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Thu, 8 Oct 2026 09:12:08 +0000 From: Joshua Yeong To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, rafael@kernel.org, viresh.kumar@linaro.org, ulfh@kernel.org, rahul@summations.net, anup@brainfault.org, lftan.linux@gmail.com Cc: alex@ghiti.fr, joshua.yeong@starfivetech.com, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/7] dt-bindings: dvfs: Add RPMI performance service message proxy bindings Date: Thu, 8 Oct 2026 17:10:25 +0800 Message-ID: <20261008091032.2832333-2-joshua.yeong@starfivetech.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261008091032.2832333-1-joshua.yeong@starfivetech.com> References: <20261008091032.2832333-1-joshua.yeong@starfivetech.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: ZQ0PR01CA0015.CHNPR01.prod.partner.outlook.cn (2406:e500:c550:5::9) To NT0PR01MB1325.CHNPR01.prod.partner.outlook.cn (2406:e500:c510:f::11) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: NT0PR01MB1325:EE_|NT0PR01MB1309:EE_ X-MS-Office365-Filtering-Correlation-Id: 82d6d7cb-a6cd-47b7-b26e-08df251c3adf X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|23010399003|7416014|52116014|921020|38350700014|56012099006|10067099003|22082099003|18002099003|6133799003|3023799007; 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The RPMI performance service group is defined by the RISC-V Platform Management Interface (RPMI) specification. Signed-off-by: Joshua Yeong --- .../dvfs/riscv,rpmi-mpxy-performance.yaml | 65 +++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 Documentation/devicetree/bindings/dvfs/riscv,rpmi-mpxy-performance.yaml diff --git a/Documentation/devicetree/bindings/dvfs/riscv,rpmi-mpxy-performance.yaml b/Documentation/devicetree/bindings/dvfs/riscv,rpmi-mpxy-performance.yaml new file mode 100644 index 000000000000..4a05c48c1e12 --- /dev/null +++ b/Documentation/devicetree/bindings/dvfs/riscv,rpmi-mpxy-performance.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dvfs/riscv,rpmi-mpxy-performance.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: RISC-V RPMI performance service group based message proxy + +maintainers: + - Joshua Yeong + +description: | + The RISC-V Platform Management Interface (RPMI) [1] defines a modular and + extensible messaging protocol for platform management functions. The supervisor + software can send and receive RPMI messages via SBI MPXY extension [2] + or via a dedicated supervisor-mode RPMI transport. + + The RPMI specification [1] defines performance service group (performance + domain) for accessing and controlling platform-managed performance-related + resources implemented by a platform microcontroller. The SBI implementation + (machine mode firmware or hypervisor) can implement an SBI MPXY channel + to allow supervisor software to access the RPMI performance service group. + + =========================================== + References + =========================================== + + [1] RISC-V Platform Management Interface (RPMI) v1.0 (or higher) + https://github.com/riscv-non-isa/riscv-rpmi/releases + + [2] RISC-V Supervisor Binary Interface (SBI) v3.0 (or higher) + https://github.com/riscv-non-isa/riscv-sbi-doc/releases + +properties: + compatible: + description: + Intended for use by the SBI implementation. + const: riscv,rpmi-mpxy-performance + + mboxes: + maxItems: 1 + description: + Mailbox channel of the underlying RPMI transport. + + riscv,sbi-mpxy-channel-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + The SBI MPXY channel id to be used for providing RPMI access to + the supervisor software. + +required: + - compatible + - mboxes + - riscv,sbi-mpxy-channel-id + +additionalProperties: false + +examples: + - | + performance { + compatible = "riscv,rpmi-mpxy-performance"; + mboxes = <&rpmi_shmem_mbox 0x0a>; + riscv,sbi-mpxy-channel-id = <0x1003>; + }; +... -- 2.43.0