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authorHeiko Carstens <heiko.carstens@de.ibm.com>2012-05-14 10:12:41 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-05-16 14:42:43 +0200
commit0544516956c0b949e3190f744df4b473f5ad4853 (patch)
tree68c07cd44744ce769f42bbeaa7856c9336d6c417 /arch/s390
parents390/entry64: avoid SPP code duplication (diff)
downloadlinux-0544516956c0b949e3190f744df4b473f5ad4853.tar.xz
linux-0544516956c0b949e3190f744df4b473f5ad4853.zip
s390/Kconfig: add HAVE_MARCH_[ARCH]_FEATURES Kconfig symbols
Add HAVE_MARCH_[ARCH]_FEATURES Kconfig symbols. Whenever there is code that needs an instruction that is only present beginning with a hardware generation the #ifdef chain can become quite long. To avoid this add the new Kconfig symbols which are selected if the kernel gets compiled for at least the specified symbol. If for example the kernel gets compiled for z196 this means that also all symbols for all previous architure features are set. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 354c0fe72ae3..b42f2866594b 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -234,6 +234,25 @@ config KEYS_COMPAT
config AUDIT_ARCH
def_bool y
+config HAVE_MARCH_Z900_FEATURES
+ def_bool n
+
+config HAVE_MARCH_Z990_FEATURES
+ def_bool n
+ select HAVE_MARCH_Z900_FEATURES
+
+config HAVE_MARCH_Z9_109_FEATURES
+ def_bool n
+ select HAVE_MARCH_Z990_FEATURES
+
+config HAVE_MARCH_Z10_FEATURES
+ def_bool n
+ select HAVE_MARCH_Z9_109_FEATURES
+
+config HAVE_MARCH_Z196_FEATURES
+ def_bool n
+ select HAVE_MARCH_Z10_FEATURES
+
comment "Code generation options"
choice
@@ -249,6 +268,7 @@ config MARCH_G5
config MARCH_Z900
bool "IBM zSeries model z800 and z900"
+ select HAVE_MARCH_Z900_FEATURES if 64BIT
help
Select this to enable optimizations for model z800/z900 (2064 and
2066 series). This will enable some optimizations that are not
@@ -256,6 +276,7 @@ config MARCH_Z900
config MARCH_Z990
bool "IBM zSeries model z890 and z990"
+ select HAVE_MARCH_Z990_FEATURES if 64BIT
help
Select this to enable optimizations for model z890/z990 (2084 and
2086 series). The kernel will be slightly faster but will not work
@@ -263,6 +284,7 @@ config MARCH_Z990
config MARCH_Z9_109
bool "IBM System z9"
+ select HAVE_MARCH_Z9_109_FEATURES if 64BIT
help
Select this to enable optimizations for IBM System z9 (2094 and
2096 series). The kernel will be slightly faster but will not work
@@ -270,6 +292,7 @@ config MARCH_Z9_109
config MARCH_Z10
bool "IBM System z10"
+ select HAVE_MARCH_Z10_FEATURES if 64BIT
help
Select this to enable optimizations for IBM System z10 (2097 and
2098 series). The kernel will be slightly faster but will not work
@@ -277,6 +300,7 @@ config MARCH_Z10
config MARCH_Z196
bool "IBM zEnterprise 114 and 196"
+ select HAVE_MARCH_Z196_FEATURES if 64BIT
help
Select this to enable optimizations for IBM zEnterprise 114 and 196
(2818 and 2817 series). The kernel will be slightly faster but will