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From: Koba Ko <kobak@nvidia.com>
To: Breno Leitao <leitao@debian.org>
Cc: Will Deacon <will@kernel.org>,
	catalin.marinas@arm.com, robh@kernel.org, corbet@lwn.net,
	skhan@linuxfoundation.org, linux-arm-kernel@lists.infradead.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org, fenghuay@nvidia.com,
	tdave@nvidia.com, kaihengf@nvidia.com, rupakr@nvidia.com,
	mohammedk@nvidia.com
Subject: Re: [RFC PATCH v2 1/3] arm64: add CPU prefetch and cache modulation sysfs interface
Date: Thu, 15 Oct 2026 20:29:06 +0800	[thread overview]
Message-ID: <179206734688.387067.11244555739178101423@nvidia.com> (raw)
In-Reply-To: <as9HWuAhOGMfH1Ty@gmail.com>

Hi Breno,

Thanks for explaining the rebase, rollout and debugging costs of carrying
this out of tree. That's useful context from someone using the patchset.

CONFIG_EXPERT plus tainting on use could make experimental use more
explicit. Those safeguards alone would not establish that firmware
access, virtualization and runtime register updates are handled safely;
the local restrictions still need validation against the hardware and
firmware requirements.

I'd like to hear Will's view on whether this opt-in approach could be
acceptable in principle, and what requirements it would need to meet.
I'm not planning to submit v3.

Thanks,
Koba

  reply	other threads:[~2026-10-15 12:31 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-25 18:16 [RFC PATCH v2 0/3] arm64: expose CPU prefetch and cache modulation controls Koba Ko
2026-08-25 18:16 ` [RFC PATCH v2 1/3] arm64: add CPU prefetch and cache modulation sysfs interface Koba Ko
2026-09-29 13:29   ` Will Deacon
2026-10-14  6:17     ` Koba Ko
2026-10-14  9:17       ` Breno Leitao
2026-10-15 12:29         ` Koba Ko [this message]
2026-10-15 12:50           ` Will Deacon
2026-08-25 18:17 ` [RFC PATCH v2 2/3] Documentation/arch/arm64: document arm_cpumod Koba Ko
2026-08-25 18:17 ` [RFC PATCH v2 3/3] selftests: arm64: add arm_cpumod kselftest Koba Ko

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