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

#
# 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 Y.

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 XEN_PCIDEV_FRONTEND
        tristate "Xen PCI Frontend"
        depends on PCI && X86 && XEN
        select HOTPLUG
        select PCI_XEN
	select XEN_XENBUS_FRONTEND
        default y
        help
          The PCI device frontend driver allows the kernel to import arbitrary
          PCI devices from a PCI backend to support PCI driver domains.

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_ATS
	bool

config PCI_IOV
	bool "PCI IOV support"
	depends on PCI
	select PCI_ATS
	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.

config PCI_PRI
	bool "PCI PRI support"
	depends on PCI
	select PCI_ATS
	help
	  PRI is the PCI Page Request Interface. It allows PCI devices that are
	  behind an IOMMU to recover from page faults.

	  If unsure, say N.

config PCI_PASID
	bool "PCI PASID support"
	depends on PCI
	select PCI_ATS
	help
	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
	  to access more than one IO address space at the same time. To make
	  use of this feature an IOMMU is required which also supports PASIDs.
	  Select this option if you have such an IOMMU and want to compile the
	  driver for it into your kernel.

	  If unsure, say N.

config PCI_IOAPIC
	tristate "PCI IO-APIC hotplug support" if X86
	depends on PCI
	depends on ACPI
	depends on HOTPLUG
	default !X86

config PCI_LABEL
	def_bool y if (DMI || ACPI)
	select NLS
Commit	Line	Data
1da177e4 LT	1	#
	2	# PCI configuration
	3	#
f282b970 DW	4	config ARCH_SUPPORTS_MSI
	5	bool
	6	default n
	7
1da177e4 LT	8	config PCI_MSI
	9	bool "Message Signaled Interrupts (MSI and MSI-X)"
	10	depends on PCI
f282b970	11	depends on ARCH_SUPPORTS_MSI
1da177e4 LT	12	help
	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.
	17
309e57df MW	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
	20	entire system.
	21
3196180a	22	If you don't know what to do here, say Y.
1da177e4	23
1da177e4 LT	24	config PCI_DEBUG
	25	bool "PCI Debugging"
	26	depends on PCI && DEBUG_KERNEL
	27	help
	28	Say Y here if you want the PCI core to produce a bunch of debug
	29	messages to the system log. Select this if you are having a
	30	problem with PCI support and want to see more of what is going on.
	31
	32	When in doubt, say N.
	33
c70e0d9d CW	34	config PCI_STUB
	35	tristate "PCI Stub driver"
	36	depends on PCI
	37	help
	38	Say Y or M here if you want be able to reserve a PCI device
	39	when it is going to be assigned to a guest operating system.
	40
	41	When in doubt, say N.
	42
956a9202 RW	43	config XEN_PCIDEV_FRONTEND
	44	tristate "Xen PCI Frontend"
	45	depends on PCI && X86 && XEN
	46	select HOTPLUG
	47	select PCI_XEN
fce263c1	48	select XEN_XENBUS_FRONTEND
956a9202 RW	49	default y
	50	help
	51	The PCI device frontend driver allows the kernel to import arbitrary
	52	PCI devices from a PCI backend to support PCI driver domains.
	53
8b955b0d EB	54	config HT_IRQ
	55	bool "Interrupts on hypertransport devices"
	56	default y
fbab41cc	57	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
8b955b0d EB	58	help
	59	This allows native hypertransport devices to use interrupts.
	60
	61	If unsure say Y.
d1b054da	62
db3c33c6 JR	63	config PCI_ATS
	64	bool
	65
d1b054da YZ	66	config PCI_IOV
	67	bool "PCI IOV support"
	68	depends on PCI
db3c33c6	69	select PCI_ATS
d1b054da YZ	70	help
	71	I/O Virtualization is a PCI feature supported by some devices
	72	which allows them to create virtual devices which share their
	73	physical resources.
	74
	75	If unsure, say N.
204d49a5	76
c320b976 JR	77	config PCI_PRI
c320b976 JR	78	bool "PCI PRI support"
c54420d3	79	depends on PCI
c320b976 JR	80	select PCI_ATS
	81	help
	82	PRI is the PCI Page Request Interface. It allows PCI devices that are
	83	behind an IOMMU to recover from page faults.
	84
	85	If unsure, say N.
	86
086ac11f JR	87	config PCI_PASID
	88	bool "PCI PASID support"
	89	depends on PCI
	90	select PCI_ATS
	91	help
	92	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	93	to access more than one IO address space at the same time. To make
	94	use of this feature an IOMMU is required which also supports PASIDs.
	95	Select this option if you have such an IOMMU and want to compile the
	96	driver for it into your kernel.
	97
	98	If unsure, say N.
	99
204d49a5	100	config PCI_IOAPIC
b95a7bd7	101	tristate "PCI IO-APIC hotplug support" if X86
204d49a5 BH	102	depends on PCI
	103	depends on ACPI
	104	depends on HOTPLUG
b95a7bd7	105	default !X86
6058989b	106
8a226e00 RD	107	config PCI_LABEL
	108	def_bool y if (DMI \|\| ACPI)
	109	select NLS