[PATCH V3 02/10] dt-bindings: remoteproc: qcom,msm8996-mss-pil: Update memory region

Sibi Sankar
2023-01-11T11:46:01Z

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@quicinc.com>
---

v3:
* add blank lines and additionalProperties: false to
mdata objects [Krzysztof]

.../remoteproc/qcom,msm8996-mss-pil.yaml | 18 +++++++++++++++++-
1 file changed, 17 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 1aa5e5c7c2bd..c1ac6ca1e759 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml
@@ -122,6 +122,7 @@ properties:
items:
- description: MBA reserved region
- description: Modem reserved region
+ - description: Metadata reserved region

firmware-name:
$ref: /schemas/types.yaml#/definitions/string-array
@@ -172,6 +173,20 @@ properties:
additionalProperties: false
deprecated: true

+ metadata:
+ type: object
+ description:
+ Metadata reserved region
+
+ properties:
+ memory-region: true
+
+ required:
+ - memory-region
+
+ additionalProperties: false
+ deprecated: true
+
required:
- compatible
- reg
@@ -313,6 +328,7 @@ allOf:
- required:
- mba
- mpss
+ - metadata

additionalProperties: false

@@ -355,7 +371,7 @@ 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