pc_q35: Initialize Xen.

Signed-off-by: NAnthony PERARD <anthony.perard@citrix.com>
Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 254c1282)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

hw/i386/pc_q35.c

@@ -81,6 +81,11 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     DeviceState *icc_bridge;
     PcGuestInfo *guest_info;
 
+    if (xen_enabled() && xen_hvm_init(&ram_memory) != 0) {
+        fprintf(stderr, "xen hardware virtual machine initialisation failed\n");
+        exit(1);
+    }
+
     icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
     object_property_add_child(qdev_get_machine(), "icc-bridge",
                               OBJECT(icc_bridge), NULL);