From: "H. Peter Anvin" <hpa@zytor.com>
To: Matthew Garrett <mjg@redhat.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 07:47:57 -0700 [thread overview]
Message-ID: <4F62011D.4000708@zytor.com> (raw)
In-Reply-To: <20120315144236.GB4650@srcf.ucam.org>
On 03/15/2012 07:42 AM, Matthew Garrett wrote:
> On Thu, Mar 15, 2012 at 07:36:46AM -0700, H. Peter Anvin wrote:
>
>> I would still really like to understand why we're seeing #MCs... that's
>> bothersome all by itself.
>
> The region is the legacy video RAM, so I can imagine there being
> something magic about it.
>
WTF?! That should be UC at all times... it isn't even WC-capable.
Furthermore, we may need this region (assuming there is actually a video
card there.)
What do the fixed MTRRs look like?
-hpa
next prev parent reply other threads:[~2012-03-15 14:48 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
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 [this message]
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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