[linux-2.6-block.git] / drivers / pci / Kconfig

#
# PCI configuration
#
config PCI_BUS_ADDR_T_64BIT
	def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
	depends on PCI

config PCI_MSI
	bool "Message Signaled Interrupts (MSI and MSI-X)"
	depends on PCI
	select GENERIC_MSI_IRQ
	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_MSI_IRQ_DOMAIN
	bool
	depends on PCI_MSI
	select GENERIC_MSI_IRQ_DOMAIN

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_REALLOC_ENABLE_AUTO
	bool "Enable PCI resource re-allocation detection"
	depends on PCI
	help
	  Say Y here if you want the PCI core to detect if PCI resource
	  re-allocation needs to be enabled. You can always use pci=realloc=on
          or pci=realloc=off to override it.  Note this feature is a no-op
          unless PCI_IOV support is also enabled; in that case it will
          automatically re-allocate PCI resources if SR-IOV BARs have not
          been allocated by the BIOS.

	  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 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
	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_LABEL
	def_bool y if (DMI || ACPI)
	select NLS

source "drivers/pci/host/Kconfig"
Commit	Line	Data
1da177e4 LT	1	#
	2	# PCI configuration
	3	#
3a9ad0b4	4	config PCI_BUS_ADDR_T_64BIT
e02a653e	5	def_bool y if (ARCH_DMA_ADDR_T_64BIT \|\| 64BIT)
3a9ad0b4 YL	6	depends on PCI
3a9ad0b4 YL	7
1da177e4 LT	8	config PCI_MSI
	9	bool "Message Signaled Interrupts (MSI and MSI-X)"
	10	depends on PCI
38b6a1cf	11	select GENERIC_MSI_IRQ
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
3878eaef JL	24	config PCI_MSI_IRQ_DOMAIN
	25	bool
	26	depends on PCI_MSI
	27	select GENERIC_MSI_IRQ_DOMAIN
	28
1da177e4 LT	29	config PCI_DEBUG
	30	bool "PCI Debugging"
	31	depends on PCI && DEBUG_KERNEL
	32	help
	33	Say Y here if you want the PCI core to produce a bunch of debug
	34	messages to the system log. Select this if you are having a
	35	problem with PCI support and want to see more of what is going on.
	36
	37	When in doubt, say N.
	38
b07f2ebc YL	39	config PCI_REALLOC_ENABLE_AUTO
	40	bool "Enable PCI resource re-allocation detection"
	41	depends on PCI
	42	help
	43	Say Y here if you want the PCI core to detect if PCI resource
	44	re-allocation needs to be enabled. You can always use pci=realloc=on
	45	or pci=realloc=off to override it. Note this feature is a no-op
	46	unless PCI_IOV support is also enabled; in that case it will
	47	automatically re-allocate PCI resources if SR-IOV BARs have not
	48	been allocated by the BIOS.
	49
	50	When in doubt, say N.
	51
c70e0d9d CW	52	config PCI_STUB
	53	tristate "PCI Stub driver"
	54	depends on PCI
	55	help
	56	Say Y or M here if you want be able to reserve a PCI device
	57	when it is going to be assigned to a guest operating system.
	58
	59	When in doubt, say N.
	60
956a9202 RW	61	config XEN_PCIDEV_FRONTEND
	62	tristate "Xen PCI Frontend"
	63	depends on PCI && X86 && XEN
956a9202	64	select PCI_XEN
fce263c1	65	select XEN_XENBUS_FRONTEND
956a9202 RW	66	default y
	67	help
	68	The PCI device frontend driver allows the kernel to import arbitrary
	69	PCI devices from a PCI backend to support PCI driver domains.
	70
8b955b0d EB	71	config HT_IRQ
	72	bool "Interrupts on hypertransport devices"
	73	default y
2f600025	74	depends on PCI && X86_LOCAL_APIC
8b955b0d EB	75	help
	76	This allows native hypertransport devices to use interrupts.
	77
	78	If unsure say Y.
d1b054da	79
db3c33c6 JR	80	config PCI_ATS
	81	bool
	82
d1b054da YZ	83	config PCI_IOV
	84	bool "PCI IOV support"
	85	depends on PCI
db3c33c6	86	select PCI_ATS
d1b054da YZ	87	help
	88	I/O Virtualization is a PCI feature supported by some devices
	89	which allows them to create virtual devices which share their
	90	physical resources.
	91
	92	If unsure, say N.
204d49a5	93
c320b976 JR	94	config PCI_PRI
c320b976 JR	95	bool "PCI PRI support"
c54420d3	96	depends on PCI
c320b976 JR	97	select PCI_ATS
	98	help
	99	PRI is the PCI Page Request Interface. It allows PCI devices that are
	100	behind an IOMMU to recover from page faults.
	101
	102	If unsure, say N.
	103
086ac11f JR	104	config PCI_PASID
	105	bool "PCI PASID support"
	106	depends on PCI
	107	select PCI_ATS
	108	help
	109	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	110	to access more than one IO address space at the same time. To make
	111	use of this feature an IOMMU is required which also supports PASIDs.
	112	Select this option if you have such an IOMMU and want to compile the
	113	driver for it into your kernel.
	114
	115	If unsure, say N.
	116
8a226e00 RD	117	config PCI_LABEL
	118	def_bool y if (DMI \|\| ACPI)
	119	select NLS
45361a4f TP	120
45361a4f TP	121	source "drivers/pci/host/Kconfig"