[ARM SMP] Add configuration option for ARMv6K processors

The 'K' extension adds several new instructions to the ARMv6 ISA
which are primerily useful for SMP.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 5568403e984d..e3c14d6b4328 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -250,6 +250,18 @@ config CPU_V6
         select CPU_COPY_V6
         select CPU_TLB_V6
 
+# ARMv6k
+config CPU_32v6K
+        bool "Support ARM V6K processor extensions" if !SMP
+        depends on CPU_V6
+        default y if SMP
+        help
+          Say Y here if your ARMv6 processor supports the 'K' extension.
+          This enables the kernel to use some instructions not present
+          on previous processors, and as such a kernel build with this
+          enabled will not boot on processors with do not support these
+          instructions.
+
 # Figure out what processor architecture version we should be using.
 # This defines the compiler instruction set which depends on the machine type.
 config CPU_32v3