drivers/perf/thunderx2_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/thunderx2_pmu.c

Extension

.c

Size

27830 bytes

Lines

1045

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/acpi.h
• linux/cpuhotplug.h
• linux/perf_event.h
• linux/platform_device.h

Detected Declarations

• struct tx2_uncore_pmu
• enum tx2_uncore_type
• function tx2_pmu_event_show
• function cpumask_show
• function reg_readl
• function reg_writel
• function alloc_counter
• function free_counter
• function init_cntr_base_l3c
• function init_cntr_base_dmc
• function init_cntr_base_ccpi2
• function uncore_start_event_l3c
• function uncore_stop_event_l3c
• function uncore_start_event_dmc
• function uncore_stop_event_dmc
• function uncore_start_event_ccpi2
• function uncore_stop_event_ccpi2
• function tx2_uncore_event_update
• function get_tx2_pmu_type
• function tx2_uncore_validate_event
• function tx2_uncore_validate_event_group
• function for_each_sibling_event
• function tx2_uncore_event_init
• function tx2_uncore_event_start
• function tx2_uncore_event_stop
• function tx2_uncore_event_add
• function tx2_uncore_event_del
• function tx2_uncore_event_read
• function tx2_hrtimer_callback
• function for_each_set_bit
• function tx2_uncore_pmu_register
• function tx2_uncore_pmu_add_dev
• function list_for_each_entry
• function tx2_uncore_pmu_add
• function tx2_uncore_pmu_online_cpu
• function tx2_uncore_pmu_offline_cpu
• function tx2_uncore_probe
• function tx2_uncore_remove
• function tx2_uncore_driver_init
• function tx2_uncore_driver_exit
• module init tx2_uncore_driver_init

Annotated Snippet

module_init(tx2_uncore_driver_init);

static void __exit tx2_uncore_driver_exit(void)
{
	platform_driver_unregister(&tx2_uncore_driver);
	cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE);
}
module_exit(tx2_uncore_driver_exit);

MODULE_DESCRIPTION("ThunderX2 UNCORE PMU driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ganapatrao Kulkarni <gkulkarni@cavium.com>");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/cpuhotplug.h`, `linux/perf_event.h`, `linux/platform_device.h`.
• Detected declarations: `struct tx2_uncore_pmu`, `enum tx2_uncore_type`, `function tx2_pmu_event_show`, `function cpumask_show`, `function reg_readl`, `function reg_writel`, `function alloc_counter`, `function free_counter`, `function init_cntr_base_l3c`, `function init_cntr_base_dmc`.
• 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.