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KVM: SVM: add detection of Nested Paging feature

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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@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Joerg Roedel 2008-02-07 13:47:39 +01:00 • committed by Avi Kivity
parent 33bd6a0b3e
commit e3da3acdb3
1 changed files with 8 additions and 0 deletions
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8
arch/x86/kvm/svm.c
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@ -47,6 +47,8 @@ MODULE_LICENSE("GPL");
#define SVM_FEATURE_LBRV (1 << 1) #define SVM_FEATURE_LBRV (1 << 1)
#define SVM_DEATURE_SVML (1 << 2) #define SVM_DEATURE_SVML (1 << 2)
static bool npt_enabled = false;
static void kvm_reput_irq(struct vcpu_svm *svm); static void kvm_reput_irq(struct vcpu_svm *svm);
static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) 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); 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; return 0;
err_2: err_2: