tree a59241907d2f786c63ac03580b0c67a60dc3c3fc
parent 762a1f4388a22690cd4f848ba858e5f02d4bfc22
author Paul Burton <paul.burton@imgtec.com> 1405093614 +0100
committer Ralf Baechle <ralf@linux-mips.org> 1406930804 +0200

MIPS: 16 byte align MSA vector context

The MSA specification upon first read appears to suggest that it is safe
to perform vector loads & stores with arbitrary alignment. However it
leaves provision for "address-dependent exceptions"... Align the vector
context to a 16 byte boundary to ensure that the kernel cannot cause any
such exceptions.

Note that the fpu field of struct thread_struct was already at a 16 byte
boundary within the struct, the introduction of FPU_ALIGN simply makes
the requirement explicit. The only part of this impacting the generated
kernel binary is ARCH_MIN_TASKALIGN.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7308/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>