[linux-2.6-block.git] / drivers / virtio / Kconfig

# SPDX-License-Identifier: GPL-2.0-only
config VIRTIO
	tristate
	---help---
	  This option is selected by any driver which implements the virtio
	  bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
	  or CONFIG_S390_GUEST.

menuconfig VIRTIO_MENU
	bool "Virtio drivers"
	default y

if VIRTIO_MENU

config VIRTIO_PCI
	tristate "PCI driver for virtio devices"
	depends on PCI
	select VIRTIO
	---help---
	  This driver provides support for virtio based paravirtual device
	  drivers over PCI.  This requires that your VMM has appropriate PCI
	  virtio backends.  Most QEMU based VMMs should support these devices
	  (like KVM or Xen).

	  If unsure, say M.

config VIRTIO_PCI_LEGACY
	bool "Support for legacy virtio draft 0.9.X and older devices"
	default y
	depends on VIRTIO_PCI
	---help---
          Virtio PCI Card 0.9.X Draft (circa 2014) and older device support.

	  This option enables building a transitional driver, supporting
	  both devices conforming to Virtio 1 specification, and legacy devices.
	  If disabled, you get a slightly smaller, non-transitional driver,
	  with no legacy compatibility.

          So look out into your driveway.  Do you have a flying car?  If
          so, you can happily disable this option and virtio will not
          break.  Otherwise, leave it set.  Unless you're testing what
          life will be like in The Future.

	  If unsure, say Y.

config VIRTIO_VDPA
	tristate "vDPA driver for virtio devices"
	depends on VDPA
	select VIRTIO
	help
	  This driver provides support for virtio based paravirtual
	  device driver over vDPA bus. For this to be useful, you need
	  an appropriate vDPA device implementation that operates on a
	  physical device to allow the datapath of virtio to be
	  offloaded to hardware.

	  If unsure, say M.

config VIRTIO_PMEM
	tristate "Support for virtio pmem driver"
	depends on VIRTIO
	depends on LIBNVDIMM
	help
	  This driver provides access to virtio-pmem devices, storage devices
	  that are mapped into the physical address space - similar to NVDIMMs
	   - with a virtio-based flushing interface.

	  If unsure, say Y.

config VIRTIO_BALLOON
	tristate "Virtio balloon driver"
	depends on VIRTIO
	select MEMORY_BALLOON
	select PAGE_REPORTING
	---help---
	 This driver supports increasing and decreasing the amount
	 of memory within a KVM guest.

	 If unsure, say M.

config VIRTIO_INPUT
	tristate "Virtio input driver"
	depends on VIRTIO
	depends on INPUT
	---help---
	 This driver supports virtio input devices such as
	 keyboards, mice and tablets.

	 If unsure, say M.

config VIRTIO_MMIO
	tristate "Platform bus driver for memory mapped virtio devices"
	depends on HAS_IOMEM && HAS_DMA
	select VIRTIO
	---help---
	 This drivers provides support for memory mapped virtio
	 platform device driver.

 	 If unsure, say N.

config VIRTIO_MMIO_CMDLINE_DEVICES
	bool "Memory mapped virtio devices parameter parsing"
	depends on VIRTIO_MMIO
	---help---
	 Allow virtio-mmio devices instantiation via the kernel command line
	 or module parameters. Be aware that using incorrect parameters (base
	 address in particular) can crash your system - you have been warned.
	 See Documentation/admin-guide/kernel-parameters.rst for details.

	 If unsure, say 'N'.

endif # VIRTIO_MENU
Commit	Line	Data
ec8f24b7	1	# SPDX-License-Identifier: GPL-2.0-only
ec3d41c4	2	config VIRTIO
c6fd4701	3	tristate
387daf17 RR	4	---help---
387daf17 RR	5	This option is selected by any driver which implements the virtio
ecda85e7 JG	6	bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
ecda85e7 JG	7	or CONFIG_S390_GUEST.
0a8a69dd	8
7b95fec6 VL	9	menuconfig VIRTIO_MENU
	10	bool "Virtio drivers"
	11	default y
	12
	13	if VIRTIO_MENU
e7254219	14
3343660d	15	config VIRTIO_PCI
d72c5a8c KC	16	tristate "PCI driver for virtio devices"
d72c5a8c KC	17	depends on PCI
3343660d	18	select VIRTIO
3343660d	19	---help---
b2a6d51d	20	This driver provides support for virtio based paravirtual device
3343660d AL	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
3343660d AL	25	If unsure, say M.
3343660d AL	26
46506da5 MT	27	config 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
c043b4a8 JW	46	config VIRTIO_VDPA
c043b4a8 JW	47	tristate "vDPA driver for virtio devices"
58ad1372	48	depends on VDPA
c043b4a8 JW	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
6e84200c PG	59	config 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
6b35e407	70	config VIRTIO_BALLOON
7a23eb28 RR	71	tristate "Virtio balloon driver"
7a23eb28 RR	72	depends on VIRTIO
09316c09	73	select MEMORY_BALLOON
b0c504f1	74	select PAGE_REPORTING
6b35e407 RR	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
271c8651 GH	81	config 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
6166e533	91	config VIRTIO_MMIO
d72c5a8c	92	tristate "Platform bus driver for memory mapped virtio devices"
780bc790	93	depends on HAS_IOMEM && HAS_DMA
6166e533 FC	94	select VIRTIO
	95	---help---
	96	This drivers provides support for memory mapped virtio
edfd52e6 PM	97	platform device driver.
	98
	99	If unsure, say N.
	100
81a054ce PM	101	config 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.
8c27ceff	108	See Documentation/admin-guide/kernel-parameters.rst for details.
81a054ce PM	109
	110	If unsure, say 'N'.
	111
7b95fec6	112	endif # VIRTIO_MENU