Kconfig

  1# SPDX-License-Identifier: GPL-2.0-only
  2config VHOST_IOTLB
  3	tristate
  4	help
  5	  Generic IOTLB implementation for vhost and vringh.
  6	  This option is selected by any driver which needs to support
  7	  an IOMMU in software.
  8
  9config VHOST_RING
 10	tristate
 11	select VHOST_IOTLB
 12	help
 13	  This option is selected by any driver which needs to access
 14	  the host side of a virtio ring.
 15
 16config VHOST_TASK
 17	bool
 18	default n
 19
 20config VHOST
 21	tristate
 22	select VHOST_IOTLB
 23	select VHOST_TASK
 24	help
 25	  This option is selected by any driver which needs to access
 26	  the core of vhost.
 27
 28menuconfig VHOST_MENU
 29	bool "VHOST drivers"
 30	default y
 31
 32if VHOST_MENU
 33
 34config VHOST_NET
 35	tristate "Host kernel accelerator for virtio net"
 36	depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP)
 37	select VHOST
 38	help
 39	  This kernel module can be loaded in host kernel to accelerate
 40	  guest networking with virtio_net. Not to be confused with virtio_net
 41	  module itself which needs to be loaded in guest kernel.
 42
 43	  To compile this driver as a module, choose M here: the module will
 44	  be called vhost_net.
 45
 46config VHOST_SCSI
 47	tristate "VHOST_SCSI TCM fabric driver"
 48	depends on TARGET_CORE && EVENTFD
 49	select VHOST
 50	select SG_POOL
 51	default n
 52	help
 53	Say M here to enable the vhost_scsi TCM fabric module
 54	for use with virtio-scsi guests
 55
 56config VHOST_VSOCK
 57	tristate "vhost virtio-vsock driver"
 58	depends on VSOCKETS && EVENTFD
 59	select VHOST
 60	select VIRTIO_VSOCKETS_COMMON
 61	default n
 62	help
 63	This kernel module can be loaded in the host kernel to provide AF_VSOCK
 64	sockets for communicating with guests.  The guests must have the
 65	virtio_transport.ko driver loaded to use the virtio-vsock device.
 66
 67	To compile this driver as a module, choose M here: the module will be called
 68	vhost_vsock.
 69
 70config VHOST_VDPA
 71	tristate "Vhost driver for vDPA-based backend"
 72	depends on EVENTFD
 73	select VHOST
 74	select IRQ_BYPASS_MANAGER
 75	depends on VDPA
 76	help
 77	  This kernel module can be loaded in host kernel to accelerate
 78	  guest virtio devices with the vDPA-based backends.
 79
 80	  To compile this driver as a module, choose M here: the module
 81	  will be called vhost_vdpa.
 82
 83config VHOST_CROSS_ENDIAN_LEGACY
 84	bool "Cross-endian support for vhost"
 85	default n
 86	help
 87	  This option allows vhost to support guests with a different byte
 88	  ordering from host while using legacy virtio.
 89
 90	  Userspace programs can control the feature using the
 91	  VHOST_SET_VRING_ENDIAN and VHOST_GET_VRING_ENDIAN ioctls.
 92
 93	  This is only useful on a few platforms (ppc64 and arm64). Since it
 94	  adds some overhead, it is disabled by default.
 95
 96	  If unsure, say "N".
 97
 98config VHOST_ENABLE_FORK_OWNER_CONTROL
 99	bool "Enable VHOST_ENABLE_FORK_OWNER_CONTROL"
100	default y
101	help
102	  This option enables two IOCTLs: VHOST_SET_FORK_FROM_OWNER and
103	  VHOST_GET_FORK_FROM_OWNER. These allow userspace applications
104	  to modify the vhost worker mode for vhost devices.
105
106	  Also expose module parameter 'fork_from_owner_default' to allow users
107	  to configure the default mode for vhost workers.
108
109	  By default, `VHOST_ENABLE_FORK_OWNER_CONTROL` is set to `y`,
110	  users can change the worker thread mode as needed.
111	  If this config is disabled (n),the related IOCTLs and parameters will
112	  be unavailable.
113
114	  If unsure, say "Y".
115
116endif