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KVM: SVM: Allow setting the SVME bit

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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>
This commit is contained in:
Alexander Graf 2008-11-25 20:17:10 +01:00 committed by Avi Kivity
parent eb6f302edf
commit 236de05553
1 changed files with 8 additions and 0 deletions
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8
arch/x86/kvm/svm.c
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@ -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)