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authorChristian Borntraeger <cborntra@de.ibm.com>2006-09-28 10:55:46 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-28 10:55:46 -0400
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')
-rw-r--r--arch/s390/Kconfig8
-rw-r--r--arch/s390/Makefile1
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b6b42f9f0d52..f900a516f099 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -153,6 +153,14 @@ config MARCH_Z990
153 This will be slightly faster but does not work on 153 This will be slightly faster but does not work on
154 older machines such as the z900. 154 older machines such as the z900.
155 155
156config MARCH_Z9_109
157 bool "IBM System z9"
158 help
159 Select this to enable optimizations for IBM System z9-109, IBM
160 System z9 Enterprise Class (z9 EC), and IBM System z9 Business
161 Class (z9 BC). The kernel will be slightly faster but will not
162 work on older machines such as the z990, z890, z900, and z800.
163
156endchoice 164endchoice
157 165
158config PACK_STACK 166config PACK_STACK
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 74ef57dcfa60..5deb9f7544a1 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -33,6 +33,7 @@ endif
33cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5) 33cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
34cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900) 34cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
35cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990) 35cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
36cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
36 37
37# 38#
38# Prevent tail-call optimizations, to get clearer backtraces: 39# Prevent tail-call optimizations, to get clearer backtraces: