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MIPS: mark MSA experimental

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In light of the commit 16f77de82f (Revert "MIPS: Save/restore MSA
context around signals") the MSA support in the kernel is incomplete.
Until the replacement for the former sigcontext changes is agreed upon
and in tree, mark MSA experimental & disable it by default.

MSA is only implemented by one CPU supported by the kernel, the P5600.
The P5600 is a 32 bit core, and thus MSA can only be used when the
experimental CONFIG_MIPS_O32_FP64_SUPPORT option is enabled. Therefore
MSA is only being used in experimental settings anyway and this change
doesn't actually make any difference beyond clarifying the state of
MSA support.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7311/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2014-07-11 16:47:25 +01:00 committed by Ralf Baechle
parent 2a6cb6690f
commit 4af94d5d09
1 changed files with 1 additions and 2 deletions
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3
arch/mips/Kconfig
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@ -2115,10 +2115,9 @@ config CPU_MICROMIPS
microMIPS ISA
config CPU_HAS_MSA
bool "Support for the MIPS SIMD Architecture"
bool "Support for the MIPS SIMD Architecture (EXPERIMENTAL)"
depends on CPU_SUPPORTS_MSA
depends on 64BIT || MIPS_O32_FP64_SUPPORT
default y
help
MIPS SIMD Architecture (MSA) introduces 128 bit wide vector registers
and a set of SIMD instructions to operate on them. When this option