From patchwork Sun Aug 16 09:30:02 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 41680 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n7G9Y7Vm007890 for ; Sun, 16 Aug 2009 09:34:07 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754174AbZHPJaa (ORCPT ); Sun, 16 Aug 2009 05:30:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754111AbZHPJa2 (ORCPT ); Sun, 16 Aug 2009 05:30:28 -0400 Received: from mx2.redhat.com ([66.187.237.31]:45378 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754112AbZHPJaP (ORCPT ); Sun, 16 Aug 2009 05:30:15 -0400 Received: from int-mx2.corp.redhat.com (int-mx2.corp.redhat.com [172.16.27.26]) by mx2.redhat.com (8.13.8/8.13.8) with ESMTP id n7G9UGOC032105; Sun, 16 Aug 2009 05:30:16 -0400 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n7G9UFbd023540; Sun, 16 Aug 2009 05:30:15 -0400 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id n7G9UAjR005080; Sun, 16 Aug 2009 05:30:14 -0400 Received: from localhost.localdomain (cleopatra.tlv.redhat.com [10.35.255.11]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id E72B3250AFC; Sun, 16 Aug 2009 12:30:10 +0300 (IDT) From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 42/48] KVM: MMU: Fix is_dirty_pte() Date: Sun, 16 Aug 2009 12:30:02 +0300 Message-Id: <1250415008-17175-43-git-send-email-avi@redhat.com> In-Reply-To: <1250415008-17175-1-git-send-email-avi@redhat.com> References: <1250415008-17175-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.58 on 172.16.27.26 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org is_dirty_pte() is used on guest ptes, not shadow ptes, so it needs to avoid shadow_dirty_mask and use PT_DIRTY_MASK instead. Misdetecting dirty pages could lead to unnecessarily setting the dirty bit under EPT. Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 8ee67e3..8f2cb29 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -242,7 +242,7 @@ static int is_writeble_pte(unsigned long pte) static int is_dirty_pte(unsigned long pte) { - return pte & shadow_dirty_mask; + return pte & PT_DIRTY_MASK; } static int is_rmap_pte(u64 pte)