concurrent use of any particular testbed.
.SH OPTIONS
.TP
-.BR \-d " | " \-\-debug
-Enables debugging output. Probably not hugely interesting.
+.BI --distro= distro
+Specifies a different distro (ie, the use of a different testbed).
+.TP
+.BI --nominum= nominum
+Specifies a different nominum (ie, the use of a different testbed).
+.TP
+.BR \-\-userv
+Specifies that the adt-xenlvm tools should not be run directly, but
+rather via userv. The calling user must be permitted to use
+.BR "userv root adt-xenlvm-testbed" .
+In the default configuration, this means being a member of the
+.B AdtXenUs
+group.
.TP
.BI "-- --" adt-xenlvm-option = adt-xenlvm-value
Following the first occurrence of
on the
.B adt-virt-xenlvm
commandline, any of the values in the adt-xenlvm configuration may be
-set in the usual way. In particular,
-.BI --nominum= nominum
-can be used to specify the use of a different testbed.
+set in the usual way. The arguments are simply passed to
+\fBadt-virt-xenlvm\fR.
See \fB/usr/share/doc/autopkgtest-xenlvm/README.gz\fR for full details
of adt-xenlvm.
+.TP
+.BI "-- -D" varname = value
+If \fB\-\-userv\fR was specified, options following the first
+.B --
+on the
+.B adt-virt-xenlvm
+commandline are passed as option arguments to \fBuserv\fR. These
+should normally be user-defined variable settings using \fB-D\fR which
+are expected by the \fBautopkgtest-xenlvm/userv-target\fR script.
+Currently only \fBdistro\fR and \fBnominum\fR are expected, and these
+can be set using \fBadt-virt-xenlvm\fR's own options.
+.TP
+.BR \-d " | " \-\-debug
+Enables debugging output. Probably not hugely interesting.
.SH INPUT, OUTPUT AND EXIT STATUS
The behaviour of
.B adt-virt-xenlvm