On Fri, Aug 28, 2020 at 10:55:29AM +0200, Jan Beulich wrote: > On 20.08.2020 17:08, Roger Pau Monne wrote: > > Now that the main PV/HVM MSR handlers raise #GP for all unknown MSRs, there > > is > > no need to special case these MSRs any more. > > I agree, yet I'd like to point out (based on past backporting of > security fixes) that this change may end up being a good source > of backporting mistakes, as 4.14 may need chunks added here which > on master / staging have no place anymore.
Even if we leave this chunk out, patches for > 4.14 won't need to add anything to make a MSR return a #GP, so it's likely that the chunk will have to be added for backports anyway. I really have no idea of how to help with backporting with such change in place. Thanks, Roger.
