diff options
| author |   Anton Blanchard <anton@samba.org> | 2012-04-17 18:45:28 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-04-30 15:37:27 +1000 |
| commit | d23c6fb4ebf7d3563dd801c95b22ada4516e35ce (patch) | |
| tree | 2de1bad46e8c2909835e7e014b43fde87d866fc3 /arch/powerpc | |
| parent | powerpc: Remove altivec fix for gcc versions before 4.0 (diff) | |
| download | linux-dev-d23c6fb4ebf7d3563dd801c95b22ada4516e35ce.tar.xz linux-dev-d23c6fb4ebf7d3563dd801c95b22ada4516e35ce.zip | |
powerpc: Add 64-bit CPU targets for gcc
Add a menu to select various 64-bit CPU targets for gcc. We
default to -mtune=power7 and if gcc doesn't understand that we
fallback to -mtune=power4.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Makefile | 25 | ||||
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 30 |
2 files changed, 42 insertions, 13 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 6ee3beb4d264..159e94f4b22a 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -69,6 +69,16 @@ LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=no -mcall-aixdesc CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple + +CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) +CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) +CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) +CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) +CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) +CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) + +CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell) + KBUILD_CPPFLAGS += -Iarch/$(ARCH) KBUILD_AFLAGS += -Iarch/$(ARCH) KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y) @@ -76,22 +86,11 @@ CPP = $(CC) -E $(KBUILD_CFLAGS) CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ -ifeq ($(CONFIG_PPC64),y) -ifeq ($(CONFIG_POWER4_ONLY),y) - KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) -else - KBUILD_CFLAGS += $(call cc-option,-mtune=power4) -endif -endif - KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o -ifeq ($(CONFIG_TUNE_CELL),y) - KBUILD_CFLAGS += $(call cc-option,-mtune=cell) -endif - -# No AltiVec instruction when building kernel +# No AltiVec or VSX instructions when building kernel KBUILD_CFLAGS += $(call cc-option,-mno-altivec) +KBUILD_CFLAGS += $(call cc-option,-mno-vsx) # No SPE instruction when building kernel # (We use all available options to help semi-broken compilers) diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 52e70f9b7a8f..0b7314592134 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -78,6 +78,36 @@ config PPC_BOOK3E_64 endchoice +choice + prompt "CPU selection" + depends on PPC64 + default GENERIC_CPU + help + This will create a kernel which is optimised for a particular CPU. + The resulting kernel may not run on other CPUs, so use this with care. + + If unsure, select Generic. + +config GENERIC_CPU + bool "Generic" + +config CELL_CPU + bool "Cell Broadband Engine" + +config POWER4_CPU + bool "POWER4" + +config POWER5_CPU + bool "POWER5" + +config POWER6_CPU + bool "POWER6" + +config POWER7_CPU + bool "POWER7" + +endchoice + config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 |