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