# # PCI configuration # config PCI_MSI bool "Message Signaled Interrupts (MSI and MSI-X)" depends on PCI depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64 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. If you don't know what to do here, say N. config PCI_LEGACY_PROC bool "Legacy /proc/pci interface" depends on PCI ---help--- This feature enables a procfs file -- /proc/pci -- that provides a summary of PCI devices in the system. This feature has been deprecated as of v2.5.53, in favor of using the tool lspci(8). This feature may be removed at a future date. lspci can provide the same data, as well as much more. lspci is a part of the pci-utils package, which should be installed by your distribution. See <file:Documentation/Changes> for information on where to get the latest version. When in doubt, say N. config PCI_NAMES bool "PCI device name database" depends on PCI ---help--- By default, the kernel contains a database of all known PCI device names to make the information in /proc/pci, /proc/ioports and similar files comprehensible to the user. This database increases size of the kernel image by about 80KB. This memory is freed after the system boots up if CONFIG_HOTPLUG is not set. Anyway, if you are building an installation floppy or kernel for an embedded system where kernel image size really matters, you can disable this feature and you'll get device ID numbers instead of names. When in doubt, say Y. config PCI_DEBUG bool "PCI Debugging" depends on PCI && DEBUG_KERNEL help Say Y here if you want the PCI core to produce a bunch of debug messages to the system log. Select this if you are having a problem with PCI support and want to see more of what is going on. When in doubt, say N.