lkml.org 
[lkml]   [2022]   [Aug]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/3] dt-bindings: reserved-memory: add linaro,secure-heap
+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
>

\
 
 \ /
  Last update: 2022-08-05 17:51    [W:1.563 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site