[deliverable/linux.git] / drivers / pci / Kconfig

#
# PCI configuration
#
config PCI_MSI
	bool "Message Signaled Interrupts (MSI and MSI-X)"
	depends on PCI
	depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64
	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_MULTITHREAD_PROBE
	bool "PCI Multi-threaded probe (EXPERIMENTAL)"
	depends on PCI && EXPERIMENTAL
	help
	  Say Y here if you want the PCI core to spawn a new thread for
	  every PCI device that is probed.  This can cause a huge
	  speedup in boot times on multiprocessor machines, and even a
	  smaller speedup on single processor machines.

	  But it can also cause lots of bad things to happen.  A number
	  of PCI drivers can not properly handle running in this way,
	  some will just not work properly at all, while others might
	  decide to blow up power supplies with a huge load all at once,
	  so use this option at your own risk.

	  It is very unwise to use this option if you are not using a
	  boot process that can handle devices being created in any
	  order.  A program that can create persistant block and network
	  device names (like udev) is a good idea if you wish to use
	  this option.

	  Again, use this option at your own risk, you have been warned!

	  When in doubt, say N.

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 HT_IRQ
	bool "Interrupts on hypertransport devices"
	default y
	depends on X86_LOCAL_APIC && X86_IO_APIC
	help
	   This allows native hypertransport devices to use interrupts.

	   If unsure say Y.
Commit	Line	Data
1da177e4 LT	1	#
	2	# PCI configuration
	3	#
	4	config 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
309e57df MW	14	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
1da177e4 LT	18	If you don't know what to do here, say N.
1da177e4 LT	19
0f397f86 GKH	20	config 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
1da177e4 LT	45	config 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
8b955b0d EB	55	config HT_IRQ
	56	bool "Interrupts on hypertransport devices"
	57	default y
8b955b0d EB	58	depends on X86_LOCAL_APIC && X86_IO_APIC
	59	help
	60	This allows native hypertransport devices to use interrupts.
	61
	62	If unsure say Y.