Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Olivier Masse <olivier.masse@nxp.com>
To:     sumit.semwal@linaro.org, benjamin.gaignard@collabora.com,
        Brian.Starkey@arm.com, christian.koenig@amd.com,
        linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org
Cc:     clement.faure@nxp.com, olivier.masse@nxp.com
Subject: [PATCH 4/5] dt-bindings: reserved-memory: add linaro,secure-heap
Date:   Tue,  2 Aug 2022 11:58:42 +0200
Message-Id: <20220802095843.14614-5-olivier.masse@nxp.com>
In-Reply-To: <20220802095843.14614-1-olivier.masse@nxp.com>
References: <20220802095843.14614-1-olivier.masse@nxp.com>
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?LXxq85t2tpLuzH0dSrDUBcqA3pujmVT7+8H7G1RxgqzcUSWuy0axs3fyv3RM?=
 =?us-ascii?Q?0CAO5OqnY8nrZ2QbR30Sz/BCWbzytSkWkz4YHmxnxldlkGdF6pIW/OfKf0wW?=
 =?us-ascii?Q?dO0Ezh9YJUF4eUWU/dSH/1Sno97JKY0MnRBKnHhcUewBoIMCfKfntdk/i7t8?=
 =?us-ascii?Q?s5lgkljP+rBSv7geCcBtKktYg080ddOpj4d8RAcJ/33/4rBXX45n515ZUlqW?=
 =?us-ascii?Q?DNsatjlarQG3l+lv+Pw7LGuaurE2sgsz3M2THRnRn/mu72yLF2gRNoibQI63?=
 =?us-ascii?Q?kggg5A3mfgoDJUrA0hnoNlb8fLZike0+/ksQAD9JGyg5JTxKeFsymQ3m2MBu?=
 =?us-ascii?Q?cYanqFti248mLYs4bihDdNEtNzjpiSBN0X5UCk5HE3mdbrgIcp10q6zWic/c?=
 =?us-ascii?Q?4K5fNCu7BGJX2bmUztxCxZ1I/OCXrUKZL4+FFJJS5hlI/nXUn3zO1R7oRHcu?=
 =?us-ascii?Q?CDVAXbNfzdrOJ0sK9T11MArjuxQyp2RjRIAfJP+Ojeqe7mq2ahxvl71/GgrJ?=
 =?us-ascii?Q?46tJiKetbxdu6hmy0bfV47TFJ2ICLSF/0dy8RJykWZov/MAiiOjEbbWJuxYM?=
 =?us-ascii?Q?D/raICBbYU3ai4u0EsdMjkbBorpQbYkMbxfKk3qA8vnAllW5dl2/ChzYNTOR?=
 =?us-ascii?Q?EcOjkHjhIwHFtDWs8XyK0+b6+X/7jokdRGC/+pI+lWJK8f5A88qVyrK4djYu?=
 =?us-ascii?Q?XB78W9YtCQGMfN+aV9gehgVD+w0pLjbSncTFg8KVPZTWn09kTYuycQh6L91X?=
 =?us-ascii?Q?agxIWB08X2n/ZmP0IqNRXgZX0GapSpSeBSKJvsUAYUypdzDItQsRf7eCaPoz?=
 =?us-ascii?Q?ByYu2OTUcMwQ+jO3E8+z1uqZbJ3eWWlgJptjOTY16/ygRUSv0mMnqUwC63ih?=
 =?us-ascii?Q?yiBX9hkuK4vfme+CVvbiQfvmhN2KaaUKMgmmSCjWg8fjttURakup+OpQkizC?=
 =?us-ascii?Q?mOAOajmrWmiWJmWo+9G85Rv9VT8f/lIcPTgERvscXU1JZrKIJYLgvbzDBc5D?=
 =?us-ascii?Q?/hnVvAFi33a7LEpmKNVGYh91iWYk+Knptv7gCP8j2G1e7QetnMXq9DvpNQhJ?=
 =?us-ascii?Q?hdoNe78PxFZNsdUPHWSOLFgnK2vKWx40oBvqjqWYOFBJsMAVYBJeTENii7zL?=
 =?us-ascii?Q?KASLl24h6F3s3d3OGUXFMgl+wjcm0T2ZE0+DHJ/V0WEytCNHw9uncH8Mp+8x?=
 =?us-ascii?Q?em28kZwwGClo4kGsT4E+JWKDlOM+DC2DUMZ0Hcsc91IcL2uQf6V1rmsCEhvJ?=
 =?us-ascii?Q?dWV7Nx2lXqZcSxtmQbXF1jkHQOF9d8349XnAi6qH0wWEE9IQcIiIG1me4GBL?=
 =?us-ascii?Q?zLPHfovEL4qYa/n+vWPjxKCGc1k64yNWW1U++gRhDfncbrP0I62YouRc9Eld?=
 =?us-ascii?Q?sY3Lk7JpuFGEIDulS4Qx15jIRUKG5tdwgYgX3g/9LVhD6WVCPvYwZBo0VJFG?=
 =?us-ascii?Q?B87pWZi8rl/BBQkIJNzm7OjvrIh7yDturgPysP5VEBhhbA6k/ZKasX/7qzp8?=
 =?us-ascii?Q?zIJPHpTxiHypI4IG+AK9HiNlmMbZmrfIwIuaX5SueXRjLRdCTE1IOXdlpRSm?=
 =?us-ascii?Q?1YvfxOjvE+v1wzn7qN1XWOWFYM1uZNDz+SunhFnt?=
X-OriginatorOrg: nxp.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 75cdf14a-ff6b-4faf-5a09-08da746d9b6f
X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB6737.eurprd04.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Aug 2022 09:58:53.6244
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: aqEHAmRMpZxJXpI403FoUa7gn8OjolFDzYfuLopI1dJqRc5Lxzwx2jjO0mFHe4aNSRkIs7GXsA6Nn9P07WndIQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB8341
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,
        RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham
        autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

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