linux-kernel - Re: [PATCH 0/2] Improve POE handling for uaccess

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Message-Id: <175164363953.1189181.15632215061604413984.b4-ty@kernel.org>
Date: Fri,  4 Jul 2025 18:44:14 +0100
From: Will Deacon <will@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	Kevin Brodsky <kevin.brodsky@....com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-kernel@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
	Joey Gouly <joey.gouly@....com>
Subject: Re: [PATCH 0/2] Improve POE handling for uaccess

On Thu, 19 Jun 2025 17:00:40 +0100, Kevin Brodsky wrote:
> This short series attempts to approach POE (Overlay) faults consistently
> w.r.t. uaccess. We currently assume that spurious Overlay faults are
> handled by retrying the access [1], but this isn't the case.
> 
> Patch 1 ensures that spurious Overlay faults are indeed ignored. This
> being done, it typically isn't worth using an ISB when writing to
> POR_EL0. Patch 2 removes the remaining ISB in the signal handling code.
> 
> [...]

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

[1/2] arm64: poe: Handle spurious Overlay faults
      https://git.kernel.org/arm64/c/22f3a4f60859

Cheers,
-- 
Will

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