linux-kernel - Re: [PATCH v2] arm64/sme: Move storage of reg_smidr to __cpuinfo_store

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Message-ID: <7bd307fb-9add-41a8-975a-a0ecfec1a933@sirena.org.uk>
Date: Tue, 17 Dec 2024 14:16:58 +0000
From: Mark Brown <broonie@...nel.org>
To: Marc Zyngier <maz@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Peter Collingbourne <pcc@...gle.com>,
	Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH v2] arm64/sme: Move storage of reg_smidr to
 __cpuinfo_store_cpu()

On Tue, Dec 17, 2024 at 08:27:07AM +0000, Marc Zyngier wrote:

> My reading of the thread was that we don't need to kill the
> arm64.nosme option as SMIDR_EL1 wouldn't UNDEF, which is guaranteed if
> SME is implemented at all.

My read had been the other way around, I'll drop the change to the
override.

> What was needed in 6.0 is not there anymore, for all the reasons that
> Mark outlined and that you have pasted in the above commit message.

That's a rewrite of roughly the same stuff!  I pasted the commit IDs but
the rest was a rewrite.

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