Based on kernel version 6.18. Page generated on 2025-12-02 09:03 EST.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/interrupt-controller/riscv,rpmi-mpxy-system-msi.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: RISC-V RPMI system MSI service group based message proxy maintainers: - Anup Patel <anup@brainfault.org> description: | The RISC-V Platform Management Interface (RPMI) [1] defines a messaging protocol which is modular and extensible. The supervisor software can send/receive RPMI messages via SBI MPXY extension [2] or some dedicated supervisor-mode RPMI transport. The RPMI specification [1] defines system MSI service group which allow application processors to receive MSIs upon system events such as P2A doorbell, graceful shutdown/reboot request, CPU hotplug event, memory hotplug event, etc from the platform microcontroller. The SBI implementation (machine mode firmware or hypervisor) can implement an SBI MPXY channel to allow RPMI system MSI service group access to the supervisor software. =========================================== 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-system-msi 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: - | interrupt-controller { compatible = "riscv,rpmi-mpxy-system-msi"; mboxes = <&rpmi_shmem_mbox 0x2>; riscv,sbi-mpxy-channel-id = <0x2000>; }; ... |