Documentation/devicetree/bindings/perf/spe-pmu.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/perf/spe-pmu.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/perf/spe-pmu.yaml
Extension
.yaml
Size
1088 bytes
Lines
41
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.

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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/spe-pmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARMv8.2 Statistical Profiling Extension (SPE) Performance Monitor Units (PMU)

maintainers:
  - Will Deacon <will@kernel.org>

description:
  ARMv8.2 introduces the optional Statistical Profiling Extension for collecting
  performance sample data using an in-memory trace buffer.

properties:
  compatible:
    const: arm,statistical-profiling-extension-v1

  interrupts:
    maxItems: 1
    description: |
      The PPI to signal SPE events. For heterogeneous systems where SPE is only
      supported on a subset of the CPUs, please consult the arm,gic-v3 binding
      for details on describing a PPI partition.

additionalProperties: false

required:
  - compatible
  - interrupts

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

    spe-pmu {
        compatible = "arm,statistical-profiling-extension-v1";
        interrupts = <GIC_PPI 5 IRQ_TYPE_LEVEL_HIGH>;
    };

Annotation

Implementation Notes