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Subject[PATCH 4/5] dt-bindings: reserved-memory: add linaro,secure-heap
Date
DMABUF Reserved memory definition for OP-TEE SDP feaure.

Signed-off-by: Olivier Masse <olivier.masse@nxp.com>
---
.../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@nxp.com>
+
+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
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