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 HT_IRQ
55	bool "Interrupts on hypertransport devices"
56	default y
57	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
58	help
59	   This allows native hypertransport devices to use interrupts.
60
61	   If unsure say Y.
62
63config PCI_ATS
64	bool
65
66config PCI_IOV
67	bool "PCI IOV support"
68	depends on PCI
69	select PCI_ATS
70	help
71	  I/O Virtualization is a PCI feature supported by some devices
72	  which allows them to create virtual devices which share their
73	  physical resources.
74
75	  If unsure, say N.
76
77config PCI_PRI
78	bool "PCI PRI support"
79	depends on PCI
80	select PCI_ATS
81	help
82	  PRI is the PCI Page Request Interface. It allows PCI devices that are
83	  behind an IOMMU to recover from page faults.
84
85	  If unsure, say N.
86
87config PCI_PASID
88	bool "PCI PASID support"
89	depends on PCI
90	select PCI_ATS
91	help
92	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
93	  to access more than one IO address space at the same time. To make
94	  use of this feature an IOMMU is required which also supports PASIDs.
95	  Select this option if you have such an IOMMU and want to compile the
96	  driver for it into your kernel.
97
98	  If unsure, say N.
99
100config PCI_IOAPIC
101	tristate "PCI IO-APIC hotplug support" if X86
102	depends on PCI
103	depends on ACPI
104	depends on HOTPLUG
105	default !X86
106
107config PCI_LABEL
108	def_bool y if (DMI || ACPI)
109	select NLS
110