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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"