arm64: barriers: introduce nops and __nops macros for NOP sequences

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NOP sequences tend to get used for padding out alternative sections
and uarch-specific pipeline flushes in errata workarounds.

This patch adds macros for generating these sequences as both inline
asm blocks, but also as strings suitable for embedding in other asm
blocks directly.

Signed-off-by: Will Deacon <will.deacon@arm.com>

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Will Deacon 2016-09-06 16:40:23 +01:00

parent 8a71f0c656

commit f99a250cb6

2 changed files with 12 additions and 0 deletions

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9

arch/arm64/include/asm/assembler.h

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3

arch/arm64/include/asm/barrier.h

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