1 files changed, 8 insertions, 0 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index df5b41192661..0fbbde54ecae 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -69,6 +69,9 @@ static int npt = 1;
 
 module_param(npt, int, S_IRUGO);
 
+static int nested = 0;
+module_param(nested, int, S_IRUGO);
+
 static void kvm_reput_irq(struct vcpu_svm *svm);
 static void svm_flush_tlb(struct kvm_vcpu *vcpu);
 
@@ -443,6 +446,11 @@ static __init int svm_hardware_setup(void)
         if (boot_cpu_has(X86_FEATURE_NX))
                 kvm_enable_efer_bits(EFER_NX);
 
+        if (nested) {
+                printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
+                kvm_enable_efer_bits(EFER_SVME);
+        }
+
         for_each_online_cpu(cpu) {
                 r = svm_cpu_init(cpu);
                 if (r)