From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, matt.fleming@intel.com
Subject: Re: [PATCH] EFI: Only set regions uncacheable if they support it
Date: Thu, 15 Mar 2012 14:24:46 +0000 [thread overview]
Message-ID: <20120315142445.GA4357@srcf.ucam.org> (raw)
In-Reply-To: <4F61FA14.6020203@zytor.com>
On Thu, Mar 15, 2012 at 07:17:56AM -0700, H. Peter Anvin wrote:
> 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 :(
Mapping should be harmless as long as we then don't touch it? I can't
think of any circumstances where we would.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2012-03-15 14:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-15 13:56 Matthew Garrett
2012-03-15 14:00 ` H. Peter Anvin
2012-03-15 14:07 ` Matthew Garrett
2012-03-15 14:17 ` H. Peter Anvin
2012-03-15 14:24 ` Matthew Garrett [this message]
2012-03-15 14:28 ` H. Peter Anvin
2012-03-15 14:33 ` Matthew Garrett
2012-03-15 14:36 ` H. Peter Anvin
2012-03-15 14:42 ` Matthew Garrett
2012-03-15 14:47 ` H. Peter Anvin
2012-03-15 14:54 ` Matthew Garrett
2012-03-15 14:51 ` Alan Cox
2012-03-15 14:54 ` Alan Cox
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