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authorTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>2010-11-16 17:35:02 +0900
committerAvi Kivity <avi@redhat.com>2011-01-12 11:29:28 +0200
commit97e91e28fa8fcbac30beab3de72060ada27d5671 (patch)
treeb6a1331007935961eb25157e7cceba13d9587090 /virt
parente730b63cc083852551b092e1c93f0ef22c25f220 (diff)
downloadlinux-stericsson-97e91e28fa8fcbac30beab3de72060ada27d5671.tar.gz
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: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4023264c4cd5..f69fca7a88b5 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -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",