1 files changed, 22 insertions, 0 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a9565e24063..7149a2e6552 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1514,6 +1514,28 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
         finish_wait(&vcpu->wq, &wait);
 }
 
+/*
+ * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode.
+ */
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+        int me;
+        int cpu = vcpu->cpu;
+        wait_queue_head_t *wqp;
+
+        wqp = kvm_arch_vcpu_wq(vcpu);
+        if (waitqueue_active(wqp)) {
+                wake_up_interruptible(wqp);
+                ++vcpu->stat.halt_wakeup;
+        }
+
+        me = get_cpu();
+        if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
+                if (kvm_arch_vcpu_should_kick(vcpu))
+                        smp_send_reschedule(cpu);
+        put_cpu();
+}
+
 void kvm_resched(struct kvm_vcpu *vcpu)
 {
         if (!need_resched())