Commit b25bccb6 authored by Andre Przywara's avatar Andre Przywara Committed by Rob Herring
Browse files

dt-bindings: arm: spe-pmu: convert to DT schema 



Convert the Arm Statisical Profiling Extension (SPE) binding to DT
schema.
Not much to see here, basically just the announcement that SPE is
integrated on the system level and where the IRQ is routed to.

Move it into the more suitable perf/ directory on the way.

Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220506140533.3566431-3-andre.przywara@arm.com
parent e4783856

Documentation/devicetree/bindings/arm/spe-pmu.txt

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



ARMv8.2 introduces the optional Statistical Profiling Extension for collecting

performance sample data using an in-memory trace buffer.



** SPE Required properties:



- compatible : should be one of:

	       "arm,statistical-profiling-extension-v1"



- interrupts : Exactly 1 PPI must be listed. 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.



** Example:



spe-pmu {

        compatible = "arm,statistical-profiling-extension-v1";

        interrupts = <GIC_PPI 05 IRQ_TYPE_LEVEL_HIGH &part1>;

};

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

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# 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>;

    };