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Tue, 11 Oct 2022 00:09:24 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Mon, 10 Oct 2022 17:09:23 -0700 From: Elliot Berman To: Bjorn Andersson , Rob Herring , Krzysztof Kozlowski CC: Elliot Berman , Murali Nalajala , Trilok Soni , "Srivatsa Vaddagiri" , Carl van Schaik , Prakruthi Deepak Heragu , Andy Gross , Dmitry Baryshkov , Jassi Brar , , Mark Rutland , Lorenzo Pieralisi , Sudeep Holla , Marc Zyngier , Jonathan Corbet , Will Deacon , Catalin Marinas , Arnd Bergmann , Greg Kroah-Hartman , , , , Subject: [PATCH v5 02/13] dt-bindings: Add binding for gunyah hypervisor Date: Mon, 10 Oct 2022 17:08:29 -0700 Message-ID: <20221011000840.289033-3-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221011000840.289033-1-quic_eberman@quicinc.com> References: <20221011000840.289033-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: ac6btpWz-18PEzqAMWCJ8reXLFeJTfNj X-Proofpoint-ORIG-GUID: ac6btpWz-18PEzqAMWCJ8reXLFeJTfNj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-10-10_12,2022-10-10_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 clxscore=1015 phishscore=0 spamscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210100143 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221010_170935_025970_315E7B09 X-CRM114-Status: GOOD ( 24.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. Signed-off-by: Elliot Berman --- .../bindings/firmware/gunyah-hypervisor.yaml | 87 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 88 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..f0a14101e2fd --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml @@ -0,0 +1,87 @@ +# 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 + - Elliot Berman + +description: |+ + On systems which support devicetree, Gunyah generates and overlays a deviceetree overlay which + describes the basic configuration of the hypervisor. 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: + items: + - const: gunyah-hypervisor-1.0 + - 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: + items: + - const: gunyah-resource-manager-1-0 + - 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 + + hypervisor { + #address-cells = <2>; + #size-cells = <0>; + compatible = "gunyah-hypervisor-1.0", "gunyah-hypervisor"; + + gunyah-resource-mgr@0 { + compatible = "gunyah-resource-manager-1-0", "gunyah-resource-manager"; + interrupts = , /* TX full IRQ */ + ; /* RX empty IRQ */ + reg = <0x00000000 0x00000000>, <0x00000000 0x00000001>; + /* TX, RX cap ids */ + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 91d00b00d91c..ef6de7599d98 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8884,6 +8884,7 @@ M: Elliot Berman M: Murali Nalajala L: linux-arm-msm@vger.kernel.org S: Supported +F: Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml F: Documentation/virt/gunyah/ HABANALABS PCI DRIVER