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Thomas Gleixnerec8f24b2019-05-19 13:07:45 +01001# SPDX-License-Identifier: GPL-2.0-only
Juergen Grossa6030022022-06-22 08:38:36 +02002config VIRTIO_ANCHOR
3 bool
4
Rusty Russellec3d41c2007-10-22 11:03:36 +10005config VIRTIO
Rusty Russellc6fd4702008-02-04 23:50:05 -05006 tristate
Juergen Grossa6030022022-06-22 08:38:36 +02007 select VIRTIO_ANCHOR
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +09008 help
Rusty Russell387daf12012-09-28 15:05:15 +09309 This option is selected by any driver which implements the virtio
Juergen Grossecda85e2017-08-16 19:31:57 +020010 bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
11 or CONFIG_S390_GUEST.
Rusty Russell0a8a69d2007-10-22 11:03:40 +100012
Jason Wangfd502722021-01-04 14:55:00 +080013config VIRTIO_PCI_LIB
14 tristate
15 help
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.
20
Wu Zongyongd89c81692021-10-29 17:14:42 +080021config VIRTIO_PCI_LIB_LEGACY
22 tristate
23 help
24 Legacy PCI device (Virtio PCI Card 0.9.x Draft and older device)
25 implementation.
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.
29
Vincent Legoll7b95fec2018-01-07 12:33:56 +010030menuconfig VIRTIO_MENU
31 bool "Virtio drivers"
32 default y
33
34if VIRTIO_MENU
Ohad Ben-Cohene7254212011-07-05 17:06:14 +030035
Jason Wangc346dae2022-06-22 09:29:40 +080036config VIRTIO_HARDEN_NOTIFICATION
37 bool "Harden virtio notification"
Michael S. Tsirkinebe797f2022-06-30 15:10:57 -040038 depends on BROKEN
Jason Wangc346dae2022-06-22 09:29:40 +080039 help
40 Enable this to harden the device notifications and suppress
41 those that happen at a time where notifications are illegal.
42
Michael S. Tsirkinebe797f2022-06-30 15:10:57 -040043 Experimental: Note that several drivers still have issues that
Jason Wangc346dae2022-06-22 09:29:40 +080044 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.
47
48 If unsure, say N.
49
Anthony Liguori33436602007-11-12 21:30:26 -060050config VIRTIO_PCI
Kees Cookd72c5a82012-10-02 11:19:07 -070051 tristate "PCI driver for virtio devices"
52 depends on PCI
Jason Wangfd502722021-01-04 14:55:00 +080053 select VIRTIO_PCI_LIB
Anthony Liguori33436602007-11-12 21:30:26 -060054 select VIRTIO
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +090055 help
Michael S. Tsirkinb2a6d512015-01-15 14:15:51 +020056 This driver provides support for virtio based paravirtual device
Anthony Liguori33436602007-11-12 21:30:26 -060057 drivers over PCI. This requires that your VMM has appropriate PCI
58 virtio backends. Most QEMU based VMMs should support these devices
59 (like KVM or Xen).
60
Anthony Liguori33436602007-11-12 21:30:26 -060061 If unsure, say M.
62
Yishai Hadasf51e1462023-12-19 11:32:43 +020063config VIRTIO_PCI_ADMIN_LEGACY
64 bool
65 depends on VIRTIO_PCI && (X86 || COMPILE_TEST)
66 default y
67
Michael S. Tsirkin46506da2015-01-15 16:06:26 +020068config VIRTIO_PCI_LEGACY
69 bool "Support for legacy virtio draft 0.9.X and older devices"
70 default y
71 depends on VIRTIO_PCI
Wu Zongyongd89c81692021-10-29 17:14:42 +080072 select VIRTIO_PCI_LIB_LEGACY
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +090073 help
Michael S. Tsirkin46506da2015-01-15 16:06:26 +020074 Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.
75
76 This option enables building a transitional driver, supporting
77 both devices conforming to Virtio 1 specification, and legacy devices.
78 If disabled, you get a slightly smaller, non-transitional driver,
79 with no legacy compatibility.
80
81 So look out into your driveway. Do you have a flying car? If
82 so, you can happily disable this option and virtio will not
83 break. Otherwise, leave it set. Unless you're testing what
84 life will be like in The Future.
85
86 If unsure, say Y.
87
Jason Wangc043b4a2020-03-26 22:01:22 +080088config VIRTIO_VDPA
89 tristate "vDPA driver for virtio devices"
Michael S. Tsirkin58ad1372020-04-12 04:36:55 -040090 depends on VDPA
Jason Wangc043b4a2020-03-26 22:01:22 +080091 select VIRTIO
92 help
93 This driver provides support for virtio based paravirtual
94 device driver over vDPA bus. For this to be useful, you need
95 an appropriate vDPA device implementation that operates on a
96 physical device to allow the datapath of virtio to be
97 offloaded to hardware.
98
99 If unsure, say M.
100
Pankaj Gupta6e842002019-07-05 19:33:23 +0530101config VIRTIO_PMEM
102 tristate "Support for virtio pmem driver"
103 depends on VIRTIO
104 depends on LIBNVDIMM
105 help
106 This driver provides access to virtio-pmem devices, storage devices
107 that are mapped into the physical address space - similar to NVDIMMs
108 - with a virtio-based flushing interface.
109
110 If unsure, say Y.
111
Rusty Russell6b35e402008-02-04 23:50:12 -0500112config VIRTIO_BALLOON
Rusty Russell7a23eb22012-09-28 15:05:14 +0930113 tristate "Virtio balloon driver"
114 depends on VIRTIO
Konstantin Khlebnikov09316c02014-10-09 15:29:32 -0700115 select MEMORY_BALLOON
Alexander Duyckb0c504f2020-04-06 20:05:05 -0700116 select PAGE_REPORTING
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +0900117 help
Rusty Russell6b35e402008-02-04 23:50:12 -0500118 This driver supports increasing and decreasing the amount
119 of memory within a KVM guest.
120
121 If unsure, say M.
122
David Hildenbrand5f1f79b2020-05-07 16:01:25 +0200123config VIRTIO_MEM
124 tristate "Virtio mem driver"
Björn Töpel0546d702024-06-05 13:40:52 +0200125 depends on X86_64 || ARM64 || RISCV
David Hildenbrand5f1f79b2020-05-07 16:01:25 +0200126 depends on VIRTIO
David Hildenbrand50f94812021-11-05 13:44:24 -0700127 depends on MEMORY_HOTPLUG
David Hildenbrand5f1f79b2020-05-07 16:01:25 +0200128 depends on MEMORY_HOTREMOVE
Weilong Chena96b0d02020-06-19 16:03:33 +0800129 depends on CONTIG_ALLOC
David Hildenbrand2128f4e2021-11-08 18:35:53 -0800130 depends on EXCLUSIVE_SYSTEM_RAM
David Hildenbrand5f1f79b2020-05-07 16:01:25 +0200131 help
132 This driver provides access to virtio-mem paravirtualized memory
133 devices, allowing to hotplug and hotunplug memory.
134
David Hildenbrand0b6fd462022-06-10 11:47:37 +0200135 This driver currently only supports x86-64 and arm64. Although it
136 should compile on other architectures that implement memory
137 hot(un)plug, architecture-specific and/or common
138 code changes may be required for virtio-mem, kdump and kexec to work as
139 expected.
David Hildenbrand5f1f79b2020-05-07 16:01:25 +0200140
141 If unsure, say M.
142
Gerd Hoffmann271c8652015-03-27 12:46:12 +1030143config VIRTIO_INPUT
144 tristate "Virtio input driver"
145 depends on VIRTIO
146 depends on INPUT
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +0900147 help
Gerd Hoffmann271c8652015-03-27 12:46:12 +1030148 This driver supports virtio input devices such as
149 keyboards, mice and tablets.
150
151 If unsure, say M.
152
Fabrizio Castro6166e532019-04-03 16:04:09 +0100153config VIRTIO_MMIO
Kees Cookd72c5a82012-10-02 11:19:07 -0700154 tristate "Platform bus driver for memory mapped virtio devices"
Andy Lutomirski780bc792016-02-02 21:46:36 -0800155 depends on HAS_IOMEM && HAS_DMA
Fabrizio Castro6166e532019-04-03 16:04:09 +0100156 select VIRTIO
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +0900157 help
Fabrizio Castro6166e532019-04-03 16:04:09 +0100158 This drivers provides support for memory mapped virtio
Pawel Molledfd52e2011-10-24 14:07:03 +0100159 platform device driver.
160
161 If unsure, say N.
162
Pawel Moll81a054c2012-05-09 18:30:16 +0100163config VIRTIO_MMIO_CMDLINE_DEVICES
164 bool "Memory mapped virtio devices parameter parsing"
165 depends on VIRTIO_MMIO
Masahiro Yamadaa7f7f622020-06-14 01:50:22 +0900166 help
Pawel Moll81a054c2012-05-09 18:30:16 +0100167 Allow virtio-mmio devices instantiation via the kernel command line
168 or module parameters. Be aware that using incorrect parameters (base
169 address in particular) can crash your system - you have been warned.
Mauro Carvalho Chehab8c27ceff32016-10-18 10:12:27 -0200170 See Documentation/admin-guide/kernel-parameters.rst for details.
Pawel Moll81a054c2012-05-09 18:30:16 +0100171
172 If unsure, say 'N'.
173
David Stevens9fe2f892020-08-19 12:10:11 +0900174config VIRTIO_DMA_SHARED_BUFFER
175 tristate
176 depends on DMA_SHARED_BUFFER
177 help
178 This option adds a flavor of dma buffers that are backed by
179 virtio resources.
180
Jiri Pirko96a83262024-04-24 12:40:45 +0200181config VIRTIO_DEBUG
182 bool "Debug facilities"
183 depends on VIRTIO
184 help
185 Enable this to expose debug facilities over debugfs.
186 This allows to debug features, to see what features the device
187 advertises and to set filter for features used by driver.
188
189 If unsure, say N.
190
Vincent Legoll7b95fec2018-01-07 12:33:56 +0100191endif # VIRTIO_MENU