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(parent: 81bb5c6) | patch
arm64: bitops: patch in lse instructions when supported by the CPU
authorWill Deacon <will.deacon@arm.com>
Thu, 12 Feb 2015 04:17:37 +0000 (04:17 +0000)
committerWill Deacon <will.deacon@arm.com>
Mon, 27 Jul 2015 14:28:51 +0000 (15:28 +0100)
commit084f903727e1c3a61d6bcdaeeed30bddc6d7f65a
tree614b95211ba1f8b103ed8f8b9de13ee14a5fab8btree | snapshot (tar.gz zip)
parent81bb5c6420635dfd058c210bd342c29c95ccd145commit | diff
arm64: bitops: patch in lse instructions when supported by the CPU

On CPUs which support the LSE atomic instructions introduced in ARMv8.1,
it makes sense to use them in preference to ll/sc sequences.

This patch introduces runtime patching of our bitops functions so that
LSE atomic instructions are used instead.

Reviewed-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/include/asm/lse.h diff | blob | blame | history
arch/arm64/lib/bitops.S diff | blob | blame | history