linux-kernel - Re: [PATCH] arm64/ptrace: Flush FP state when setting ZT0

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Message-Id: <169108367979.2495938.10107968359301663426.b4-ty@arm.com>
Date:   Thu,  3 Aug 2023 18:28:15 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Oleg Nesterov <oleg@...hat.com>, Will Deacon <will@...nel.org>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] arm64/ptrace: Flush FP state when setting ZT0

On Thu, 03 Aug 2023 01:19:06 +0100, Mark Brown wrote:
> When setting ZT0 via ptrace we do not currently force a reload of the
> floating point register state from memory, do that to ensure that the newly
> set value gets loaded into the registers on next task execution.
> 
> The function was templated off the function for FPSIMD which due to our
> providing the option of embedding a FPSIMD regset within the SVE regset
> does not directly include the flush.
> 
> [...]

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

[1/1] arm64/ptrace: Flush FP state when setting ZT0
      https://git.kernel.org/arm64/c/89a65c3f170e

-- 
Catalin