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Date: Tue, 07 May 2013 11:50:23 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [libvirt]virtio serial device problem
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To: Li Zhang <zhlcindy@gmail.com>
Cc: "libvir-list@redhat.com" <libvir-list@redhat.com>, Pradipta Kumar Banerjee <bpradip@in.ibm.com>, Alexey Kardashevskiy <aik@au1.ibm.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, David Gibson <dwg@au1.ibm.com>

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?

It might have been fixed already.

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
> 
> 
>