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Re: [virt-tools-list] [RFC] add spapr-vio bus for pseries feature



On 01/12/2012 10:11 PM, Li Zhang wrote:
> On 01/13/2012 09:56 AM, Cole Robinson wrote:
>> On 12/22/2011 04:43 AM, Li Zhang wrote:
>>> Hi all,
>>>
>>> For pseries machine, spapr-vio bus is supported.
>>> A lot of devices and controller needs to use spapr-vio bus.
>>> So we need to add such an option in virt-manager for user
>>> to select.
>>>
>>> Now virt-manager only support virtio, which is a generic bus.
>>> spapr-vio is a little different from it.
>>>
>>> Any comments?
>>>
>>> Any suggestion is appreciated.
>>>
>>
>> Can you provide an example of the libvirt xml we are talking about here?
>>
>> Best thing to do might be to just have virtinst default to using that bus if
>> installing a pseries guest. Is it something that can be used unconditionally
>> or does it require guest cooperation like virtio?
>>
>> Thanks,
>> Cole
>>
> 
> Hi Cole,
> 
> Until now, for x86, scsi controller is based of PCI bus.
> But for power, it provides another kind of bus, which is spapr-vio.
> scsi controller can use spapr-vio bus.
> 
> libvirt xml is just like this:
> 
> <disk type='file' device='disk' >
>      <driver name='qemu' type='raw'/>
>      <source file='/mnt-old/root/rhel6/RHEL6_install.img'/>
>      <target dev='hdd' bus='scsi' />
> </disk>
> <controller type='scsi' index='0'>
>      <address type='spapr-vio'/>
> </controller>
> 
> I think in virt-manager and virtinst, spapr-vio address type
> should be added.
> 
> For GUI, I am considering to add another combo to select
> the address type on disk page.
> 
> This option should be dependent on pseries machine type.
> Only pseries machine type is selected, it will be enabled.
> 

That sounds fine.

Thanks,
Cole


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