On Thu, Sep 18, 2014 at 12:07 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: > Might Intel be willing to extend that range to 0x40000000 - > 0x400fffff? And would Microsoft be okay with using this mechanism for > discovery? So, for CPUID, the SDM (Table 3-17. Information Returned by CPUID) says today: "No existing or future CPU will return processor identification or feature information if the initial EAX value is in the range 40000000H to 4FFFFFFFH." We can define a cross-VM CPUID range from there. The CPUID can return the index of the MSR if needed. -- Jun Intel Open Source Technology Center _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization