On Thu, Jun 13, 2024 at 12:01 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote: > > Rewrite the comment above VMCS12_REVISION to unequivocally state that the > ID must never change. KVM_{G,S}ET_NESTED_STATE have been officially > supported for some time now, i.e. changing VMCS12_REVISION would break > userspace. > > Opportunistically add a blurb to the CHECK_OFFSET() comment to make it > explicitly clear that new fields are allowed, i.e. that the restriction > on the layout is all about backwards compatibility. > > No functional change intended. > > Cc: Jim Mattson <jmattson@xxxxxxxxxx> > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>