drivers/perf/starfive_starlink_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/starfive_starlink_pmu.c

Extension

.c

Size

17140 bytes

Lines

642

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/cpu_pm.h
• linux/io.h
• linux/irq.h
• linux/kernel.h
• linux/module.h
• linux/mod_devicetable.h
• linux/perf_event.h
• linux/platform_device.h
• linux/sysfs.h

Detected Declarations

• struct starlink_hw_events
• struct starlink_pmu
• function Copyright
• function starlink_pmu_sysfs_format_show
• function starlink_pmu_sysfs_event_show
• function cpumask_show
• function starlink_pmu_set_event_period
• function starlink_pmu_counter_start
• function starlink_pmu_counter_stop
• function starlink_pmu_update
• function starlink_pmu_start
• function starlink_pmu_stop
• function starlink_pmu_add
• function starlink_pmu_del
• function starlink_pmu_validate_event_group
• function for_each_sibling_event
• function starlink_pmu_event_init
• function starlink_pmu_handle_irq
• function starlink_setup_irqs
• function starlink_pmu_pm_notify
• function starlink_pmu_pm_register
• function starlink_pmu_pm_unregister
• function starlink_pmu_destroy
• function starlink_pmu_probe
• function for_each_possible_cpu
• function starlink_pmu_online_cpu
• function starlink_pmu_offline_cpu
• function starlink_pmu_init
• module init starlink_pmu_init

Annotated Snippet

device_initcall(starlink_pmu_init);

Annotation

• Immediate include surface: `linux/bitmap.h`, `linux/cpu_pm.h`, `linux/io.h`, `linux/irq.h`, `linux/kernel.h`, `linux/module.h`, `linux/mod_devicetable.h`, `linux/perf_event.h`.
• Detected declarations: `struct starlink_hw_events`, `struct starlink_pmu`, `function Copyright`, `function starlink_pmu_sysfs_format_show`, `function starlink_pmu_sysfs_event_show`, `function cpumask_show`, `function starlink_pmu_set_event_period`, `function starlink_pmu_counter_start`, `function starlink_pmu_counter_stop`, `function starlink_pmu_update`.
• 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.