Will Deacon bd4fb6d270 arm64: Add support for SB barrier and patch in over DSB; ISB sequences ... We currently use a DSB; ISB sequence to inhibit speculation in set_fs(). Whilst this works for current CPUs, future CPUs may implement a new SB barrier instruction which acts as an architected speculation barrier. On CPUs that support it, patch in an SB; NOP sequence over the DSB; ISB sequence and advertise the presence of the new instruction to userspace. Signed-off-by: Will Deacon <will.deacon@arm.com>		2018-12-06 16:47:04 +00:00
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asm	arm64: Add support for SB barrier and patch in over DSB; ISB sequences	2018-12-06 16:47:04 +00:00
uapi/asm	arm64: Add support for SB barrier and patch in over DSB; ISB sequences	2018-12-06 16:47:04 +00:00