..snip.. >> > > This raises two issues: >> > > 1) swiotlb_tlb_unmap_single fails to check whether the index >generated >> > > from the dma_addr is in range of the io_tlb_orig_addr array. >> > That is fairly simple to implement I would think. That is it can >check >> > that the dma_addr is from the PA in the io_tlb pool when >SWIOTLB=force >> > is used. >> >> >> I'm not sure this can fix all the cases. It looks to me we should map >> descriptor coherent but readonly (which is not supported by current >DMA >> API). > >Neither is this supported but encrypted memory technologies. -ECONFUSED. Could you state this once more please? I am not exactly sure what you are saying > >> Otherwise, device can modify the desc[i].addr/desc[i].len at any time >to >> pretend a valid mapping. >> >> Thanks >> >> >> > _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
