From: linlzhan <[email protected]> Document the device tree binding for the Qualcomm GVM crypto-virt node, which provides the wrapped-key buffer size needed by the QCOM_CRYPTO_VIRT driver to perform hardware-wrapped-key SCM operations backing virtio_blk's inline crypto layer.
The host does not report this size over virtio, so it is supplied via DT through the optional qcom,wrapped-key-size property. Signed-off-by: linlzhan <[email protected]> --- .../bindings/soc/qcom/qcom,crypto-virt.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,crypto-virt.yaml diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,crypto-virt.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,crypto-virt.yaml new file mode 100644 index 000000000000..5eb204f29762 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,crypto-virt.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/qcom/qcom,crypto-virt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: QCOM GVM Crypto Virt driver + +description: | + GVM-side hardware-wrapped-key SCM operations backing virtio_blk's inline + crypto layer. The host does not report a wrapped key size over virtio, so + it is provided here instead. + +maintainers: + - Linlin Zhang <[email protected]> + +properties: + compatible: + const: qcom,crypto-virt + + qcom,wrapped-key-size: + description: | + Size, in bytes, of the hardware-wrapped key generated/prepared/imported + via SCM calls. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 64 + maximum: 128 + +required: + - compatible + +additionalProperties: false + +examples: + - | + crypto_virt { + compatible = "qcom,crypto-virt"; + qcom,wrapped-key-size = <100>; + }; -- 2.34.1
