From e3da3acdb32c1804a5c853feebcc037b7434076f Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 7 Feb 2008 13:47:39 +0100 Subject: [PATCH] KVM: SVM: add detection of Nested Paging feature 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 Signed-off-by: Avi Kivity --- arch/x86/kvm/svm.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 5f527dc0e16..c12a75953b5 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: -- 2.41.1