drivers/virtio/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 config VIRTIO
   3         tristate
   4         ---help---
   5           This option is selected by any driver which implements the virtio
   6           bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
   7           or CONFIG_S390_GUEST.
   8
   9 menuconfig VIRTIO_MENU
  10         bool "Virtio drivers"
  11         default y
  12
  13 if VIRTIO_MENU
  14
  15 config VIRTIO_PCI
  16         tristate "PCI driver for virtio devices"
  17         depends on PCI
  18         select VIRTIO
  19         ---help---
  20           This driver provides support for virtio based paravirtual device
  21           drivers over PCI.  This requires that your VMM has appropriate PCI
  22           virtio backends.  Most QEMU based VMMs should support these devices
  23           (like KVM or Xen).
  24
  25           If unsure, say M.
  26
  27 config VIRTIO_PCI_LEGACY
  28         bool "Support for legacy virtio draft 0.9.X and older devices"
  29         default y
  30         depends on VIRTIO_PCI
  31         ---help---
  32           Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
  33
  34           This option enables building a transitional driver, supporting
  35           both devices conforming to Virtio 1 specification, and legacy devices.
  36           If disabled, you get a slightly smaller, non-transitional driver,
  37           with no legacy compatibility.
  38
  39           So look out into your driveway.  Do you have a flying car?  If
  40           so, you can happily disable this option and virtio will not
  41           break.  Otherwise, leave it set.  Unless you're testing what
  42           life will be like in The Future.
  43
  44           If unsure, say Y.
  45
  46 config VIRTIO_PMEM
  47         tristate "Support for virtio pmem driver"
  48         depends on VIRTIO
  49         depends on LIBNVDIMM
  50         help
  51           This driver provides access to virtio-pmem devices, storage devices
  52           that are mapped into the physical address space - similar to NVDIMMs
  53            - with a virtio-based flushing interface.
  54
  55           If unsure, say Y.
  56
  57 config VIRTIO_BALLOON
  58         tristate "Virtio balloon driver"
  59         depends on VIRTIO
  60         select MEMORY_BALLOON
  61         ---help---
  62          This driver supports increasing and decreasing the amount
  63          of memory within a KVM guest.
  64
  65          If unsure, say M.
  66
  67 config VIRTIO_INPUT
  68         tristate "Virtio input driver"
  69         depends on VIRTIO
  70         depends on INPUT
  71         ---help---
  72          This driver supports virtio input devices such as
  73          keyboards, mice and tablets.
  74
  75          If unsure, say M.
  76
  77 config VIRTIO_MMIO
  78         tristate "Platform bus driver for memory mapped virtio devices"
  79         depends on HAS_IOMEM && HAS_DMA
  80         select VIRTIO
  81         ---help---
  82          This drivers provides support for memory mapped virtio
  83          platform device driver.
  84
  85          If unsure, say N.
  86
  87 config VIRTIO_MMIO_CMDLINE_DEVICES
  88         bool "Memory mapped virtio devices parameter parsing"
  89         depends on VIRTIO_MMIO
  90         ---help---
  91          Allow virtio-mmio devices instantiation via the kernel command line
  92          or module parameters. Be aware that using incorrect parameters (base
  93          address in particular) can crash your system - you have been warned.
  94          See Documentation/admin-guide/kernel-parameters.rst for details.
  95
  96          If unsure, say 'N'.
  97
  98 endif # VIRTIO_MENU