[libvirt] [PATCH 09/18] Add virtio-related options to interfaces

Daniel P. Berrange berrange at redhat.com
Tue May 30 13:09:59 UTC 2017

On Tue, May 30, 2017 at 02:50:32PM +0200, Ján Tomko wrote:
> <interface type='user'>
>   <mac address='52:54:56:5a:5c:5e'/>
>   <model type='virtio'/>
>   <driver iommu_platform='on' ats='on'/>
> </interface>

Feels like we could just use  'iommu=on' as the name.

Also, I'm unclear whether we actually need the 'ats' attribute.

>From the description it sounds like if we have device_iotlb=on
for the IOMMU device, then we should have ats=on too. Is there
a  reason to use ats=off when device_iotlb=on, or vica-verca.
If not, then we should just do the right thing and set ats=on
whenever we see device_iotlb=on.

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