pci type PCI dev: virtio-serial-pci, id "virtio-serial0" ioeventfd = on vectors = 2 class = 0x780 indirect_desc = on event_idx = on max_ports = 31 addr = 03.0 romfile = <null> rombar = 1 multifunction = off command_serr_enable = on class Class 0780, addr 00:03.0, pci id 1af4:1003 (sub 1af4:0003) bar 0: i/o at 0xffffffffffffffff [0x1e] bar 1: mem at 0xffffffffffffffff [0xffe] bus: virtio-serial0.0 type virtio-pci-bus dev: virtio-serial-device, id "" max_ports = 31 bus: virtio-serial-bus.0 type virtio-serial-bus dev: virtserialport, id "channel1" chardev = charchannel1 nr = 2 name = "org.qemu.guest_agent.0" port 2, guest off, host off, throttle off dev: virtserialport, id "channel0" chardev = charchannel0 nr = 1 name = "com.redhat.rhevm.vdsm" port 1, guest off, host off, throttle off But we tried to replace virtio-serial0.0 with virtio-serial-bus.0, SLOF crashes. It still doesn't work at all. Does anyone know how to use virtserialport in QEMU command line? If configuration is changed in QEMU, libvirt also needs to change it accordingly. Thanks. :) --Li