| Message ID | 20221219225850.2397345-3-quic_eberman@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Drivers for gunyah hypervisor | expand |
On 12/19/22 4:58 PM, Elliot Berman wrote: > When Linux is booted as a guest under the Gunyah hypervisor, the Gunyah > Resource Manager applies a devicetree overlay describing the virtual > platform configuration of the guest VM, such as the message queue > capability IDs for communicating with the Resource Manager. This > information is not otherwise discoverable by a VM: the Gunyah hypervisor > core does not provide a direct interface to discover capability IDs nor > a way to communicate with RM without having already known the > corresponding message queue capability ID. Add the DT bindings that > Gunyah adheres for the hypervisor node and message queues. > > Reviewed-by: Rob Herring <robh@kernel.org> > Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> At this point I have no input on this patch; if Rob's happy with the bindings, that's good enough for me. -Alex > --- > .../bindings/firmware/gunyah-hypervisor.yaml | 82 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 83 insertions(+) > create mode 100644 Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml > > diff --git a/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml b/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml > new file mode 100644 > index 000000000000..9fd1d254b156 > --- /dev/null > +++ b/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml > @@ -0,0 +1,82 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/firmware/gunyah-hypervisor.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Gunyah Hypervisor > + > +maintainers: > + - Murali Nalajala <quic_mnalajal@quicinc.com> > + - Elliot Berman <quic_eberman@quicinc.com> > + > +description: |+ > + Gunyah virtual machines use this information to determine the capability IDs > + of the message queues used to communicate with the Gunyah Resource Manager. > + See also: https://github.com/quic/gunyah-resource-manager/blob/develop/src/vm_creation/dto_construct.c > + > +properties: > + compatible: > + const: gunyah-hypervisor > + > + "#address-cells": > + description: Number of cells needed to represent 64-bit capability IDs. > + const: 2 > + > + "#size-cells": > + description: must be 0, because capability IDs are not memory address > + ranges and do not have a size. > + const: 0 > + > +patternProperties: > + "^gunyah-resource-mgr(@.*)?": > + type: object > + description: > + Resource Manager node which is required to communicate to Resource > + Manager VM using Gunyah Message Queues. > + > + properties: > + compatible: > + const: gunyah-resource-manager > + > + reg: > + items: > + - description: Gunyah capability ID of the TX message queue > + - description: Gunyah capability ID of the RX message queue > + > + interrupts: > + items: > + - description: Interrupt for the TX message queue > + - description: Interrupt for the RX message queue > + > + additionalProperties: false > + > + required: > + - compatible > + - reg > + - interrupts > + > +additionalProperties: false > + > +required: > + - compatible > + - "#address-cells" > + - "#size-cells" > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + > + hypervisor { > + #address-cells = <2>; > + #size-cells = <0>; > + compatible = "gunyah-hypervisor"; > + > + gunyah-resource-mgr@0 { > + compatible = "gunyah-resource-manager"; > + interrupts = <GIC_SPI 3 IRQ_TYPE_EDGE_RISING>, /* TX full IRQ */ > + <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; /* RX empty IRQ */ > + reg = <0x00000000 0x00000000>, <0x00000000 0x00000001>; > + /* TX, RX cap ids */ > + }; > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index 1dd8f58d6e01..f32320a9efa4 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -8939,6 +8939,7 @@ M: Elliot Berman <quic_eberman@quicinc.com> > M: Murali Nalajala <quic_mnalajal@quicinc.com> > L: linux-arm-msm@vger.kernel.org > S: Supported > +F: Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml > F: Documentation/virt/gunyah/ > > HABANALABS PCI DRIVER
diff --git a/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml b/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml new file mode 100644 index 000000000000..9fd1d254b156 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml @@ -0,0 +1,82 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/gunyah-hypervisor.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Gunyah Hypervisor + +maintainers: + - Murali Nalajala <quic_mnalajal@quicinc.com> + - Elliot Berman <quic_eberman@quicinc.com> + +description: |+ + Gunyah virtual machines use this information to determine the capability IDs + of the message queues used to communicate with the Gunyah Resource Manager. + See also: https://github.com/quic/gunyah-resource-manager/blob/develop/src/vm_creation/dto_construct.c + +properties: + compatible: + const: gunyah-hypervisor + + "#address-cells": + description: Number of cells needed to represent 64-bit capability IDs. + const: 2 + + "#size-cells": + description: must be 0, because capability IDs are not memory address + ranges and do not have a size. + const: 0 + +patternProperties: + "^gunyah-resource-mgr(@.*)?": + type: object + description: + Resource Manager node which is required to communicate to Resource + Manager VM using Gunyah Message Queues. + + properties: + compatible: + const: gunyah-resource-manager + + reg: + items: + - description: Gunyah capability ID of the TX message queue + - description: Gunyah capability ID of the RX message queue + + interrupts: + items: + - description: Interrupt for the TX message queue + - description: Interrupt for the RX message queue + + additionalProperties: false + + required: + - compatible + - reg + - interrupts + +additionalProperties: false + +required: + - compatible + - "#address-cells" + - "#size-cells" + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + hypervisor { + #address-cells = <2>; + #size-cells = <0>; + compatible = "gunyah-hypervisor"; + + gunyah-resource-mgr@0 { + compatible = "gunyah-resource-manager"; + interrupts = <GIC_SPI 3 IRQ_TYPE_EDGE_RISING>, /* TX full IRQ */ + <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; /* RX empty IRQ */ + reg = <0x00000000 0x00000000>, <0x00000000 0x00000001>; + /* TX, RX cap ids */ + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 1dd8f58d6e01..f32320a9efa4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8939,6 +8939,7 @@ M: Elliot Berman <quic_eberman@quicinc.com> M: Murali Nalajala <quic_mnalajal@quicinc.com> L: linux-arm-msm@vger.kernel.org S: Supported +F: Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml F: Documentation/virt/gunyah/ HABANALABS PCI DRIVER