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authorNicholas Piggin <npiggin@gmail.com>2018-02-20 22:08:30 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2018-04-01 14:52:52 +0300
commita73657ea19aeb92f98438263d42f90188f115d58 (patch)
tree7971c9025369b30fab25b416136f40bd24961bbf /arch/powerpc/Makefile
parent471d7ff8b51b63521c8ea35c51966ab4caa434ee (diff)
downloadlinux-a73657ea19aeb92f98438263d42f90188f115d58.tar.xz
powerpc/64: Add GENERIC_CPU support for little endian
Add GENERIC_CPU support for little-endian rather than using POWER8 specific selection for POWER9 and above. Restrict GENERIC_CPU to POWER8 and above on little endian. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Duplicate GENERIC_CPU to avoid a kbuild warning about the prompt being redefined. Spell out that GENERIC means >= POWER4 for BE.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 373d7f5b7cde..d6fa14077763 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -146,8 +146,13 @@ CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD)
CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
ifeq ($(CONFIG_PPC_BOOK3S_64),y)
+ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
+CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
+CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power8)
+else
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
+endif
else
CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
endif