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Date: Mon, 31 Mar 2008 17:37:05 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Joerg Roedel <joerg.roedel@....com> Subject: [PATCH 21/40] KVM: SVM: add detection of Nested Paging feature From: Joerg Roedel <joerg.roedel@....com> 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 <joerg.roedel@....com> Signed-off-by: Avi Kivity <avi@...ranet.com> --- 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 5f527dc..c12a759 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) @@ -413,6 +415,12 @@ 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: -- 1.5.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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