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Mon, 28 Aug 2023 12:27:08 -0700 (PDT) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:8bd:7f16:d368:115f]) by smtp.gmail.com with ESMTPSA id i20-20020a5d5234000000b003141f96ed36sm11435319wra.0.2023.08.28.12.27.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 12:27:07 -0700 (PDT) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Arnd Bergmann , Alex Elder , Srini Kandagatla Cc: kernel@quicinc.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Bartosz Golaszewski Subject: [PATCH 05/11] dt-bindings: document the Qualcomm TEE Shared Memory Bridge Date: Mon, 28 Aug 2023 21:25:01 +0200 Message-Id: <20230828192507.117334-6-bartosz.golaszewski@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230828192507.117334-1-bartosz.golaszewski@linaro.org> References: <20230828192507.117334-1-bartosz.golaszewski@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230828_122713_380868_C9C252C9 X-CRM114-Status: GOOD ( 14.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add Device Tree bindings for Qualcomm TEE Shared Memory Brige - a mechanism that allows sharing memory buffers between trustzone and the kernel. Signed-off-by: Bartosz Golaszewski --- .../bindings/firmware/qcom,shm-bridge.yaml | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml diff --git a/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml b/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml new file mode 100644 index 000000000000..f660962b7b86 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/qcom,shm-bridge.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: QCOM Shared Memory Bridge + +description: | + Qualcomm TEE Shared Memory Bridge allows sharing limited areas of kernel's + virtual memory with the trustzone in order to avoid mapping the entire RAM. + +maintainers: + - Bjorn Andersson + - Konrad Dybcio + - Bartosz Golaszewski + +properties: + compatible: + items: + - enum: + - qcom,shm-bridge-sa8775p + - qcom,shm-bridge-sm8150 + - qcom,shm-bridge-sm8450 + - const: qcom,shm-bridge + +required: + - compatible + +additionalProperties: false + +examples: + - | + firmware { + compatible = "qcom,shm-bridge-sa8775p", "qcom,shm-bridge"; + };