From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757895AbYCSTmG (ORCPT ); Wed, 19 Mar 2008 15:42:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755284AbYCSTaz (ORCPT ); Wed, 19 Mar 2008 15:30:55 -0400 Received: from mga03.intel.com ([143.182.124.21]:25828 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755269AbYCSTaw (ORCPT ); Wed, 19 Mar 2008 15:30:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.25,520,1199692800"; d="scan'208";a="220204536" Message-Id: <20080319000012.439150000@intel.com> User-Agent: quilt/0.46-1 Date: Tue, 18 Mar 2008 17:00:12 -0700 From: venkatesh.pallipadi@intel.com To: ak@muc.de, ebiederm@xmission.com, rdreier@cisco.com, torvalds@linux-foundation.org, gregkh@suse.de, airlied@skynet.ie, davej@redhat.com, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, akpm@linux-foundation.org, arjan@infradead.org, jesse.barnes@intel.com Cc: linux-kernel@vger.kernel.org Subject: [patch 00/13] x86: PAT support updated - v3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Follow up on earlier PAT patch series here: http://lkml.org/lkml/2008/1/10/312 This patch series adds Page Attribute Table (PAT) support on x86. There have been few changes based on comments for earlier patches and also issues that was seen while the earlier patchset was in mm. The main changes include: * Unlike earlier patchset, there are no changes to identity mapping of reserved regions. * Unlike earlier patches, there are no chanegs to early ioremap. * We look at MTRR setting and PAT request and track the resultant type to avoid aliasing. * UC_MINUS in PAT to provide backward compatibility to /dem/mem mmap users. In general, we have tried to make patches more simpler and cleaner. Hope is to cause less disruption along the way. The changes/cleaups that went into x86/mm (specifically pageattr.c) has helped us along the way. The patchset is against x86 testing from couple of days back. The last patch in the series is meant for test-tree only and adds some useful printks that can help us debug any potential issues. There are two issues that we are leaving out at the moment to make the patch simple. We will be addressing them with incremental patches soon: * FB/DRM drivers using pgprot_val and changing protection on their own without using any proper APIs like ioremap. There are few such usages and each one will be addressed separately. * To change attributes from WC to WB in a "perfect way", one has to follow certain sequence like make page non-present etc. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Suresh Siddha --