1 files changed, 41 insertions, 1 deletions

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index b5cd8465d44f..0cefba28c864 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -547,6 +547,46 @@ int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
 			irq->level, irq->trig_mode, dest_map);
 }
 
+int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
+    		    unsigned long ipi_bitmap_high, int min,
+		    unsigned long icr, int op_64_bit)
+{
+	int i;
+	struct kvm_apic_map *map;
+	struct kvm_vcpu *vcpu;
+	struct kvm_lapic_irq irq = {0};
+	int cluster_size = op_64_bit ? 64 : 32;
+	int count = 0;
+
+	irq.vector = icr & APIC_VECTOR_MASK;
+	irq.delivery_mode = icr & APIC_MODE_MASK;
+	irq.level = (icr & APIC_INT_ASSERT) != 0;
+	irq.trig_mode = icr & APIC_INT_LEVELTRIG;
+
+	if (icr & APIC_DEST_MASK)
+		return -KVM_EINVAL;
+	if (icr & APIC_SHORT_MASK)
+		return -KVM_EINVAL;
+
+	rcu_read_lock();
+	map = rcu_dereference(kvm->arch.apic_map);
+
+	/* Bits above cluster_size are masked in the caller.  */
+	for_each_set_bit(i, &ipi_bitmap_low, BITS_PER_LONG) {
+		vcpu = map->phys_map[min + i]->vcpu;
+		count += kvm_apic_set_irq(vcpu, &irq, NULL);
+	}
+
+	min += cluster_size;
+	for_each_set_bit(i, &ipi_bitmap_high, BITS_PER_LONG) {
+		vcpu = map->phys_map[min + i]->vcpu;
+		count += kvm_apic_set_irq(vcpu, &irq, NULL);
+	}
+
+	rcu_read_unlock();
+	return count;
+}
+
 static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val)
 {
 
@@ -1379,7 +1419,7 @@ static void apic_timer_expired(struct kvm_lapic *apic)
 	 * using swait_active() is safe.
 	 */
 	if (swait_active(q))
-		swake_up(q);
+		swake_up_one(q);
 
 	if (apic_lvtt_tscdeadline(apic))
 		ktimer->expired_tscdeadline = ktimer->tscdeadline;