Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml
Extension
.yaml
Size
1708 bytes
Lines
71
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

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Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/perf/arm,smmu-v3-pmcg.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Arm SMMUv3 Performance Monitor Counter Group

maintainers:
  - Will Deacon <will@kernel.org>
  - Robin Murphy <robin.murphy@arm.com>

description: |
  An SMMUv3 may have several Performance Monitor Counter Group (PMCG).
  They are standalone performance monitoring units that support both
  architected and IMPLEMENTATION DEFINED event counters.

properties:
  $nodename:
    pattern: "^pmu@[0-9a-f]*"
  compatible:
    oneOf:
      - items:
          - const: arm,mmu-600-pmcg
          - const: arm,smmu-v3-pmcg
      - const: arm,smmu-v3-pmcg

  reg:
    items:
      - description: Register page 0
      - description: Register page 1, if SMMU_PMCG_CFGR.RELOC_CTRS = 1
    minItems: 1

  interrupts:
    maxItems: 1

  msi-parent: true

required:
  - compatible
  - reg

anyOf:
  - required:
      - interrupts
  - required:
      - msi-parent

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>

    pmu@2b420000 {
            compatible = "arm,smmu-v3-pmcg";
            reg = <0x2b420000 0x1000>,
                  <0x2b430000 0x1000>;
            interrupts = <GIC_SPI 80 IRQ_TYPE_EDGE_RISING>;
            msi-parent = <&its 0xff0000>;
    };

    pmu@2b440000 {
            compatible = "arm,smmu-v3-pmcg";
            reg = <0x2b440000 0x1000>,
                  <0x2b450000 0x1000>;
            interrupts = <GIC_SPI 81 IRQ_TYPE_EDGE_RISING>;
            msi-parent = <&its 0xff0000>;
    };

Annotation

Implementation Notes