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xen-users
Re: [Xen-users] How to Export COM port to guest domain
On Thu, May 15, 2008 at 2:59 PM, Jefferson E. Noxon < jeff@xxxxxxxxxxxxxx> wrote:
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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I installed mythtv but needed a way to control the motorola dvr via serial cable (usb to serial). The way I managed to get this to work is to use ssh remote command execution. Basically, the domU executes a script that runs in the dom0 to change channels. I dont know if something similar would apply to your case.
Chris
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