On 16/08/18 11:16 AM, Kit Chow wrote: > I only have access to intel hosts for testing (and possibly an AMD > host currently collecting dust) and am not sure how to go about getting > the proper test coverage for other architectures. Well, I thought you were only changing the Intel IOMMU implementation... So testing on Intel hardware seems fine to me. > Any suggestions? Do you anticipate any issues with dma mapping the pci bar > address in ntb_async_tx_submit on non-x86 archs? Do you or know of folks > who have ntb test setups with non-x86 hosts who might be able to help? I expect other IOMMUs will need to be updated to properly support dma_map_resource but that will probably need to be done on a case by case basis as the need arises. Unfortunately it seems the work to add dma_map_resource() didn't really consider that the IOMMUs had to have proper support and probably should have errored out instead of just passing along the physical address if the IOMMU didn't have support. I don't know of anyone with an NTB setup on anything but x86 at the moment. Logan
