linux-kernel - Re: [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode

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Message-ID: <20141125190849.GF4128@pd.tnic>
Date:	Tue, 25 Nov 2014 20:08:49 +0100
From:	Borislav Petkov <bp@...e.de>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Richard Hendershot <rshendershot@...si.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>
Subject: Re: [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode_ldr
 on 32-bit

On Tue, Nov 25, 2014 at 01:55:29PM -0500, Boris Ostrovsky wrote:
> On 11/25/2014 01:43 PM, Borislav Petkov wrote:
> >On Tue, Nov 25, 2014 at 01:43:26PM -0500, Boris Ostrovsky wrote:
> >>I don't think this routine is called on PV.
> >They're either both called or none is. At least on baremetal, that is.
> >
> 
> PV guests don't start with startup_32.
> 
> We are coming from a resume into load_ucode_ap as:

Btw, why is this thing even running on xen? I'd like to make
CONFIG_MICROCODE depend on !PARAVIRT and be done with it.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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