KVM: SVM: Allow setting the SVME bit (236de055) · Commits · 戴 / test

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:

Joerg Roedel <joro@8bytes.org> Signed-off-by:

Alexander Graf <agraf@suse.de> Signed-off-by:

Avi Kivity <avi@redhat.com>

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)

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