Add DeviceTree bindings for Open Profile for DICE, an open protocol for measured boot. Firmware uses DICE to measure the hardware/software combination and generates Compound Device Identifier (CDI) certificates. These are stored in memory and the buffer is described in the DT as a reserved memory region referenced by a compatible device node. Signed-off-by: David Brazdil <dbrazdil@xxxxxxxxxx> --- .../bindings/firmware/google,open-dice.yaml | 51 +++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/google,open-dice.yaml diff --git a/Documentation/devicetree/bindings/firmware/google,open-dice.yaml b/Documentation/devicetree/bindings/firmware/google,open-dice.yaml new file mode 100644 index 000000000000..1aa69f381b8c --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/google,open-dice.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/google,open-dice.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Open Profile for DICE Device Tree Bindings + +description: | + This binding represents a reserved memory region containing data + generated by the Open Profile for DICE protocol. + + See https://pigweed.googlesource.com/open-dice/ + +maintainers: + - David Brazdil <dbrazdil@xxxxxxxxxx> + +properties: + compatible: + enum: + - google,open-dice + + memory-region: + maxItems: 1 + description: | + phandle to the reserved memory node to be associated with the device + The reserved memory node should be defined as per the bindings, + Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml + +required: + - compatible + - memory-region + +additionalProperties: false + +examples: + - | + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + + dice_reserved: dice@12340000 { + reg = <0x00 0x12340000 0x2000>; + no-map; + }; + }; + + dice { + compatible = "google,open-dice"; + memory-region = <&dice_reserved>; + }; -- 2.34.1.173.g76aa8bc2d0-goog
