drivers/pci/Kconfig

File Facts

System

Linux kernel

Corpus path

drivers/pci/Kconfig

Extension

[no extension]

Size

9864 bytes

Lines

338

Domain

Representative Device Path

Bucket

PCIe NVMe Storage Path

Inferred role

Representative Device Path: build/configuration rule

Status

atlas-only

Why This File Exists

Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.

• Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.

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
#
# PCI configuration
#

# select this to offer the PCI prompt
config HAVE_PCI
	bool

# select this to unconditionally force on PCI support
config FORCE_PCI
	bool
	select HAVE_PCI
	select PCI

# select this to provide a generic PCI iomap,
# without PCI itself having to be defined
config GENERIC_PCI_IOMAP
	bool

menuconfig PCI
	bool "PCI support"
	depends on HAVE_PCI
	depends on MMU
	help
	  This option enables support for the PCI local bus, including
	  support for PCI-X and the foundations for PCI Express support.
	  Say 'Y' here unless you know what you are doing.

if PCI

config PCI_DOMAINS
	bool

config PCI_DOMAINS_GENERIC
	bool
	select PCI_DOMAINS

config PCI_SYSCALL
	bool

source "drivers/pci/pcie/Kconfig"

config PCI_MSI
	bool "Message Signaled Interrupts (MSI and MSI-X)"
	select GENERIC_MSI_IRQ
	help
	   This allows device drivers to enable MSI (Message Signaled
	   Interrupts).  Message Signaled Interrupts enable a device to
	   generate an interrupt using an inbound Memory Write on its
	   PCI bus instead of asserting a device IRQ pin.

	   Use of PCI MSI interrupts can be disabled at kernel boot time
	   by using the 'pci=nomsi' option.  This disables MSI for the
	   entire system.

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

config PCI_MSI_ARCH_FALLBACKS
	bool

config PCI_QUIRKS
	default y
	bool "Enable PCI quirk workarounds" if EXPERT
	help
	  This enables workarounds for various PCI chipset bugs/quirks.
	  Disable this only if your target machine is unaffected by PCI
	  quirks.

config PCI_DEBUG

Annotation

• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• Implementation status: atlas-only.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.