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KVM: x86: disallow multiple KVM_CREATE_IRQCHIP

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Otherwise kvm will leak memory on multiple KVM_CREATE_IRQCHIP.
Also serialize multiple accesses with kvm->lock.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Marcelo Tosatti
2009-10-29 13:44:15 -02:00
committed by Avi Kivity
parent 92c0d90015
commit 3ddea128ad
2 changed files with 27 additions and 9 deletions
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6
arch/x86/kvm/irq.h
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@ -86,7 +86,11 @@ static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
static inline int irqchip_in_kernel(struct kvm *kvm)
{
return pic_irqchip(kvm) != NULL;
int ret;
ret = (pic_irqchip(kvm) != NULL);
smp_rmb();
return ret;
}
void kvm_pic_reset(struct kvm_kpic_state *s);