[S390] Add config option for z196 code generation.

Add a kernel config option for the IBM zEnterprise 196. This will
produce faster code on newer compilers using the -march=z196 option.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 7afc1734050..21a7030abbb 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -287,6 +287,14 @@ config MARCH_Z10
           machines such as the z990, z890, z900, z800, z9-109, z9-ec
           and z9-bc.
 
+config MARCH_Z196
+        bool "IBM zEnterprise 196"
+        help
+          Select this to enable optimizations for IBM zEnterprise 196.
+          The kernel will be slightly faster but will not work on older
+          machines such as the z990, z890, z900, z800, z9-109, z9-ec,
+          z9-bc, z10-ec and z10-bc.
+
 endchoice
 
 config PACK_STACK