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 PCI_XEN
  59         select XEN_XENBUS_FRONTEND
  60         default y
  61         help
  62           The PCI device frontend driver allows the kernel to import arbitrary
  63           PCI devices from a PCI backend to support PCI driver domains.
  64
  65 config HT_IRQ
  66         bool "Interrupts on hypertransport devices"
  67         default y
  68         depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
  69         help
  70            This allows native hypertransport devices to use interrupts.
  71
  72            If unsure say Y.
  73
  74 config PCI_ATS
  75         bool
  76
  77 config PCI_IOV
  78         bool "PCI IOV support"
  79         depends on PCI
  80         select PCI_ATS
  81         help
  82           I/O Virtualization is a PCI feature supported by some devices
  83           which allows them to create virtual devices which share their
  84           physical resources.
  85
  86           If unsure, say N.
  87
  88 config PCI_PRI
  89         bool "PCI PRI support"
  90         depends on PCI
  91         select PCI_ATS
  92         help
  93           PRI is the PCI Page Request Interface. It allows PCI devices that are
  94           behind an IOMMU to recover from page faults.
  95
  96           If unsure, say N.
  97
  98 config PCI_PASID
  99         bool "PCI PASID support"
 100         depends on PCI
 101         select PCI_ATS
 102         help
 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.
 108
 109           If unsure, say N.
 110
 111 config PCI_IOAPIC
 112         tristate "PCI IO-APIC hotplug support" if X86
 113         depends on PCI
 114         depends on ACPI
 115         default !X86
 116
 117 config PCI_LABEL
 118         def_bool y if (DMI || ACPI)
 119         select NLS
 120
 121 source "drivers/pci/host/Kconfig"