linux-kernel - [PATCH V2 02/11] dt-bindings: remoteproc: qcom,msm8996-mss-pil: Update memory region

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Date:   Mon, 9 Jan 2023 09:18:34 +0530
From:   Sibi Sankar <quic_sibis@...cinc.com>
To:     <andersson@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <robh+dt@...nel.org>, <manivannan.sadhasivam@...aro.org>,
        <robin.murphy@....com>
CC:     <agross@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <konrad.dybcio@...ainline.org>, <amit.pundir@...aro.org>,
        <regressions@...mhuis.info>, <sumit.semwal@...aro.org>,
        <will@...nel.org>, <catalin.marinas@....com>,
        Sibi Sankar <quic_sibis@...cinc.com>
Subject: [PATCH V2 02/11] dt-bindings: remoteproc: qcom,msm8996-mss-pil: Update memory region

The dynamic memory region used for metadata authentication would still
be a part of the kernel mapping and any access to this region  by the
application processor after assigning it to the remote Q6 will result
in a XPU violation. This is fixed by using a no-map carveout instead.
Update the bindings to reflect the addition of the new modem metadata
carveout on MSM8996 (and similar) SoCs.

Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
---
 .../bindings/remoteproc/qcom,msm8996-mss-pil.yaml  | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml
index d3d3fb2fe91d..ad1a51c23949 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml
@@ -123,6 +123,7 @@ properties:
     items:
       - description: MBA reserved region
       - description: Modem reserved region
+      - description: Metadata reserved region
 
   firmware-name:
     $ref: /schemas/types.yaml#/definitions/string-array
@@ -165,6 +166,16 @@ properties:
       - memory-region
     deprecated: true
 
+  metadata:
+    type: object
+    description:
+      Metadata reserved region
+    properties:
+      memory-region: true
+    required:
+      - memory-region
+    deprecated: true
+
 required:
   - compatible
   - reg
@@ -306,6 +317,7 @@ allOf:
       - required:
           - mba
           - mpss
+          - metadata
 
 additionalProperties: false
 
@@ -348,7 +360,7 @@ examples:
                         <&rpmhpd SDM845_MSS>;
         power-domain-names = "cx", "mx", "mss";
 
-        memory-region = <&mba_mem>, <&mpss_mem>;
+        memory-region = <&mba_mem>, <&mpss_mem>, <&mdata_mem>;
 
         resets = <&aoss_reset AOSS_CC_MSS_RESTART>,
                  <&pdc_reset PDC_MODEM_SYNC_RESET>;
-- 
2.17.1