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[Xen-users] Re: AMD-V or VT

  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Brian P. Martin" <Brian@xxxxxxxxxxxxxxxxxxxx>
  • Date: Sat, 8 Aug 2009 13:11:46 -0700
  • Delivery-date: Sat, 08 Aug 2009 13:12:34 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcoYWoWJJxxUXlDqQY+rlacaKlURfAACMgfg

> > It's exactly the other way around, you'll need VT-d (which is a chipset
> feature, NOT a cpu feature) to passthrough PCI(e) device to HVM guests.
> For PV guests VT-d is not needed (not even VT for that matter)...

Just to make sure I'm clear on this ... you're saying that unless I have
VT-d, there is no way I'm going to give a fully virtualized guest direct
access to a parallel port of any kind (either on the mobo or on a PCI card).
Do I have that right?

In a separate thread I've been trying to figure out why my fully virtualized
guest can't access a license dongle on a parallel port, and if this is
correct it sounds like the answer is "You can't."

        -Brian M.

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