From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2993155AbWJUQwX (ORCPT ); Sat, 21 Oct 2006 12:52:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2993137AbWJUQwD (ORCPT ); Sat, 21 Oct 2006 12:52:03 -0400 Received: from ns.suse.de ([195.135.220.2]:45212 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S2993142AbWJUQvb (ORCPT ); Sat, 21 Oct 2006 12:51:31 -0400 From: Andi Kleen References: <20061021 651.356252000@suse.de> In-Reply-To: <20061021 651.356252000@suse.de> To: "bibo,mao" , patches@x86-64.org, linux-kernel@vger.kernel.org Subject: [PATCH] [10/19] x86_64: x86_64 add NX mask for PTE entry Message-Id: <20061021165130.40E2213C4D@wotan.suse.de> Date: Sat, 21 Oct 2006 18:51:30 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: "bibo,mao" If function change_page_attr_addr calls revert_page to revert to original pte value, mk_pte_phys does not mask NX bit. If NX bit is set on no NX hardware supported x86_64 machine, there is will be RSVD type page fault and system will crash. This patch adds NX mask bit for PTE entry. Signed-off-by: bibo,mao Signed-off-by: Andi Kleen --- include/asm-x86_64/pgtable.h | 1 + 1 files changed, 1 insertion(+) Index: linux/include/asm-x86_64/pgtable.h =================================================================== --- linux.orig/include/asm-x86_64/pgtable.h +++ linux/include/asm-x86_64/pgtable.h @@ -366,6 +366,7 @@ static inline pte_t mk_pte_phys(unsigned { pte_t pte; pte_val(pte) = physpage | pgprot_val(pgprot); + pte_val(pte) &= __supported_pte_mask; return pte; }