[PATCH] arm64: smccc: Remove broken support for SMCCCv1.3 SVE discard hint

Will Deacon will at kernel.org
Thu Nov 7 04:19:28 PST 2024


On Wed, 06 Nov 2024 16:04:48 +0000, Mark Rutland wrote:
> SMCCCv1.3 added a hint bit which callers can set in an SMCCC function ID
> (AKA "FID") to indicate that it is acceptable for the SMCCC
> implementation to discard SVE and/or SME state over a specific SMCCC
> call. The kernel support for using this hint is broken and SMCCC calls
> may clobber the SVE and/or SME state of arbitrary tasks, though FPSIMD
> state is unaffected.
> 
> [...]

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

[1/1] arm64: smccc: Remove broken support for SMCCCv1.3 SVE discard hint
      https://git.kernel.org/arm64/c/8c462d56487e

Cheers,
-- 
Will

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



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