From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933228AbXDAOoH (ORCPT ); Sun, 1 Apr 2007 10:44:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933245AbXDAOmx (ORCPT ); Sun, 1 Apr 2007 10:42:53 -0400 Received: from il.qumranet.com ([82.166.9.18]:47553 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933228AbXDAOfo (ORCPT ); Sun, 1 Apr 2007 10:35:44 -0400 From: Avi Kivity To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Avi Kivity Subject: [PATCH 27/41] KVM: Don't allow the guest to turn off the cpu cache Date: Sun, 1 Apr 2007 17:35:24 +0300 Message-Id: <11754381391993-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.0.5 In-Reply-To: <1175438139141-git-send-email-avi@qumranet.com> References: <1175438138288-git-send-email-avi@qumranet.com> <11754381381990-git-send-email-avi@qumranet.com> <11754381384009-git-send-email-avi@qumranet.com> <1175438138805-git-send-email-avi@qumranet.com> <11754381382515-git-send-email-avi@qumranet.com> <11754381383730-git-send-email-avi@qumranet.com> <11754381383144-git-send-email-avi@qumranet.com> <11754381381597-git-send-email-avi@qumranet.com> <1175438139242-git-send-email-avi@qumranet.com> <1175438139494-git-send-email-avi@qumranet.com> <11754381392046-git-send-email-avi@qumranet.com> <1175438139795-git-send-email-avi@qumranet.com> <1175438139430-git-send-email-avi@qumranet.com> <11754381393496-git-send-email-avi@qumranet.com> <11754381391514-git-send-email-avi@qumranet.com> <11754381392382-git-send-email-avi@qumranet.com> <11754381392358-git-send-email-avi@qumranet.com> <1175438139872-git-send-email-avi@qumranet.com> <11754381392921-git-send-email-avi@qumranet.com> <117543813978-git-send-email-avi@qumranet.com> <117543 81393061-git-send-email-avi@qumranet.com> <11754381392186-git-send-email-avi@qumranet.com> <117543813916-git-send-email-avi@qumranet.com> <1175438139530-git-send-email-avi@qumranet.com> <1175438139960-git-send-email-avi@qumranet.com> <1175438139816-git-send-email-avi@qumranet.com> <1175438139141-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The cpu cache is a host resource; the guest should not be able to turn it off (even for itself). Signed-off-by: Avi Kivity --- drivers/kvm/svm.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index d3cc115..191bc45 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -737,8 +737,10 @@ static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) } #endif vcpu->svm->cr0 = cr0; - vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK | CR0_WP_MASK; vcpu->cr0 = cr0; + cr0 |= CR0_PG_MASK | CR0_WP_MASK; + cr0 &= ~(CR0_CD_MASK | CR0_NW_MASK); + vcpu->svm->vmcb->save.cr0 = cr0; } static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) -- 1.5.0.5