Xen users - Jan 2008 - Isolated Device Domain and I/O Spaces in Xen 3

Hi,

First excuse me for sending this question twice (I''ve already asked it
in the "A few newbie questions about Xen devices" thread, but it has
been hijacked and I suppose I have better chances to get replies by
writing smaller mail with an appealing subject).

I''ve read thoroughly the document entitled "Safe Hardware Access
with
the Xen Virtual Machine Monitor" [1].

- Regarding IDD:
According to slide 49 in [4], Isolated Driver Domain (IDD) have only
been implemented experimentaly but is not used at all in the current
official releases of Xen 3.  Are there any plans about this?

- Regarding I/O Spaces:
Currently, Virtual Block Devices (VBD) and Virtual (Network) Interfaces
(VIF) are the most common way to provide storage and network devices
within Xen PV guests.  It is yet possible to assign exclusively a PCI
device to any one DomU, in which case the DomU''s driver talks to the
hardware through the "Safe Hardware Interface" (see figure 1 in [2]),
enforced by I/O Spaces, as described in [2] section 4.  Am I right?

Thank you.
Best regards,

[1] http://www.cl.cam.ac.uk/netos/papers/2004-oasis-ngio.pdf
[2] http://www.cl.cam.ac.uk/netos/papers/2005-xen-ols.ppt
-- 
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >

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