drivers/pci/Kconfig

   1 #
   2 # PCI configuration
   3 #
   4 config ARCH_SUPPORTS_MSI
   5         bool
   6
   7 config PCI_MSI
   8         bool "Message Signaled Interrupts (MSI and MSI-X)"
   9         depends on PCI
  10         depends on ARCH_SUPPORTS_MSI
  11         help
  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.
  16
  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
  19            entire system.
  20
  21            If you don't know what to do here, say Y.
  22
  23 config PCI_DEBUG
  24         bool "PCI Debugging"
  25         depends on PCI && DEBUG_KERNEL
  26         help
  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.
  30
  31           When in doubt, say N.
  32
  33 config PCI_REALLOC_ENABLE_AUTO
  34         bool "Enable PCI resource re-allocation detection"
  35         depends on PCI
  36         help
  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.
  43
  44           When in doubt, say N.
  45
  46 config PCI_STUB
  47         tristate "PCI Stub driver"
  48         depends on PCI
  49         help
  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.
  52
  53           When in doubt, say N.
  54
  55 config XEN_PCIDEV_FRONTEND
  56         tristate "Xen PCI Frontend"
  57         depends on PCI && X86 && XEN
  58         select HOTPLUG
  59         select PCI_XEN
  60         select XEN_XENBUS_FRONTEND
  61         default y
  62         help
  63           The PCI device frontend driver allows the kernel to import arbitrary
  64           PCI devices from a PCI backend to support PCI driver domains.
  65
  66 config HT_IRQ
  67         bool "Interrupts on hypertransport devices"
  68         default y
  69         depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
  70         help
  71            This allows native hypertransport devices to use interrupts.
  72
  73            If unsure say Y.
  74
  75 config PCI_ATS
  76         bool
  77
  78 config PCI_IOV
  79         bool "PCI IOV support"
  80         depends on PCI
  81         select PCI_ATS
  82         help
  83           I/O Virtualization is a PCI feature supported by some devices
  84           which allows them to create virtual devices which share their
  85           physical resources.
  86
  87           If unsure, say N.
  88
  89 config PCI_PRI
  90         bool "PCI PRI support"
  91         depends on PCI
  92         select PCI_ATS
  93         help
  94           PRI is the PCI Page Request Interface. It allows PCI devices that are
  95           behind an IOMMU to recover from page faults.
  96
  97           If unsure, say N.
  98
  99 config PCI_PASID
 100         bool "PCI PASID support"
 101         depends on PCI
 102         select PCI_ATS
 103         help
 104           Process Address Space Identifiers (PASIDs) can be used by PCI devices
 105           to access more than one IO address space at the same time. To make
 106           use of this feature an IOMMU is required which also supports PASIDs.
 107           Select this option if you have such an IOMMU and want to compile the
 108           driver for it into your kernel.
 109
 110           If unsure, say N.
 111
 112 config PCI_IOAPIC
 113         tristate "PCI IO-APIC hotplug support" if X86
 114         depends on PCI
 115         depends on ACPI
 116         depends on HOTPLUG
 117         default !X86
 118
 119 config PCI_LABEL
 120         def_bool y if (DMI || ACPI)
 121         select NLS