linux-kernel - Re: [PATCH 0/2] arm64/fp: Fix missing invalidation when working with in memory FP state

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Message-Id: <173090098098.2905624.10744681189844988391.b4-ty@kernel.org>
Date: Wed,  6 Nov 2024 15:53:22 +0000
From: Will Deacon <will@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>,
	Mark Brown <broonie@...nel.org>
Cc: kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH 0/2] arm64/fp: Fix missing invalidation when working with in memory FP state

On Wed, 30 Oct 2024 20:23:49 +0000, Mark Brown wrote:
> Mark Rutland identified a repeated pattern where we update the in memory
> floating point state for tasks but do not invalidate the tracking of the
> last CPU that the task's state was loaded on, meaning that we can
> incorrectly fail to load the state from memory due to the checking in
> fpsimd_thread_switch().  When we change the in-memory state we need to
> also invalidate the last CPU information so that the state is corretly
> identified as needing to be reloaded from memory.
> 
> [...]

Applied SVE patch (with updated commit message) to arm64 (for-next/fixes),
thanks!

[1/2] arm64/sve: Flush foreign register state in sve_init_regs()
      https://git.kernel.org/arm64/c/751ecf6afd65

Cheers,
-- 
Will

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