xen/xenpv: Load xenpv as late as possible

On ARM, we only know that FreeBSD is running on Xen via a device tree node.
We have to delay xenpv initialization after the device tree has been fully
parsed.

diff --git a/sys/dev/xen/xenpv.c b/sys/dev/xen/xenpv.c
index 1ba6a46a54a786a4fd032d65f8cd9e578f0160c0..2b422adcd4a287e563cc562ed561f3cd7ceaac69 100644 (file)
--- a/sys/dev/xen/xenpv.c
+++ b/sys/dev/xen/xenpv.c
@@ -54,7 +54,11 @@ xenpv_identify(driver_t *driver, device_t parent)
        if (devclass_get_device(xenpv_devclass, 0))
                return;
 
-       if (BUS_ADD_CHILD(parent, 0, "xenpv", 0) == NULL)
+       /*
+        * Use a high order number so xenpv is attached after
+        * xenpci on HVM guests.
+        */
+       if (BUS_ADD_CHILD(parent, 100, "xenpv", 0) == NULL)
                panic("Unable to attach xenpv bus.");
 }