Re: [PATCH v5] arm64: smccc: Support SMCCC v1.3 SVE register saving hint

On Tue, 1 Jun 2021 14:04:19 +0100, Mark Brown wrote:

SMCCC v1.2 requires that all SVE state be preserved over SMC calls which
introduces substantial overhead in the common case where there is no SVE
state in the registers. To avoid this SMCCC v1.3 introduces a flag which
allows the caller to say that there is no state that needs to be preserved
in the registers. Make use of this flag, setting it if the SMCCC version
indicates support for it and the TIF_ flags indicate that there is no live
SVE state in the registers, this avoids placing any constraints on when
SMCCC calls can be done or triggering extra saving and reloading of SVE
register state in the kernel.

[...]

Applied to arm64 (for-next/smccc), thanks!

[1/1] arm64: smccc: Support SMCCC v1.3 SVE register saving hint
      https://git.kernel.org/arm64/c/0a284a999fed

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev

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