# # PCI configuration # config ARCH_SUPPORTS_MSI bool default n config PCI_MSI bool "Message Signaled Interrupts (MSI and MSI-X)" depends on PCI depends on ARCH_SUPPORTS_MSI 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_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. config PCI_STUB tristate "PCI Stub driver" depends on PCI help Say Y or M here if you want be able to reserve a PCI device when it is going to be assigned to a guest operating system. When in doubt, say N. config XEN_PCIDEV_FRONTEND tristate "Xen PCI Frontend" depends on PCI && X86 && XEN select HOTPLUG select PCI_XEN select XEN_XENBUS_FRONTEND default y help The PCI device frontend driver allows the kernel to import arbitrary PCI devices from a PCI backend to support PCI driver domains. config XEN_PCIDEV_FE_DEBUG bool "Xen PCI Frontend debugging" depends on XEN_PCIDEV_FRONTEND && PCI_DEBUG help Say Y here if you want the Xen PCI frontend to produce a bunch of debug messages to the system log. Select this if you are having a problem with Xen PCI frontend support and want to see more of what is going on. When in doubt, say N. config HT_IRQ bool "Interrupts on hypertransport devices" default y depends on PCI && X86_LOCAL_APIC && X86_IO_APIC help This allows native hypertransport devices to use interrupts. If unsure say Y. config PCI_IOV bool "PCI IOV support" depends on PCI help I/O Virtualization is a PCI feature supported by some devices which allows them to create virtual devices which share their physical resources. If unsure, say N. config PCI_IOAPIC bool depends on PCI depends on ACPI depends on HOTPLUG default y config PCI_LABEL def_bool y if (DMI || ACPI) select NLS