path: root/arch
diff options
authorChristian Borntraeger <cborntra@de.ibm.com>2006-09-28 16:55:46 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-28 16:55:46 +0200
commit0efa470363699ecba49e67cc3c75f46b300f98a4 (patch)
treea27ea609d8a45369fa47d016839fc94db8f80cdb /arch
parentd9f7a745d55527d0d41684b22506a86c4381f7f1 (diff)
[S390] config option for z9-109 code generation.
Add a kernel config option for the IBM System z9. This will produce faster code on newer compilers using the -march=z9-109 option. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b6b42f9f0d5..f900a516f09 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -153,6 +153,14 @@ config MARCH_Z990
This will be slightly faster but does not work on
older machines such as the z900.
+config MARCH_Z9_109
+ bool "IBM System z9"
+ help
+ Select this to enable optimizations for IBM System z9-109, IBM
+ System z9 Enterprise Class (z9 EC), and IBM System z9 Business
+ Class (z9 BC). The kernel will be slightly faster but will not
+ work on older machines such as the z990, z890, z900, and z800.
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 74ef57dcfa6..5deb9f7544a 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -33,6 +33,7 @@ endif
cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
+cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
# Prevent tail-call optimizations, to get clearer backtraces: