xen —
Xen domU nexus device
xen0 at pvbus?
xen driver performs HVM domU guest
initialization, provides abstraction for virtual Xen interrupts, access to the
XenStore configuration storage as well as a device probing facility for
paravirtualized devices such as disk and network interfaces.
When running under XenServer, to let the host know that the guest has finished
initializing and to allow graceful shutdown, set the following XenStore
properties with
hostctl(8) in
rc.local(8):
ostype=$(sysctl -n kern.ostype)
osrelease=$(sysctl -n kern.osrelease)
# XenServer Tools version
hostctl attr/PVAddons/MajorVersion 6
hostctl attr/PVAddons/MinorVersion 2
hostctl attr/PVAddons/MicroVersion 0
hostctl attr/PVAddons/BuildVersion 76888
hostctl attr/PVAddons/Installed 1
# OS version
hostctl data/os_name "$ostype $osrelease"
hostctl data/os_uname $osrelease
hostctl data/os_distro $ostype
# Update XenStore
hostctl data/updated 1
autoconf(4),
intro(4),
pvbus(4)
The
xen driver first appeared in
OpenBSD 5.9.
The
xen driver was written by
Mike Belopuhov
<
mikeb@openbsd.org>
from scratch, inspired by the
FreeBSD
implementation.
![[OpenBSD]](/openbsd.gif){kind=small}