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powerpc/boot: Disable vector instructions

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This will avoid auto-vectorisation when building with higher
optimisation levels.

We don't know if the machine can support VSX and even if it's present
it's probably not going to be enabled at this point in boot.

These flag were both added prior to GCC 4.6 which is the minimum
compiler version supported by upstream, thanks to Segher for the
details.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Joel Stanley 2018-10-10 13:15:22 +10:30 committed by Michael Ellerman
parent 1a855eaccf
commit e8e132e688
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/boot/Makefile
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@ -32,8 +32,8 @@ else
endif
BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -Os -msoft-float -pipe \
-fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
-fno-strict-aliasing -Os -msoft-float -mno-altivec -mno-vsx \
-pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
-D$(compress-y)
ifdef CONFIG_PPC64_BOOT_WRAPPER