Re: [Xen-users] Is Xen and Qemu serial driver code related ?

["Henning Sprang" <henning_sprang@xxxxxx>]

On 2/8/07, Aleš Rom <ales.rom@xxxxxxxxxxxx> wrote:
> Hi.
>
> A noticed a very strange thing. A few weeks ago I installed WindowsXP
> under qemu. I have serial device attached to COM1 port and comunication
> works.
> Basicaly I have to download a few hundred bytes from that serial device
> to computer. Every time comunication stops at 83% (5/6).
>
> The weird thing is, that when I use Xen, I can see exactly same thing.
> Stops at 83%. Is this related or just coincidence? Is it my hardware?
> Windows on "real" hardware doesn't have this problem.
I don't too much about the details of serial consoles in Xen and Qemu,
but I know that Xen uses qemu code to emulate the parts that currently
aren't included in hardware supported virtualization - which is
everything but memory(right?) and CPU.
As long as you don't install paravirtual IO drivers in windows (which
AFAIK you get with XenEnterprise products), you use qemu-derived IO
emulation. Likely that this is also valid for serial ports, and so you
see the same problems.

Henning

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users