drivers/vfio/pci/virtio/Kconfig

Source file repositories/reference/linux-study-clean/drivers/vfio/pci/virtio/Kconfig

File Facts

System: Linux kernel
Corpus path: drivers/vfio/pci/virtio/Kconfig
Extension: [no extension]
Size: 1206 bytes
Lines: 32
Domain: Driver Families
Bucket: drivers/vfio
Inferred role: Driver Families: build/configuration rule
Status: atlas-only

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.

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

# SPDX-License-Identifier: GPL-2.0-only
config VIRTIO_VFIO_PCI
	tristate "VFIO support for VIRTIO PCI VF devices"
	depends on VIRTIO_PCI
	select VFIO_PCI_CORE
	help
	  This provides migration support for VIRTIO NET and BLOCK PCI VF
	  devices using the VFIO framework. Migration support requires the
	  SR-IOV PF device to support specific VIRTIO extensions,
	  otherwise this driver provides no additional functionality
	  beyond vfio-pci.

	  Migration support in this driver relies on dirty page tracking
	  provided by the IOMMU hardware and exposed through IOMMUFD, any
	  other use cases are dis-recommended.

	  If you don't know what to do here, say N.

config VIRTIO_VFIO_PCI_ADMIN_LEGACY
	bool "Legacy I/O support for VIRTIO NET PCI VF devices"
	depends on VIRTIO_VFIO_PCI && VIRTIO_PCI_ADMIN_LEGACY
	default y
	help
	  This extends the virtio-vfio-pci driver to support legacy I/O
	  access, allowing use of legacy virtio drivers with VIRTIO NET
	  PCI VF devices. Legacy I/O support requires the SR-IOV PF
	  device to support and enable specific VIRTIO extensions,
	  otherwise this driver provides no additional functionality
	  beyond vfio-pci.

	  If you don't know what to do here, say N.

Annotation

Atlas domain: Driver Families / drivers/vfio.
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.