arm64: sve: Provide a conditional update accessor for ZCR_ELx

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A common pattern is to conditionally update ZCR_ELx in order
to avoid the "self-synchronizing" effect that writing to this
register has.

Let's provide an accessor that does exactly this.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Marc Zyngier 2021-03-18 09:43:03 +00:00

parent 468f3477ef

commit 71ce1ae56e

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arch/arm64/include/asm/fpsimd.h

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