On Wed, Feb 10, 2021 at 5:29 AM Borislav Petkov <b...@alien8.de> wrote: > > On Tue, Feb 09, 2021 at 10:06:02PM -0800, Andy Lutomirski wrote: > > On Tue, Feb 9, 2021 at 6:33 PM Andy Lutomirski <l...@kernel.org> wrote: > > > > > > Erratum #93 applies to the first generation of AMD K8 CPUs. Skip the > > > workaround on newer CPUs. > > > > Whoops, this breaks the !CPU_SUP_AMD build. It needs a fixup like this: > > > > https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?h=x86/fault&id=06772a3b6918bf6d6d0778946149b7d56ae30d80 > > > > Boris, do you want a v3? > > Do we even want to apply patch 8 at all? This has always ran on K8 NPT > CPUs too and those are pretty much obsolete by now so I'm thinking, > leave sleeping dogs lie...?
I think we do want this patch. Without it, there's a fairly sizeable range of bogus RIP values that will result in applying the fixup instead of properly oopsing, even on new CPUs.
