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Linux/drivers/pci/Kconfig

  1 #
  2 # PCI configuration
  3 #
  4 config PCI_MSI
  5         bool "Message Signaled Interrupts (MSI and MSI-X)"
  6         depends on PCI
  7         help
  8            This allows device drivers to enable MSI (Message Signaled
  9            Interrupts).  Message Signaled Interrupts enable a device to
 10            generate an interrupt using an inbound Memory Write on its
 11            PCI bus instead of asserting a device IRQ pin.
 12 
 13            Use of PCI MSI interrupts can be disabled at kernel boot time
 14            by using the 'pci=nomsi' option.  This disables MSI for the
 15            entire system.
 16 
 17            If you don't know what to do here, say Y.
 18 
 19 config PCI_DEBUG
 20         bool "PCI Debugging"
 21         depends on PCI && DEBUG_KERNEL
 22         help
 23           Say Y here if you want the PCI core to produce a bunch of debug
 24           messages to the system log.  Select this if you are having a
 25           problem with PCI support and want to see more of what is going on.
 26 
 27           When in doubt, say N.
 28 
 29 config PCI_REALLOC_ENABLE_AUTO
 30         bool "Enable PCI resource re-allocation detection"
 31         depends on PCI
 32         help
 33           Say Y here if you want the PCI core to detect if PCI resource
 34           re-allocation needs to be enabled. You can always use pci=realloc=on
 35           or pci=realloc=off to override it.  Note this feature is a no-op
 36           unless PCI_IOV support is also enabled; in that case it will
 37           automatically re-allocate PCI resources if SR-IOV BARs have not
 38           been allocated by the BIOS.
 39 
 40           When in doubt, say N.
 41 
 42 config PCI_STUB
 43         tristate "PCI Stub driver"
 44         depends on PCI
 45         help
 46           Say Y or M here if you want be able to reserve a PCI device
 47           when it is going to be assigned to a guest operating system.
 48 
 49           When in doubt, say N.
 50 
 51 config XEN_PCIDEV_FRONTEND
 52         tristate "Xen PCI Frontend"
 53         depends on PCI && X86 && XEN
 54         select PCI_XEN
 55         select XEN_XENBUS_FRONTEND
 56         default y
 57         help
 58           The PCI device frontend driver allows the kernel to import arbitrary
 59           PCI devices from a PCI backend to support PCI driver domains.
 60 
 61 config HT_IRQ
 62         bool "Interrupts on hypertransport devices"
 63         default y
 64         depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
 65         help
 66            This allows native hypertransport devices to use interrupts.
 67 
 68            If unsure say Y.
 69 
 70 config PCI_ATS
 71         bool
 72 
 73 config PCI_IOV
 74         bool "PCI IOV support"
 75         depends on PCI
 76         select PCI_ATS
 77         help
 78           I/O Virtualization is a PCI feature supported by some devices
 79           which allows them to create virtual devices which share their
 80           physical resources.
 81 
 82           If unsure, say N.
 83 
 84 config PCI_PRI
 85         bool "PCI PRI support"
 86         depends on PCI
 87         select PCI_ATS
 88         help
 89           PRI is the PCI Page Request Interface. It allows PCI devices that are
 90           behind an IOMMU to recover from page faults.
 91 
 92           If unsure, say N.
 93 
 94 config PCI_PASID
 95         bool "PCI PASID support"
 96         depends on PCI
 97         select PCI_ATS
 98         help
 99           Process Address Space Identifiers (PASIDs) can be used by PCI devices
100           to access more than one IO address space at the same time. To make
101           use of this feature an IOMMU is required which also supports PASIDs.
102           Select this option if you have such an IOMMU and want to compile the
103           driver for it into your kernel.
104 
105           If unsure, say N.
106 
107 config PCI_IOAPIC
108         bool "PCI IO-APIC hotplug support" if X86
109         depends on PCI
110         depends on ACPI
111         depends on X86_IO_APIC
112         default !X86
113 
114 config PCI_LABEL
115         def_bool y if (DMI || ACPI)
116         select NLS
117 
118 source "drivers/pci/host/Kconfig"

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