linux-kernel - Re: [PATCH v2] arm64: fix cleared E0POE bit after cpu

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Message-ID: <176798145230.2606771.17247725038196582505.b4-ty@arm.com>
Date: Fri, 9 Jan 2026 18:00:52 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Yeoreum Yun <yeoreum.yun@....com>
Cc: rafael@...nel.org, pavel@...nel.org, will@...nel.org,
	anshuman.khandual@....com, ryan.roberts@....com,
	yang@...amperecomputing.com, joey.gouly@....com,
	kevin.brodsky@....com, stable@...r.kernel.org
Subject: Re: [PATCH v2] arm64: fix cleared E0POE bit after
 cpu_suspend()/resume()

On Wed, 07 Jan 2026 16:21:15 +0000, Yeoreum Yun wrote:
> TCR2_ELx.E0POE is set during smp_init().
> However, this bit is not reprogrammed when the CPU enters suspension and
> later resumes via cpu_resume(), as __cpu_setup() does not re-enable E0POE
> and there is no save/restore logic for the TCR2_ELx system register.
> 
> As a result, the E0POE feature no longer works after cpu_resume().
> 
> [...]

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

[1/1] arm64: fix cleared E0POE bit after cpu_suspend()/resume()
      https://git.kernel.org/arm64/c/bdf3f4176092

-- 
Catalin