On 19/11/2015 16:32, Stefano Stabellini wrote: > > In addition to Kevin's replies, I have a high-level question: can VFIO > > be used by QEMU for both KVM and Xen? > > No. VFIO cannot be used with Xen today. When running on Xen, the IOMMU > is owned by Xen.
I don't think QEMU command line compatibility between KVM and Xen should be a design goal for GVT-g. Nevertheless, it shouldn't be a problem to use a "virtual" VFIO (which doesn't need the IOMMU, because it uses the MMU in the physical GPU) even under Xen. Paolo
