diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4fd479059d65ba6fa50198c4f0381821c3062ee4..10a0a5488a44f1c68ce90b7ba063ee06ac583b78 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -385,9 +385,15 @@ config NUMA
 
 config NODES_SHIFT
 	int
+	default "8" if PPC64
 	default "4"
 	depends on NEED_MULTIPLE_NODES
 
+config MAX_ACTIVE_REGIONS
+	int
+	default "256" if PPC64
+	default "32"
+
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
 	depends on PPC64