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- #
- # PCI configuration
- #
- config ARCH_SUPPORTS_MSI
- bool
- default n
- config PCI_MSI
- bool "Message Signaled Interrupts (MSI and MSI-X)"
- depends on PCI
- depends on ARCH_SUPPORTS_MSI
- help
- 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
- help
- 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.
- config PCI_REALLOC_ENABLE_AUTO
- bool "Enable PCI resource re-allocation detection"
- depends on PCI
- help
- 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
- help
- 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.
- config XEN_PCIDEV_FRONTEND
- tristate "Xen PCI Frontend"
- depends on PCI && X86 && XEN
- select HOTPLUG
- select PCI_XEN
- select XEN_XENBUS_FRONTEND
- default y
- help
- 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
- help
- This allows native hypertransport devices to use interrupts.
- If unsure say Y.
- config PCI_ATS
- bool
- config PCI_IOV
- bool "PCI IOV support"
- depends on PCI
- select PCI_ATS
- help
- 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
- help
- 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
- help
- 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.
- config PCI_IOAPIC
- tristate "PCI IO-APIC hotplug support" if X86
- depends on PCI
- depends on ACPI
- depends on HOTPLUG
- default !X86
- config PCI_LABEL
- def_bool y if (DMI || ACPI)
- select NLS
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