Messages in this thread | | | Date | Fri, 19 Sep 2014 08:37:08 -0500 | From | Chuck Ebbert <> | Subject | Re: x86, microcode: BUG: microcode update that changes x86_capability |
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On Fri, 19 Sep 2014 09:14:50 -0400 Josh Boyer <jwboyer@fedoraproject.org> wrote:
> On Fri, Sep 19, 2014 at 8:54 AM, Chuck Ebbert <cebbert.lkml@gmail.com> wrote: > > On Fri, 19 Sep 2014 13:29:53 +0200 > > Borislav Petkov <bp@alien8.de> wrote: > > > >> On Fri, Sep 19, 2014 at 08:00:15AM -0300, Henrique de Moraes Holschuh wrote: > >> > We're also killing microcode update support outside of the initramfs in > >> > Debian. It has become obvious that anything other than the early initramfs > >> > method of microcode updates should be considered a developer thing. > >> > >> That's simply not true: long-running systems which you can't reboot for > >> whatever reason will need the late microcode update. > >> > > > > Assuming we can identify all the affected models and steppings, maybe > > something like this would work: > > > > 1) Refuse to finish booting if a microcode update that disables TSX > > isn't applied before userspace starts running on those CPUs. > > How would you accomplish that when applying a microcode update > requires userspace? Or did you mean "before we transition out of the > initramfs"? >
I guess I meant requiring the update be done with the early microcode method.
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