Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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