powerpc: Add CONFIG_PPC64_ELF_ABI_V1 and CONFIG_PPC64_ELF_ABI_V2

At the time being, we use CONFIG_CPU_LITTLE_ENDIAN and
CONFIG_CPU_BIG_ENDIAN to pass -mabi=elfv1 or elfv2 to
compiler, then define a PPC64_ELF_ABI_v1 or PPC64_ELF_ABI_v2
macro in asm/types.h based on _CALL_ELF define set by the compiler.

Make it more straight forward with a CONFIG option that
is directly usable.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1eca1addbc550167da9841c7340a010d0c4b2200.1652074503.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index eb541e7..1ba98be 100644 (file)
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -89,10 +89,10 @@ endif
 
 ifdef CONFIG_PPC64
 ifndef CONFIG_CC_IS_CLANG
-cflags-$(CONFIG_CPU_BIG_ENDIAN)                += $(call cc-option,-mabi=elfv1)
-cflags-$(CONFIG_CPU_BIG_ENDIAN)                += $(call cc-option,-mcall-aixdesc)
-aflags-$(CONFIG_CPU_BIG_ENDIAN)                += $(call cc-option,-mabi=elfv1)
-aflags-$(CONFIG_CPU_LITTLE_ENDIAN)     += -mabi=elfv2
+cflags-$(CONFIG_PPC64_ELF_ABI_V1)      += $(call cc-option,-mabi=elfv1)
+cflags-$(CONFIG_PPC64_ELF_ABI_V1)      += $(call cc-option,-mcall-aixdesc)
+aflags-$(CONFIG_PPC64_ELF_ABI_V1)      += $(call cc-option,-mabi=elfv1)
+aflags-$(CONFIG_PPC64_ELF_ABI_V2)      += -mabi=elfv2
 endif
 endif
 
@@ -141,7 +141,7 @@ endif
 
 CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
 ifndef CONFIG_CC_IS_CLANG
-ifdef CONFIG_CPU_LITTLE_ENDIAN
+ifdef CONFIG_PPC64_ELF_ABI_V2
 CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
 else

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 5b156f9..8baa928 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -53,6 +53,8 @@ ifdef CONFIG_CPU_BIG_ENDIAN
 BOOTCFLAGS     += -mbig-endian
 else
 BOOTCFLAGS     += -mlittle-endian
+endif
+ifdef CONFIG_PPC64_ELF_ABI_V2
 BOOTCFLAGS     += $(call cc-option,-mabi=elfv2)
 endif
 

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 9d099dc..942606b 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -552,6 +552,12 @@ config CPU_LITTLE_ENDIAN
 
 endchoice
 
+config PPC64_ELF_ABI_V1
+       def_bool PPC64 && CPU_BIG_ENDIAN
+
+config PPC64_ELF_ABI_V2
+       def_bool PPC64 && CPU_LITTLE_ENDIAN
+
 config PPC64_BOOT_WRAPPER
        def_bool n
        depends on CPU_LITTLE_ENDIAN