qtest: IRQ interception infrastructure

Since /i440fx/piix3 is being removed from the composition tree, the
IO-APIC is placed under /i440fx.  This is wrong and should be changed
as soon as the /i440fx/piix3 path is put back.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/irq.h b/hw/irq.h
index 64da2fd..56c55f0 100644
--- a/hw/irq.h
+++ b/hw/irq.h
@@ -38,4 +38,9 @@
  */
 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
 
+/* For internal use in qtest.  Similar to qemu_irq_split, but operating
+   on an existing vector of qemu_irq.  */
+void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
+void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n);
+
 #endif