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powerpc/64s: Move CPU -mtune options into Kconfig

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Currently the -mtune options are set in the Makefile, depending on what
the compiler supports.

One downside of doing it that way is that the chosen -mtune option is
not recorded in the .config.

Another downside is that if there's ever a need to do more complicated
logic to calculate the correct option, that gets messy in the Makefile.

So move the determination of which -mtune option to use into Kconfig
logic.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230329234308.2215833-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2023-03-30 10:43:08 +11:00
parent 1eafbd8764
commit 50832720ec
2 changed files with 8 additions and 3 deletions
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4
arch/powerpc/Makefile
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@ -157,9 +157,7 @@ endif
CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10, \
$(call cc-option,-mtune=power9, \
$(call cc-option,-mtune=power8)))
CFLAGS-y += $(CONFIG_TUNE_CPU)
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)

7
arch/powerpc/platforms/Kconfig.cputype
View File

@ -275,6 +275,13 @@ config TARGET_CPU
default "e500mc" if E500MC_CPU
default "powerpc" if POWERPC_CPU
config TUNE_CPU
string
depends on POWERPC64_CPU
default "-mtune=power10" if $(cc-option,-mtune=power10)
default "-mtune=power9" if $(cc-option,-mtune=power9)
default "-mtune=power8" if $(cc-option,-mtune=power8)
config PPC_BOOK3S
def_bool y
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64