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charset="utf-8" In Agilex5, the TBU (Translation Buffer Unit) can now operate in non-secure mode, enabling Linux to utilize it through the IOMMU framework. This allows improved memory management capabilities in non-secure environments. With Agilex5 lifting this restriction, we are now extending the device tree bindings to support IOMMU for the Agilex5 SVC. Signed-off-by: Khairul Anuar Romli Reviewed-by: Krzysztof Kozlowski --- Changes in v5: - Use contains enum instead of const Changes in v4: - Fix syntax / style error. - Refactor code not to use AllOf but instead use if directly. Changes in v3: - Add iommu property. - Add logical check where only Agilex5 required iommus - Rewrite the commit message to explain why this changes is=20 needed. Changes in v2: - Reprase commit message to exclude iommu --- .../bindings/firmware/intel,stratix10-svc.yaml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/intel,stratix10-svc= .yaml b/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.yaml index fac1e955852e..a66aeed0ddee 100644 --- a/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.yaml +++ b/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.yaml @@ -34,6 +34,7 @@ properties: enum: - intel,stratix10-svc - intel,agilex-svc + - intel,agilex5-svc =20 method: description: | @@ -54,6 +55,9 @@ properties: reserved memory region for the service layer driver to communicate with the secure device manager. =20 + iommus: + maxItems: 1 + fpga-mgr: $ref: /schemas/fpga/intel,stratix10-soc-fpga-mgr.yaml description: Optional child node for fpga manager to perform fabric co= nfiguration. @@ -63,6 +67,16 @@ required: - method - memory-region =20 +if: + properties: + compatible: + contains: + enum: + - intel,agilex5-svc +then: + required: + - iommus + additionalProperties: false =20 examples: --=20 2.43.7 From nobody Fri Dec 19 10:55:56 2025 Received: from SN4PR2101CU001.outbound.protection.outlook.com (mail-southcentralusazon11012000.outbound.protection.outlook.com [40.93.195.0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0171323504B; 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charset="utf-8" Introduce the Stratix10 SoC Service Layer (SVC) node for Agilex5 SoCs. This node includes the compatible string "intel,agilex5-svc" and references a reserved memory region used for communication with the Secure Device Manager (SDM). Agilex5 introduces changes in how reserved memory is mapped and accessed compared to previous SoC generations, particularly with the addition of IOMMU support. Unlike earlier platforms, Agilex5 enables the use of the Translation Buffer Unit (TBU) in non-secure mode, allowing Linux to access it through the IOMMU framework. This commit updates the device tree structure to support Agilex5-specific handling of the SVC interface, including the necessary bindings for IOMMU integration. Signed-off-by: Khairul Anuar Romli --- Changes in v5: - No change. Changes in v4: - Exclude peers reviewers in the sign off. Changes in v3: - include iommu property in svc node. - Rephrase git commit message to describe iommu presence in Agilex5 Changes in v2: - Rephrase commit message to exclude mentioning iommu --- arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/bo= ot/dts/intel/socfpga_agilex5.dtsi index a13ccee3c4c3..15284092897e 100644 --- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi +++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi @@ -841,5 +841,14 @@ queue7 { }; }; }; + + firmware { + svc { + compatible =3D "intel,agilex5-svc"; + method =3D "smc"; + memory-region =3D <&service_reserved>; + iommus =3D <&smmu 10>; + }; + }; }; }; --=20 2.43.7