linux-kernel - Re: [PATCH] irqchip/gic-v3: Add Allwinner sunxi001 erratum workaround

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Message-ID: <86o78jlms2.wl-maz@kernel.org>
Date: Sun, 02 Jun 2024 10:25:01 +0100
From: Marc Zyngier <maz@...nel.org>
To: "harry.yu185" <harry.yu185@...il.com>
Cc: corbet@....net,
	catalin.marinas@....com,
	will@...nel.org,
	tglx@...utronix.de,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] irqchip/gic-v3: Add Allwinner sunxi001 erratum workaround

On Sun, 02 Jun 2024 08:10:58 +0100,
"harry.yu185" <harry.yu185@...il.com> wrote:
> 
> Allwinner A523 GIC600 integration does not support the
> sharability feature. So assigned Erratum ID #sunxi001 for this
> issue.
> 
> That the 0x0201643b ID is not Allwinner specific and thus
> there is an extra of_machine_is_compatible() check.
> 
> Note, because more than one soc may have this problem, the 'sunxi'
> name is used instead of a fixed soc name like A523.
> 
> Signed-off-by: harry.yu185 <harry.yu185@...il.com>

No, this is all already handled by the driver already (since 6.6).

Please fix your DT to include the "dma-noncoherent" property in the
GIC and ITS nodes, which should paper over the integration bug.

Thanks,

	M.

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