xref: /openbmc/linux/drivers/pci/Kconfig (revision f87deada) 
1# SPDX-License-Identifier: GPL-2.0
2#
3# PCI configuration
4#
5
6source "drivers/pci/pcie/Kconfig"
7
8config PCI_BUS_ADDR_T_64BIT
9	def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
10	depends on PCI
11
12config PCI_MSI
13	bool "Message Signaled Interrupts (MSI and MSI-X)"
14	depends on PCI
15	select GENERIC_MSI_IRQ
16	help
17	   This allows device drivers to enable MSI (Message Signaled
18	   Interrupts).  Message Signaled Interrupts enable a device to
19	   generate an interrupt using an inbound Memory Write on its
20	   PCI bus instead of asserting a device IRQ pin.
21
22	   Use of PCI MSI interrupts can be disabled at kernel boot time
23	   by using the 'pci=nomsi' option.  This disables MSI for the
24	   entire system.
25
26	   If you don't know what to do here, say Y.
27
28config PCI_MSI_IRQ_DOMAIN
29	def_bool ARC || ARM || ARM64 || X86
30	depends on PCI_MSI
31	select GENERIC_MSI_IRQ_DOMAIN
32
33config PCI_QUIRKS
34	default y
35	bool "Enable PCI quirk workarounds" if EXPERT
36	depends on PCI
37	help
38	  This enables workarounds for various PCI chipset bugs/quirks.
39	  Disable this only if your target machine is unaffected by PCI
40	  quirks.
41
42config PCI_DEBUG
43	bool "PCI Debugging"
44	depends on PCI && DEBUG_KERNEL
45	help
46	  Say Y here if you want the PCI core to produce a bunch of debug
47	  messages to the system log.  Select this if you are having a
48	  problem with PCI support and want to see more of what is going on.
49
50	  When in doubt, say N.
51
52config PCI_REALLOC_ENABLE_AUTO
53	bool "Enable PCI resource re-allocation detection"
54	depends on PCI
55	depends on PCI_IOV
56	help
57	  Say Y here if you want the PCI core to detect if PCI resource
58	  re-allocation needs to be enabled. You can always use pci=realloc=on
59	  or pci=realloc=off to override it.  It will automatically
60	  re-allocate PCI resources if SR-IOV BARs have not been allocated by
61	  the BIOS.
62
63	  When in doubt, say N.
64
65config PCI_STUB
66	tristate "PCI Stub driver"
67	depends on PCI
68	help
69	  Say Y or M here if you want be able to reserve a PCI device
70	  when it is going to be assigned to a guest operating system.
71
72	  When in doubt, say N.
73
74config XEN_PCIDEV_FRONTEND
75        tristate "Xen PCI Frontend"
76        depends on PCI && X86 && XEN
77        select PCI_XEN
78	select XEN_XENBUS_FRONTEND
79        default y
80        help
81          The PCI device frontend driver allows the kernel to import arbitrary
82          PCI devices from a PCI backend to support PCI driver domains.
83
84config PCI_ATS
85	bool
86
87config PCI_ECAM
88	bool
89
90config PCI_LOCKLESS_CONFIG
91	bool
92
93config PCI_IOV
94	bool "PCI IOV support"
95	depends on PCI
96	select PCI_ATS
97	help
98	  I/O Virtualization is a PCI feature supported by some devices
99	  which allows them to create virtual devices which share their
100	  physical resources.
101
102	  If unsure, say N.
103
104config PCI_PRI
105	bool "PCI PRI support"
106	depends on PCI
107	select PCI_ATS
108	help
109	  PRI is the PCI Page Request Interface. It allows PCI devices that are
110	  behind an IOMMU to recover from page faults.
111
112	  If unsure, say N.
113
114config PCI_PASID
115	bool "PCI PASID support"
116	depends on PCI
117	select PCI_ATS
118	help
119	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
120	  to access more than one IO address space at the same time. To make
121	  use of this feature an IOMMU is required which also supports PASIDs.
122	  Select this option if you have such an IOMMU and want to compile the
123	  driver for it into your kernel.
124
125	  If unsure, say N.
126
127config PCI_LABEL
128	def_bool y if (DMI || ACPI)
129	depends on PCI
130	select NLS
131
132config PCI_HYPERV
133        tristate "Hyper-V PCI Frontend"
134        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
135        help
136          The PCI device frontend driver allows the kernel to import arbitrary
137          PCI devices from a PCI backend to support PCI driver domains.
138
139source "drivers/pci/hotplug/Kconfig"
140source "drivers/pci/cadence/Kconfig"
141source "drivers/pci/dwc/Kconfig"
142source "drivers/pci/host/Kconfig"
143source "drivers/pci/endpoint/Kconfig"
144source "drivers/pci/switch/Kconfig"
145