Commit 50832720 authored Mar 30, 2023 by Michael Ellerman

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



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

parent 1eafbd87

arch/powerpc/Makefile

+1 −3

Original line number	Diff line number	Diff line
		@@ -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)

arch/powerpc/platforms/Kconfig.cputype

+7 −0

Original line number	Diff line number	Diff line
		@@ -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