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From: Marc Zyngier <maz@kernel.org>
To: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
	Catalin Marinas <catalin.marinas@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Joey Gouly <joey.gouly@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oupton@kernel.org>,
	Zenghui Yu <yuzenghui@huawei.com>
Subject: Re: [PATCH 2/3] arm64: Unconditionally enable PAN support
Date: Thu, 22 Jan 2026 11:21:01 +0000	[thread overview]
Message-ID: <86sebxc2qq.wl-maz@kernel.org> (raw)
In-Reply-To: <20260107180701.2858276-3-maz@kernel.org>

Hi Will,

On Wed, 07 Jan 2026 18:07:00 +0000,
Marc Zyngier <maz@kernel.org> wrote:
> 
> FEAT_PAN has been around since ARMv8.1 (over 11 years ago), has no compiler
> dependency (we have our own accessors), and is a great security benefit.
> 
> Drop CONFIG_ARM64_PAN, and make the support unconditionnal.

Since you mentioned that you were planning to merge this patch, I'd
like to point out that a related change[1] is on its way to Linus via
the KVM tree for 6.19. It is also in -next due to dependencies.

Could you please place these patches on a branch that I can pull in
the kvmarm tree to resolve the conflict? It really amounts to
reverting this patch now that we are guaranteed to have PAN on an
PAN- machine.

Thanks,

	M.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git/commit/?h=fixes&id=86364832ba6f2777db98391060b2d7f69938ad9b

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


  reply	other threads:[~2026-01-22 11:21 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-07 18:06 [PATCH 0/3] arm64: Unconditionally compile LSE/PAN/EPAN support Marc Zyngier
2026-01-07 18:06 ` [PATCH 1/3] arm64: Unconditionally enable LSE support Marc Zyngier
2026-01-07 18:07 ` [PATCH 2/3] arm64: Unconditionally enable PAN support Marc Zyngier
2026-01-22 11:21   ` Marc Zyngier [this message]
2026-01-22 17:02     ` Will Deacon
2026-01-07 18:07 ` [PATCH 3/3] arm64: Unconditionally enable EPAN support Marc Zyngier
2026-01-22 10:15   ` Will Deacon
2026-01-22 11:06     ` Marc Zyngier
2026-01-22 16:59 ` [PATCH 0/3] arm64: Unconditionally compile LSE/PAN/EPAN support Will Deacon

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