powerpc: Add 64-bit CPU targets for gcc

Add a menu to select various 64-bit CPU targets for gcc. We
default to -mtune=power7 and if gcc doesn't understand that we
fallback to -mtune=power4.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 52e70f9b7a8f..0b7314592134 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -78,6 +78,36 @@ config PPC_BOOK3E_64
 
 endchoice
 
+choice
+        prompt "CPU selection"
+        depends on PPC64
+        default GENERIC_CPU
+        help
+          This will create a kernel which is optimised for a particular CPU.
+          The resulting kernel may not run on other CPUs, so use this with care.
+
+          If unsure, select Generic.
+
+config GENERIC_CPU
+        bool "Generic"
+
+config CELL_CPU
+        bool "Cell Broadband Engine"
+
+config POWER4_CPU
+        bool "POWER4"
+
+config POWER5_CPU
+        bool "POWER5"
+
+config POWER6_CPU
+        bool "POWER6"
+
+config POWER7_CPU
+        bool "POWER7"
+
+endchoice
+
 config PPC_BOOK3S
         def_bool y
         depends on PPC_BOOK3S_32 || PPC_BOOK3S_64