drivers/xen/xen-acpi-processor.c

File Facts

System

Linux kernel

Corpus path

drivers/xen/xen-acpi-processor.c

Extension

.c

Size

17181 bytes

Lines

601

Domain

Driver Families

Bucket

drivers/xen

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/cpumask.h
• linux/cpufreq.h
• linux/freezer.h
• linux/kernel.h
• linux/kthread.h
• linux/init.h
• linux/module.h
• linux/types.h
• linux/syscore_ops.h
• linux/acpi.h
• acpi/processor.h
• xen/xen.h
• xen/interface/platform.h
• asm/xen/hypercall.h

Detected Declarations

• function push_cxx_to_hypervisor
• function xen_copy_pss_data
• function xen_copy_psd_data
• function xen_copy_pct_data
• function push_pxx_to_hypervisor
• function upload_pm_data
• function get_max_acpi_id
• function read_acpi_id
• function check_acpi_ids
• function for_each_set_bit
• function free_acpi_perf_data
• function xen_upload_processor_pm_data
• function for_each_possible_cpu
• function xen_acpi_processor_resume_worker
• function xen_acpi_processor_resume
• function xen_acpi_processor_init
• function for_each_possible_cpu
• function xen_acpi_processor_exit
• module init xen_acpi_processor_init

Annotated Snippet

device_initcall(xen_acpi_processor_init);
module_exit(xen_acpi_processor_exit);

Annotation

• Immediate include surface: `linux/cpumask.h`, `linux/cpufreq.h`, `linux/freezer.h`, `linux/kernel.h`, `linux/kthread.h`, `linux/init.h`, `linux/module.h`, `linux/types.h`.
• Detected declarations: `function push_cxx_to_hypervisor`, `function xen_copy_pss_data`, `function xen_copy_psd_data`, `function xen_copy_pct_data`, `function push_pxx_to_hypervisor`, `function upload_pm_data`, `function get_max_acpi_id`, `function read_acpi_id`, `function check_acpi_ids`, `function for_each_set_bit`.
• Atlas domain: Driver Families / drivers/xen.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.