linux-kernel - Re: [PATCH] EFI: Only set regions uncacheable if they support it

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Message-ID: <4F61FA14.6020203@zytor.com>
Date:	Thu, 15 Mar 2012 07:17:56 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	linux-kernel@...r.kernel.org, x86@...nel.org,
	matt.fleming@...el.com
Subject: Re: [PATCH] EFI: Only set regions uncacheable if they support it

On 03/15/2012 07:07 AM, Matthew Garrett wrote:
> 
> I have a report of a system that fails to boot with an MCE during EFI 
> setup. The memory range is marked reserved and claims not to support any 
> caching type, which I think probably translates as "Don't do anything to 
> this region ever".
> 

In other words, "don't map me"... not something we really support at the
moment, but perhaps we should; at least until we find systems in the
field that break with that constraint :(

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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