drivers/powercap/intel_rapl_msr.c

File Facts

System

Linux kernel

Corpus path

drivers/powercap/intel_rapl_msr.c

Extension

.c

Size

21163 bytes

Lines

603

Domain

Driver Families

Bucket

drivers/powercap

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/module.h
• linux/list.h
• linux/types.h
• linux/device.h
• linux/slab.h
• linux/log2.h
• linux/bitmap.h
• linux/delay.h
• linux/sysfs.h
• linux/cpu.h
• linux/powercap.h
• linux/suspend.h
• linux/intel_rapl.h
• linux/processor.h
• linux/platform_device.h
• linux/units.h
• linux/bits.h
• asm/cpu_device_id.h
• asm/intel-family.h
• asm/iosf_mbi.h
• asm/msr.h

Detected Declarations

• function rapl_cpu_online
• function rapl_cpu_down_prep
• function rapl_msr_read_raw
• function rapl_msr_update_func
• function rapl_msr_write_raw
• function rapl_check_unit_atom
• function set_floor_freq_atom
• function rapl_compute_time_window_atom
• function rapl_msr_probe
• function rapl_msr_remove
• function intel_rapl_msr_init
• function intel_rapl_msr_exit
• module init intel_rapl_msr_init

Annotated Snippet

module_init(intel_rapl_msr_init);

static void intel_rapl_msr_exit(void)
{
	platform_device_unregister(rapl_msr_platdev);
	platform_driver_unregister(&intel_rapl_msr_driver);
}
module_exit(intel_rapl_msr_exit);

MODULE_DESCRIPTION("Driver for Intel RAPL (Running Average Power Limit) control via MSR interface");
MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("INTEL_RAPL");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/list.h`, `linux/types.h`, `linux/device.h`, `linux/slab.h`, `linux/log2.h`, `linux/bitmap.h`.
• Detected declarations: `function rapl_cpu_online`, `function rapl_cpu_down_prep`, `function rapl_msr_read_raw`, `function rapl_msr_update_func`, `function rapl_msr_write_raw`, `function rapl_check_unit_atom`, `function set_floor_freq_atom`, `function rapl_compute_time_window_atom`, `function rapl_msr_probe`, `function rapl_msr_remove`.
• Atlas domain: Driver Families / drivers/powercap.
• 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.