From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759216AbXLWPBe (ORCPT ); Sun, 23 Dec 2007 10:01:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754156AbXLWOwM (ORCPT ); Sun, 23 Dec 2007 09:52:12 -0500 Received: from il.qumranet.com ([82.166.9.18]:35917 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753645AbXLWOvp (ORCPT ); Sun, 23 Dec 2007 09:51:45 -0500 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net Subject: [PATCH 36/50] KVM: MMU: When updating the dirty bit, inform the mmu about it Date: Sun, 23 Dec 2007 16:51:21 +0200 Message-Id: <1198421495-31481-37-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1198421495-31481-1-git-send-email-avi@qumranet.com> References: <1198421495-31481-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since the mmu uses different shadow pages for dirty large pages and clean large pages, this allows the mmu to drop ptes that are now invalid. Signed-off-by: Avi Kivity --- drivers/kvm/paging_tmpl.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h index a0f84a5..a9e687b 100644 --- a/drivers/kvm/paging_tmpl.h +++ b/drivers/kvm/paging_tmpl.h @@ -74,9 +74,14 @@ static void FNAME(update_dirty_bit)(struct kvm_vcpu *vcpu, pt_element_t *ptep, gfn_t table_gfn) { + gpa_t pte_gpa; + if (write_fault && !is_dirty_pte(*ptep)) { mark_page_dirty(vcpu->kvm, table_gfn); *ptep |= PT_DIRTY_MASK; + pte_gpa = ((gpa_t)table_gfn << PAGE_SHIFT); + pte_gpa += offset_in_page(ptep); + kvm_mmu_pte_write(vcpu, pte_gpa, (u8 *)ptep, sizeof(*ptep)); } } -- 1.5.3.7