Re: [Xen-users] How to Export COM port to guest domain

["Jefferson E. Noxon" <jeff@xxxxxxxxxxxxxx>]

I've run into the same problem, except that I need to provide serial 
ports to a fully virtualized Windows guest.
This is my understanding:

You need Xen 3.2+, VT-d capable hardware, and PCI passthrough, and 
probably a PCI-e serial adapter or a PCI-e USB adapter with a USB to 
Serial dongle.  VT-d won't let you pass through a legacy (non-Express) 
PCI device without passing all of your other legacy PCI devices behind 
the same bridge.
It's a shame that it isn't possible to pass USB or Serial devices 
without VT-d.
I plan to get a PCI-e USB controller and a VT-d capable motherboard soon.

I hope someone proves me wrong!

Johnson, Tony M wrote:
> Greetings,
>
> Using Xen 3.1 and Fedora 7, is it possible to export the serial 
> interface such that I can access
> external devices on COM1 or COM2?
>
> I am uncertain if PCI pass-thru is needed or if there's nothing to 
> configure for this to work in
> a fully virtualized Linux guest.
>
> Any help would be greatly appreciated.
>
> Regards,
> Tony Johnson
>
>
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