4 config ARCH_SUPPORTS_MSI
8 bool "Message Signaled Interrupts (MSI and MSI-X)"
10 depends on ARCH_SUPPORTS_MSI
12 This allows device drivers to enable MSI (Message Signaled
13 Interrupts). Message Signaled Interrupts enable a device to
14 generate an interrupt using an inbound Memory Write on its
15 PCI bus instead of asserting a device IRQ pin.
17 Use of PCI MSI interrupts can be disabled at kernel boot time
18 by using the 'pci=nomsi' option. This disables MSI for the
21 If you don't know what to do here, say Y.
25 depends on PCI && DEBUG_KERNEL
27 Say Y here if you want the PCI core to produce a bunch of debug
28 messages to the system log. Select this if you are having a
29 problem with PCI support and want to see more of what is going on.
33 config PCI_REALLOC_ENABLE_AUTO
34 bool "Enable PCI resource re-allocation detection"
37 Say Y here if you want the PCI core to detect if PCI resource
38 re-allocation needs to be enabled. You can always use pci=realloc=on
39 or pci=realloc=off to override it. Note this feature is a no-op
40 unless PCI_IOV support is also enabled; in that case it will
41 automatically re-allocate PCI resources if SR-IOV BARs have not
42 been allocated by the BIOS.
47 tristate "PCI Stub driver"
50 Say Y or M here if you want be able to reserve a PCI device
51 when it is going to be assigned to a guest operating system.
55 config XEN_PCIDEV_FRONTEND
56 tristate "Xen PCI Frontend"
57 depends on PCI && X86 && XEN
59 select XEN_XENBUS_FRONTEND
62 The PCI device frontend driver allows the kernel to import arbitrary
63 PCI devices from a PCI backend to support PCI driver domains.
66 bool "Interrupts on hypertransport devices"
68 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
70 This allows native hypertransport devices to use interrupts.
78 bool "PCI IOV support"
82 I/O Virtualization is a PCI feature supported by some devices
83 which allows them to create virtual devices which share their
89 bool "PCI PRI support"
93 PRI is the PCI Page Request Interface. It allows PCI devices that are
94 behind an IOMMU to recover from page faults.
99 bool "PCI PASID support"
103 Process Address Space Identifiers (PASIDs) can be used by PCI devices
104 to access more than one IO address space at the same time. To make
105 use of this feature an IOMMU is required which also supports PASIDs.
106 Select this option if you have such an IOMMU and want to compile the
107 driver for it into your kernel.
112 tristate "PCI IO-APIC hotplug support" if X86
118 def_bool y if (DMI || ACPI)
121 source "drivers/pci/host/Kconfig"