linux-kernel - [PATCH v3 04/12] dt-bindings: misc: add property to support non-secure DSP

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Message-Id: <20220126135304.16340-5-srinivas.kandagatla@linaro.org>
Date:   Wed, 26 Jan 2022 13:52:56 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     robh+dt@...nel.org, gregkh@...uxfoundation.org
Cc:     devicetree@...r.kernel.org, ekangupt@....qualcomm.com,
        bkumar@....qualcomm.com, linux-kernel@...r.kernel.org,
        srini@...nel.org, bjorn.andersson@...aro.org,
        linux-arm-msm@...r.kernel.org, Jeya R <jeyr@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v3 04/12] dt-bindings: misc: add property to support non-secure DSP

From: Jeya R <jeyr@...eaurora.org>

Add property to set DSP domain as non-secure.

ADSP/MDSP/SDSP are by default secured, where as CDSP can be either be
secured/unsecured.
non-secured Compute DSP would allow users to load unsigned process
and run hexagon instructions, but limiting access to secured hardware
within the DSP.

Based on this flag device nodes for secured and unsecured are created.

Signed-off-by: Jeya R <jeyr@...eaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 Documentation/devicetree/bindings/misc/qcom,fastrpc.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
index 2a1827ab50d2..f9a01e2b4c96 100644
--- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
+++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.txt
@@ -17,6 +17,11 @@ other tasks.
 	Definition: should specify the dsp domain name this fastrpc
 	corresponds to. must be one of this: "adsp", "mdsp", "sdsp", "cdsp"
 
+- qcom,non-secure-domain:
+	Usage: required
+	Value type: <boolean>
+	Definition: Property to specify that dsp domain is non-secure.
+
 - #address-cells
 	Usage: required
 	Value type: <u32>
-- 
2.21.0