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[178.235.179.206]) by smtp.gmail.com with ESMTPSA id lm11-20020a17090718cb00b00a1cf3fce937sm15772302ejc.162.2023.12.19.12.06.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Dec 2023 12:06:20 -0800 (PST) From: Konrad Dybcio Date: Tue, 19 Dec 2023 21:06:15 +0100 Subject: [PATCH] arm64: dts: qcom: sc8280xp: Describe the SMMUv3 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231219-topic-8280_smmuv3-v1-1-efeb32b2655b@linaro.org> X-B4-Tracking: v=1; b=H4sIALb3gWUC/x2NQQqEMAwAvyI5G7AVsfoVkaXWuAa0SrOKIP7ds McZGOYGocQk0GY3JDpZeIsKJs8gzD5+CXlUBlvY0ljT4G/bOaCzrvjIuh5niZUZXd1UfqopgHa DF8Ih+RhmLeOxLCr3RBNf/1HXP88LwZ85e3gAAAA= To: Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1703016378; l=1584; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=tbCr5cE54lb2i0xlMjLPkDs1oKBza31K8hbXR13Zg/s=; b=AXXSOLHDERsZeNBPsJxe64y+kBkHH6sCgNg8DlRp9avbu4tEtatNUpcwtIJlieBvmlOkwxD7L k9E7wuGFFCqC2vj4BoZUKD2MI1o4wsVn5KBFacZakk819AuzydUeLGL X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= SC8280XP actually has a third SMMU, which can be seen in e.g. the IORT ACPI table. Unfortunately though, the secure firmware seems to be configured in a way such that Linux can't touch it, not even read back the ID registers. Add it for hardware description completeness. Do note the reg space size is only an educated guess. Signed-off-by: Konrad Dybcio --- arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) --- base-commit: aa4db8324c4d0e67aa4670356df4e9fae14b4d37 change-id: 20231219-topic-8280_smmuv3-51d8795af7ec Best regards, diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi index febf28356ff8..391aa783251d 100644 --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi @@ -4078,6 +4078,22 @@ tlmm: pinctrl@f100000 { wakeup-parent = <&pdc>; }; + iommu@14f80000 { + compatible = "arm,smmu-v3"; + reg = <0 0x14f80000 0 0x80000>; + interrupts = , + , + ; + interrupt-names = "eventq", + "gerror", + "cmdq-sync"; + #iommu-cells = <1>; + dma-coherent; + + /* The secure firmware prevents register access from Linux */ + status = "reserved"; + }; + apps_smmu: iommu@15000000 { compatible = "qcom,sc8280xp-smmu-500", "arm,mmu-500"; reg = <0 0x15000000 0 0x100000>;