[PATCH v2 3/3] dt-bindings: sifive: Add WorldGuard Checker

[Rob Herring (Arm)]

On Thu, 30 Jul 2026 00:39:08 +0800, Yu-Chien Peter Lin wrote:
> Add YAML binding schema for the SiFive wgChecker, a programmable
> access controller integrated in the interconnect fabric of RISC-V
> Worlds-capable SoCs.
> 
> wgChecker enforces World ID (WID) based access control on downstream
> bus transactions. Each checker slot encodes a 2-bit permission field
> per WID (read/write), enabling fine-grained memory partitioning and
> device isolation between execution contexts. Violations are reported
> via bus errors, interrupts, or both, selectable and lockable per slot.
> 
> The binding registers wgChecker as an access-controllers provider.
> Consumers (i.e. its protected device) reference it via the standard
> access-controllers phandle to declare their access requirements.
> 
> Also document the sifive,trustedwid property for the /cpus node,
> identifying the privileged WID authorized to configure all checkers
> on the platform.
> 
> Link: https://github.com/riscvarchive/security/blob/main/papers/worldguard%20proposal.pdf
> Signed-off-by: Yu-Chien Peter Lin <peter.lin at sifive.com>
> Reviewed-by: Zong Li <zong.li at sifive.com>
> Reviewed-by: Jim Shu <jim.shu at sifive.com>
> ---
>  .../devicetree/bindings/riscv/worlds.yaml     |   9 +
>  .../bindings/sifive/sifive,wgchecker2.yaml    | 356 ++++++++++++++++++
>  2 files changed, 365 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sifive/sifive,wgchecker2.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/sifive/sifive,wgchecker2.example.dtb: uart at 1c1000 (ns16550a): $nodename:0: 'uart at 1c1000' does not match '^serial(@.*)?$'
	from schema $id: http://devicetree.org/schemas/serial/8250.yaml
Documentation/devicetree/bindings/sifive/sifive,wgchecker2.example.dtb: uart at 1c1000 (ns16550a): Unevaluated properties are not allowed ('access-controllers', 'reg-names' were unexpected)
	from schema $id: http://devicetree.org/schemas/serial/8250.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260729163908.249838-4-peter.lin@sifive.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.