DMABUF Reserved memory definition for OP-TEE SDP feaure. Signed-off-by: Olivier Masse <olivier.masse@xxxxxxx> --- .../reserved-memory/linaro,secure-heap.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/linaro,secure-heap.yaml diff --git a/Documentation/devicetree/bindings/reserved-memory/linaro,secure-heap.yaml b/Documentation/devicetree/bindings/reserved-memory/linaro,secure-heap.yaml new file mode 100644 index 000000000000..80522a4e2989 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/linaro,secure-heap.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/reserved-memory/linaro,secure-heap.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Linaro Secure DMABUF Heap + +maintainers: + - Olivier Masse <olivier.masse@xxxxxxx> + +description: + Linaro OP-TEE firmware needs a reserved memory for the + Secure Data Path feature (aka SDP). + The purpose is to provide a secure memory heap which allow + non-secure OS to allocate/free secure buffers. + The TEE is reponsible for protecting the SDP memory buffers. + TEE Trusted Application can access secure memory references + provided as parameters (DMABUF file descriptor). + +allOf: + - $ref: "reserved-memory.yaml" + +properties: + compatible: + const: linaro,secure-heap + + reg: + description: + Region of memory reserved for OP-TEE SDP feature + + no-map: + $ref: /schemas/types.yaml#/definitions/flag + description: + Avoid creating a virtual mapping of the region as part of the OS' + standard mapping of system memory. + +unevaluatedProperties: false + +required: + - compatible + - reg + - no-map + +examples: + - | + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + + sdp@3e800000 { + compatible = "linaro,secure-heap"; + no-map; + reg = <0 0x3E800000 0 0x00400000>; + }; + }; -- 2.25.0
