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>
This commit is contained in:
parent
471d7ff8b5
commit
a73657ea19
|
@ -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
|
||||
|
|
|
@ -87,7 +87,6 @@ endchoice
|
|||
choice
|
||||
prompt "CPU selection"
|
||||
depends on PPC64
|
||||
default POWER8_CPU if CPU_LITTLE_ENDIAN
|
||||
default GENERIC_CPU
|
||||
help
|
||||
This will create a kernel which is optimised for a particular CPU.
|
||||
|
@ -96,9 +95,14 @@ choice
|
|||
If unsure, select Generic.
|
||||
|
||||
config GENERIC_CPU
|
||||
bool "Generic"
|
||||
bool "Generic (POWER4 and above)"
|
||||
depends on !CPU_LITTLE_ENDIAN
|
||||
|
||||
config GENERIC_CPU
|
||||
bool "Generic (POWER8 and above)"
|
||||
depends on CPU_LITTLE_ENDIAN
|
||||
select ARCH_HAS_FAST_MULTIPLIER
|
||||
|
||||
config CELL_CPU
|
||||
bool "Cell Broadband Engine"
|
||||
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
|
||||
|
|
Loading…
Reference in New Issue