Index: sys/arm64/arm64/trap.c
===================================================================
--- sys/arm64/arm64/trap.c
+++ sys/arm64/arm64/trap.c
@@ -334,7 +334,8 @@
 					return;
 			}
 #endif
-			panic("vm_fault failed: %lx", frame->tf_elr);
+			panic("vm_fault failed: %lx error %d",
+			    frame->tf_elr, error);
 		}
 	}