Re: [PATCH] vhost: introduce mdev based hardware backend

[Jason Wang]

On 2019/9/27 äå12:54, Tiwei Bie wrote:
> > > +
> > > +		/*
> > > +		 * In vhost-mdev, userspace should pass ring addresses
> > > +		 * in guest physical addresses when IOMMU is disabled or
> > > +		 * IOVAs when IOMMU is enabled.
> > > +		 */
> > A question here, consider we're using noiommu mode. If guest physical
> > address is passed here, how can a device use that?
> >
> > I believe you meant "host physical address" here? And it also have the
> > implication that the HPA should be continuous (e.g using hugetlbfs).
> The comment is talking about the virtual IOMMU (i.e. iotlb in vhost).
> It should be rephrased to cover the noiommu case as well. Thanks for
> spotting this.


So the question still, if GPA is passed how can it be used by the 
virtio-mdev device?

Thanks