1 # SPDX-License-Identifier: GPL-2.0
6 # select this to offer the PCI prompt
10 # select this to unconditionally force on PCI support
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.
28 config PCI_DOMAINS_GENERIC
33 source "drivers/pci/pcie/Kconfig"
36 bool "Message Signaled Interrupts (MSI and MSI-X)"
38 select GENERIC_MSI_IRQ
40 This allows device drivers to enable MSI (Message Signaled
41 Interrupts). Message Signaled Interrupts enable a device to
42 generate an interrupt using an inbound Memory Write on its
43 PCI bus instead of asserting a device IRQ pin.
45 Use of PCI MSI interrupts can be disabled at kernel boot time
46 by using the 'pci=nomsi' option. This disables MSI for the
49 If you don't know what to do here, say Y.
51 config PCI_MSI_IRQ_DOMAIN
52 def_bool ARC || ARM || ARM64 || X86
54 select GENERIC_MSI_IRQ_DOMAIN
58 bool "Enable PCI quirk workarounds" if EXPERT
61 This enables workarounds for various PCI chipset bugs/quirks.
62 Disable this only if your target machine is unaffected by PCI
67 depends on PCI && DEBUG_KERNEL
69 Say Y here if you want the PCI core to produce a bunch of debug
70 messages to the system log. Select this if you are having a
71 problem with PCI support and want to see more of what is going on.
75 config PCI_REALLOC_ENABLE_AUTO
76 bool "Enable PCI resource re-allocation detection"
80 Say Y here if you want the PCI core to detect if PCI resource
81 re-allocation needs to be enabled. You can always use pci=realloc=on
82 or pci=realloc=off to override it. It will automatically
83 re-allocate PCI resources if SR-IOV BARs have not been allocated by
89 tristate "PCI Stub driver"
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.
98 tristate "PCI PF Stub driver"
102 Say Y or M here if you want to enable support for devices that
103 require SR-IOV support, while at the same time the PF itself is
104 not providing any actual services on the host itself such as
105 storage or networking.
107 When in doubt, say N.
109 config XEN_PCIDEV_FRONTEND
110 tristate "Xen PCI Frontend"
111 depends on PCI && X86 && XEN
113 select XEN_XENBUS_FRONTEND
116 The PCI device frontend driver allows the kernel to import arbitrary
117 PCI devices from a PCI backend to support PCI driver domains.
125 config PCI_LOCKLESS_CONFIG
128 config PCI_BRIDGE_EMUL
132 bool "PCI IOV support"
136 I/O Virtualization is a PCI feature supported by some devices
137 which allows them to create virtual devices which share their
143 bool "PCI PRI support"
147 PRI is the PCI Page Request Interface. It allows PCI devices that are
148 behind an IOMMU to recover from page faults.
153 bool "PCI PASID support"
157 Process Address Space Identifiers (PASIDs) can be used by PCI devices
158 to access more than one IO address space at the same time. To make
159 use of this feature an IOMMU is required which also supports PASIDs.
160 Select this option if you have such an IOMMU and want to compile the
161 driver for it into your kernel.
166 bool "PCI peer-to-peer transfer support"
167 depends on PCI && ZONE_DEVICE
168 select GENERIC_ALLOCATOR
170 Enableѕ drivers to do PCI peer-to-peer transactions to and from
171 BARs that are exposed in other devices that are the part of
172 the hierarchy where peer-to-peer DMA is guaranteed by the PCI
173 specification to work (ie. anything below a single PCI bridge).
175 Many PCIe root complexes do not support P2P transactions and
176 it's hard to tell which support it at all, so at this time,
177 P2P DMA transations must be between devices behind the same root
183 def_bool y if (DMI || ACPI)
188 tristate "Hyper-V PCI Frontend"
189 depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
191 The PCI device frontend driver allows the kernel to import arbitrary
192 PCI devices from a PCI backend to support PCI driver domains.
194 source "drivers/pci/hotplug/Kconfig"
195 source "drivers/pci/controller/Kconfig"
196 source "drivers/pci/endpoint/Kconfig"
197 source "drivers/pci/switch/Kconfig"