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# PCI configuration
config PCI_MSI
bool "Message Signaled Interrupts (MSI and MSI-X)"
depends on PCI
This allows device drivers to enable MSI (Message Signaled
Interrupts). Message Signaled Interrupts enable a device to
generate an interrupt using an inbound Memory Write on its
PCI bus instead of asserting a device IRQ pin.
Use of PCI MSI interrupts can be disabled at kernel boot time
by using the 'pci=nomsi' option. This disables MSI for the
entire system.
If you don't know what to do here, say Y.
config PCI_DEBUG
bool "PCI Debugging"
depends on PCI && DEBUG_KERNEL
Say Y here if you want the PCI core to produce a bunch of debug
messages to the system log. Select this if you are having a
problem with PCI support and want to see more of what is going on.
When in doubt, say N.
bool "Enable PCI resource re-allocation detection"
depends on PCI
Say Y here if you want the PCI core to detect if PCI resource
re-allocation needs to be enabled. You can always use pci=realloc=on
or pci=realloc=off to override it. Note this feature is a no-op
unless PCI_IOV support is also enabled; in that case it will
automatically re-allocate PCI resources if SR-IOV BARs have not
been allocated by the BIOS.
When in doubt, say N.
config PCI_STUB
tristate "PCI Stub driver"
depends on PCI
Say Y or M here if you want be able to reserve a PCI device
when it is going to be assigned to a guest operating system.
When in doubt, say N.
tristate "Xen PCI Frontend"
depends on PCI && X86 && XEN
select PCI_XEN
default y
The PCI device frontend driver allows the kernel to import arbitrary
PCI devices from a PCI backend to support PCI driver domains.
config HT_IRQ
bool "Interrupts on hypertransport devices"
default y
depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
This allows native hypertransport devices to use interrupts.
If unsure say Y.
config PCI_ATS
config PCI_IOV
bool "PCI IOV support"
depends on PCI
select PCI_ATS
I/O Virtualization is a PCI feature supported by some devices
which allows them to create virtual devices which share their
physical resources.
If unsure, say N.
config PCI_PRI
bool "PCI PRI support"
depends on PCI
select PCI_ATS
PRI is the PCI Page Request Interface. It allows PCI devices that are
behind an IOMMU to recover from page faults.
If unsure, say N.
config PCI_PASID
bool "PCI PASID support"
depends on PCI
select PCI_ATS
Process Address Space Identifiers (PASIDs) can be used by PCI devices
to access more than one IO address space at the same time. To make
use of this feature an IOMMU is required which also supports PASIDs.
Select this option if you have such an IOMMU and want to compile the
driver for it into your kernel.
If unsure, say N.
tristate "PCI IO-APIC hotplug support" if X86
depends on PCI
depends on ACPI
default !X86
config PCI_LABEL
def_bool y if (DMI || ACPI)
select NLS
source "drivers/pci/host/Kconfig"