[mirror_ubuntu-zesty-kernel.git] / drivers / pci / Kconfig

#
# PCI configuration
#

source "drivers/pci/pcie/Kconfig"

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
	def_bool ARC || ARM || ARM64 || X86
	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_ECAM
	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

config PCI_HYPERV
        tristate "Hyper-V PCI Frontend"
        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
        help
          The PCI device frontend driver allows the kernel to import arbitrary
          PCI devices from a PCI backend to support PCI driver domains.

source "drivers/pci/hotplug/Kconfig"
source "drivers/pci/host/Kconfig"
Commit	Line	Data
1da177e4 LT	1	#
	2	# PCI configuration
	3	#
5f8fc432 BS	4
	5	source "drivers/pci/pcie/Kconfig"
	6
3a9ad0b4	7	config PCI_BUS_ADDR_T_64BIT
e02a653e	8	def_bool y if (ARCH_DMA_ADDR_T_64BIT \|\| 64BIT)
3a9ad0b4 YL	9	depends on PCI
3a9ad0b4 YL	10
1da177e4 LT	11	config PCI_MSI
	12	bool "Message Signaled Interrupts (MSI and MSI-X)"
	13	depends on PCI
38b6a1cf	14	select GENERIC_MSI_IRQ
1da177e4 LT	15	help
	16	This allows device drivers to enable MSI (Message Signaled
	17	Interrupts). Message Signaled Interrupts enable a device to
	18	generate an interrupt using an inbound Memory Write on its
	19	PCI bus instead of asserting a device IRQ pin.
	20
309e57df MW	21	Use of PCI MSI interrupts can be disabled at kernel boot time
	22	by using the 'pci=nomsi' option. This disables MSI for the
	23	entire system.
	24
3196180a	25	If you don't know what to do here, say Y.
1da177e4	26
3878eaef	27	config PCI_MSI_IRQ_DOMAIN
f8430eae	28	def_bool ARC \|\| ARM \|\| ARM64 \|\| X86
3878eaef JL	29	depends on PCI_MSI
	30	select GENERIC_MSI_IRQ_DOMAIN
	31
1da177e4 LT	32	config PCI_DEBUG
	33	bool "PCI Debugging"
	34	depends on PCI && DEBUG_KERNEL
	35	help
	36	Say Y here if you want the PCI core to produce a bunch of debug
	37	messages to the system log. Select this if you are having a
	38	problem with PCI support and want to see more of what is going on.
	39
	40	When in doubt, say N.
	41
b07f2ebc YL	42	config PCI_REALLOC_ENABLE_AUTO
	43	bool "Enable PCI resource re-allocation detection"
	44	depends on PCI
	45	help
	46	Say Y here if you want the PCI core to detect if PCI resource
	47	re-allocation needs to be enabled. You can always use pci=realloc=on
	48	or pci=realloc=off to override it. Note this feature is a no-op
	49	unless PCI_IOV support is also enabled; in that case it will
	50	automatically re-allocate PCI resources if SR-IOV BARs have not
	51	been allocated by the BIOS.
	52
	53	When in doubt, say N.
	54
c70e0d9d CW	55	config PCI_STUB
	56	tristate "PCI Stub driver"
	57	depends on PCI
	58	help
	59	Say Y or M here if you want be able to reserve a PCI device
	60	when it is going to be assigned to a guest operating system.
	61
	62	When in doubt, say N.
	63
956a9202 RW	64	config XEN_PCIDEV_FRONTEND
	65	tristate "Xen PCI Frontend"
	66	depends on PCI && X86 && XEN
956a9202	67	select PCI_XEN
fce263c1	68	select XEN_XENBUS_FRONTEND
956a9202 RW	69	default y
	70	help
	71	The PCI device frontend driver allows the kernel to import arbitrary
	72	PCI devices from a PCI backend to support PCI driver domains.
	73
8b955b0d EB	74	config HT_IRQ
	75	bool "Interrupts on hypertransport devices"
	76	default y
2f600025	77	depends on PCI && X86_LOCAL_APIC
8b955b0d EB	78	help
	79	This allows native hypertransport devices to use interrupts.
	80
	81	If unsure say Y.
d1b054da	82
db3c33c6 JR	83	config PCI_ATS
	84	bool
	85
35ff9477 J	86	config PCI_ECAM
	87	bool
	88
d1b054da YZ	89	config PCI_IOV
	90	bool "PCI IOV support"
	91	depends on PCI
db3c33c6	92	select PCI_ATS
d1b054da YZ	93	help
	94	I/O Virtualization is a PCI feature supported by some devices
	95	which allows them to create virtual devices which share their
	96	physical resources.
	97
	98	If unsure, say N.
204d49a5	99
c320b976 JR	100	config PCI_PRI
c320b976 JR	101	bool "PCI PRI support"
c54420d3	102	depends on PCI
c320b976 JR	103	select PCI_ATS
	104	help
	105	PRI is the PCI Page Request Interface. It allows PCI devices that are
	106	behind an IOMMU to recover from page faults.
	107
	108	If unsure, say N.
	109
086ac11f JR	110	config PCI_PASID
	111	bool "PCI PASID support"
	112	depends on PCI
	113	select PCI_ATS
	114	help
	115	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	116	to access more than one IO address space at the same time. To make
	117	use of this feature an IOMMU is required which also supports PASIDs.
	118	Select this option if you have such an IOMMU and want to compile the
	119	driver for it into your kernel.
	120
	121	If unsure, say N.
	122
8a226e00 RD	123	config PCI_LABEL
	124	def_bool y if (DMI \|\| ACPI)
	125	select NLS
45361a4f	126
4daace0d JO	127	config PCI_HYPERV
	128	tristate "Hyper-V PCI Frontend"
	129	depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
	130	help
	131	The PCI device frontend driver allows the kernel to import arbitrary
	132	PCI devices from a PCI backend to support PCI driver domains.
	133
30b5b880	134	source "drivers/pci/hotplug/Kconfig"
45361a4f	135	source "drivers/pci/host/Kconfig"