cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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reserved-memory.yaml (2870B)

      1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
      2%YAML 1.2
      3---
      4$id: http://devicetree.org/schemas/reserved-memory/reserved-memory.yaml#
      5$schema: http://devicetree.org/meta-schemas/core.yaml#
      6
      7title: /reserved-memory Child Node Common Device Tree Bindings
      8
      9maintainers:
     10  - devicetree-spec@vger.kernel.org
     11
     12description: >
     13  Reserved memory is specified as a node under the /reserved-memory node. The
     14  operating system shall exclude reserved memory from normal usage one can
     15  create child nodes describing particular reserved (excluded from normal use)
     16  memory regions. Such memory regions are usually designed for the special
     17  usage by various device drivers.
     18
     19  Each child of the reserved-memory node specifies one or more regions
     20  of reserved memory. Each child node may either use a 'reg' property to
     21  specify a specific range of reserved memory, or a 'size' property with
     22  optional constraints to request a dynamically allocated block of
     23  memory.
     24
     25  Following the generic-names recommended practice, node names should
     26  reflect the purpose of the node (ie. "framebuffer" or "dma-pool").
     27  Unit address (@<address>) should be appended to the name if the node
     28  is a static allocation.
     29
     30properties:
     31  reg: true
     32
     33  size:
     34    $ref: /schemas/types.yaml#/definitions/uint32-array
     35    minItems: 1
     36    maxItems: 2
     37    description: >
     38      Length based on parent's \#size-cells. Size in bytes of memory to
     39      reserve.
     40
     41  alignment:
     42    $ref: /schemas/types.yaml#/definitions/uint32-array
     43    minItems: 1
     44    maxItems: 2
     45    description: >
     46      Length based on parent's \#size-cells. Address boundary for
     47      alignment of allocation.
     48
     49  alloc-ranges:
     50    $ref: /schemas/types.yaml#/definitions/uint32-array
     51    description: >
     52      Address and Length pairs. Specifies regions of memory that are
     53      acceptable to allocate from.
     54
     55  no-map:
     56    type: boolean
     57    description: >
     58      Indicates the operating system must not create a virtual mapping
     59      of the region as part of its standard mapping of system memory,
     60      nor permit speculative access to it under any circumstances other
     61      than under the control of the device driver using the region.
     62
     63  reusable:
     64    type: boolean
     65    description: >
     66      The operating system can use the memory in this region with the
     67      limitation that the device driver(s) owning the region need to be
     68      able to reclaim it back. Typically that means that the operating
     69      system can use that region to store volatile or cached data that
     70      can be otherwise regenerated or migrated elsewhere.
     71
     72allOf:
     73  - if:
     74      required:
     75        - no-map
     76
     77    then:
     78      not:
     79        required:
     80          - reusable
     81
     82  - if:
     83      required:
     84        - reusable
     85
     86    then:
     87      not:
     88        required:
     89          - no-map
     90
     91oneOf:
     92  - required:
     93      - reg
     94
     95  - required:
     96      - size
     97
     98additionalProperties: true
     99
    100...