arch/x86/events/amd/power.c

File Facts

System

Linux kernel

Corpus path

arch/x86/events/amd/power.c

Extension

.c

Size

7310 bytes

Lines

310

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/slab.h
• linux/perf_event.h
• asm/cpu_device_id.h
• asm/cpuid/api.h
• asm/msr.h
• ../perf_event.h

Detected Declarations

• function event_update
• function value
• function __pmu_event_start
• function pmu_event_start
• function pmu_event_stop
• function pmu_event_add
• function pmu_event_del
• function pmu_event_init
• function pmu_event_read
• function get_attr_cpumask
• function power_cpu_exit
• function power_cpu_init
• function amd_power_pmu_init
• function amd_power_pmu_exit
• module init amd_power_pmu_init

Annotated Snippet

module_init(amd_power_pmu_init);

static void __exit amd_power_pmu_exit(void)
{
	cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_AMD_POWER_ONLINE);
	perf_pmu_unregister(&pmu_class);
}
module_exit(amd_power_pmu_exit);

MODULE_AUTHOR("Huang Rui <ray.huang@amd.com>");
MODULE_DESCRIPTION("AMD Processor Power Reporting Mechanism");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/module.h`, `linux/slab.h`, `linux/perf_event.h`, `asm/cpu_device_id.h`, `asm/cpuid/api.h`, `asm/msr.h`, `../perf_event.h`.
• Detected declarations: `function event_update`, `function value`, `function __pmu_event_start`, `function pmu_event_start`, `function pmu_event_stop`, `function pmu_event_add`, `function pmu_event_del`, `function pmu_event_init`, `function pmu_event_read`, `function get_attr_cpumask`.
• Atlas domain: Architecture Layer / arch/x86.
• 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.