| commit | c8366ba0fb65063b6b4f69c7af1ea74152435590 | [log] [tgz] |
|---|---|---|
| author | Will Deacon <will.deacon@arm.com> | Tue Mar 31 14:11:24 2015 +0100 |
| committer | Will Deacon <will.deacon@arm.com> | Mon Jul 27 15:28:51 2015 +0100 |
| tree | 5e1b7a728baa9428185c8339d33344cf35037b8d | |
| parent | 084f903727e1c3a61d6bcdaeeed30bddc6d7f65a [diff] |
arm64: xchg: 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 xchg primitives so that the LSE swp instruction (yes, you read right!) is 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>