On 22/02/19 02:30, Sean Christopherson wrote:
> if (kvm_advertise_kvm()) {
> if (<handle kvm msr>)
> return ...;
> } else if (kvm_advertise_hyperv()) {
> if (<handle hyperv msr>)
> return ...;
> } else if (kvm_advertise_xen()) {
> if (<handle xen msrs>)
> return ...;
> }
>
> <fall through to main switch statement>
>
> Obviously assumes KVM only advertises itself as one hypervisor, and so
> the ordering is arbitrary.
No, KVM can advertise as both KVM and Hyper-V. CPUID 0x40000000 is used
for Hyper-V, while 0x40000100 is used for KVM. The MSRs do not conflict.
Paolo
