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

[Li Zhang]

On 2013年05月08日 23:53, fred.konrad at greensocs.com wrote:
>> On 05/07/2013 07:50 PM, Paolo Bonzini wrote:
>>> Il 07/05/2013 09:20, Li Zhang ha scritto:
>>>> Hi all,
> Hi,
>>>> When we use the latest version of QEMU to build ovirt,
>>>> we get this error reported from libvirt.
>>> What QEMU commit is this?
>>
>> b3e6d591b05538056d665572f3e3bbfb3cbb70e7
> This commit is from 05/29 no?
>
> there were issues with that. But it should be fixed.
>
> Do you still have the command-line issue with the last git?
>
> See commit 80270a19685dd20eda017b0360c743b3e3ed6f57

Hi Fred,

This patch is to change bus which can be compatible with old version, right?
But I saw the current name is still different from old version.

The current name is: "virtio-serial-bus0.0"
The old version is: "virtio-serial0.0"

Is it possible to change it back to the old name?

Thanks. :)
--Li
>
> Thanks,
> Fred
>
>>
>>> 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
>>
>>
>>