On Fri, Jul 29, 2022, Paolo Bonzini wrote: > On 7/22/22 00:56, Sean Christopherson wrote: > > Except the errata are based on FMS and the FMS exposed to the L1 hypervisor may > > not be the real FMS. > > > > But that's moot, because they_should_ be fully emulated by KVM anyways; KVM > > runs L2 with a MSR value modified by perf, not the raw MSR value requested by L1. > > > > Of course KVM screws things up and fails to clear the flag in entry controls... > > All exit controls are emulated so at least KVM gets those right. > > Can you send this as a separate patch? Will do.
