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

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/perf/spe-pmu.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: ARMv8.2 Statistical Profiling Extension (SPE) Performance Monitor Units (PMU)
   8
   9 maintainers:
  10   - Will Deacon <will@kernel.org>
  11
  12 description:
  13   ARMv8.2 introduces the optional Statistical Profiling Extension for collecting
  14   performance sample data using an in-memory trace buffer.
  15
  16 properties:
  17   compatible:
  18     const: arm,statistical-profiling-extension-v1
  19
  20   interrupts:
  21     maxItems: 1
  22     description: |
  23       The PPI to signal SPE events. For heterogeneous systems where SPE is only
  24       supported on a subset of the CPUs, please consult the arm,gic-v3 binding
  25       for details on describing a PPI partition.
  26
  27 additionalProperties: false
  28
  29 required:
  30   - compatible
  31   - interrupts
  32
  33 examples:
  34   - |
  35     #include <dt-bindings/interrupt-controller/arm-gic.h>
  36
  37     spe-pmu {
  38         compatible = "arm,statistical-profiling-extension-v1";
  39         interrupts = <GIC_PPI 5 IRQ_TYPE_LEVEL_HIGH>;
  40     };