+Rob and devicetree list.
I don't know if this should be "linaro" or something more generic, and also where previous discussions got to about DMA heaps in DT.
Cheers, -Brian
On Fri, Aug 05, 2022 at 03:53:29PM +0200, Olivier Masse wrote:
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