[libvirt] virtio serial device problem

[Alexey Kardashevskiy]

On 05/07/2013 07:50 PM, Paolo Bonzini wrote:
> Il 07/05/2013 09:20, Li Zhang ha scritto:
>> Hi all,
>>
>> When we use the latest version of QEMU to build ovirt,
>> we get this error reported from libvirt.
> 
> What QEMU commit is this?


b3e6d591b05538056d665572f3e3bbfb3cbb70e7


> It might have been fixed already.

Hm. From what I see, it is all correct from the qemu side, the problem is
in libvirt which does not know about "virtio-pci-bus" yet.



> Paolo
> 
>>
>> 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
>>
>>
>>


-- 
Alexey Kardashevskiy
IBM OzLabs, LTC Team

e-mail: aik at au1.ibm.com
notes: Alexey Kardashevskiy/Australia/IBM