1 # SPDX-License-Identifier: GPL-2.0-only
5 This option is selected by any driver which implements the virtio
6 bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
16 tristate "PCI driver for virtio devices"
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
27 config VIRTIO_PCI_LEGACY
28 bool "Support for legacy virtio draft 0.9.X and older devices"
32 Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
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.
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.
47 tristate "vDPA driver for virtio devices"
51 This driver provides support for virtio based paravirtual
52 device driver over vDPA bus. For this to be useful, you need
53 an appropriate vDPA device implementation that operates on a
54 physical device to allow the datapath of virtio to be
55 offloaded to hardware.
60 tristate "Support for virtio pmem driver"
64 This driver provides access to virtio-pmem devices, storage devices
65 that are mapped into the physical address space - similar to NVDIMMs
66 - with a virtio-based flushing interface.
71 tristate "Virtio balloon driver"
76 This driver supports increasing and decreasing the amount
77 of memory within a KVM guest.
82 tristate "Virtio mem driver"
86 depends on MEMORY_HOTPLUG_SPARSE
87 depends on MEMORY_HOTREMOVE
88 depends on CONTIG_ALLOC
90 This driver provides access to virtio-mem paravirtualized memory
91 devices, allowing to hotplug and hotunplug memory.
93 This driver was only tested under x86-64, but should theoretically
94 work on all architectures that support memory hotplug and hotremove.
99 tristate "Virtio input driver"
103 This driver supports virtio input devices such as
104 keyboards, mice and tablets.
109 tristate "Platform bus driver for memory mapped virtio devices"
110 depends on HAS_IOMEM && HAS_DMA
113 This drivers provides support for memory mapped virtio
114 platform device driver.
118 config VIRTIO_MMIO_CMDLINE_DEVICES
119 bool "Memory mapped virtio devices parameter parsing"
120 depends on VIRTIO_MMIO
122 Allow virtio-mmio devices instantiation via the kernel command line
123 or module parameters. Be aware that using incorrect parameters (base
124 address in particular) can crash your system - you have been warned.
125 See Documentation/admin-guide/kernel-parameters.rst for details.
129 config VIRTIO_DMA_SHARED_BUFFER
131 depends on DMA_SHARED_BUFFER
133 This option adds a flavor of dma buffers that are backed by