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

#
# PCI configuration
#
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_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
38b6a1cf	7	select GENERIC_MSI_IRQ
1da177e4 LT	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
3196180a	18	If you don't know what to do here, say Y.
1da177e4	19
1da177e4 LT	20	config PCI_DEBUG
	21	bool "PCI Debugging"
	22	depends on PCI && DEBUG_KERNEL
	23	help
	24	Say Y here if you want the PCI core to produce a bunch of debug
	25	messages to the system log. Select this if you are having a
	26	problem with PCI support and want to see more of what is going on.
	27
	28	When in doubt, say N.
	29
b07f2ebc YL	30	config PCI_REALLOC_ENABLE_AUTO
	31	bool "Enable PCI resource re-allocation detection"
	32	depends on PCI
	33	help
	34	Say Y here if you want the PCI core to detect if PCI resource
	35	re-allocation needs to be enabled. You can always use pci=realloc=on
	36	or pci=realloc=off to override it. Note this feature is a no-op
	37	unless PCI_IOV support is also enabled; in that case it will
	38	automatically re-allocate PCI resources if SR-IOV BARs have not
	39	been allocated by the BIOS.
	40
	41	When in doubt, say N.
	42
c70e0d9d CW	43	config PCI_STUB
	44	tristate "PCI Stub driver"
	45	depends on PCI
	46	help
	47	Say Y or M here if you want be able to reserve a PCI device
	48	when it is going to be assigned to a guest operating system.
	49
	50	When in doubt, say N.
	51
956a9202 RW	52	config XEN_PCIDEV_FRONTEND
	53	tristate "Xen PCI Frontend"
	54	depends on PCI && X86 && XEN
956a9202	55	select PCI_XEN
fce263c1	56	select XEN_XENBUS_FRONTEND
956a9202 RW	57	default y
	58	help
	59	The PCI device frontend driver allows the kernel to import arbitrary
	60	PCI devices from a PCI backend to support PCI driver domains.
	61
8b955b0d EB	62	config HT_IRQ
	63	bool "Interrupts on hypertransport devices"
	64	default y
fbab41cc	65	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
8b955b0d EB	66	help
	67	This allows native hypertransport devices to use interrupts.
	68
	69	If unsure say Y.
d1b054da	70
db3c33c6 JR	71	config PCI_ATS
	72	bool
	73
d1b054da YZ	74	config PCI_IOV
	75	bool "PCI IOV support"
	76	depends on PCI
db3c33c6	77	select PCI_ATS
d1b054da YZ	78	help
	79	I/O Virtualization is a PCI feature supported by some devices
	80	which allows them to create virtual devices which share their
	81	physical resources.
	82
	83	If unsure, say N.
204d49a5	84
c320b976 JR	85	config PCI_PRI
c320b976 JR	86	bool "PCI PRI support"
c54420d3	87	depends on PCI
c320b976 JR	88	select PCI_ATS
	89	help
	90	PRI is the PCI Page Request Interface. It allows PCI devices that are
	91	behind an IOMMU to recover from page faults.
	92
	93	If unsure, say N.
	94
086ac11f JR	95	config PCI_PASID
	96	bool "PCI PASID support"
	97	depends on PCI
	98	select PCI_ATS
	99	help
	100	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	101	to access more than one IO address space at the same time. To make
	102	use of this feature an IOMMU is required which also supports PASIDs.
	103	Select this option if you have such an IOMMU and want to compile the
	104	driver for it into your kernel.
	105
	106	If unsure, say N.
	107
204d49a5	108	config PCI_IOAPIC
77410439	109	bool "PCI IO-APIC hotplug support" if X86
204d49a5 BH	110	depends on PCI
204d49a5 BH	111	depends on ACPI
77410439	112	depends on X86_IO_APIC
b95a7bd7	113	default !X86
6058989b	114
8a226e00 RD	115	config PCI_LABEL
	116	def_bool y if (DMI \|\| ACPI)
	117	select NLS
45361a4f TP	118
45361a4f TP	119	source "drivers/pci/host/Kconfig"