linux-kernel - Re: [PATCH v5 1/2] dt-bindings: reserved-memory: Open Profile for DICE

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Message-ID: <YcN9Tl5BOJ4fMLTw@robh.at.kernel.org>
Date:   Wed, 22 Dec 2021 15:32:30 -0400
From:   Rob Herring <robh@...nel.org>
To:     David Brazdil <dbrazdil@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Frank Rowand <frowand.list@...il.com>,
        Will Deacon <will@...nel.org>,
        Andrew Scull <ascull@...gle.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/2] dt-bindings: reserved-memory: Open Profile for
 DICE

On Tue, Dec 21, 2021 at 05:45:01PM +0000, David Brazdil wrote:
> 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 compatible with 'google,open-dice'.
> 
> Signed-off-by: David Brazdil <dbrazdil@...gle.com>
> ---
>  .../reserved-memory/google,open-dice.yaml     | 45 +++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reserved-memory/google,open-dice.yaml
> 
> diff --git a/Documentation/devicetree/bindings/reserved-memory/google,open-dice.yaml b/Documentation/devicetree/bindings/reserved-memory/google,open-dice.yaml
> new file mode 100644
> index 000000000000..7bc714e9715f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reserved-memory/google,open-dice.yaml
> @@ -0,0 +1,45 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reserved-memory/google,open-dice.yaml#
> +$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@...gle.com>
> +
> +allOf:
> +  - $ref: "reserved-memory.yaml"
> +
> +properties:
> +  compatible:
> +    const: google,open-dice
> +
> +  reg:
> +    description: page-aligned region of memory containing DICE data
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: true

unevaluatedProperties: false

Additional properties are only allowed for common schema included by 
other schemas.

> +
> +examples:
> +  - |
> +    reserved-memory {
> +        #address-cells = <2>;
> +        #size-cells = <1>;
> +
> +        dice: dice@...40000 {
> +            compatible = "google,open-dice";
> +            reg = <0x00 0x12340000 0x2000>;
> +            no-map;
> +        };
> +    };
> -- 
> 2.34.1.307.g9b7440fafd-goog
> 
>