From patchwork Tue Feb 16 10:35:24 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 79607 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o1GAeo05019271 for ; Tue, 16 Feb 2010 10:40:50 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932928Ab0BPKix (ORCPT ); Tue, 16 Feb 2010 05:38:53 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51905 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932817Ab0BPKfl (ORCPT ); Tue, 16 Feb 2010 05:35:41 -0500 Received: from int-mx04.intmail.prod.int.phx2.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.17]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o1GAZedc002902 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 16 Feb 2010 05:35:40 -0500 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by int-mx04.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o1GAZcha009460; Tue, 16 Feb 2010 05:35:39 -0500 Received: from localhost.localdomain (file.tlv.redhat.com [10.35.255.8]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 10ADA250AEA; Tue, 16 Feb 2010 12:35:37 +0200 (IST) From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 26/38] KVM: mark segments accessed on HW task switch Date: Tue, 16 Feb 2010 12:35:24 +0200 Message-Id: <1266316536-28936-27-git-send-email-avi@redhat.com> In-Reply-To: <1266316536-28936-1-git-send-email-avi@redhat.com> References: <1266316536-28936-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.17 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 16 Feb 2010 10:40:51 +0000 (UTC) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 3b90298..d47ceda 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4697,18 +4697,6 @@ static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) return kvm_seg.selector; } -static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, - u16 selector, - struct kvm_segment *kvm_seg) -{ - struct desc_struct seg_desc; - - if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) - return 1; - seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); - return 0; -} - static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) { struct kvm_segment segvar = { @@ -4749,11 +4737,14 @@ int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int type_bits, int seg) { struct kvm_segment kvm_seg; + struct desc_struct seg_desc; if (is_vm86_segment(vcpu, seg) || !is_protmode(vcpu)) return kvm_load_realmode_segment(vcpu, selector, seg); - if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) + + if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) return 1; + seg_desct_to_kvm_desct(&seg_desc, selector, &kvm_seg); kvm_check_segment_descriptor(vcpu, seg, selector); kvm_seg.type |= type_bits; @@ -4764,6 +4755,11 @@ int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, kvm_seg.unusable = 1; kvm_set_segment(vcpu, &kvm_seg, seg); + if (selector && !kvm_seg.unusable && kvm_seg.s) { + /* mark segment as accessed */ + seg_desc.type |= 1; + save_guest_segment_descriptor(vcpu, selector, &seg_desc); + } return 0; }