1# SPDX-License-Identifier: GPL-2.0-only 2config 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 9menuconfig VIRTIO_MENU 10 bool "Virtio drivers" 11 default y 12 13if VIRTIO_MENU 14 15config 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 27config 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 46config VIRTIO_VDPA 47 tristate "vDPA driver for virtio devices" 48 depends on VDPA 49 select VIRTIO 50 help 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. 56 57 If unsure, say M. 58 59config VIRTIO_PMEM 60 tristate "Support for virtio pmem driver" 61 depends on VIRTIO 62 depends on LIBNVDIMM 63 help 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. 67 68 If unsure, say Y. 69 70config VIRTIO_BALLOON 71 tristate "Virtio balloon driver" 72 depends on VIRTIO 73 select MEMORY_BALLOON 74 select PAGE_REPORTING 75 help 76 This driver supports increasing and decreasing the amount 77 of memory within a KVM guest. 78 79 If unsure, say M. 80 81config VIRTIO_MEM 82 tristate "Virtio mem driver" 83 default m 84 depends on X86_64 85 depends on VIRTIO 86 depends on MEMORY_HOTPLUG_SPARSE 87 depends on MEMORY_HOTREMOVE 88 depends on CONTIG_ALLOC 89 help 90 This driver provides access to virtio-mem paravirtualized memory 91 devices, allowing to hotplug and hotunplug memory. 92 93 This driver was only tested under x86-64, but should theoretically 94 work on all architectures that support memory hotplug and hotremove. 95 96 If unsure, say M. 97 98config VIRTIO_INPUT 99 tristate "Virtio input driver" 100 depends on VIRTIO 101 depends on INPUT 102 help 103 This driver supports virtio input devices such as 104 keyboards, mice and tablets. 105 106 If unsure, say M. 107 108config VIRTIO_MMIO 109 tristate "Platform bus driver for memory mapped virtio devices" 110 depends on HAS_IOMEM && HAS_DMA 111 select VIRTIO 112 help 113 This drivers provides support for memory mapped virtio 114 platform device driver. 115 116 If unsure, say N. 117 118config VIRTIO_MMIO_CMDLINE_DEVICES 119 bool "Memory mapped virtio devices parameter parsing" 120 depends on VIRTIO_MMIO 121 help 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. 126 127 If unsure, say 'N'. 128 129config VIRTIO_DMA_SHARED_BUFFER 130 tristate 131 depends on DMA_SHARED_BUFFER 132 help 133 This option adds a flavor of dma buffers that are backed by 134 virtio resources. 135 136endif # VIRTIO_MENU 137