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 select 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 ---help--- 75 This driver supports increasing and decreasing the amount 76 of memory within a KVM guest. 77 78 If unsure, say M. 79 80config VIRTIO_INPUT 81 tristate "Virtio input driver" 82 depends on VIRTIO 83 depends on INPUT 84 ---help--- 85 This driver supports virtio input devices such as 86 keyboards, mice and tablets. 87 88 If unsure, say M. 89 90config VIRTIO_MMIO 91 tristate "Platform bus driver for memory mapped virtio devices" 92 depends on HAS_IOMEM && HAS_DMA 93 select VIRTIO 94 ---help--- 95 This drivers provides support for memory mapped virtio 96 platform device driver. 97 98 If unsure, say N. 99 100config VIRTIO_MMIO_CMDLINE_DEVICES 101 bool "Memory mapped virtio devices parameter parsing" 102 depends on VIRTIO_MMIO 103 ---help--- 104 Allow virtio-mmio devices instantiation via the kernel command line 105 or module parameters. Be aware that using incorrect parameters (base 106 address in particular) can crash your system - you have been warned. 107 See Documentation/admin-guide/kernel-parameters.rst for details. 108 109 If unsure, say 'N'. 110 111endif # VIRTIO_MENU 112 113source "drivers/virtio/vdpa/Kconfig" 114