drivers/pci/Kconfig

   1 #
   2 # PCI configuration
   3 #
   4 config ARCH_SUPPORTS_MSI
   5         bool
   6         default n
   7
   8 config 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
  24 config 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
  34 config PCI_REALLOC_ENABLE_AUTO
  35         bool "Enable PCI resource re-allocation detection"
  36         depends on PCI
  37         help
  38           Say Y here if you want the PCI core to detect if PCI resource
  39           re-allocation needs to be enabled. You can always use pci=realloc=on
  40           or pci=realloc=off to override it.  Note this feature is a no-op
  41           unless PCI_IOV support is also enabled; in that case it will
  42           automatically re-allocate PCI resources if SR-IOV BARs have not
  43           been allocated by the BIOS.
  44
  45           When in doubt, say N.
  46
  47 config PCI_STUB
  48         tristate "PCI Stub driver"
  49         depends on PCI
  50         help
  51           Say Y or M here if you want be able to reserve a PCI device
  52           when it is going to be assigned to a guest operating system.
  53
  54           When in doubt, say N.
  55
  56 config XEN_PCIDEV_FRONTEND
  57         tristate "Xen PCI Frontend"
  58         depends on PCI && X86 && XEN
  59         select HOTPLUG
  60         select PCI_XEN
  61         select XEN_XENBUS_FRONTEND
  62         default y
  63         help
  64           The PCI device frontend driver allows the kernel to import arbitrary
  65           PCI devices from a PCI backend to support PCI driver domains.
  66
  67 config HT_IRQ
  68         bool "Interrupts on hypertransport devices"
  69         default y
  70         depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
  71         help
  72            This allows native hypertransport devices to use interrupts.
  73
  74            If unsure say Y.
  75
  76 config PCI_ATS
  77         bool
  78
  79 config PCI_IOV
  80         bool "PCI IOV support"
  81         depends on PCI
  82         select PCI_ATS
  83         help
  84           I/O Virtualization is a PCI feature supported by some devices
  85           which allows them to create virtual devices which share their
  86           physical resources.
  87
  88           If unsure, say N.
  89
  90 config PCI_PRI
  91         bool "PCI PRI support"
  92         depends on PCI
  93         select PCI_ATS
  94         help
  95           PRI is the PCI Page Request Interface. It allows PCI devices that are
  96           behind an IOMMU to recover from page faults.
  97
  98           If unsure, say N.
  99
 100 config PCI_PASID
 101         bool "PCI PASID support"
 102         depends on PCI
 103         select PCI_ATS
 104         help
 105           Process Address Space Identifiers (PASIDs) can be used by PCI devices
 106           to access more than one IO address space at the same time. To make
 107           use of this feature an IOMMU is required which also supports PASIDs.
 108           Select this option if you have such an IOMMU and want to compile the
 109           driver for it into your kernel.
 110
 111           If unsure, say N.
 112
 113 config PCI_IOAPIC
 114         tristate "PCI IO-APIC hotplug support" if X86
 115         depends on PCI
 116         depends on ACPI
 117         depends on HOTPLUG
 118         default !X86
 119
 120 config PCI_LABEL
 121         def_bool y if (DMI || ACPI)
 122         select NLS