linux-kernel - Re: [PATCH v2] KVM: arm64: Remove stage 2 read fault check

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Message-Id: <175735577928.2363175.2398747869709964992.b4-ty@linux.dev>
Date: Mon,  8 Sep 2025 11:23:24 -0700
From: Oliver Upton <oliver.upton@...ux.dev>
To: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Wei-Lin Chang <r09922117@...e.ntu.edu.tw>
Cc: Oliver Upton <oliver.upton@...ux.dev>,
	Marc Zyngier <maz@...nel.org>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>
Subject: Re: [PATCH v2] KVM: arm64: Remove stage 2 read fault check

On Mon, 08 Sep 2025 14:48:06 +0800, Wei-Lin Chang wrote:
> In the non-NV case, read permission is always granted when mapping
> stage-2, so checking for it doesn't bring much. On the other hand,
> shadow stage-2 for NV guests could potentially have non-readable
> mappings when we align the permissions with those that L1 set for L2, we
> shouldn't be checking for read faults in this case either.
> 
> So just remove this check.
> 
> [...]

Applied to fixes, thanks!

[1/1] KVM: arm64: Remove stage 2 read fault check
      https://git.kernel.org/kvmarm/kvmarm/c/756491dd8329

--
Best,
Oliver