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_PMEM 47 tristate "Support for virtio pmem driver" 48 depends on VIRTIO 49 depends on LIBNVDIMM 50 help 51 This driver provides access to virtio-pmem devices, storage devices 52 that are mapped into the physical address space - similar to NVDIMMs 53 - with a virtio-based flushing interface. 54 55 If unsure, say Y. 56 57config VIRTIO_BALLOON 58 tristate "Virtio balloon driver" 59 depends on VIRTIO 60 select MEMORY_BALLOON 61 ---help--- 62 This driver supports increasing and decreasing the amount 63 of memory within a KVM guest. 64 65 If unsure, say M. 66 67config VIRTIO_INPUT 68 tristate "Virtio input driver" 69 depends on VIRTIO 70 depends on INPUT 71 ---help--- 72 This driver supports virtio input devices such as 73 keyboards, mice and tablets. 74 75 If unsure, say M. 76 77config VIRTIO_MMIO 78 tristate "Platform bus driver for memory mapped virtio devices" 79 depends on HAS_IOMEM && HAS_DMA 80 select VIRTIO 81 ---help--- 82 This drivers provides support for memory mapped virtio 83 platform device driver. 84 85 If unsure, say N. 86 87config VIRTIO_MMIO_CMDLINE_DEVICES 88 bool "Memory mapped virtio devices parameter parsing" 89 depends on VIRTIO_MMIO 90 ---help--- 91 Allow virtio-mmio devices instantiation via the kernel command line 92 or module parameters. Be aware that using incorrect parameters (base 93 address in particular) can crash your system - you have been warned. 94 See Documentation/admin-guide/kernel-parameters.rst for details. 95 96 If unsure, say 'N'. 97 98endif # VIRTIO_MENU 99