On Tue, May 04, 2021, Paolo Bonzini wrote: > On 04/05/21 19:09, Sean Christopherson wrote: > > On Sat, May 01, 2021, Paolo Bonzini wrote: > > > - make it completely independent from migration, i.e. it's just a facet of > > > MSR_KVM_PAGE_ENC_STATUS saying whether the bitmap is up-to-date. It would > > > use CPUID bit as the encryption status bitmap and have no code at all in KVM > > > (userspace needs to set up the filter and implement everything). > > > > If the bit is purely a "page encryption status is up-to-date", what about > > overloading KVM_HC_PAGE_ENC_STATUS to handle that status update as well? That > > would eliminate my biggest complaint about having what is effectively a single > > paravirt feature split into two separate, but intertwined chunks of ABI. > > It's true that they are intertwined, but I dislike not having a way to read > the current state. >From the guest?
