[Qemu-devel] [PATCH] sysbus: add irq_routing_notifier

[Eric Auger <eric.auger@linaro.org>]

Add a new irq_routing_notifier notifier and its setter. This
notifier is called on sysbus_connect_irq. The same notifier
is used for all interrupts.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
 hw/core/sysbus.c    | 9 +++++++++
 include/hw/sysbus.h | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c
index b53c351..26579f1 100644
--- a/hw/core/sysbus.c
+++ b/hw/core/sysbus.c
@@ -110,6 +110,9 @@ qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
 {
     qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
+    if (dev->irq_routing_notifier) {
+        dev->irq_routing_notifier(dev, irq);
+    }
 }
 
 /* Check whether an MMIO region exists */
@@ -307,6 +310,12 @@ MemoryRegion *sysbus_address_space(SysBusDevice *dev)
     return get_system_memory();
 }
 
+void sysbus_set_irq_routing_notifier(SysBusDevice *dev,
+                                     IRQRoutingNotifier notifier)
+{
+    dev->irq_routing_notifier = notifier;
+}
+
 static void sysbus_device_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
diff --git a/include/hw/sysbus.h b/include/hw/sysbus.h
index d1f3f00..84166d9 100644
--- a/include/hw/sysbus.h
+++ b/include/hw/sysbus.h
@@ -13,6 +13,7 @@
 #define SYSTEM_BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_SYSTEM_BUS)
 
 typedef struct SysBusDevice SysBusDevice;
+typedef void (*IRQRoutingNotifier)(SysBusDevice *dev, qemu_irq irq);
 
 #define TYPE_SYS_BUS_DEVICE "sys-bus-device"
 #define SYS_BUS_DEVICE(obj) \
@@ -55,6 +56,8 @@ struct SysBusDevice {
     } mmio[QDEV_MAX_MMIO];
     int num_pio;
     pio_addr_t pio[QDEV_MAX_PIO];
+
+    IRQRoutingNotifier irq_routing_notifier;
 };
 
 typedef int FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque);
@@ -100,4 +103,7 @@ static inline DeviceState *sysbus_try_create_simple(const char *name,
     return sysbus_try_create_varargs(name, addr, irq, NULL);
 }
 
+void sysbus_set_irq_routing_notifier(SysBusDevice *dev,
+                                     IRQRoutingNotifier notifier);
+
 #endif /* !HW_SYSBUS_H */
-- 
1.8.3.2