On Fri, Aug 03, 2018 at 10:58:36AM -0500, Benjamin Herrenschmidt wrote: > On Fri, 2018-08-03 at 00:05 -0700, Christoph Hellwig wrote: > > > 2- Make virtio use the DMA API with our custom platform-provided > > > swiotlb callbacks when needed, that is when not using IOMMU *and* > > > running on a secure VM in our case. > > > > And total NAK the customer platform-provided part of this. We need > > a flag passed in from the hypervisor that the device needs all bus > > specific dma api treatment, and then just use the normal plaform > > dma mapping setup. > > Christoph, as I have explained already, we do NOT have a way to provide > such a flag as neither the hypervisor nor qemu knows anything about > this when the VM is created. Well, if your setup is so fucked up I see no way to support it in Linux. Let's end the discussion right now then. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
