4 config ARCH_SUPPORTS_MSI
9 bool "Message Signaled Interrupts (MSI and MSI-X)"
11 depends on ARCH_SUPPORTS_MSI
13 This allows device drivers to enable MSI (Message Signaled
14 Interrupts). Message Signaled Interrupts enable a device to
15 generate an interrupt using an inbound Memory Write on its
16 PCI bus instead of asserting a device IRQ pin.
18 Use of PCI MSI interrupts can be disabled at kernel boot time
19 by using the 'pci=nomsi' option. This disables MSI for the
22 If you don't know what to do here, say N.
24 config PCI_MULTITHREAD_PROBE
25 bool "PCI Multi-threaded probe (EXPERIMENTAL)"
26 depends on PCI && EXPERIMENTAL && BROKEN
28 Say Y here if you want the PCI core to spawn a new thread for
29 every PCI device that is probed. This can cause a huge
30 speedup in boot times on multiprocessor machines, and even a
31 smaller speedup on single processor machines.
33 But it can also cause lots of bad things to happen. A number
34 of PCI drivers cannot properly handle running in this way,
35 some will just not work properly at all, while others might
36 decide to blow up power supplies with a huge load all at once,
37 so use this option at your own risk.
39 It is very unwise to use this option if you are not using a
40 boot process that can handle devices being created in any
41 order. A program that can create persistent block and network
42 device names (like udev) is a good idea if you wish to use
45 Again, use this option at your own risk, you have been warned!
51 depends on PCI && DEBUG_KERNEL
53 Say Y here if you want the PCI core to produce a bunch of debug
54 messages to the system log. Select this if you are having a
55 problem with PCI support and want to see more of what is going on.
60 bool "Interrupts on hypertransport devices"
62 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
64 This allows native hypertransport devices to use interrupts.