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_INPUT 82 tristate "Virtio input driver" 83 depends on VIRTIO 84 depends on INPUT 85 ---help--- 86 This driver supports virtio input devices such as 87 keyboards, mice and tablets. 88 89 If unsure, say M. 90 91config VIRTIO_MMIO 92 tristate "Platform bus driver for memory mapped virtio devices" 93 depends on HAS_IOMEM && HAS_DMA 94 select VIRTIO 95 ---help--- 96 This drivers provides support for memory mapped virtio 97 platform device driver. 98 99 If unsure, say N. 100 101config VIRTIO_MMIO_CMDLINE_DEVICES 102 bool "Memory mapped virtio devices parameter parsing" 103 depends on VIRTIO_MMIO 104 ---help--- 105 Allow virtio-mmio devices instantiation via the kernel command line 106 or module parameters. Be aware that using incorrect parameters (base 107 address in particular) can crash your system - you have been warned. 108 See Documentation/admin-guide/kernel-parameters.rst for details. 109 110 If unsure, say 'N'. 111 112endif # VIRTIO_MENU 113