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151 lines
4.2 KiB
151 lines
4.2 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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config VIRTIO |
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tristate |
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help |
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This option is selected by any driver which implements the virtio |
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bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG |
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or CONFIG_S390_GUEST. |
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config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS |
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bool |
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help |
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This option is selected if the architecture may need to enforce |
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VIRTIO_F_ACCESS_PLATFORM |
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config VIRTIO_PCI_LIB |
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tristate |
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help |
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Modern PCI device implementation. This module implements the |
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basic probe and control for devices which are based on modern |
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PCI device with possible vendor specific extensions. Any |
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module that selects this module must depend on PCI. |
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menuconfig VIRTIO_MENU |
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bool "Virtio drivers" |
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default y |
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if VIRTIO_MENU |
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config VIRTIO_PCI |
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tristate "PCI driver for virtio devices" |
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depends on PCI |
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select VIRTIO_PCI_LIB |
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select VIRTIO |
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help |
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This driver provides support for virtio based paravirtual device |
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drivers over PCI. This requires that your VMM has appropriate PCI |
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virtio backends. Most QEMU based VMMs should support these devices |
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(like KVM or Xen). |
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If unsure, say M. |
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config VIRTIO_PCI_LEGACY |
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bool "Support for legacy virtio draft 0.9.X and older devices" |
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default y |
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depends on VIRTIO_PCI |
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help |
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Virtio PCI Card 0.9.X Draft (circa 2014) and older device support. |
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This option enables building a transitional driver, supporting |
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both devices conforming to Virtio 1 specification, and legacy devices. |
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If disabled, you get a slightly smaller, non-transitional driver, |
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with no legacy compatibility. |
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So look out into your driveway. Do you have a flying car? If |
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so, you can happily disable this option and virtio will not |
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break. Otherwise, leave it set. Unless you're testing what |
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life will be like in The Future. |
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If unsure, say Y. |
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config VIRTIO_VDPA |
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tristate "vDPA driver for virtio devices" |
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depends on VDPA |
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select VIRTIO |
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help |
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This driver provides support for virtio based paravirtual |
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device driver over vDPA bus. For this to be useful, you need |
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an appropriate vDPA device implementation that operates on a |
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physical device to allow the datapath of virtio to be |
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offloaded to hardware. |
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If unsure, say M. |
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config VIRTIO_PMEM |
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tristate "Support for virtio pmem driver" |
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depends on VIRTIO |
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depends on LIBNVDIMM |
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help |
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This driver provides access to virtio-pmem devices, storage devices |
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that are mapped into the physical address space - similar to NVDIMMs |
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- with a virtio-based flushing interface. |
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If unsure, say Y. |
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config VIRTIO_BALLOON |
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tristate "Virtio balloon driver" |
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depends on VIRTIO |
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select MEMORY_BALLOON |
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select PAGE_REPORTING |
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help |
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This driver supports increasing and decreasing the amount |
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of memory within a KVM guest. |
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If unsure, say M. |
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config VIRTIO_MEM |
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tristate "Virtio mem driver" |
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default m |
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depends on X86_64 |
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depends on VIRTIO |
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depends on MEMORY_HOTPLUG_SPARSE |
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depends on MEMORY_HOTREMOVE |
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depends on CONTIG_ALLOC |
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help |
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This driver provides access to virtio-mem paravirtualized memory |
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devices, allowing to hotplug and hotunplug memory. |
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This driver was only tested under x86-64, but should theoretically |
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work on all architectures that support memory hotplug and hotremove. |
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If unsure, say M. |
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config VIRTIO_INPUT |
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tristate "Virtio input driver" |
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depends on VIRTIO |
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depends on INPUT |
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help |
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This driver supports virtio input devices such as |
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keyboards, mice and tablets. |
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If unsure, say M. |
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config VIRTIO_MMIO |
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tristate "Platform bus driver for memory mapped virtio devices" |
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depends on HAS_IOMEM && HAS_DMA |
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select VIRTIO |
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help |
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This drivers provides support for memory mapped virtio |
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platform device driver. |
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If unsure, say N. |
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config VIRTIO_MMIO_CMDLINE_DEVICES |
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bool "Memory mapped virtio devices parameter parsing" |
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depends on VIRTIO_MMIO |
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help |
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Allow virtio-mmio devices instantiation via the kernel command line |
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or module parameters. Be aware that using incorrect parameters (base |
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address in particular) can crash your system - you have been warned. |
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See Documentation/admin-guide/kernel-parameters.rst for details. |
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If unsure, say 'N'. |
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config VIRTIO_DMA_SHARED_BUFFER |
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tristate |
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depends on DMA_SHARED_BUFFER |
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help |
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This option adds a flavor of dma buffers that are backed by |
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virtio resources. |
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endif # VIRTIO_MENU
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