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

#
# PCI configuration
#
config ARCH_SUPPORTS_MSI
	bool

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_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 && 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
	default !X86

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	#
f282b970 DW	4	config ARCH_SUPPORTS_MSI
f282b970 DW	5	bool
f282b970	6
1da177e4 LT	7	config PCI_MSI
	8	bool "Message Signaled Interrupts (MSI and MSI-X)"
	9	depends on PCI
f282b970	10	depends on ARCH_SUPPORTS_MSI
1da177e4 LT	11	help
	12	This allows device drivers to enable MSI (Message Signaled
	13	Interrupts). Message Signaled Interrupts enable a device to
	14	generate an interrupt using an inbound Memory Write on its
	15	PCI bus instead of asserting a device IRQ pin.
	16
309e57df MW	17	Use of PCI MSI interrupts can be disabled at kernel boot time
	18	by using the 'pci=nomsi' option. This disables MSI for the
	19	entire system.
	20
3196180a	21	If you don't know what to do here, say Y.
1da177e4	22
1da177e4 LT	23	config PCI_DEBUG
	24	bool "PCI Debugging"
	25	depends on PCI && DEBUG_KERNEL
	26	help
	27	Say Y here if you want the PCI core to produce a bunch of debug
	28	messages to the system log. Select this if you are having a
	29	problem with PCI support and want to see more of what is going on.
	30
	31	When in doubt, say N.
	32
b07f2ebc YL	33	config PCI_REALLOC_ENABLE_AUTO
	34	bool "Enable PCI resource re-allocation detection"
	35	depends on PCI
	36	help
	37	Say Y here if you want the PCI core to detect if PCI resource
	38	re-allocation needs to be enabled. You can always use pci=realloc=on
	39	or pci=realloc=off to override it. Note this feature is a no-op
	40	unless PCI_IOV support is also enabled; in that case it will
	41	automatically re-allocate PCI resources if SR-IOV BARs have not
	42	been allocated by the BIOS.
	43
	44	When in doubt, say N.
	45
c70e0d9d CW	46	config PCI_STUB
	47	tristate "PCI Stub driver"
	48	depends on PCI
	49	help
	50	Say Y or M here if you want be able to reserve a PCI device
	51	when it is going to be assigned to a guest operating system.
	52
	53	When in doubt, say N.
	54
956a9202 RW	55	config XEN_PCIDEV_FRONTEND
	56	tristate "Xen PCI Frontend"
	57	depends on PCI && X86 && XEN
956a9202	58	select PCI_XEN
fce263c1	59	select XEN_XENBUS_FRONTEND
956a9202 RW	60	default y
	61	help
	62	The PCI device frontend driver allows the kernel to import arbitrary
	63	PCI devices from a PCI backend to support PCI driver domains.
	64
8b955b0d EB	65	config HT_IRQ
	66	bool "Interrupts on hypertransport devices"
	67	default y
fbab41cc	68	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
8b955b0d EB	69	help
	70	This allows native hypertransport devices to use interrupts.
	71
	72	If unsure say Y.
d1b054da	73
db3c33c6 JR	74	config PCI_ATS
	75	bool
	76
d1b054da YZ	77	config PCI_IOV
	78	bool "PCI IOV support"
	79	depends on PCI
db3c33c6	80	select PCI_ATS
d1b054da YZ	81	help
	82	I/O Virtualization is a PCI feature supported by some devices
	83	which allows them to create virtual devices which share their
	84	physical resources.
	85
	86	If unsure, say N.
204d49a5	87
c320b976 JR	88	config PCI_PRI
c320b976 JR	89	bool "PCI PRI support"
c54420d3	90	depends on PCI
c320b976 JR	91	select PCI_ATS
	92	help
	93	PRI is the PCI Page Request Interface. It allows PCI devices that are
	94	behind an IOMMU to recover from page faults.
	95
	96	If unsure, say N.
	97
086ac11f JR	98	config PCI_PASID
	99	bool "PCI PASID support"
	100	depends on PCI
	101	select PCI_ATS
	102	help
	103	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	104	to access more than one IO address space at the same time. To make
	105	use of this feature an IOMMU is required which also supports PASIDs.
	106	Select this option if you have such an IOMMU and want to compile the
	107	driver for it into your kernel.
	108
	109	If unsure, say N.
	110
204d49a5	111	config PCI_IOAPIC
b95a7bd7	112	tristate "PCI IO-APIC hotplug support" if X86
204d49a5 BH	113	depends on PCI
204d49a5 BH	114	depends on ACPI
b95a7bd7	115	default !X86
6058989b	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"