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

#
# PCI configuration
#
config PCI_MSI
	bool "Message Signaled Interrupts (MSI and MSI-X)"
	depends on PCI
	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
	bool "PCI IO-APIC hotplug support" if X86
	depends on PCI
	depends on ACPI
	depends on X86_IO_APIC
	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	#
	4	config PCI_MSI
	5	bool "Message Signaled Interrupts (MSI and MSI-X)"
	6	depends on PCI
1da177e4 LT	7	help
	8	This allows device drivers to enable MSI (Message Signaled
	9	Interrupts). Message Signaled Interrupts enable a device to
	10	generate an interrupt using an inbound Memory Write on its
	11	PCI bus instead of asserting a device IRQ pin.
	12
309e57df MW	13	Use of PCI MSI interrupts can be disabled at kernel boot time
	14	by using the 'pci=nomsi' option. This disables MSI for the
	15	entire system.
	16
3196180a	17	If you don't know what to do here, say Y.
1da177e4	18
1da177e4 LT	19	config PCI_DEBUG
	20	bool "PCI Debugging"
	21	depends on PCI && DEBUG_KERNEL
	22	help
	23	Say Y here if you want the PCI core to produce a bunch of debug
	24	messages to the system log. Select this if you are having a
	25	problem with PCI support and want to see more of what is going on.
	26
	27	When in doubt, say N.
	28
b07f2ebc YL	29	config PCI_REALLOC_ENABLE_AUTO
	30	bool "Enable PCI resource re-allocation detection"
	31	depends on PCI
	32	help
	33	Say Y here if you want the PCI core to detect if PCI resource
	34	re-allocation needs to be enabled. You can always use pci=realloc=on
	35	or pci=realloc=off to override it. Note this feature is a no-op
	36	unless PCI_IOV support is also enabled; in that case it will
	37	automatically re-allocate PCI resources if SR-IOV BARs have not
	38	been allocated by the BIOS.
	39
	40	When in doubt, say N.
	41
c70e0d9d CW	42	config PCI_STUB
	43	tristate "PCI Stub driver"
	44	depends on PCI
	45	help
	46	Say Y or M here if you want be able to reserve a PCI device
	47	when it is going to be assigned to a guest operating system.
	48
	49	When in doubt, say N.
	50
956a9202 RW	51	config XEN_PCIDEV_FRONTEND
	52	tristate "Xen PCI Frontend"
	53	depends on PCI && X86 && XEN
956a9202	54	select PCI_XEN
fce263c1	55	select XEN_XENBUS_FRONTEND
956a9202 RW	56	default y
	57	help
	58	The PCI device frontend driver allows the kernel to import arbitrary
	59	PCI devices from a PCI backend to support PCI driver domains.
	60
8b955b0d EB	61	config HT_IRQ
	62	bool "Interrupts on hypertransport devices"
	63	default y
fbab41cc	64	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
8b955b0d EB	65	help
	66	This allows native hypertransport devices to use interrupts.
	67
	68	If unsure say Y.
d1b054da	69
db3c33c6 JR	70	config PCI_ATS
	71	bool
	72
d1b054da YZ	73	config PCI_IOV
	74	bool "PCI IOV support"
	75	depends on PCI
db3c33c6	76	select PCI_ATS
d1b054da YZ	77	help
	78	I/O Virtualization is a PCI feature supported by some devices
	79	which allows them to create virtual devices which share their
	80	physical resources.
	81
	82	If unsure, say N.
204d49a5	83
c320b976 JR	84	config PCI_PRI
c320b976 JR	85	bool "PCI PRI support"
c54420d3	86	depends on PCI
c320b976 JR	87	select PCI_ATS
	88	help
	89	PRI is the PCI Page Request Interface. It allows PCI devices that are
	90	behind an IOMMU to recover from page faults.
	91
	92	If unsure, say N.
	93
086ac11f JR	94	config PCI_PASID
	95	bool "PCI PASID support"
	96	depends on PCI
	97	select PCI_ATS
	98	help
	99	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	100	to access more than one IO address space at the same time. To make
	101	use of this feature an IOMMU is required which also supports PASIDs.
	102	Select this option if you have such an IOMMU and want to compile the
	103	driver for it into your kernel.
	104
	105	If unsure, say N.
	106
204d49a5	107	config PCI_IOAPIC
77410439	108	bool "PCI IO-APIC hotplug support" if X86
204d49a5 BH	109	depends on PCI
204d49a5 BH	110	depends on ACPI
77410439	111	depends on X86_IO_APIC
b95a7bd7	112	default !X86
6058989b	113
8a226e00 RD	114	config PCI_LABEL
	115	def_bool y if (DMI \|\| ACPI)
	116	select NLS
45361a4f TP	117
45361a4f TP	118	source "drivers/pci/host/Kconfig"