Peter Crosthwaite 1baa82f480 arm64: Implement cpu_relax as yield ... ARM64 has the yield nop hint which has the intended semantics of cpu_relax. Implement. The immediate application is ARM CPU emulators. An emulator can take advantage of the yield hint to de-prioritise an emulated CPU in favor of other emulation tasks. QEMU A64 SMP emulation has yield awareness, and sees a significant boot time performance increase with this change. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2015-03-17 10:17:29 +00:00
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asm	arm64: Implement cpu_relax as yield	2015-03-17 10:17:29 +00:00
uapi/asm	Fairly small update, but there are some interesting new features.	2015-02-13 09:55:09 -08:00