--- a/arch/arm/mach-cns3xxx/Makefile
+++ b/arch/arm/mach-cns3xxx/Makefile
@@ -5,3 +5,5 @@ cns3xxx-y				+= core.o pm.o
 cns3xxx-$(CONFIG_ATAGS)			+= devices.o
 cns3xxx-$(CONFIG_PCI)			+= pcie.o
 cns3xxx-$(CONFIG_MACH_CNS3420VB)	+= cns3420vb.o
+cns3xxx-$(CONFIG_SMP)			+= platsmp.o headsmp.o
+cns3xxx-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o
--- a/arch/arm/mach-cns3xxx/Kconfig
+++ b/arch/arm/mach-cns3xxx/Kconfig
@@ -6,6 +6,9 @@ config ARCH_CNS3XXX
 	select MIGHT_HAVE_CACHE_L2X0
 	select MIGHT_HAVE_PCI
 	select PCI_DOMAINS if PCI
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if LOCAL_TIMERS
+	select HAVE_SMP
 	help
 	  Support for Cavium Networks CNS3XXX platform.
 
--- a/arch/arm/mach-cns3xxx/core.h
+++ b/arch/arm/mach-cns3xxx/core.h
@@ -11,6 +11,7 @@
 #ifndef __CNS3XXX_CORE_H
 #define __CNS3XXX_CORE_H
 
+extern struct smp_operations cns3xxx_smp_ops;
 extern void cns3xxx_timer_init(void);
 
 #ifdef CONFIG_CACHE_L2X0