drivers/pci/Kconfig

   1 #
   2 # PCI configuration
   3 #
   4 config PCI_BUS_ADDR_T_64BIT
   5         def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
   6         depends on PCI
   7
   8 config PCI_MSI
   9         bool "Message Signaled Interrupts (MSI and MSI-X)"
  10         depends on PCI
  11         select GENERIC_MSI_IRQ
  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_MSI_IRQ_DOMAIN
  25         bool
  26         depends on PCI_MSI
  27         select GENERIC_MSI_IRQ_DOMAIN
  28
  29 config PCI_DEBUG
  30         bool "PCI Debugging"
  31         depends on PCI && DEBUG_KERNEL
  32         help
  33           Say Y here if you want the PCI core to produce a bunch of debug
  34           messages to the system log.  Select this if you are having a
  35           problem with PCI support and want to see more of what is going on.
  36
  37           When in doubt, say N.
  38
  39 config PCI_REALLOC_ENABLE_AUTO
  40         bool "Enable PCI resource re-allocation detection"
  41         depends on PCI
  42         help
  43           Say Y here if you want the PCI core to detect if PCI resource
  44           re-allocation needs to be enabled. You can always use pci=realloc=on
  45           or pci=realloc=off to override it.  Note this feature is a no-op
  46           unless PCI_IOV support is also enabled; in that case it will
  47           automatically re-allocate PCI resources if SR-IOV BARs have not
  48           been allocated by the BIOS.
  49
  50           When in doubt, say N.
  51
  52 config PCI_STUB
  53         tristate "PCI Stub driver"
  54         depends on PCI
  55         help
  56           Say Y or M here if you want be able to reserve a PCI device
  57           when it is going to be assigned to a guest operating system.
  58
  59           When in doubt, say N.
  60
  61 config XEN_PCIDEV_FRONTEND
  62         tristate "Xen PCI Frontend"
  63         depends on PCI && X86 && XEN
  64         select PCI_XEN
  65         select XEN_XENBUS_FRONTEND
  66         default y
  67         help
  68           The PCI device frontend driver allows the kernel to import arbitrary
  69           PCI devices from a PCI backend to support PCI driver domains.
  70
  71 config HT_IRQ
  72         bool "Interrupts on hypertransport devices"
  73         default y
  74         depends on PCI && X86_LOCAL_APIC
  75         help
  76            This allows native hypertransport devices to use interrupts.
  77
  78            If unsure say Y.
  79
  80 config PCI_ATS
  81         bool
  82
  83 config PCI_IOV
  84         bool "PCI IOV support"
  85         depends on PCI
  86         select PCI_ATS
  87         help
  88           I/O Virtualization is a PCI feature supported by some devices
  89           which allows them to create virtual devices which share their
  90           physical resources.
  91
  92           If unsure, say N.
  93
  94 config PCI_PRI
  95         bool "PCI PRI support"
  96         depends on PCI
  97         select PCI_ATS
  98         help
  99           PRI is the PCI Page Request Interface. It allows PCI devices that are
 100           behind an IOMMU to recover from page faults.
 101
 102           If unsure, say N.
 103
 104 config PCI_PASID
 105         bool "PCI PASID support"
 106         depends on PCI
 107         select PCI_ATS
 108         help
 109           Process Address Space Identifiers (PASIDs) can be used by PCI devices
 110           to access more than one IO address space at the same time. To make
 111           use of this feature an IOMMU is required which also supports PASIDs.
 112           Select this option if you have such an IOMMU and want to compile the
 113           driver for it into your kernel.
 114
 115           If unsure, say N.
 116
 117 config PCI_LABEL
 118         def_bool y if (DMI || ACPI)
 119         select NLS
 120
 121 config PCI_HYPERV
 122         tristate "Hyper-V PCI Frontend"
 123         depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
 124         help
 125           The PCI device frontend driver allows the kernel to import arbitrary
 126           PCI devices from a PCI backend to support PCI driver domains.
 127
 128 source "drivers/pci/host/Kconfig"