On Mon, 2017-10-23 at 11:46 +0300, Marcel Apfelbaum wrote: > On 23/10/2017 8:45, Gerd Hoffmann wrote: > > Hi, > > > > > The guest will still run with 40 bits physical! > > > (judging the code anyway, I hope I am wrong) > > > > > > Then, the stakes are not so big, the Guest kernel will disregard > > > the 64bit hole since is not CPU addressable and go on. > > > > But then there is no working 64bit hole for hotplug ... > > > > Hosts with old CPUs are not fit for modern PCIe devices > having large BARs anyway, no 64bit hole in this case would > be OK, I think.
Well, my workstation which has only 39 bits physical is kaby lake. If you classify this as "old cpu", what is a new cpu then? cheers, Gerd
