linux-kernel - Re: [PATCH 00/11] x86/microcode: Early load microcode

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Message-ID: <20121002043954.GA27331@liondog.tnic>
Date:	Tue, 2 Oct 2012 06:39:54 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Jamie Gloudon <jamie.gloudon@...il.com>
Cc:	fenghua.yu@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/11] x86/microcode: Early load microcode

On Mon, Oct 01, 2012 at 07:37:04PM -0400, Jamie Gloudon wrote:
> On Mon, Oct 01, 2012 at 06:27:45PM +0200, Borislav Petkov wrote:
> > On Mon, Oct 01, 2012 at 12:11:51PM -0400, Jamie Gloudon wrote:
> > > Hey,
> > > 
> > >   Any chance of this getting merge for the 3.7 cycle? 
> > 
> > It is not ready yet: http://marc.info/?l=linux-kernel&m=134910582107898
> > 
> > Out of curiosity: why do you nee it?
> > 
> Seems like a better alternative to microcode_ctl which some distros don't
> contain.

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Well,

if you want to reload your microcode, you shouldn't be needing
microcode_ctl (I believe this should be the case too on Intel, from
staring at the code - on AMD it works).

Basically, you simply put the microcode binaries into
/lib/firmware/{amd,intel}-ucode/ and then do as root:

$ echo 1 > /sys/devices/system/cpu/microcode/reload

That's it, no need for special tools.

-- 
Regards/Gruss,
    Boris.
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