linux-kernel - Re: [PATCH v2 41/45] arm

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Message-ID: <20260106151415.00002119@huawei.com>
Date: Tue, 6 Jan 2026 15:14:15 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Ben Horgan <ben.horgan@....com>
CC: <amitsinght@...vell.com>, <baisheng.gao@...soc.com>,
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Subject: Re: [PATCH v2 41/45] arm_mpam: Add quirk framework

On Fri, 19 Dec 2025 18:11:43 +0000
Ben Horgan <ben.horgan@....com> wrote:

> From: Shanker Donthineni <sdonthineni@...dia.com>
> 
> The MPAM specification includes the MPAMF_IIDR, which serves to uniquely
> identify the MSC implementation through a combination of implementer
> details, product ID, variant, and revision. Certain hardware issues/errata
> can be resolved using software workarounds.
> 
> Introduce a quirk framework to allow workarounds to be enabled based on the
> MPAMF_IIDR value.
> 
> [ morse: Stash the IIDR so this doesn't need an IPI, enable quirks only
> once, move the description to the callback so it can be pr_once()d, add an
> enum of workarounds for popular errata. Add macros for making lists of
> product/revision/vendor half readable ]

Review comment that got left over? 

Otherwise looks fairly standard for quirk handling.
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>

> 
> Signed-off-by: Shanker Donthineni <sdonthineni@...dia.com>
> Signed-off-by: James Morse <james.morse@....com>
> Signed-off-by: Ben Horgan <ben.horgan@....com>