Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760222AbYAYU5S (ORCPT ); Fri, 25 Jan 2008 15:57:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755046AbYAYU5G (ORCPT ); Fri, 25 Jan 2008 15:57:06 -0500 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:56960 "EHLO outbound7-sin-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754502AbYAYU5D (ORCPT ); Fri, 25 Jan 2008 15:57:03 -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" , kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org cc: "Joerg Roedel" Subject: [PATCH 2/8] SVM: add detection of Nested Paging feature Date: Fri, 25 Jan 2008 21:53:07 +0100 Message-ID: <1201294393-22613-3-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1201294393-22613-1-git-send-email-joerg.roedel@amd.com> References: <1201294393-22613-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 25 Jan 2008 20:53:14.0583 (UTC) FILETIME=[4DD78E70:01C85F94] MIME-Version: 1.0 X-WSS-ID: 6B8493B50QK8882643-01-01 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 Content-Length: 1189 Lines: 44 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 0c58527..49bb57a 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/