[MODERATED] Re: [PATCH v2 2/8] MDSv2 1

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Tue, Dec 11, 2018 at 11:03:35AM +0100, speck for Borislav Petkov wrote:
> On Mon, Dec 10, 2018 at 07:13:18PM -0500, speck for Kanth Ghatraju wrote:
> > If you have a patched kernel but old microcode and then do a late load
> > of the microcode,
> 
> And to extend what the others said: late microcode loading is a can
> of worms which we shouldnt've opened back then. Especially since it
> requires a complicated dance on the OS part to quiesce the cores to even
> work without locking up the core or whatever crazy can happen.

We (Oracle, UEK kernel) has this can of worms happily (well, we did have to
get rid of some bugs) working.

We can start that conversation upstream, but Thomas and Boris -are you
guys very much against this idea with the upstream kernel or would you
be up for taking a sip from this can?

Thanks!
> 
> So microcode update should be handled just like updating your kernel -
> you need to reboot the machine.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
> --