linux-kernel - Re: [PATCH] x86/Sandy Bridge: reserve pages when integrated graphics is present

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Message-ID: <20121115081322.74004a52@jbarnes-desktop>
Date:	Thu, 15 Nov 2012 08:13:22 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/Sandy Bridge: reserve pages when integrated
 graphics is present

On Thu, 15 Nov 2012 10:47:11 -0200
Henrique de Moraes Holschuh <hmh@....eng.br> wrote:

> On Wed, 14 Nov 2012, Jesse Barnes wrote:
> > +		unsigned long bad_ranges[] = {
> > +			0x20050000,
> > +			0x20110000,
> > +			0x20130000,
> > +			0x20138000,
> > +			0x40004000,
> 
> Yikes.  Can this be fixed through a microcode update?  The kernel would
> still need the workaround anyway, but at least you would be able to be quite
> heavy-handed on it, and users could be warned of a better fix...

No, this affects the logic on the GPU side, so there's no microcode way
to fix it.

-- 
Jesse Barnes, Intel Open Source Technology Center
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