drivers/perf/arm_cspmu/ampere_cspmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/arm_cspmu/ampere_cspmu.c

Extension

.c

Size

7964 bytes

Lines

262

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.
• 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/io.h
• linux/module.h
• linux/topology.h
• arm_cspmu.h

Detected Declarations

• struct ampere_cspmu_ctx
• function ampere_cspmu_get_event_attrs
• function ampere_cspmu_get_format_attrs
• function ampere_cspmu_get_name
• function ampere_cspmu_set_cc_filter
• function ampere_cspmu_validate_configs
• function ampere_cspmu_validate_event
• function ampere_cspmu_init_ops
• function ampere_cspmu_init
• function ampere_cspmu_exit
• module init ampere_cspmu_init

Annotated Snippet

module_init(ampere_cspmu_init);
module_exit(ampere_cspmu_exit);

MODULE_DESCRIPTION("Ampere SoC Performance Monitor Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/io.h`, `linux/module.h`, `linux/topology.h`, `arm_cspmu.h`.
• Detected declarations: `struct ampere_cspmu_ctx`, `function ampere_cspmu_get_event_attrs`, `function ampere_cspmu_get_format_attrs`, `function ampere_cspmu_get_name`, `function ampere_cspmu_set_cc_filter`, `function ampere_cspmu_validate_configs`, `function ampere_cspmu_validate_event`, `function ampere_cspmu_init_ops`, `function ampere_cspmu_init`, `function ampere_cspmu_exit`.
• Atlas domain: Driver Families / drivers/perf.
• Implementation status: integration implementation candidate.

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.