powerpc: Add CONFIG_VSX config option

Add CONFIG_VSX config build option.  Must compile with POWER4, FPU and ALTIVEC.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index c66b8ed7e7d9..5bc4b611ff88 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -160,6 +160,22 @@ config ALTIVEC
 
           If in doubt, say Y here.
 
+config VSX
+        bool "VSX Support"
+        depends on POWER4 && ALTIVEC && PPC_FPU
+        ---help---
+
+          This option enables kernel support for the Vector Scaler extensions
+          to the PowerPC processor. The kernel currently supports saving and
+          restoring VSX registers, and turning on the 'VSX enable' bit so user
+          processes can execute VSX instructions.
+
+          This option is only useful if you have a processor that supports
+          VSX (P7 and above), but does not have any affect on a non-VSX
+          CPUs (it does, however add code to the kernel).
+
+          If in doubt, say Y here.
+
 config SPE
         bool "SPE Support"
         depends on E200 || (E500 && !PPC_E500MC)