On Mon, Jul 25, 2022 at 07:38:52AM +0000, Tian, Kevin wrote: > > Yes. qemu has to select a static aperture at start. > > > > The entire aperture is best, if that fails > > > > A smaller aperture and hope the guest doesn't use the whole space, if > > that fails, > > > > The entire guest physical map and hope the guest is in PT mode > > That sounds a bit hacky... does it instead suggest that an interface > for reporting the supported ranges on a tracker could be helpful once > trying the entire aperture fails? It is the "try and fail" approach. It gives the driver the most flexability in processing the ranges to try and make them work. If we attempt to describe all the device constraints that might exist we will be here forever. Eg the driver might be able to do the entire aperture, but it has to use 2M pages or something. Jason
