On 09/18/2014 07:40 AM, KY Srinivasan wrote: >> >> The main questions are what MSR index to use and how to detect the >> presence of the MSR. I've played with two approaches: >> >> 1. Use CPUID to detect the presence of this feature. This is very easy for >> KVM to implement by using a KVM-specific CPUID feature. The problem is >> that this will necessarily be KVM-specific, as the guest must first probe for >> KVM and then probe for the KVM feature. I doubt that Hyper-V, for >> example, wants to claim to be KVM. If we could standardize a non- >> hypervisor-specific CPUID feature, then this problem would go away. > > We would prefer a CPUID feature bit to detect this feature. > I guess if we're introducing the concept of pan-OS MSRs we could also have pan-OS CPUID. The real issue is to get a single non-conflicting standard. -hpa _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
