drivers/vfio/pci/Kconfig

config VFIO_PCI
	tristate "VFIO support for PCI devices"
	depends on VFIO && PCI && EVENTFD
	help
	  Support for the PCI VFIO bus driver.  This is required to make
	  use of PCI drivers using the VFIO framework.

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