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Commit 236de055 authored by Alexander Graf's avatar Alexander Graf Committed by Avi Kivity
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KVM: SVM: Allow setting the SVME bit 



Normally setting the SVME bit in EFER is not allowed, as we did
not support SVM. Not since we do, we should also allow enabling
SVM mode.

v2 comes as last patch, so we don't enable half-ready code
v4 introduces a module option to enable SVM
v6 warns that nesting is enabled

Acked-by: default avatarJoerg Roedel <joro@8bytes.org>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent eb6f302e

arch/x86/kvm/svm.c

+8 −0
Original line number Diff line number Diff line
@@ -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)