From: "Rob Herring (Arm)" <robh@kernel.org>
To: Peter Griffin <peter.griffin@linaro.org>
Cc: "Joerg Roedel (AMD)" <joro@8bytes.org>,
Pranjal Shrivastava <praan@google.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
Robin Murphy <robin.murphy@arm.com>,
Mostafa Saleh <smostafa@google.com>,
Daniel Mentz <danielmentz@google.com>,
linux-kernel@vger.kernel.org, willmcvicker@google.com,
tudor.ambarus@linaro.org, Conor Dooley <conor+dt@kernel.org>,
iommu@lists.linux.dev, kernel-team@android.com,
andre.draszik@linaro.org,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Will Deacon <will@kernel.org>,
jyescas@google.com
Subject: Re: [PATCH v2 1/2] dt-bindings: iommu: arm,smmu-v3: Add arm,instdata-override property
Date: Thu, 24 Sep 2026 09:41:49 -0500 [thread overview]
Message-ID: <179026090862.4166237.2751536786551835786.robh@kernel.org> (raw)
In-Reply-To: <20260911-arm-smmu-v3-instcfg-override-v2-1-5804e4f400b5@linaro.org>
On Fri, 11 Sep 2026 21:21:05 +0000, Peter Griffin wrote:
> arm,instdata-override DT property is intended to be used for SMMUs that
> have a silicon integration issue with the AxPROT[2] signal always being 1
> making all transactions appear as instructions.
>
> Google Tensor G5 (Laguna) is an example of an SoC with this silicon
> erratum. The DT property can be specified to enable a software
> workaround which overrides the incoming attribute to data.
>
> Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
> ---
> ---
> Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
next prev parent reply other threads:[~2026-09-24 14:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-11 21:21 [PATCH v2 0/2] Add arm-smmu-v3 support for Laguna SMMU silicon erratum workaround Peter Griffin
2026-09-11 21:21 ` [PATCH v2 1/2] dt-bindings: iommu: arm,smmu-v3: Add arm,instdata-override property Peter Griffin
2026-09-24 14:41 ` Rob Herring (Arm) [this message]
2026-09-11 21:21 ` [PATCH v2 2/2] iommu/arm-smmu-v3: Add support for arm,instdata-override DT property Peter Griffin
2026-09-24 23:06 ` Jason Gunthorpe
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