Re: [Xen-devel] pvops microcode support for AMD FAM >= 15
On Thu, Dec 06, 2012 at 08:34:31AM +0000, Ian Campbell wrote:
> (trim quote please...)
> On Wed, 2012-12-05 at 21:47 +0000, Konrad Rzeszutek Wilk wrote:
> > Do you want to prep a patch that I can stick in my 'microcode' branch?
> > .. That I will at some point try to upstream.
>
> You might want to look back at the archives when Jeremy first tried to
> upstream this work, it was a vehement "No" and the resulting thread was
> not pretty.
>
> Now that we have early loading via the hypervisor in 4.2 and Linux is
> finally in the process of growing its own early microcode loading
> solution I suspect the No would be even firmer.
>
> It is on xenbits if you want it anyway:
>
> git://xenbits.xen.org/people/ianc/linux-2.6.git debian/wheezy/microcode
Thx. Pulled it in my stable/misc branch.
>
> About the only argument I can see for continuing to try upstreaming this
> stuff is that in
> http://www.gossamer-threads.com/lists/linux/kernel/1583630 Fenghua says:
>
> Note, however, that Linux users have gotten used to being able
> to install a microcode patch in the field without having a
> reboot; we support that model too.
>
> i.e. this is an argument for keeping the previous scheme in parallel,
> which I suppose is an argument for supporting the same under Xen (I
> don't know if its a good one though.
>
> Ian.
>
> --
> Ian Campbell
>
>
> All the existing 2.0.x kernels are to buggy for 2.1.x to be the
> main goal.
> -- Alan Cox
>
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