.TP
.B -O <param>=<value>
The behavior of the library is controlled by several named parameters.
-This option allows to set the value of any of the parameters. Use \fB-O help\fP
+This option allows one to set the value of any of the parameters. Use \fB-O help\fP
for a list of known parameters and their default values.
.TP
.B -H1
.TP
.B Module
Kernel module reporting that it is capable of handling the device
-(optional, Linux only).
+(optional, Linux only). Multiple lines with this tag can occur.
.TP
.B NUMANode
NUMA node this device is connected to (optional, Linux only).
+.TP
+.B IOMMUGroup
+IOMMU group that this device is part of (optional, Linux only).
+
.P
New tags can be added in future versions, so you should silently ignore any tags you don't recognize.