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Commit 97e91e28 authored by Takuya Yoshikawa's avatar Takuya Yoshikawa Committed by Avi Kivity
Browse files

KVM: take kvm_lock for hardware_disable() during cpu hotplug 



In kvm_cpu_hotplug(), only CPU_STARTING case is protected by kvm_lock.
This patch adds missing protection for CPU_DYING case.

Signed-off-by: default avatarTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent e730b63c

virt/kvm/kvm_main.c

+2 −0
Original line number Diff line number Diff line
@@ -2140,7 +2140,9 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, 
	case CPU_DYING:

		printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",

		       cpu);

		spin_lock(&kvm_lock);

		hardware_disable(NULL);

		spin_unlock(&kvm_lock);

		break;

	case CPU_STARTING:

		printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",