On Tue, May 16, 2023 at 01:57:22PM +0000, Shameerali Kolothum Thodi wrote: > > What happens on your platform if a guest tries to do P2P? Does the > > platform crash? > > I am not sure. Since the devices are behind SMMU, I was under the assumption > that we do have the guarantee of isolation here(grouping).
That is not the case. The SMMU will contain an IOPTE with the the CPU address of the P2P memory and when the SMMU executes that operation the system does .. ?? Hopefully it responds back with error and keeps going, or it crashes.. Jason
