> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Tuesday, September 4, 2018 4:33 PM > > > > bus address is commonly used along with physical/virtual address, to > > represent different views between devices and CPU. From that angle > > I think BFN is a clear term in this context. btw it is not necessary to > > differentiate GBFN and MBFN since there is only one BFN view per > > device. > > Sure, but you neglect the presence of one or more IOMMUs when > you say "between devices and CPU". There addresses prior to and > after IOMMU translation are distinct, and while the one before the > translation matches the device view, the one after translation does > not necessarily match the CPU view. Hence there are two "bus" > frame numbers here - one representing the device view, and the > other representing the IOMMU (output) view. >
I didn't get. the output address from IOMMU is the one sent to memory controller, same as the one sent from CPU. Thanks Kevin _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
