drivers/perf/arm_pmu_acpi.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/arm_pmu_acpi.c

Extension

.c

Size

10190 bytes

Lines

440

Domain

Driver Families

Bucket

drivers/perf

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/acpi.h
• linux/cpumask.h
• linux/init.h
• linux/irq.h
• linux/irqdesc.h
• linux/percpu.h
• linux/perf/arm_pmu.h
• asm/cpu.h
• asm/cputype.h

Detected Declarations

• function arm_pmu_acpi_register_irq
• function arm_pmu_acpi_unregister_irq
• function arm_acpi_register_pmu_device
• function arm_spe_parse_gsi
• function arm_spe_acpi_register_device
• function arm_spe_acpi_register_device
• function arm_trbe_parse_gsi
• function arm_trbe_acpi_register_device
• function arm_trbe_acpi_register_device
• function for_each_possible_cpu
• function once
• function for_each_possible_cpu
• function PMU
• function for_each_cpu
• function arm_pmu_acpi_associate_pmu_cpu
• function arm_pmu_acpi_cpu_starting
• function arm_pmu_acpi_probe_matching_cpus
• function for_each_online_cpu
• function arm_pmu_acpi_probe
• function arm_pmu_acpi_init
• module init arm_pmu_acpi_init

Annotated Snippet

subsys_initcall(arm_pmu_acpi_init)

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/cpumask.h`, `linux/init.h`, `linux/irq.h`, `linux/irqdesc.h`, `linux/percpu.h`, `linux/perf/arm_pmu.h`, `asm/cpu.h`.
• Detected declarations: `function arm_pmu_acpi_register_irq`, `function arm_pmu_acpi_unregister_irq`, `function arm_acpi_register_pmu_device`, `function arm_spe_parse_gsi`, `function arm_spe_acpi_register_device`, `function arm_spe_acpi_register_device`, `function arm_trbe_parse_gsi`, `function arm_trbe_acpi_register_device`, `function arm_trbe_acpi_register_device`, `function for_each_possible_cpu`.
• Atlas domain: Driver Families / drivers/perf.
• Implementation status: integration implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.