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1# SPDX-License-Identifier: GPL-2.0
2#
3# PCI configuration
4#
5
6# select this to offer the PCI prompt
7config HAVE_PCI
8 bool
9
10# select this to unconditionally force on PCI support
11config FORCE_PCI
12 bool
13 select HAVE_PCI
14 select PCI
15
16menuconfig PCI
17 bool "PCI support"
18 depends on HAVE_PCI
19 help
20 This option enables support for the PCI local bus, including
21 support for PCI-X and the foundations for PCI Express support.
22 Say 'Y' here unless you know what you are doing.
23
24if PCI
25
26config PCI_DOMAINS
27 bool
28 depends on PCI
29
30config PCI_DOMAINS_GENERIC
31 bool
32 select PCI_DOMAINS
33
34config PCI_SYSCALL
35 bool
36
37source "drivers/pci/pcie/Kconfig"
38
39config PCI_MSI
40 bool "Message Signaled Interrupts (MSI and MSI-X)"
41 select GENERIC_MSI_IRQ
42 help
43 This allows device drivers to enable MSI (Message Signaled
44 Interrupts). Message Signaled Interrupts enable a device to
45 generate an interrupt using an inbound Memory Write on its
46 PCI bus instead of asserting a device IRQ pin.
47
48 Use of PCI MSI interrupts can be disabled at kernel boot time
49 by using the 'pci=nomsi' option. This disables MSI for the
50 entire system.
51
52 If you don't know what to do here, say Y.
53
54config PCI_MSI_IRQ_DOMAIN
55 def_bool ARC || ARM || ARM64 || X86 || RISCV
56 depends on PCI_MSI
57 select GENERIC_MSI_IRQ_DOMAIN
58
59config PCI_QUIRKS
60 default y
61 bool "Enable PCI quirk workarounds" if EXPERT
62 help
63 This enables workarounds for various PCI chipset bugs/quirks.
64 Disable this only if your target machine is unaffected by PCI
65 quirks.
66
67config PCI_DEBUG
68 bool "PCI Debugging"
69 depends on DEBUG_KERNEL
70 help
71 Say Y here if you want the PCI core to produce a bunch of debug
72 messages to the system log. Select this if you are having a
73 problem with PCI support and want to see more of what is going on.
74
75 When in doubt, say N.
76
77config PCI_REALLOC_ENABLE_AUTO
78 bool "Enable PCI resource re-allocation detection"
79 depends on PCI_IOV
80 help
81 Say Y here if you want the PCI core to detect if PCI resource
82 re-allocation needs to be enabled. You can always use pci=realloc=on
83 or pci=realloc=off to override it. It will automatically
84 re-allocate PCI resources if SR-IOV BARs have not been allocated by
85 the BIOS.
86
87 When in doubt, say N.
88
89config PCI_STUB
90 tristate "PCI Stub driver"
91 help
92 Say Y or M here if you want be able to reserve a PCI device
93 when it is going to be assigned to a guest operating system.
94
95 When in doubt, say N.
96
97config PCI_PF_STUB
98 tristate "PCI PF Stub driver"
99 depends on PCI_IOV
100 help
101 Say Y or M here if you want to enable support for devices that
102 require SR-IOV support, while at the same time the PF (Physical
103 Function) itself is not providing any actual services on the
104 host itself such as storage or networking.
105
106 When in doubt, say N.
107
108config XEN_PCIDEV_FRONTEND
109 tristate "Xen PCI Frontend"
110 depends on X86 && XEN
111 select PCI_XEN
112 select XEN_XENBUS_FRONTEND
113 default y
114 help
115 The PCI device frontend driver allows the kernel to import arbitrary
116 PCI devices from a PCI backend to support PCI driver domains.
117
118config PCI_ATS
119 bool
120
121config PCI_ECAM
122 bool
123
124config PCI_LOCKLESS_CONFIG
125 bool
126
127config PCI_BRIDGE_EMUL
128 bool
129
130config PCI_IOV
131 bool "PCI IOV support"
132 select PCI_ATS
133 help
134 I/O Virtualization is a PCI feature supported by some devices
135 which allows them to create virtual devices which share their
136 physical resources.
137
138 If unsure, say N.
139
140config PCI_PRI
141 bool "PCI PRI support"
142 select PCI_ATS
143 help
144 PRI is the PCI Page Request Interface. It allows PCI devices that are
145 behind an IOMMU to recover from page faults.
146
147 If unsure, say N.
148
149config PCI_PASID
150 bool "PCI PASID support"
151 select PCI_ATS
152 help
153 Process Address Space Identifiers (PASIDs) can be used by PCI devices
154 to access more than one IO address space at the same time. To make
155 use of this feature an IOMMU is required which also supports PASIDs.
156 Select this option if you have such an IOMMU and want to compile the
157 driver for it into your kernel.
158
159 If unsure, say N.
160
161config PCI_P2PDMA
162 bool "PCI peer-to-peer transfer support"
163 depends on ZONE_DEVICE
164 select GENERIC_ALLOCATOR
165 help
166 Enableѕ drivers to do PCI peer-to-peer transactions to and from
167 BARs that are exposed in other devices that are the part of
168 the hierarchy where peer-to-peer DMA is guaranteed by the PCI
169 specification to work (ie. anything below a single PCI bridge).
170
171 Many PCIe root complexes do not support P2P transactions and
172 it's hard to tell which support it at all, so at this time,
173 P2P DMA transactions must be between devices behind the same root
174 port.
175
176 If unsure, say N.
177
178config PCI_LABEL
179 def_bool y if (DMI || ACPI)
180 select NLS
181
182config PCI_HYPERV
183 tristate "Hyper-V PCI Frontend"
184 depends on X86_64 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && SYSFS
185 select PCI_HYPERV_INTERFACE
186 help
187 The PCI device frontend driver allows the kernel to import arbitrary
188 PCI devices from a PCI backend to support PCI driver domains.
189
190source "drivers/pci/hotplug/Kconfig"
191source "drivers/pci/controller/Kconfig"
192source "drivers/pci/endpoint/Kconfig"
193source "drivers/pci/switch/Kconfig"
194
195endif
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"