drivers/perf/qcom_l3_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/qcom_l3_pmu.c

Extension

.c

Size

24062 bytes

Lines

824

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/acpi.h
• linux/bitops.h
• linux/interrupt.h
• linux/io.h
• linux/list.h
• linux/module.h
• linux/perf_event.h
• linux/platform_device.h

Detected Declarations

• struct l3cache_pmu
• struct l3cache_event_ops
• function Copyright
• function event_uses_long_counter
• function event_num_counters
• function qcom_l3_cache__64bit_counter_start
• function qcom_l3_cache__64bit_counter_stop
• function qcom_l3_cache__64bit_counter_update
• function qcom_l3_cache__32bit_counter_start
• function qcom_l3_cache__32bit_counter_stop
• function qcom_l3_cache__32bit_counter_update
• function qcom_l3_cache__init
• function qcom_l3_cache__handle_irq
• function for_each_set_bit
• function qcom_l3_cache__pmu_enable
• function qcom_l3_cache__pmu_disable
• function qcom_l3_cache__validate_event_group
• function for_each_sibling_event
• function qcom_l3_cache__event_init
• function qcom_l3_cache__event_start
• function qcom_l3_cache__event_stop
• function qcom_l3_cache__event_add
• function qcom_l3_cache__event_del
• function qcom_l3_cache__event_read
• function l3cache_pmu_event_show
• function cpumask_show
• function qcom_l3_cache_pmu_online_cpu
• function qcom_l3_cache_pmu_offline_cpu
• function qcom_l3_cache_pmu_probe
• function register_qcom_l3_cache_pmu_driver
• module init register_qcom_l3_cache_pmu_driver

Annotated Snippet

device_initcall(register_qcom_l3_cache_pmu_driver);

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/bitops.h`, `linux/interrupt.h`, `linux/io.h`, `linux/list.h`, `linux/module.h`, `linux/perf_event.h`, `linux/platform_device.h`.
• Detected declarations: `struct l3cache_pmu`, `struct l3cache_event_ops`, `function Copyright`, `function event_uses_long_counter`, `function event_num_counters`, `function qcom_l3_cache__64bit_counter_start`, `function qcom_l3_cache__64bit_counter_stop`, `function qcom_l3_cache__64bit_counter_update`, `function qcom_l3_cache__32bit_counter_start`, `function qcom_l3_cache__32bit_counter_stop`.
• 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.