XEN(4)

NAME
xen - Xen domU nexus device

SYNOPSIS
xen0 at pvbus?

DESCRIPTION
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
    # Inform Xen of IPs bound to the VM
    hostctl attr/vif/0/ipv4/0 192.0.2.1
    hostctl attr/vif/0/ipv6/0 2001:db8::1
    # Update XenStore
    hostctl data/updated 1

SEE ALSO
autoconf(4), intro(4), pvbus(4)

HISTORY
The xen driver first appeared in OpenBSD 5.9.

AUTHORS
The xen driver was written by Mike Belopuhov <mikeb@openbsd.org> from scratch, inspired by the FreeBSD implementation.