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(parent: 9c7bfc2) | patch
powerpc/64s: Fix GENERIC_CPU build flags for PPC970 / G5
authorNicholas Piggin <npiggin@gmail.com>
Wed, 21 Sep 2022 01:41:02 +0000 (11:41 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 28 Sep 2022 09:22:10 +0000 (19:22 +1000)
commit58ec7f06b74e0d6e76c4110afce367c8b5f0837d
tree6dba67f69d3106df93ec6df1103cfc92f9052bd4tree | snapshot
parent9c7bfc2dc21e737e8e4a753630bce675e1e7c0adcommit | diff
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
arch/powerpc/Makefile diff | blob | history
Domain: System / Kernel;