On Tue, 05 Jul 2022 15:06:52 +0200, Thierry Reding wrote: > From: Thierry Reding <treding@xxxxxxxxxx> > > This adds the "iommu-addresses" property to reserved-memory nodes, which > allow describing the interaction of memory regions with IOMMUs. Two use- > cases are supported: > > 1. Static mappings can be described by pairing the "iommu-addresses" > property with a "reg" property. This is mostly useful for adopting > firmware-allocated buffers via identity mappings. One common use- > case where this is required is if early firmware or bootloaders > have set up a bootsplash framebuffer that a display controller is > actively scanning out from during the operating system boot > process. > > 2. If an "iommu-addresses" property exists without a "reg" property, > the reserved-memory node describes an IOVA reservation. Such memory > regions are excluded from the IOVA space available to operating > system drivers and can be used for regions that must not be used to > map arbitrary buffers. > > Each mapping or reservation is tied to a specific device via a phandle > to the device's device tree node. This allows a reserved-memory region > to be reused across multiple devices. > > Signed-off-by: Thierry Reding <treding@xxxxxxxxxx> > --- > Changes in v7: > - keep reserved-memory.txt to avoid broken references > > Changes in v6: > - add device phandle to iommu-addresses property in examples > - remove now unused dt-bindings/reserved-memory.h header > --- > .../reserved-memory/reserved-memory.yaml | 62 +++++++++++++++++++ > 1 file changed, 62 insertions(+) > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check' on your patch (DT_CHECKER_FLAGS is new in v5.13): yamllint warnings/errors: dtschema/dtc warnings/errors: Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:22.7-45: Warning (reg_format): /reserved-memory/framebuffer@90000000:reg: property has invalid length (16 bytes) (#address-cells == 2, #size-cells == 1) Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:29.7-40: Warning (reg_format): /bus@0/adsp@2990000:reg: property has invalid length (16 bytes) (#address-cells == 2, #size-cells == 1) Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:34.7-42: Warning (reg_format): /bus@0/display@15200000:reg: property has invalid length (16 bytes) (#address-cells == 2, #size-cells == 1) Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:9.5-12: Warning (ranges_format): /reserved-memory:ranges: empty "ranges" property but its #size-cells (1) differs from / (2) Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:27.9-37.5: Warning (unit_address_vs_reg): /bus@0: node has a unit name, but no reg or ranges property Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (pci_device_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (simple_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:21.30-24.7: Warning (avoid_default_addr_size): /reserved-memory/framebuffer@90000000: Relying on default #address-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:21.30-24.7: Warning (avoid_default_addr_size): /reserved-memory/framebuffer@90000000: Relying on default #size-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:28.24-31.7: Warning (avoid_default_addr_size): /bus@0/adsp@2990000: Relying on default #address-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:28.24-31.7: Warning (avoid_default_addr_size): /bus@0/adsp@2990000: Relying on default #size-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:33.27-36.7: Warning (avoid_default_addr_size): /bus@0/display@15200000: Relying on default #address-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dts:33.27-36.7: Warning (avoid_default_addr_size): /bus@0/display@15200000: Relying on default #size-cells value Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: Warning (unique_unit_address_if_enabled): Failed prerequisite 'avoid_default_addr_size' /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: /: bus@0: 'anyOf' conditional failed, one must be fixed: 'reg' is a required property 'ranges' is a required property From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/root-node.yaml /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: /: 'compatible' is a required property From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/root-node.yaml /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/reserved-memory/reserved-memory.example.dtb: /: 'model' is a required property From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/root-node.yaml doc reference errors (make refcheckdocs): See https://patchwork.ozlabs.org/patch/ This check can fail if there are any dependencies. The base for a patch series is generally the most recent rc1. 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.
