Hi, > To seamlessly enable buffer sharing with drivers using such frameworks, > make the virtio-gpu driver expose the resource handle as the DMA address > of the buffer returned from the DMA-buf mapping operation. Arguably, the > resource handle is a kind of DMA address already, as it is the buffer > identifier that the device needs to access the backing memory, which is > exactly the same role a DMA address provides for native devices. No. A scatter list has guest dma addresses, period. Stuffing something else into a scatterlist is asking for trouble, things will go seriously wrong when someone tries to use such a fake scatterlist as real scatterlist. Also note that "the DMA address of the buffer" is bonkers in virtio-gpu context. virtio-gpu resources are not required to be physically contigous in memory, so typically you actually need a scatter list to describe them. cheers, Gerd _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
