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

# SPDX-License-Identifier: GPL-2.0
#
# PCI configuration
#

source "drivers/pci/pcie/Kconfig"

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_QUIRKS
	default y
	bool "Enable PCI quirk workarounds" if EXPERT
	depends on PCI
	help
	  This enables workarounds for various PCI chipset bugs/quirks.
	  Disable this only if your target machine is unaffected by PCI
	  quirks.

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
	depends on PCI_IOV
	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.  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 PCI_PF_STUB
	tristate "PCI PF Stub driver"
	depends on PCI
	depends on PCI_IOV
	help
	  Say Y or M here if you want to enable support for devices that
	  require SR-IOV support, while at the same time the PF itself is
	  not providing any actual services on the host itself such as
	  storage or networking.

	  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 PCI_ATS
	bool

config PCI_ECAM
	bool

config PCI_LOCKLESS_CONFIG
	bool

config PCI_BRIDGE_EMUL
	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_P2PDMA
	bool "PCI peer-to-peer transfer support"
	depends on PCI && ZONE_DEVICE
	select GENERIC_ALLOCATOR
	help
	  Enableѕ drivers to do PCI peer-to-peer transactions to and from
	  BARs that are exposed in other devices that are the part of
	  the hierarchy where peer-to-peer DMA is guaranteed by the PCI
	  specification to work (ie. anything below a single PCI bridge).

	  Many PCIe root complexes do not support P2P transactions and
	  it's hard to tell which support it at all, so at this time,
	  P2P DMA transations must be between devices behind the same root
	  port.

	  If unsure, say N.

config PCI_LABEL
	def_bool y if (DMI || ACPI)
	depends on PCI
	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/controller/Kconfig"
source "drivers/pci/endpoint/Kconfig"
source "drivers/pci/switch/Kconfig"
Commit	Line	Data
7328c8f4	1	# SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	#
	3	# PCI configuration
	4	#
5f8fc432 BS	5
	6	source "drivers/pci/pcie/Kconfig"
	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	24	config PCI_MSI_IRQ_DOMAIN
f8430eae	25	def_bool ARC \|\| ARM \|\| ARM64 \|\| X86
3878eaef JL	26	depends on PCI_MSI
	27	select GENERIC_MSI_IRQ_DOMAIN
	28
03ea2263 RD	29	config PCI_QUIRKS
	30	default y
	31	bool "Enable PCI quirk workarounds" if EXPERT
	32	depends on PCI
	33	help
	34	This enables workarounds for various PCI chipset bugs/quirks.
	35	Disable this only if your target machine is unaffected by PCI
	36	quirks.
	37
1da177e4 LT	38	config PCI_DEBUG
	39	bool "PCI Debugging"
	40	depends on PCI && DEBUG_KERNEL
	41	help
	42	Say Y here if you want the PCI core to produce a bunch of debug
	43	messages to the system log. Select this if you are having a
	44	problem with PCI support and want to see more of what is going on.
	45
	46	When in doubt, say N.
	47
b07f2ebc YL	48	config PCI_REALLOC_ENABLE_AUTO
	49	bool "Enable PCI resource re-allocation detection"
	50	depends on PCI
ad581f86	51	depends on PCI_IOV
b07f2ebc YL	52	help
	53	Say Y here if you want the PCI core to detect if PCI resource
	54	re-allocation needs to be enabled. You can always use pci=realloc=on
ad581f86 SES	55	or pci=realloc=off to override it. It will automatically
	56	re-allocate PCI resources if SR-IOV BARs have not been allocated by
	57	the BIOS.
b07f2ebc YL	58
	59	When in doubt, say N.
	60
c70e0d9d CW	61	config PCI_STUB
	62	tristate "PCI Stub driver"
	63	depends on PCI
	64	help
	65	Say Y or M here if you want be able to reserve a PCI device
	66	when it is going to be assigned to a guest operating system.
	67
	68	When in doubt, say N.
	69
a8ccf8a6 AD	70	config PCI_PF_STUB
	71	tristate "PCI PF Stub driver"
	72	depends on PCI
	73	depends on PCI_IOV
	74	help
	75	Say Y or M here if you want to enable support for devices that
	76	require SR-IOV support, while at the same time the PF itself is
	77	not providing any actual services on the host itself such as
	78	storage or networking.
	79
	80	When in doubt, say N.
	81
956a9202 RW	82	config XEN_PCIDEV_FRONTEND
	83	tristate "Xen PCI Frontend"
	84	depends on PCI && X86 && XEN
956a9202	85	select PCI_XEN
fce263c1	86	select XEN_XENBUS_FRONTEND
956a9202 RW	87	default y
	88	help
	89	The PCI device frontend driver allows the kernel to import arbitrary
	90	PCI devices from a PCI backend to support PCI driver domains.
	91
db3c33c6 JR	92	config PCI_ATS
	93	bool
	94
35ff9477 J	95	config PCI_ECAM
	96	bool
	97
714fe383 TG	98	config PCI_LOCKLESS_CONFIG
	99	bool
	100
23a5fba4 TP	101	config PCI_BRIDGE_EMUL
23a5fba4 TP	102	bool
714fe383	103
d1b054da YZ	104	config PCI_IOV
	105	bool "PCI IOV support"
	106	depends on PCI
db3c33c6	107	select PCI_ATS
d1b054da YZ	108	help
	109	I/O Virtualization is a PCI feature supported by some devices
	110	which allows them to create virtual devices which share their
	111	physical resources.
	112
	113	If unsure, say N.
204d49a5	114
c320b976 JR	115	config PCI_PRI
c320b976 JR	116	bool "PCI PRI support"
c54420d3	117	depends on PCI
c320b976 JR	118	select PCI_ATS
	119	help
	120	PRI is the PCI Page Request Interface. It allows PCI devices that are
	121	behind an IOMMU to recover from page faults.
	122
	123	If unsure, say N.
	124
086ac11f JR	125	config PCI_PASID
	126	bool "PCI PASID support"
	127	depends on PCI
	128	select PCI_ATS
	129	help
	130	Process Address Space Identifiers (PASIDs) can be used by PCI devices
	131	to access more than one IO address space at the same time. To make
	132	use of this feature an IOMMU is required which also supports PASIDs.
	133	Select this option if you have such an IOMMU and want to compile the
	134	driver for it into your kernel.
	135
	136	If unsure, say N.
	137
52916982 LG	138	config PCI_P2PDMA
	139	bool "PCI peer-to-peer transfer support"
	140	depends on PCI && ZONE_DEVICE
	141	select GENERIC_ALLOCATOR
	142	help
	143	Enableѕ drivers to do PCI peer-to-peer transactions to and from
	144	BARs that are exposed in other devices that are the part of
	145	the hierarchy where peer-to-peer DMA is guaranteed by the PCI
	146	specification to work (ie. anything below a single PCI bridge).
	147
	148	Many PCIe root complexes do not support P2P transactions and
	149	it's hard to tell which support it at all, so at this time,
	150	P2P DMA transations must be between devices behind the same root
	151	port.
	152
	153	If unsure, say N.
	154
8a226e00 RD	155	config PCI_LABEL
8a226e00 RD	156	def_bool y if (DMI \|\| ACPI)
9de0eec2	157	depends on PCI
8a226e00	158	select NLS
45361a4f	159
4daace0d JO	160	config PCI_HYPERV
	161	tristate "Hyper-V PCI Frontend"
	162	depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
	163	help
	164	The PCI device frontend driver allows the kernel to import arbitrary
	165	PCI devices from a PCI backend to support PCI driver domains.
	166
30b5b880	167	source "drivers/pci/hotplug/Kconfig"
6e0832fa	168	source "drivers/pci/controller/Kconfig"
5e8cb403	169	source "drivers/pci/endpoint/Kconfig"
080b47de	170	source "drivers/pci/switch/Kconfig"