linux-kernel - [PATCH v2 5/8] dt-bindings: misc: add property to support non-secure DSP

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Message-Id: <20211209120626.26373-6-srinivas.kandagatla@linaro.org>
Date:   Thu,  9 Dec 2021 12:06:23 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     robh+dt@...nel.org, gregkh@...uxfoundation.org
Cc:     devicetree@...r.kernel.org, ekangupt@....qualcomm.com,
        jeyr@...eaurora.org, bkumar@....qualcomm.com,
        linux-kernel@...r.kernel.org, bjorn.andersson@...aro.org,
        linux-arm-msm@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 5/8] 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>
---

This patch has dependency this yaml conversion patch:
https://lore.kernel.org/lkml/20211208101508.24582-1-david@ixit.cz/T/

 Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
index f42ab208a7fc..f0df0a3bf69f 100644
--- a/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
+++ b/Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml
@@ -29,6 +29,11 @@ properties:
         - sdsp
         - cdsp
 
+  qcom,non-secure-domain:
+    type: boolean
+    description: >
+      Property to specify that dsp domain is non-secure.
+
   '#address-cells':
     const: 1
 
-- 
2.21.0