drivers/perf/arm_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/arm_pmu.c

Extension

.c

Size

23625 bytes

Lines

972

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bitmap.h
• linux/cpumask.h
• linux/cpu_pm.h
• linux/export.h
• linux/kernel.h
• linux/perf/arm_pmu.h
• linux/slab.h
• linux/sched/clock.h
• linux/spinlock.h
• linux/irq.h
• linux/irqdesc.h
• asm/irq_regs.h

Detected Declarations

• struct pmu_irq_ops
• function armpmu_free_pmuirq
• function armpmu_free_pmunmi
• function armpmu_enable_percpu_pmuirq
• function armpmu_free_percpu_pmuirq
• function armpmu_enable_percpu_pmunmi
• function armpmu_disable_percpu_pmunmi
• function armpmu_free_percpu_pmunmi
• function arm_pmu_event_max_period
• function armpmu_map_cache_event
• function armpmu_map_hw_event
• function armpmu_map_raw_event
• function armpmu_map_event
• function armpmu_event_set_period
• function armpmu_event_update
• function armpmu_read
• function armpmu_stop
• function armpmu_start
• function armpmu_del
• function armpmu_add
• function validate_event
• function validate_group
• function for_each_sibling_event
• function armpmu_dispatch_irq
• function __hw_perf_event_init
• function armpmu_event_init
• function armpmu_enable
• function armpmu_disable
• function armpmu_filter
• function cpus_show
• function armpmu_count_irq_users
• function for_each_cpu
• function armpmu_find_irq_ops
• function for_each_cpu
• function armpmu_free_irq
• function armpmu_request_irq
• function armpmu_get_cpu_irq
• function arm_pmu_irq_is_nmi
• function arm_perf_starting_cpu
• function arm_perf_teardown_cpu
• function cpu_pm_pmu_setup
• function for_each_set_bit
• function cpu_pm_pmu_notify
• function cpu_pm_pmu_register
• function cpu_pm_pmu_unregister
• function cpu_pm_pmu_register
• function cpu_pm_pmu_unregister
• function cpu_pmu_destroy

Annotated Snippet

subsys_initcall(arm_pmu_hp_init);

Annotation

• Immediate include surface: `linux/bitmap.h`, `linux/cpumask.h`, `linux/cpu_pm.h`, `linux/export.h`, `linux/kernel.h`, `linux/perf/arm_pmu.h`, `linux/slab.h`, `linux/sched/clock.h`.
• Detected declarations: `struct pmu_irq_ops`, `function armpmu_free_pmuirq`, `function armpmu_free_pmunmi`, `function armpmu_enable_percpu_pmuirq`, `function armpmu_free_percpu_pmuirq`, `function armpmu_enable_percpu_pmunmi`, `function armpmu_disable_percpu_pmunmi`, `function armpmu_free_percpu_pmunmi`, `function arm_pmu_event_max_period`, `function armpmu_map_cache_event`.
• 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.