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This patch documents the devicetree binding in use for ARM SPE. Cc: Rob Herring <robh@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
21 lines
710 B
Plaintext
21 lines
710 B
Plaintext
* ARMv8.2 Statistical Profiling Extension (SPE) Performance Monitor Units (PMU)
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ARMv8.2 introduces the optional Statistical Profiling Extension for collecting
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performance sample data using an in-memory trace buffer.
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** SPE Required properties:
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- compatible : should be one of:
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"arm,statistical-profiling-extension-v1"
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- interrupts : Exactly 1 PPI must be listed. For heterogeneous systems where
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SPE is only supported on a subset of the CPUs, please consult
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the arm,gic-v3 binding for details on describing a PPI partition.
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** Example:
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spe-pmu {
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compatible = "arm,statistical-profiling-extension-v1";
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interrupts = <GIC_PPI 05 IRQ_TYPE_LEVEL_HIGH &part1>;
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};
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