1 # SPDX-License-Identifier: GPL-2.0-only
9 This option is selected by any driver which implements the virtio
10 bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
16 Modern PCI device implementation. This module implements the
17 basic probe and control for devices which are based on modern
18 PCI device with possible vendor specific extensions. Any
19 module that selects this module must depend on PCI.
21 config VIRTIO_PCI_LIB_LEGACY
24 Legacy PCI device (Virtio PCI Card 0.9.x Draft and older device)
26 This module implements the basic probe and control for devices
27 which are based on legacy PCI device. Any module that selects this
28 module must depend on PCI.
30 menuconfig VIRTIO_MENU
36 config VIRTIO_HARDEN_NOTIFICATION
37 bool "Harden virtio notification"
40 Enable this to harden the device notifications and suppress
41 those that happen at a time where notifications are illegal.
43 Experimental: Note that several drivers still have issues that
44 may cause crashes or hangs when correct handling of
45 notifications is enforced; depending on the subset of
46 drivers and devices you use, this may or may not work.
51 tristate "PCI driver for virtio devices"
56 This driver provides support for virtio based paravirtual device
57 drivers over PCI. This requires that your VMM has appropriate PCI
58 virtio backends. Most QEMU based VMMs should support these devices
63 config VIRTIO_PCI_LEGACY
64 bool "Support for legacy virtio draft 0.9.X and older devices"
67 select VIRTIO_PCI_LIB_LEGACY
69 Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
71 This option enables building a transitional driver, supporting
72 both devices conforming to Virtio 1 specification, and legacy devices.
73 If disabled, you get a slightly smaller, non-transitional driver,
74 with no legacy compatibility.
76 So look out into your driveway. Do you have a flying car? If
77 so, you can happily disable this option and virtio will not
78 break. Otherwise, leave it set. Unless you're testing what
79 life will be like in The Future.
84 tristate "vDPA driver for virtio devices"
88 This driver provides support for virtio based paravirtual
89 device driver over vDPA bus. For this to be useful, you need
90 an appropriate vDPA device implementation that operates on a
91 physical device to allow the datapath of virtio to be
92 offloaded to hardware.
97 tristate "Support for virtio pmem driver"
101 This driver provides access to virtio-pmem devices, storage devices
102 that are mapped into the physical address space - similar to NVDIMMs
103 - with a virtio-based flushing interface.
107 config VIRTIO_BALLOON
108 tristate "Virtio balloon driver"
110 select MEMORY_BALLOON
111 select PAGE_REPORTING
113 This driver supports increasing and decreasing the amount
114 of memory within a KVM guest.
119 tristate "Virtio mem driver"
120 depends on X86_64 || ARM64
122 depends on MEMORY_HOTPLUG
123 depends on MEMORY_HOTREMOVE
124 depends on CONTIG_ALLOC
125 depends on EXCLUSIVE_SYSTEM_RAM
127 This driver provides access to virtio-mem paravirtualized memory
128 devices, allowing to hotplug and hotunplug memory.
130 This driver was only tested under x86-64 and arm64, but should
131 theoretically work on all architectures that support memory hotplug
137 tristate "Virtio input driver"
141 This driver supports virtio input devices such as
142 keyboards, mice and tablets.
147 tristate "Platform bus driver for memory mapped virtio devices"
148 depends on HAS_IOMEM && HAS_DMA
151 This drivers provides support for memory mapped virtio
152 platform device driver.
156 config VIRTIO_MMIO_CMDLINE_DEVICES
157 bool "Memory mapped virtio devices parameter parsing"
158 depends on VIRTIO_MMIO
160 Allow virtio-mmio devices instantiation via the kernel command line
161 or module parameters. Be aware that using incorrect parameters (base
162 address in particular) can crash your system - you have been warned.
163 See Documentation/admin-guide/kernel-parameters.rst for details.
167 config VIRTIO_DMA_SHARED_BUFFER
169 depends on DMA_SHARED_BUFFER
171 This option adds a flavor of dma buffers that are backed by