Commit c194a386 authored by David Brazdil's avatar David Brazdil Committed by Greg Kroah-Hartman
Browse files

dt-bindings: reserved-memory: Open Profile for DICE 



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'.

'no-map' is required to ensure the memory region is never treated by
the kernel as system memory.

Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarDavid Brazdil <dbrazdil@google.com>
Link: https://lore.kernel.org/r/20220126231237.529308-2-dbrazdil@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ad10ab11

Documentation/devicetree/bindings/reserved-memory/google,open-dice.yaml

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# 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@google.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

  - no-map



unevaluatedProperties: false



examples:

  - |

    reserved-memory {

        #address-cells = <2>;

        #size-cells = <1>;



        dice: dice@12340000 {

            compatible = "google,open-dice";

            reg = <0x00 0x12340000 0x2000>;

            no-map;

        };

    };