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 };
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