diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c
index 278a2d1bdd..3c58629894 100644
--- a/hw/core/sysbus.c
+++ b/hw/core/sysbus.c
@@ -109,7 +109,13 @@ qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
 
 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
 {
+    SysBusDeviceClass *sbd = SYS_BUS_DEVICE_GET_CLASS(dev);
+
     qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
+
+    if (sbd->connect_irq_notifier) {
+        sbd->connect_irq_notifier(dev, irq);
+    }
 }
 
 /* Check whether an MMIO region exists */
diff --git a/include/hw/sysbus.h b/include/hw/sysbus.h
index 34f93c39bf..cc1dba49bf 100644
--- a/include/hw/sysbus.h
+++ b/include/hw/sysbus.h
@@ -58,6 +58,7 @@ typedef struct SysBusDeviceClass {
      * omitted then. (This is not considered a fatal error.)
      */
     char *(*explicit_ofw_unit_address)(const SysBusDevice *dev);
+    void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq);
 } SysBusDeviceClass;
 
 struct SysBusDevice {