On 09/03/2015 18:08, Avi Kivity wrote: > Is the issue emulating a higher MAXPHYADDR on the guest than is > available on the host? I don't think there's any need to support that. No, indeed. The only problem is that the failure mode is quite horrible (you get a triple fault, possibly while the guest is running). If you need that, disable EPT. :) > Emulating a lower setting on the guest than is available on the host is, > I think, desirable. Whether it would work depends on the relative > priority of EPT misconfiguration exits vs. page table permission faults. Yes, that's doable. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html