On 07/23/2012 04:50 PM, Peter Maydell wrote: >> >> Yet. > > There is no mechanism in the virtualization extensions to either > trap on or present a false value for guest accesses to the CPSR > mode bits. So you can't make the guest OS think it is in Hypervisor > mode. Therefore you can't provide the guest with the virtualization > extensions. (The same argument applies for Monitor mode and means > you can't provide the Security extensions (TrustZone) to the guest > either.) I guess you could handle all code in the guest hypervisor > under TCG but implementing a hybrid TCG+KVM mode would be a lot > of effort and probably not really perform very well anyway... Gaah, people add virtualization extensions to fix an ISA's non-virtualizability, then do the same mistake again. But I was only joking. Nested virtualization is interesting technically but so far I haven't seen any huge or even small uptake. -- error compiling committee.c: too many arguments to function -- 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
