On 21/03/2023 7:28 am, Jan Beulich wrote: > On 20.03.2023 20:07, Andrew Cooper wrote: >> On 20/03/2023 4:32 pm, Ковалёв Сергей wrote: >>> gva_to_gfn command used for fast address translation in LibVMI project. >>> With such a command it is possible to perform address translation in >>> single call instead of series of queries to get every page table. >>> >>> Thanks to Dmitry Isaykin for involvement. >>> >>> Signed-off-by: Sergey Kovalev <[email protected]> >> I fully appreciate why you want this hypercall, and I've said several >> times that libvmi wants something better than it has, but... > But is a domctl really the right vehicle? While not strictly intended for > device models, a dm-op would seem more suitable to me. Considering you > already brought altp2m into play, it could also be a sub-op of HVMOP_altp2m.
It definitely feels wrong to be using an altp2m op if you're not using altp2m, and there introspection usecases that don't use altp2m. dm-op would be the place to put this, if I wasn't pretty sure it would be modified over time. As I say - I can see why this might be useful, but pagewalking is more complicated than the interface presented here. ~Andrew
