2 files changed, 13 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4ff0c271f125..d0764a258047 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5533,7 +5533,15 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
 
 int kvm_arch_hardware_enable(void *garbage)
 {
+        struct kvm *kvm;
+        struct kvm_vcpu *vcpu;
+        int i;
+
         kvm_shared_msr_cpu_online();
+        list_for_each_entry(kvm, &vm_list, vm_list)
+                kvm_for_each_vcpu(i, vcpu, kvm)
+                        if (vcpu->cpu == smp_processor_id())
+                                kvm_request_guest_time_update(vcpu);
         return kvm_x86_ops->hardware_enable(garbage);
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 5186e728c53e..da117a6b1e2e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1961,7 +1961,9 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
         case CPU_STARTING:
                 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
                        cpu);
+                spin_lock(&kvm_lock);
                 hardware_enable(NULL);
+                spin_unlock(&kvm_lock);
                 break;
         }
         return NOTIFY_OK;
@@ -2168,8 +2170,10 @@ static int kvm_suspend(struct sys_device *dev, pm_message_t state)
 
 static int kvm_resume(struct sys_device *dev)
 {
-        if (kvm_usage_count)
+        if (kvm_usage_count) {
+                WARN_ON(spin_is_locked(&kvm_lock));
                 hardware_enable(NULL);
+        }
         return 0;
 }