On Thu, Nov 09, 2023 at 12:10:59AM +0000, Zhang, Tina wrote: > > If this is going to happen can we also convert vt-d to actually use the io > > page > > table stuff directly and shuffle the code around so it is structured like > > the rest of > > the io page table implementations?
> Converting VT-d driver to use io page table involves much code > change. I made a local version of it, and it didn't prove much > benefit. Well, it structures the code in a similar way to all the other drivers, though I admit to having not looked closely at the io page table stuff. > VT-d only supports one 1st-stage IO pgtable format and one 2nd-stage > IO pgtable format. So, the current IO pgtable handling operations > seems more efficient comparing to adding another layer callbacks in > them. I would like to de-virtualize those callbacks, is is completely pointless when we have per-format iommu_domain ops now. Jason
