Root/drivers/pci/Kconfig

1#
2# PCI configuration
3#
4config ARCH_SUPPORTS_MSI
5    bool
6    default n
7
8config PCI_MSI
9    bool "Message Signaled Interrupts (MSI and MSI-X)"
10    depends on PCI
11    depends on ARCH_SUPPORTS_MSI
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_DEBUG
25    bool "PCI Debugging"
26    depends on PCI && DEBUG_KERNEL
27    help
28      Say Y here if you want the PCI core to produce a bunch of debug
29      messages to the system log. Select this if you are having a
30      problem with PCI support and want to see more of what is going on.
31
32      When in doubt, say N.
33
34config PCI_REALLOC_ENABLE_AUTO
35    bool "Enable PCI resource re-allocation detection"
36    depends on PCI
37    help
38      Say Y here if you want the PCI core to detect if PCI resource
39      re-allocation needs to be enabled. You can always use pci=realloc=on
40          or pci=realloc=off to override it. Note this feature is a no-op
41          unless PCI_IOV support is also enabled; in that case it will
42          automatically re-allocate PCI resources if SR-IOV BARs have not
43          been allocated by the BIOS.
44
45      When in doubt, say N.
46
47config PCI_STUB
48    tristate "PCI Stub driver"
49    depends on PCI
50    help
51      Say Y or M here if you want be able to reserve a PCI device
52      when it is going to be assigned to a guest operating system.
53
54      When in doubt, say N.
55
56config XEN_PCIDEV_FRONTEND
57        tristate "Xen PCI Frontend"
58        depends on PCI && X86 && XEN
59        select HOTPLUG
60        select PCI_XEN
61    select XEN_XENBUS_FRONTEND
62        default y
63        help
64          The PCI device frontend driver allows the kernel to import arbitrary
65          PCI devices from a PCI backend to support PCI driver domains.
66
67config HT_IRQ
68    bool "Interrupts on hypertransport devices"
69    default y
70    depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
71    help
72       This allows native hypertransport devices to use interrupts.
73
74       If unsure say Y.
75
76config PCI_ATS
77    bool
78
79config PCI_IOV
80    bool "PCI IOV support"
81    depends on PCI
82    select PCI_ATS
83    help
84      I/O Virtualization is a PCI feature supported by some devices
85      which allows them to create virtual devices which share their
86      physical resources.
87
88      If unsure, say N.
89
90config PCI_PRI
91    bool "PCI PRI support"
92    depends on PCI
93    select PCI_ATS
94    help
95      PRI is the PCI Page Request Interface. It allows PCI devices that are
96      behind an IOMMU to recover from page faults.
97
98      If unsure, say N.
99
100config PCI_PASID
101    bool "PCI PASID support"
102    depends on PCI
103    select PCI_ATS
104    help
105      Process Address Space Identifiers (PASIDs) can be used by PCI devices
106      to access more than one IO address space at the same time. To make
107      use of this feature an IOMMU is required which also supports PASIDs.
108      Select this option if you have such an IOMMU and want to compile the
109      driver for it into your kernel.
110
111      If unsure, say N.
112
113config PCI_IOAPIC
114    tristate "PCI IO-APIC hotplug support" if X86
115    depends on PCI
116    depends on ACPI
117    depends on HOTPLUG
118    default !X86
119
120config PCI_LABEL
121    def_bool y if (DMI || ACPI)
122    select NLS
123

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