Index: sys/dev/bhnd/bhndb/bhndb.h
===================================================================
--- sys/dev/bhnd/bhndb/bhndb.h
+++ sys/dev/bhnd/bhndb/bhndb.h
@@ -116,6 +116,7 @@
  * via which those mappings may be accessed.
  */
 struct bhndb_hwcfg {
+	bool is_hostb_required;
 	const struct resource_spec	*resource_specs;
 	const struct bhndb_regwin	*register_windows;
 };
Index: sys/dev/bhnd/bhndb/bhndb.c
===================================================================
--- sys/dev/bhnd/bhndb/bhndb.c
+++ sys/dev/bhnd/bhndb/bhndb.c
@@ -614,9 +614,12 @@
 	}
 
 	if (hostb == NULL) {
-		device_printf(sc->dev, "no host bridge core found\n");
-		error = ENODEV;
-		goto cleanup;
+		if(sc->bus_res->cfg->is_hostb_required){
+			device_printf(sc->dev, "no host bridge core found\n");
+			error = ENODEV;
+			goto cleanup;
+		}
+		device_printf(sc->dev, "WARNING: no host bridge core found\n");
 	}
 
 	/* Find our full register window configuration */