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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-09-21 11:41:02 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:10 +1000 |
| commit | 58ec7f06b74e0d6e76c4110afce367c8b5f0837d (patch) | |
| tree | 6dba67f69d3106df93ec6df1103cfc92f9052bd4 /arch/powerpc/Makefile | |
| parent | 9c7bfc2dc21e737e8e4a753630bce675e1e7c0ad (diff) | |
| download | lwn-58ec7f06b74e0d6e76c4110afce367c8b5f0837d.tar.gz lwn-58ec7f06b74e0d6e76c4110afce367c8b5f0837d.zip | |
powerpc/64s: Fix GENERIC_CPU build flags for PPC970 / G5
Big-endian GENERIC_CPU supports 970, but builds with -mcpu=power5.
POWER5 is ISA v2.02 whereas 970 is v2.01 plus Altivec. 2.02 added
the popcntb instruction which a compiler might use.
Use -mcpu=power4.
Fixes: 471d7ff8b51b ("powerpc/64s: Remove POWER4 support")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921014103.587954-1-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index cb01832385d0..3bed2c6dcf12 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -152,7 +152,7 @@ CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) else CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) -CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) +CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 endif else ifdef CONFIG_PPC_BOOK3E_64 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 |