On Fri, 21 Feb 2020 11:41:57 +0800 Jason Wang <jasowang@xxxxxxxxxx> wrote: > > I *think* what you are suggesting here is that virtio devices that > > have !F_IOMMU_PLATFORM should have their dma_ops set up so that the > > DMA API treats IOVA==PA, which will satisfy what the device expects. > > > Can this work for swiotlb? It works on s390. I guess it would be the responsibility of however provides the dma ops for the virtio device to ensure that if !F_IOMMU_PLATFORM the addresses are GPA like *mandated* by the VIRTIO specification. Regards, Halil
