# SPDX-License-Identifier: GPL-2.0-only config FUSE_FS tristate "FUSE (Filesystem in Userspace) support" select FS_POSIX_ACL help With FUSE it is possible to implement a fully functional filesystem in a userspace program. There's also a companion library: libfuse2. This library is available from the FUSE homepage: <https://github.com/libfuse/> although chances are your distribution already has that library installed if you've installed the "fuse" package itself. See <file:Documentation/filesystems/fuse.rst> for more information. See <file:Documentation/Changes> for needed library/utility version. If you want to develop a userspace FS, or if you want to use a filesystem based on FUSE, answer Y or M. config CUSE tristate "Character device in Userspace support" depends on FUSE_FS help This FUSE extension allows character devices to be implemented in userspace. If you want to develop or use a userspace character device based on CUSE, answer Y or M. config VIRTIO_FS tristate "Virtio Filesystem" depends on FUSE_FS select VIRTIO help The Virtio Filesystem allows guests to mount file systems from the host. If you want to share files between guests or with the host, answer Y or M. config FUSE_DAX bool "Virtio Filesystem Direct Host Memory Access support" default y select INTERVAL_TREE depends on VIRTIO_FS depends on FS_DAX depends on DAX_DRIVER help This allows bypassing guest page cache and allows mapping host page cache directly in guest address space. If you want to allow mounting a Virtio Filesystem with the "dax" option, answer Y.