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| author | Christian Borntraeger <cborntra@de.ibm.com> | 2006-09-28 16:55:46 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-28 16:55:46 +0200 |
| commit | 0efa470363699ecba49e67cc3c75f46b300f98a4 (patch) | |
| tree | a27ea609d8a45369fa47d016839fc94db8f80cdb /arch | |
| parent | d9f7a745d55527d0d41684b22506a86c4381f7f1 (diff) | |
| download | lwn-0efa470363699ecba49e67cc3c75f46b300f98a4.tar.gz lwn-0efa470363699ecba49e67cc3c75f46b300f98a4.zip | |
[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/Kconfig | 8 | ||||
| -rw-r--r-- | arch/s390/Makefile | 1 |
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 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. + endchoice config 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 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: |