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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# PCI configuration
3#
4config PCI_MSI
5 bool "Message Signaled Interrupts (MSI and MSI-X)"
6 depends on PCI
7 depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64
8 help
9 This allows device drivers to enable MSI (Message Signaled
10 Interrupts). Message Signaled Interrupts enable a device to
11 generate an interrupt using an inbound Memory Write on its
12 PCI bus instead of asserting a device IRQ pin.
13
Matthew Wilcox309e57d2006-03-05 22:33:34 -070014 Use of PCI MSI interrupts can be disabled at kernel boot time
15 by using the 'pci=nomsi' option. This disables MSI for the
16 entire system.
17
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 If you don't know what to do here, say N.
19
Greg Kroah-Hartman0f397f82006-07-18 10:59:59 -070020config PCI_MULTITHREAD_PROBE
21 bool "PCI Multi-threaded probe (EXPERIMENTAL)"
22 depends on PCI && EXPERIMENTAL
23 help
24 Say Y here if you want the PCI core to spawn a new thread for
25 every PCI device that is probed. This can cause a huge
26 speedup in boot times on multiprocessor machines, and even a
27 smaller speedup on single processor machines.
28
29 But it can also cause lots of bad things to happen. A number
30 of PCI drivers can not properly handle running in this way,
31 some will just not work properly at all, while others might
32 decide to blow up power supplies with a huge load all at once,
33 so use this option at your own risk.
34
35 It is very unwise to use this option if you are not using a
36 boot process that can handle devices being created in any
37 order. A program that can create persistant block and network
38 device names (like udev) is a good idea if you wish to use
39 this option.
40
41 Again, use this option at your own risk, you have been warned!
42
43 When in doubt, say N.
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045config PCI_DEBUG
46 bool "PCI Debugging"
47 depends on PCI && DEBUG_KERNEL
48 help
49 Say Y here if you want the PCI core to produce a bunch of debug
50 messages to the system log. Select this if you are having a
51 problem with PCI support and want to see more of what is going on.
52
53 When in doubt, say N.
54
Eric W. Biederman8b955b02006-10-04 02:16:55 -070055config HT_IRQ
56 bool "Interrupts on hypertransport devices"
57 default y
Adrian Bunkfbab41c2006-10-11 01:22:04 -070058 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
Eric W. Biederman8b955b02006-10-04 02:16:55 -070059 help
60 This allows native hypertransport devices to use interrupts.
61
62 If unsure say Y.