xref: /openbmc/linux/drivers/pci/Kconfig (revision ba61bb17)
1# SPDX-License-Identifier: GPL-2.0
2#
3# PCI configuration
4#
5
6source "drivers/pci/pcie/Kconfig"
7
8config PCI_MSI
9	bool "Message Signaled Interrupts (MSI and MSI-X)"
10	depends on PCI
11	select GENERIC_MSI_IRQ
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
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
22	   If you don't know what to do here, say Y.
23
24config PCI_MSI_IRQ_DOMAIN
25	def_bool ARC || ARM || ARM64 || X86
26	depends on PCI_MSI
27	select GENERIC_MSI_IRQ_DOMAIN
28
29config 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
38config 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
48config PCI_REALLOC_ENABLE_AUTO
49	bool "Enable PCI resource re-allocation detection"
50	depends on PCI
51	depends on PCI_IOV
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
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.
58
59	  When in doubt, say N.
60
61config 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
70config 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
82config XEN_PCIDEV_FRONTEND
83        tristate "Xen PCI Frontend"
84        depends on PCI && X86 && XEN
85        select PCI_XEN
86	select XEN_XENBUS_FRONTEND
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
92config PCI_ATS
93	bool
94
95config PCI_ECAM
96	bool
97
98config PCI_LOCKLESS_CONFIG
99	bool
100
101config PCI_IOV
102	bool "PCI IOV support"
103	depends on PCI
104	select PCI_ATS
105	help
106	  I/O Virtualization is a PCI feature supported by some devices
107	  which allows them to create virtual devices which share their
108	  physical resources.
109
110	  If unsure, say N.
111
112config PCI_PRI
113	bool "PCI PRI support"
114	depends on PCI
115	select PCI_ATS
116	help
117	  PRI is the PCI Page Request Interface. It allows PCI devices that are
118	  behind an IOMMU to recover from page faults.
119
120	  If unsure, say N.
121
122config PCI_PASID
123	bool "PCI PASID support"
124	depends on PCI
125	select PCI_ATS
126	help
127	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
128	  to access more than one IO address space at the same time. To make
129	  use of this feature an IOMMU is required which also supports PASIDs.
130	  Select this option if you have such an IOMMU and want to compile the
131	  driver for it into your kernel.
132
133	  If unsure, say N.
134
135config PCI_LABEL
136	def_bool y if (DMI || ACPI)
137	depends on PCI
138	select NLS
139
140config PCI_HYPERV
141        tristate "Hyper-V PCI Frontend"
142        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
143        help
144          The PCI device frontend driver allows the kernel to import arbitrary
145          PCI devices from a PCI backend to support PCI driver domains.
146
147source "drivers/pci/hotplug/Kconfig"
148source "drivers/pci/controller/Kconfig"
149source "drivers/pci/endpoint/Kconfig"
150source "drivers/pci/switch/Kconfig"
151