[libvirt] [RFC] Add iommu group commands

[Li Zhang]

On 2013年09月17日 21:39, Daniel P. Berrange wrote:
> On Tue, Sep 17, 2013 at 03:56:46PM +0800, Li Zhang wrote:
>> Hi,
>>
>> Currently, we need to assign the iommu group to guests manually.
>> It needs to know the groups information.
>> I think we can add some iommu group commands to provide users
>> groups information.
>>
>> I can think of these commands as the following:
>>
>> #virsh group-list  <--active>
>>    * list all the groups in the system with VFIO
>>    * --active: list the active groups which have been used by guests.
>>
>> #virsh group-devs  <groupnum>
>>    * list the devices in the group.
>>    *If groupnum is not specified, it will list every groups' devices.
>>
>> # virsh group-dumpxml <groupnum>
>>    * dump the group's xml configuration.
>>      dumxml file for example:
>>      <iommuGroup number='1'>
>>        <address domain='0x0001' bus='0x40' slot='0x00' function='0x0'/>
>>        <address domain='0x0001' bus='0x40' slot='0x00' function='0x1'/>
>>      </iommuGroup>
>>
>> This information can also be got by #nodedev-dumpxml <device>
>> But users still can't know all the groups and the devices in the
>> group directly.
>>
>> Any suggestions?
> I'm not convinced we should add new APIs or commands for this.
>
> I think that an iommu group could just be presented as a new
> type of virtual device in the existing 'nodedev' APIs.

Ah, okay, it sounds better if it can be presented in the existing 
'nodedev' APIs.
I will have a look at it.

Thanks.

>
> Regards,
> Daniel