From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932237AbYBGMuw (ORCPT ); Thu, 7 Feb 2008 07:50:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755989AbYBGMsw (ORCPT ); Thu, 7 Feb 2008 07:48:52 -0500 Received: from outbound-va3.frontbridge.com ([216.32.180.16]:41185 "EHLO outbound6-va3-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758835AbYBGMsi (ORCPT ); Thu, 7 Feb 2008 07:48:38 -0500 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 139.95.251.8;Service: EHS X-Server-Uuid: 9D002D81-0D89-4A8A-BDDE-D174997CF0D6 From: "Joerg Roedel" To: "Avi Kivity" cc: kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, "Joerg Roedel" Subject: [PATCH 2/8] SVM: add detection of Nested Paging feature Date: Thu, 7 Feb 2008 13:47:39 +0100 Message-ID: <1202388465-8657-3-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1202388465-8657-1-git-send-email-joerg.roedel@amd.com> References: <1202388465-8657-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 07 Feb 2008 12:47:45.0673 (UTC) FILETIME=[A3075F90:01C86987] MIME-Version: 1.0 X-WSS-ID: 6BB421940QK10781164-03-01 Content-Type: text/plain Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Let SVM detect if the Nested Paging feature is available on the hardware. Disable it to keep this patch series bisectable. Signed-off-by: Joerg Roedel --- arch/x86/kvm/svm.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index c0aaa85..b037b27 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -47,6 +47,8 @@ MODULE_LICENSE("GPL"); #define SVM_FEATURE_LBRV (1 << 1) #define SVM_DEATURE_SVML (1 << 2) +static bool npt_enabled = false; + static void kvm_reput_irq(struct vcpu_svm *svm); static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) @@ -410,6 +412,12 @@ static __init int svm_hardware_setup(void) svm_features = cpuid_edx(SVM_CPUID_FUNC); + if (!svm_has(SVM_FEATURE_NPT)) + npt_enabled = false; + + if (npt_enabled) + printk(KERN_INFO "kvm: Nested Paging enabled\n"); + return 0; err_2: -- 1.5.3.7