On 22/10/20 19:13, Jim Mattson wrote: > We don't actually use KVM_GET_SUPPORTED_CPUID at all today. If it's > commonly being misinterpreted as you say, perhaps we should add a > KVM_GET_TRUE_SUPPORTED_CPUID ioctl. Or, perhaps we can just fix this > in the documentation? Yes, I think we should fix the documentation and document the best practices around MSRs and CPUID bits. Mostly documenting what QEMU does, perhaps without all the quirks it has to support old kernels that messed things up even more. Paolo
