xtensa: implement CPU hotplug

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 4b09c60b6b30..70a160be3464 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -140,6 +140,15 @@ config NR_CPUS
         range 2 32
         default "4"
 
+config HOTPLUG_CPU
+        bool "Enable CPU hotplug support"
+        depends on SMP
+        help
+          Say Y here to allow turning CPUs off and on. CPUs can be
+          controlled through /sys/devices/system/cpu.
+
+          Say N if you want to disable CPU hotplug.
+
 config MATH_EMULATION
         bool "Math emulation"
         help