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s390: allow to compile with z16 optimizations

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Add config and compile options which allow to compile with z16
optimizations if the compiler supports it.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-07-20 14:28:08 +02:00
parent 6203ac3029
commit e69a7ff8d5
2 changed files with 21 additions and 0 deletions
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19
arch/s390/Kconfig
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@ -255,6 +255,10 @@ config HAVE_MARCH_Z15_FEATURES
def_bool n
select HAVE_MARCH_Z14_FEATURES
config HAVE_MARCH_Z16_FEATURES
def_bool n
select HAVE_MARCH_Z15_FEATURES
choice
prompt "Processor type"
default MARCH_Z196
@ -312,6 +316,14 @@ config MARCH_Z15
and 8561 series). The kernel will be slightly faster but will not
work on older machines.
config MARCH_Z16
bool "IBM z16"
select HAVE_MARCH_Z16_FEATURES
depends on $(cc-option,-march=z16)
help
Select this to enable optimizations for IBM z16 (3931 and
3932 series).
endchoice
config MARCH_Z10_TUNE
@ -332,6 +344,9 @@ config MARCH_Z14_TUNE
config MARCH_Z15_TUNE
def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
config MARCH_Z16_TUNE
def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
choice
prompt "Tune code generation"
default TUNE_DEFAULT
@ -372,6 +387,10 @@ config TUNE_Z15
bool "IBM z15"
depends on $(cc-option,-mtune=z15)
config TUNE_Z16
bool "IBM z16"
depends on $(cc-option,-mtune=z16)
endchoice
config 64BIT

2
arch/s390/Makefile
View File

@ -42,6 +42,7 @@ mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
mflags-$(CONFIG_MARCH_Z13) := -march=z13
mflags-$(CONFIG_MARCH_Z14) := -march=z14
mflags-$(CONFIG_MARCH_Z15) := -march=z15
mflags-$(CONFIG_MARCH_Z16) := -march=z16
export CC_FLAGS_MARCH := $(mflags-y)
@ -54,6 +55,7 @@ cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16
cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include