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Linux/drivers/virtio/Kconfig

  1 config VIRTIO
  2         tristate
  3         ---help---
  4           This option is selected by any driver which implements the virtio
  5           bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_LGUEST,
  6           CONFIG_RPMSG or CONFIG_S390_GUEST.
  7 
  8 menu "Virtio drivers"
  9 
 10 config VIRTIO_PCI
 11         tristate "PCI driver for virtio devices"
 12         depends on PCI
 13         select VIRTIO
 14         ---help---
 15           This driver provides support for virtio based paravirtual device
 16           drivers over PCI.  This requires that your VMM has appropriate PCI
 17           virtio backends.  Most QEMU based VMMs should support these devices
 18           (like KVM or Xen).
 19 
 20           If unsure, say M.
 21 
 22 config VIRTIO_PCI_LEGACY
 23         bool "Support for legacy virtio draft 0.9.X and older devices"
 24         default y
 25         depends on VIRTIO_PCI
 26         ---help---
 27           Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
 28 
 29           This option enables building a transitional driver, supporting
 30           both devices conforming to Virtio 1 specification, and legacy devices.
 31           If disabled, you get a slightly smaller, non-transitional driver,
 32           with no legacy compatibility.
 33 
 34           So look out into your driveway.  Do you have a flying car?  If
 35           so, you can happily disable this option and virtio will not
 36           break.  Otherwise, leave it set.  Unless you're testing what
 37           life will be like in The Future.
 38 
 39           If unsure, say Y.
 40 
 41 config VIRTIO_BALLOON
 42         tristate "Virtio balloon driver"
 43         depends on VIRTIO
 44         select MEMORY_BALLOON
 45         ---help---
 46          This driver supports increasing and decreasing the amount
 47          of memory within a KVM guest.
 48 
 49          If unsure, say M.
 50 
 51 config VIRTIO_INPUT
 52         tristate "Virtio input driver"
 53         depends on VIRTIO
 54         depends on INPUT
 55         ---help---
 56          This driver supports virtio input devices such as
 57          keyboards, mice and tablets.
 58 
 59          If unsure, say M.
 60 
 61  config VIRTIO_MMIO
 62         tristate "Platform bus driver for memory mapped virtio devices"
 63         depends on HAS_IOMEM
 64         select VIRTIO
 65         ---help---
 66          This drivers provides support for memory mapped virtio
 67          platform device driver.
 68 
 69          If unsure, say N.
 70 
 71 config VIRTIO_MMIO_CMDLINE_DEVICES
 72         bool "Memory mapped virtio devices parameter parsing"
 73         depends on VIRTIO_MMIO
 74         ---help---
 75          Allow virtio-mmio devices instantiation via the kernel command line
 76          or module parameters. Be aware that using incorrect parameters (base
 77          address in particular) can crash your system - you have been warned.
 78          See Documentation/kernel-parameters.txt for details.
 79 
 80          If unsure, say 'N'.
 81 
 82 endmenu

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