linux-kernel - Re: [PATCH 1/2] x86: Track minimum microcode revision globally v2

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Message-ID: <20120612221931.GA4376@liondog.tnic>
Date:	Wed, 13 Jun 2012 00:19:31 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>, x86@...nel.org, hpa@...or.com,
	eranian@...gle.com, linux-kernel@...r.kernel.org,
	a.p.zijlstra@...llo.nl
Subject: Re: [PATCH 1/2] x86: Track minimum microcode revision globally v2

On Tue, Jun 12, 2012 at 03:09:25PM -0700, Andi Kleen wrote:
> 
> >Ok, is it only me or is this boot_min_microcode superfluous?
> >IOW, you can only use boot_cpu_data.microcode instead and drop
> >boot_min_microcode.
> 
> boot_cpu_data.microcode contains a copy of the original microcode,
> so we couldn't detect the boot cpu case. In theory could hard code
> CPU #0 is boot cpu or so,
> but I prefer to track it with the separate variable.

Ok, this begs the next question then: why do we need to say that some AP
has a lower ucode version than the BSP?

-- 
Regards/Gruss,
    Boris.
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