On 05.07.2021 11:25, Olaf Hering wrote: > Am Mon, 5 Jul 2021 11:19:59 +0200 > schrieb Jan Beulich <[email protected]>: > >> "The interface" being which one? The tool stack can map the guest's >> grant table, so it is in the position to find out about all grants >> without further hypervisor help. > > The interface means the code behind verify_frames. > > If there are indeed ways to query which pages belong to grants, how would the > toolstack need to do that?
Map the grant table of the guest and walk it, recording any MFN for which at least one valid r/w grant exists. Jan
