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# # 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 N. config PCI_LEGACY bool "Enable deprecated pci_find_* API" depends on PCI default y help Say Y here if you want to include support for the deprecated pci_find_slot() and pci_find_device() APIs. Most drivers have been converted over to using the proper hotplug APIs, so this option serves to include/exclude only a few drivers that are still using this API. 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 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. |