linux-kernel - Re: [PATCH AUTOSEL 5.18 15/49] arm64: Expand ESR_ELx_WFx_ISS

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Message-ID: <877d605rrw.wl-maz@kernel.org>
Date:   Wed, 01 Jun 2022 16:26:27 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Joey Gouly <joey.gouly@....com>,
        Catalin Marinas <catalin.marinas@....com>, will@...nel.org,
        broonie@...nel.org, alexandru.elisei@....com, mark.rutland@....com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH AUTOSEL 5.18 15/49] arm64: Expand ESR_ELx_WFx_ISS_TI to match its ARMv8.7 definition

On Wed, 01 Jun 2022 14:51:39 +0100,
Sasha Levin <sashal@...nel.org> wrote:
> 
> From: Marc Zyngier <maz@...nel.org>
> 
> [ Upstream commit 6a437208cb942a2dd98f7e1c3fd347ed3d425ffc ]
> 
> Starting with FEAT_WFXT in ARMv8.7, the TI field in the ISS
> that is reported on a WFx trap is expanded by one bit to
> allow the description of WFET and WFIT.
> 
> Special care is taken to exclude the WFxT bit from the mask
> used to match WFI so that it also matches WFIT when trapped from
> EL0.
> 
> Reviewed-by: Joey Gouly <joey.gouly@....com>
> Signed-off-by: Marc Zyngier <maz@...nel.org>
> Acked-by: Catalin Marinas <catalin.marinas@....com>
> Link: https://lore.kernel.org/r/20220419182755.601427-2-maz@kernel.org
> Signed-off-by: Sasha Levin <sashal@...nel.org>

Please do not backport this patch. It achieves nothing on its own, and
the kernel isn't broken without it.

Also, please do not AUTOSEL KVM/arm64 patches that are not tagged with
a Cc stable.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.