From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH] ACPI: use ioremap_cache()
Date: Tue, 28 Dec 2010 12:12:15 -0800
Message-ID: <4D1A449F.50002@zytor.com>
References: <20101214220932.GA1206@sgi.com>	 <alpine.LFD.2.00.1012141903210.25387@x980> <20101215024136.GB19601@sgi.com>	 <alpine.LFD.2.00.1012142302110.4878@x980> <20101215164635.GA27373@sgi.com>	 <alpine.LFD.2.00.1012151536510.21167@x980>	 <alpine.LFD.2.00.1012162149370.20940@x980>	 <alpine.LFD.2.00.1012170307080.20940@x980>	 <1293506460.10593.43.camel@sli10-conroe>  <4D195AFF.9020106@zytor.com> <1293512540.10593.46.camel@sli10-conroe>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Return-path: <linux-acpi-owner@vger.kernel.org>
Received: from terminus.zytor.com ([198.137.202.10]:56619 "EHLO mail.zytor.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1750837Ab0L1UM0 (ORCPT <rfc822;linux-acpi@vger.kernel.org>);
	Tue, 28 Dec 2010 15:12:26 -0500
In-Reply-To: <1293512540.10593.46.camel@sli10-conroe>
Sender: linux-acpi-owner@vger.kernel.org
List-Id: linux-acpi@vger.kernel.org
To: Shaohua Li <shaohua.li@intel.com>
Cc: Len Brown <lenb@kernel.org>, Jack Steiner <steiner@sgi.com>, Henrique de Moraes Holschuh <hmh@hmh.eng.br>, "tony.luck@gmail.com" <tony.luck@gmail.com>, "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "gbeshers@sgi.com" <gbeshers@sgi.com>

On 12/27/2010 09:02 PM, Shaohua Li wrote:
>>
>> For x86, that is handled by the MTRRs; 
> does it cause any problem if the pat and mtrr doesn't match?
> 

No, the interaction rules between PAT and MTRR are well-defined; see the
SDM 3A.  If they weren't we would have huge problems with SMM.

	-hpa

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