arm64/sve: Kconfig update and conditional compilation support
authorDave Martin <Dave.Martin@arm.com>
Tue, 31 Oct 2017 15:51:02 +0000 (15:51 +0000)
committerWill Deacon <will.deacon@arm.com>
Fri, 3 Nov 2017 15:24:14 +0000 (15:24 +0000)
commitddd25ad1fde8456810dee1b26a870395bcd6339d
tree22f1283f3d6ee3844b6d273f90d43314235cc201
parent1fc5dce78ad15dce2f23336d339e5f7290b61e19
arm64/sve: Kconfig update and conditional compilation support

This patch adds CONFIG_ARM64_SVE to control building of SVE support
into the kernel, and adds a stub predicate system_supports_sve() to
control conditional compilation and runtime SVE support.

system_supports_sve() just returns false for now: it will be
replaced with a non-trivial implementation in a later patch, once
SVE support is complete enough to be enabled safely.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/Kconfig
arch/arm64/include/asm/cpufeature.h