powerpc: Little endian builds double word swap VSX state during context save/restore

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The elements within VSX loads and stores are big endian ordered
regardless of endianness. Our VSX context save/restore code uses
lxvd2x and stxvd2x which is a 2x doubleword operation. This means
the two doublewords will be swapped and we have to perform another
swap to undo it.

We need to do this on save and restore.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Anton Blanchard 2013-09-23 12:04:39 +10:00 • committed by Benjamin Herrenschmidt

parent 87fec0514f

commit 926f160f46

2 changed files with 20 additions and 4 deletions

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3

arch/powerpc/include/asm/ppc-opcode.h

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21

arch/powerpc/include/asm/ppc_asm.h

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