Re: [Xen-devel] port 80 pass-through to HVM guests

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

I think I would go with the DMI approach, as passing through port 0x80 has
some significant HVM guest boot-time wins IIRC.

 -- Keir

On 10/06/2009 13:20, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> In a recent commit (99f85a28a78e96d28907fe036e1671a218fee597), KVM
> disabled the passthrough of this port due to known problems on certain HP
> laptops (see http://lkml.indiana.edu/hypermail/linux/kernel/0712.3/0872.html
> and http://lkml.indiana.edu/hypermail/linux/kernel/0801.0/2388.html). While
> I'd say that doing this globally just because of laptops may not be the right
> thing in Xen, it would seem that a DMI based approach like is being used in
> recent kernels (to replace the use of port 0x80 with 0xED) might still be
> desirable.
> 
> Opinions?
> 
> Thanks, Jan
> 
> 
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