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authorMark Rutland <mark.rutland@arm.com>2013-10-24 20:30:18 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2013-10-25 11:33:21 +0100
commit9327e2c6bb8cb0131b38a07847cd58c78dc095e9 (patch)
treea326739547f5521d1c1b2d228081f52466609e6c /arch/arm64/Kconfig
parentarm64: read enable-method for CPU0 (diff)
downloadlinux-dev-9327e2c6bb8cb0131b38a07847cd58c78dc095e9.tar.xz
linux-dev-9327e2c6bb8cb0131b38a07847cd58c78dc095e9.zip
arm64: add CPU_HOTPLUG infrastructure
This patch adds the basic infrastructure necessary to support CPU_HOTPLUG on arm64, based on the arm implementation. Actual hotplug support will depend on an implementation's cpu_operations (e.g. PSCI). Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9e8233b3f188..86ebfe499d6a 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -161,6 +161,13 @@ config NR_CPUS
default "8" if ARCH_XGENE
default "4"
+config HOTPLUG_CPU
+ bool "Support for hot-pluggable CPUs"
+ depends on SMP
+ help
+ Say Y here to experiment with turning CPUs off and on. CPUs
+ can be controlled through /sys/devices/system/cpu.
+
source kernel/Kconfig.preempt
config HZ