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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_STUB
35 tristate "PCI Stub driver"
36 depends on PCI
37 help
38 Say Y or M here if you want be able to reserve a PCI device
39 when it is going to be assigned to a guest operating system.
40
41 When in doubt, say N.
42
43config XEN_PCIDEV_FRONTEND
44 tristate "Xen PCI Frontend"
45 depends on PCI && X86 && XEN
46 select HOTPLUG
47 select PCI_XEN
48 select XEN_XENBUS_FRONTEND
49 default y
50 help
51 The PCI device frontend driver allows the kernel to import arbitrary
52 PCI devices from a PCI backend to support PCI driver domains.
53
54config XEN_PCIDEV_FE_DEBUG
55 bool "Xen PCI Frontend debugging"
56 depends on XEN_PCIDEV_FRONTEND && PCI_DEBUG
57 help
58 Say Y here if you want the Xen PCI frontend to produce a bunch of debug
59 messages to the system log. Select this if you are having a
60 problem with Xen PCI frontend support and want to see more of what is
61 going on.
62
63 When in doubt, say N.
64
65config HT_IRQ
66 bool "Interrupts on hypertransport devices"
67 default y
68 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
69 help
70 This allows native hypertransport devices to use interrupts.
71
72 If unsure say Y.
73
74config PCI_IOV
75 bool "PCI IOV support"
76 depends on PCI
77 help
78 I/O Virtualization is a PCI feature supported by some devices
79 which allows them to create virtual devices which share their
80 physical resources.
81
82 If unsure, say N.
83
84config PCI_IOAPIC
85 bool
86 depends on PCI
87 depends on ACPI
88 depends on HOTPLUG
89 default y
90
91config PCI_LABEL
92 def_bool y if (DMI || ACPI)
93 select NLS
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