Yes we use it.   It is just a command line option to the kernel.  I
bolded the one I think you want.

 

UML command line: /opt/alp-dev/bin/alp-linux ro mem=512M root=/dev/root
rootflags=/scratchbox/users/david/targets/alp-x86-dbg-dev
rootfstype=hostfs ssl0=tty:/dev/ttyS0 eth0=tuntap,tap0,,192.168.3.101
eth1=daemon,,unix,/tmp/alp_sim.ctl xdisplay=:2
LOG=/home/david/alp-simulator
ubdc=/home/david/.alp-dev/simulator/var-alp-x86-dbg-dev.ext3
geometry=480x854 NO_MODMAP=1 umid=ALP con0=xterm
xterm=gnome-terminal,-t,-x

 

From: David Francisco Rodriguez Perez
[mailto:david.francisco.rodrig...@gmail.com] 
Sent: Friday, October 30, 2009 3:26 PM
To: user-mode-linux-user@lists.sourceforge.net
Subject: [uml-user] Mapping a physical serial port to UML

 

Hi All

Does anybody has mapped a physical serial port on the HOST to a guest
UML ?

Thanks

David

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