Xen users - Oct 2008 - Howto use the serialport in domU (windows 2003 server)

Hello,

I just googled around since a day and I can''t find a working solution
to get
the serial port to work under my domU (running windows server 2003). I want 
to use my external faxmodem from windows to receive incoming fax-calls from 
this machine.
What I''ve done so far:

--- cut
grub.conf 
kernel /boot/xen.gz
module /boot/kernel-xen xencons=off root=/dev/ram0 init=/linuxrc 
real_root=/dev/dm-1 dodmraid 
module /boot/initramfs-xen
--- cut

I enabled the 8250 driver in my kernel (I needed to disable the "XEN -> 
Disable serial port drivers" option in my 2.6.21-xen kernel for this)

--- cut
# dmesg | grep tty
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
00:0d: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:0e: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
--- cut

and I finally changed my domU config to this:

--- cut
# cat /mnt/data/xen/configs/windows
kernel = ''/usr/lib/xen/boot/hvmloader''
builder = ''hvm''
memory = ''1024''
cpus   = "0"
device_model=''/usr/lib/xen/bin/qemu-dm''
disk = [ ''phy:/dev/mapper/vg-windows,hda,w'',
         ''phy:/dev/cdrom,hdb:cdrom,r'' ]
serial = "/dev/ttyS0"
name = ''windows''
vif = [''type=ioemu, bridge=xenbr0'']
boot="cd"
keymap=''de''
vnc=1
vncviewer=0
sdl=0
--- cut

unfortunately - it doesn''t work :/ Windows isn''t able to use
the serial port.
Do I miss something? Is there any debug-output I can review to see any kinds 
of problems?

Regards,
Martin

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On Thu, Oct 23, 2008 at 9:04 AM, Martin Fernau <m.fernau@cps-net.de>
wrote:
> Hello,
>
> I just googled around since a day and I can''t find a working
solution to get
> the serial port to work under my domU (running windows server 2003). I want
> to use my external faxmodem from windows to receive incoming fax-calls from
> this machine.
I had a similar requirement, we needed a modem on our windows terminal
server for dialup access to a remote network, I could not get serial
port to work under Xen so I used a Tibbo DS202 (www.tibbo.com) to
access the modem over tcp/ip network.

Andy
> What I''ve done so far:
>
> --- cut
> grub.conf
> kernel /boot/xen.gz
> module /boot/kernel-xen xencons=off root=/dev/ram0 init=/linuxrc
> real_root=/dev/dm-1 dodmraid
> module /boot/initramfs-xen
> --- cut
>
> I enabled the 8250 driver in my kernel (I needed to disable the "XEN
->
> Disable serial port drivers" option in my 2.6.21-xen kernel for this)
>
> --- cut
> # dmesg | grep tty
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> 00:0d: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 00:0e: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> --- cut
>
> and I finally changed my domU config to this:
>
> --- cut
> # cat /mnt/data/xen/configs/windows
> kernel = ''/usr/lib/xen/boot/hvmloader''
> builder = ''hvm''
> memory = ''1024''
> cpus   = "0"
> device_model=''/usr/lib/xen/bin/qemu-dm''
> disk = [ ''phy:/dev/mapper/vg-windows,hda,w'',
>         ''phy:/dev/cdrom,hdb:cdrom,r'' ]
> serial = "/dev/ttyS0"
> name = ''windows''
> vif = [''type=ioemu, bridge=xenbr0'']
> boot="cd"
> keymap=''de''
> vnc=1
> vncviewer=0
> sdl=0
> --- cut
>
> unfortunately - it doesn''t work :/ Windows isn''t able to
use the serial port.
> Do I miss something? Is there any debug-output I can review to see any
kinds
> of problems?
>
> Regards,
> Martin
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
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Uhm - expansive stuff only for using my faxmodem. Hmm... 
And with this device you can call your modem like any other locally installed 
modem from your domU windows box? Just as it were connected directly?

Martin

Am Donnerstag, 23. Oktober 2008 schrieb Andrew Lyon:
> On Thu, Oct 23, 2008 at 9:04 AM, Martin Fernau <m.fernau@cps-net.de>
wrote:
> > Hello,
> >
> > I just googled around since a day and I can''t find a working
solution to
> > get the serial port to work under my domU (running windows server
2003).
> > I want to use my external faxmodem from windows to receive incoming
> > fax-calls from this machine.
>
> I had a similar requirement, we needed a modem on our windows terminal
> server for dialup access to a remote network, I could not get serial
> port to work under Xen so I used a Tibbo DS202 (www.tibbo.com) to
> access the modem over tcp/ip network.
>
> Andy
>
> > What I''ve done so far:
> >
> > --- cut
> > grub.conf
> > kernel /boot/xen.gz
> > module /boot/kernel-xen xencons=off root=/dev/ram0 init=/linuxrc
> > real_root=/dev/dm-1 dodmraid
> > module /boot/initramfs-xen
> > --- cut
> >
> > I enabled the 8250 driver in my kernel (I needed to disable the
"XEN ->
> > Disable serial port drivers" option in my 2.6.21-xen kernel for
this)
> >
> > --- cut
> > # dmesg | grep tty
> > serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> > serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> > 00:0d: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> > 00:0e: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> > --- cut
> >
> > and I finally changed my domU config to this:
> >
> > --- cut
> > # cat /mnt/data/xen/configs/windows
> > kernel = ''/usr/lib/xen/boot/hvmloader''
> > builder = ''hvm''
> > memory = ''1024''
> > cpus   = "0"
> > device_model=''/usr/lib/xen/bin/qemu-dm''
> > disk = [ ''phy:/dev/mapper/vg-windows,hda,w'',
> >         ''phy:/dev/cdrom,hdb:cdrom,r'' ]
> > serial = "/dev/ttyS0"
> > name = ''windows''
> > vif = [''type=ioemu, bridge=xenbr0'']
> > boot="cd"
> > keymap=''de''
> > vnc=1
> > vncviewer=0
> > sdl=0
> > --- cut
> >
> > unfortunately - it doesn''t work :/ Windows isn''t
able to use the serial
> > port. Do I miss something? Is there any debug-output I can review to
see
> > any kinds of problems?
> >
> > Regards,
> > Martin
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
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