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
12 Modern PCI device implementation. This module implements the
13 basic probe and control for devices which are based on modern
14 PCI device with possible vendor specific extensions. Any
15 module that selects this module must depend on PCI.
17 config VIRTIO_PCI_LIB_LEGACY
20 Legacy PCI device (Virtio PCI Card 0.9.x Draft and older device)
22 This module implements the basic probe and control for devices
23 which are based on legacy PCI device. Any module that selects this
24 module must depend on PCI.
26 menuconfig VIRTIO_MENU
32 config VIRTIO_HARDEN_NOTIFICATION
33 bool "Harden virtio notification"
36 Enable this to harden the device notifications and suppress
37 those that happen at a time where notifications are illegal.
39 Experimental: Note that several drivers still have issues that
40 may cause crashes or hangs when correct handling of
41 notifications is enforced; depending on the subset of
42 drivers and devices you use, this may or may not work.
47 tristate "PCI driver for virtio devices"
52 This driver provides support for virtio based paravirtual device
53 drivers over PCI. This requires that your VMM has appropriate PCI
54 virtio backends. Most QEMU based VMMs should support these devices
59 config VIRTIO_PCI_LEGACY
60 bool "Support for legacy virtio draft 0.9.X and older devices"
63 select VIRTIO_PCI_LIB_LEGACY
65 Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
67 This option enables building a transitional driver, supporting
68 both devices conforming to Virtio 1 specification, and legacy devices.
69 If disabled, you get a slightly smaller, non-transitional driver,
70 with no legacy compatibility.
72 So look out into your driveway. Do you have a flying car? If
73 so, you can happily disable this option and virtio will not
74 break. Otherwise, leave it set. Unless you're testing what
75 life will be like in The Future.
80 tristate "vDPA driver for virtio devices"
84 This driver provides support for virtio based paravirtual
85 device driver over vDPA bus. For this to be useful, you need
86 an appropriate vDPA device implementation that operates on a
87 physical device to allow the datapath of virtio to be
88 offloaded to hardware.
93 tristate "Support for virtio pmem driver"
97 This driver provides access to virtio-pmem devices, storage devices
98 that are mapped into the physical address space - similar to NVDIMMs
99 - with a virtio-based flushing interface.
103 config VIRTIO_BALLOON
104 tristate "Virtio balloon driver"
106 select MEMORY_BALLOON
107 select PAGE_REPORTING
109 This driver supports increasing and decreasing the amount
110 of memory within a KVM guest.
115 tristate "Virtio mem driver"
116 depends on X86_64 || ARM64
118 depends on MEMORY_HOTPLUG
119 depends on MEMORY_HOTREMOVE
120 depends on CONTIG_ALLOC
121 depends on EXCLUSIVE_SYSTEM_RAM
123 This driver provides access to virtio-mem paravirtualized memory
124 devices, allowing to hotplug and hotunplug memory.
126 This driver was only tested under x86-64 and arm64, but should
127 theoretically work on all architectures that support memory hotplug
133 tristate "Virtio input driver"
137 This driver supports virtio input devices such as
138 keyboards, mice and tablets.
143 tristate "Platform bus driver for memory mapped virtio devices"
144 depends on HAS_IOMEM && HAS_DMA
147 This drivers provides support for memory mapped virtio
148 platform device driver.
152 config VIRTIO_MMIO_CMDLINE_DEVICES
153 bool "Memory mapped virtio devices parameter parsing"
154 depends on VIRTIO_MMIO
156 Allow virtio-mmio devices instantiation via the kernel command line
157 or module parameters. Be aware that using incorrect parameters (base
158 address in particular) can crash your system - you have been warned.
159 See Documentation/admin-guide/kernel-parameters.rst for details.
163 config VIRTIO_DMA_SHARED_BUFFER
165 depends on DMA_SHARED_BUFFER
167 This option adds a flavor of dma buffers that are backed by