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powerpc/64s: Fix GENERIC_CPU build flags for PPC970 / G5
[ Upstream commit58ec7f06b7
] 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:471d7ff8b5
("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 Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -154,7 +154,7 @@ CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
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else
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
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CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4
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endif
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else ifdef CONFIG_PPC_BOOK3E_64
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CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
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