xref: /openbmc/linux/drivers/pci/Kconfig (revision 7e567624)
1#
2# PCI configuration
3#
4
5source "drivers/pci/pcie/Kconfig"
6
7config PCI_BUS_ADDR_T_64BIT
8	def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
9	depends on PCI
10
11config PCI_MSI
12	bool "Message Signaled Interrupts (MSI and MSI-X)"
13	depends on PCI
14	select GENERIC_MSI_IRQ
15	help
16	   This allows device drivers to enable MSI (Message Signaled
17	   Interrupts).  Message Signaled Interrupts enable a device to
18	   generate an interrupt using an inbound Memory Write on its
19	   PCI bus instead of asserting a device IRQ pin.
20
21	   Use of PCI MSI interrupts can be disabled at kernel boot time
22	   by using the 'pci=nomsi' option.  This disables MSI for the
23	   entire system.
24
25	   If you don't know what to do here, say Y.
26
27config PCI_MSI_IRQ_DOMAIN
28	bool
29	depends on PCI_MSI
30	select GENERIC_MSI_IRQ_DOMAIN
31
32config PCI_DEBUG
33	bool "PCI Debugging"
34	depends on PCI && DEBUG_KERNEL
35	help
36	  Say Y here if you want the PCI core to produce a bunch of debug
37	  messages to the system log.  Select this if you are having a
38	  problem with PCI support and want to see more of what is going on.
39
40	  When in doubt, say N.
41
42config PCI_REALLOC_ENABLE_AUTO
43	bool "Enable PCI resource re-allocation detection"
44	depends on PCI
45	help
46	  Say Y here if you want the PCI core to detect if PCI resource
47	  re-allocation needs to be enabled. You can always use pci=realloc=on
48          or pci=realloc=off to override it.  Note this feature is a no-op
49          unless PCI_IOV support is also enabled; in that case it will
50          automatically re-allocate PCI resources if SR-IOV BARs have not
51          been allocated by the BIOS.
52
53	  When in doubt, say N.
54
55config PCI_STUB
56	tristate "PCI Stub driver"
57	depends on PCI
58	help
59	  Say Y or M here if you want be able to reserve a PCI device
60	  when it is going to be assigned to a guest operating system.
61
62	  When in doubt, say N.
63
64config XEN_PCIDEV_FRONTEND
65        tristate "Xen PCI Frontend"
66        depends on PCI && X86 && XEN
67        select PCI_XEN
68	select XEN_XENBUS_FRONTEND
69        default y
70        help
71          The PCI device frontend driver allows the kernel to import arbitrary
72          PCI devices from a PCI backend to support PCI driver domains.
73
74config HT_IRQ
75	bool "Interrupts on hypertransport devices"
76	default y
77	depends on PCI && X86_LOCAL_APIC
78	help
79	   This allows native hypertransport devices to use interrupts.
80
81	   If unsure say Y.
82
83config PCI_ATS
84	bool
85
86config PCI_ECAM
87	bool
88
89config PCI_IOV
90	bool "PCI IOV support"
91	depends on PCI
92	select PCI_ATS
93	help
94	  I/O Virtualization is a PCI feature supported by some devices
95	  which allows them to create virtual devices which share their
96	  physical resources.
97
98	  If unsure, say N.
99
100config PCI_PRI
101	bool "PCI PRI support"
102	depends on PCI
103	select PCI_ATS
104	help
105	  PRI is the PCI Page Request Interface. It allows PCI devices that are
106	  behind an IOMMU to recover from page faults.
107
108	  If unsure, say N.
109
110config PCI_PASID
111	bool "PCI PASID support"
112	depends on PCI
113	select PCI_ATS
114	help
115	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
116	  to access more than one IO address space at the same time. To make
117	  use of this feature an IOMMU is required which also supports PASIDs.
118	  Select this option if you have such an IOMMU and want to compile the
119	  driver for it into your kernel.
120
121	  If unsure, say N.
122
123config PCI_LABEL
124	def_bool y if (DMI || ACPI)
125	select NLS
126
127config PCI_HYPERV
128        tristate "Hyper-V PCI Frontend"
129        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
130        help
131          The PCI device frontend driver allows the kernel to import arbitrary
132          PCI devices from a PCI backend to support PCI driver domains.
133
134source "drivers/pci/hotplug/Kconfig"
135source "drivers/pci/host/Kconfig"
136