linux-kernel - [PATCH 2/5] dt-bindings: firmware: Add RPMI performance service bindings

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260106092117.3727152-3-joshua.yeong@starfivetech.com>
Date: Tue,  6 Jan 2026 17:21:13 +0800
From: Joshua Yeong <joshua.yeong@...rfivetech.com>
To: rahul@...mations.net,
	anup@...infault.org,
	joshua.yeong@...rfivetech.com,
	leyfoon.tan@...rfivetech.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	pjw@...nel.org,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	alex@...ti.fr,
	rafael@...nel.org,
	viresh.kumar@...aro.org,
	sboyd@...nel.org,
	jms@....tenstorrent.com,
	darshan.prajapati@...fochips.com,
	charlie@...osinc.com,
	dfustini@....tenstorrent.com,
	michal.simek@....com,
	cyy@...self.name,
	jassisinghbrar@...il.com,
	andriy.shevchenko@...ux.intel.com
Cc: linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH 2/5] dt-bindings: firmware: Add RPMI performance service bindings

Add device tree bindings for the RPMI performance service group based
controller for the supervisor software.

The RPMI performance service group is defined by the RISC-V Platform
Management Interface (RPMI) specification.

Signed-off-by: Joshua Yeong <joshua.yeong@...rfivetech.com>
---
 .../firmware/riscv,rpmi-performance.yaml      | 62 +++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/riscv,rpmi-performance.yaml

diff --git a/Documentation/devicetree/bindings/firmware/riscv,rpmi-performance.yaml b/Documentation/devicetree/bindings/firmware/riscv,rpmi-performance.yaml
new file mode 100644
index 000000000000..61adf6b1bed8
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/riscv,rpmi-performance.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/riscv,rpmi-performance.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V RPMI performance service group based cpufreq controller
+
+maintainers:
+  - Joshua Yeong <joshua.yeong@...rfivetech.com>
+
+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, as implemented by a platform microcontroller. Supervisor software
+  can interact with the RPMI performance service group through an SBI MPXY
+  channel or through a dedicated supervisor-mode RPMI transport.
+
+  ===========================================
+  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 supervisor software.
+    const: riscv,rpmi-performance
+
+  mboxes:
+    maxItems: 1
+    description:
+      Mailbox channel of the underlying RPMI transport or SBI message proxy channel.
+
+  "#performance-domain-cells":
+    const: 1
+
+required:
+  - compatible
+  - mboxes
+  - "#performance-domain-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    performance: rpmi-performance {
+        compatible = "riscv,rpmi-performance";
+        mboxes = <&mpxy_mbox 0x1001 0x0>;
+        #performance-domain-cells = <0x01>;
+    };
+...
-- 
2.43.0