11da177e4SLinus Torvalds# 21da177e4SLinus Torvalds# PCI configuration 31da177e4SLinus Torvalds# 41da177e4SLinus Torvaldsconfig PCI_MSI 51da177e4SLinus Torvalds bool "Message Signaled Interrupts (MSI and MSI-X)" 61da177e4SLinus Torvalds depends on PCI 71da177e4SLinus Torvalds depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64 81da177e4SLinus Torvalds help 91da177e4SLinus Torvalds This allows device drivers to enable MSI (Message Signaled 101da177e4SLinus Torvalds Interrupts). Message Signaled Interrupts enable a device to 111da177e4SLinus Torvalds generate an interrupt using an inbound Memory Write on its 121da177e4SLinus Torvalds PCI bus instead of asserting a device IRQ pin. 131da177e4SLinus Torvalds 14*309e57dfSMatthew Wilcox Use of PCI MSI interrupts can be disabled at kernel boot time 15*309e57dfSMatthew Wilcox by using the 'pci=nomsi' option. This disables MSI for the 16*309e57dfSMatthew Wilcox entire system. 17*309e57dfSMatthew Wilcox 181da177e4SLinus Torvalds If you don't know what to do here, say N. 191da177e4SLinus Torvalds 201da177e4SLinus Torvaldsconfig PCI_DEBUG 211da177e4SLinus Torvalds bool "PCI Debugging" 221da177e4SLinus Torvalds depends on PCI && DEBUG_KERNEL 231da177e4SLinus Torvalds help 241da177e4SLinus Torvalds Say Y here if you want the PCI core to produce a bunch of debug 251da177e4SLinus Torvalds messages to the system log. Select this if you are having a 261da177e4SLinus Torvalds problem with PCI support and want to see more of what is going on. 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds When in doubt, say N. 291da177e4SLinus Torvalds 30