ppc/xics: add a XICSState backlink in ICPState

The link will be used to change the API of the icp_* routines which
are still using an XICSState as an argument.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/intc/xics.c

@@ -198,6 +198,7 @@ void xics_set_nr_servers(XICSState *xics, uint32_t nr_servers,
         object_initialize(icp, sizeof(*icp), typename);
         snprintf(name, sizeof(name), "icp[%d]", i);
         object_property_add_child(OBJECT(xics), name, OBJECT(icp), errp);
+        icp->xics = xics;
     }
 }
 

include/hw/ppc/xics.h

@@ -117,6 +117,8 @@ struct ICPState {
     uint8_t mfrr;
     qemu_irq output;
     bool cap_irq_xics_enabled;
+
+    XICSState *xics;
 };
 
 #define TYPE_ICS_BASE "ics-base"