From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753083AbYCSTn2 (ORCPT ); Wed, 19 Mar 2008 15:43:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755321AbYCSTbA (ORCPT ); Wed, 19 Mar 2008 15:31:00 -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 S1755276AbYCSTax (ORCPT ); Wed, 19 Mar 2008 15:30:53 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.25,520,1199692800"; d="scan'208";a="220204542" Message-Id: <20080319000100.552111000@intel.com> References: <20080319000012.439150000@intel.com> User-Agent: quilt/0.46-1 Date: Tue, 18 Mar 2008 17:00:23 -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, Venkatesh Pallipadi , Suresh Siddha Subject: [patch 11/13] x86: PAT Add set_memory_wc() interface Content-Disposition: inline; filename=set_memory_wc.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a set_memory_wc interface(), similar to set_memory_uc interface. Callers has to call set_memory_uc, set_memory_wb and set_memory_wc, set_memory_wb as pairs. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Suresh Siddha Index: linux-2.6-x86.git/arch/x86/mm/pageattr.c =================================================================== --- linux-2.6-x86.git.orig/arch/x86/mm/pageattr.c 2008-03-18 03:23:49.000000000 -0700 +++ linux-2.6-x86.git/arch/x86/mm/pageattr.c 2008-03-18 03:53:45.000000000 -0700 @@ -788,6 +788,25 @@ } EXPORT_SYMBOL(set_memory_uc); +int _set_memory_wc(unsigned long addr, int numpages) +{ + return change_page_attr_set(addr, numpages, + __pgprot(_PAGE_CACHE_WC)); +} + +int set_memory_wc(unsigned long addr, int numpages) +{ + if (!pat_wc_enabled) + return set_memory_uc(addr, numpages); + + if (reserve_memtype(addr, addr + numpages * PAGE_SIZE, + _PAGE_CACHE_WC, NULL)) + return -EINVAL; + + return _set_memory_wc(addr, numpages); +} +EXPORT_SYMBOL(set_memory_wc); + int _set_memory_wb(unsigned long addr, int numpages) { return change_page_attr_clear(addr, numpages, Index: linux-2.6-x86.git/include/asm-x86/cacheflush.h =================================================================== --- linux-2.6-x86.git.orig/include/asm-x86/cacheflush.h 2008-03-18 03:21:25.000000000 -0700 +++ linux-2.6-x86.git/include/asm-x86/cacheflush.h 2008-03-18 03:53:45.000000000 -0700 @@ -35,8 +35,10 @@ int set_pages_rw(struct page *page, int numpages); int _set_memory_uc(unsigned long addr, int numpages); +int _set_memory_wc(unsigned long addr, int numpages); int _set_memory_wb(unsigned long addr, int numpages); int set_memory_uc(unsigned long addr, int numpages); +int set_memory_wc(unsigned long addr, int numpages); int set_memory_wb(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); --