Documentation/ABI/testing/debugfs-vfio

Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/debugfs-vfio

File Facts

System: Linux kernel
Corpus path: Documentation/ABI/testing/debugfs-vfio
Extension: [no extension]
Size: 1197 bytes
Lines: 32
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: Documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

What:		/sys/kernel/debug/vfio
Date:		December 2023
KernelVersion:	6.8
Contact:	Longfang Liu <liulongfang@huawei.com>
Description:	This debugfs file directory is used for debugging
		of vfio devices, it's a common directory for all vfio devices.
		Vfio core will create a device subdirectory under this
		directory.

What:		/sys/kernel/debug/vfio/<device>/migration
Date:		December 2023
KernelVersion:	6.8
Contact:	Longfang Liu <liulongfang@huawei.com>
Description:	This debugfs file directory is used for debugging
		of vfio devices that support live migration.
		The debugfs of each vfio device that supports live migration
		could be created under this directory.

What:		/sys/kernel/debug/vfio/<device>/migration/state
Date:		December 2023
KernelVersion:	6.8
Contact:	Longfang Liu <liulongfang@huawei.com>
Description:	Read the live migration status of the vfio device.
		The contents of the state file reflects the migration state
		relative to those defined in the vfio_device_mig_state enum

What:		/sys/kernel/debug/vfio/<device>/migration/features
Date:		Oct 2025
KernelVersion:	6.18
Contact:	Cédric Le Goater <clg@redhat.com>
Description:	Read the migration features of the vfio device.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

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.