| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
RE: [Xen-users] HVM questions
> -----Original Message-----
> From: John Helder [mailto:gtg032i@xxxxxxxxxxxxxxx]
> Sent: 11 July 2006 14:18
> To: Petersson, Mats; 'Gregory Gee'; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] HVM questions
>
> To Mats, Gregory, and Xen-Users:
>
>
> Does the below limitation also explain the current issues
> with accessing
> pass-through video cards in domU via X as described in Julian
> Davison's post
> "X11 in domU" (4 July 2006)?
Only if you try to do it in HVM domain - which you can't do anyways, as
you can't pass the PCI (AGP/PCIe are PCI in this case) to the DomU in
HVM-mode.
It's probably broken in some other way...
--
Mats
>
>
> Petersson's E-mail:
> >Yes, PCI passthrough is currently only supported for
> Para-virtual guests.
> >It is expected to be solved (there's no technical limitation
> for this, just
>
> >that someone has to write some code to support it, basically
> - and the
> >principle is not difficult - just fill in the PCI-table in
> the guest so
> that
> >the device looks like its there). There are some other
> limitations tho'. If
>
> >the PCI-card uses direct memory access, you'd need to use a
> para-virtual
> >driver (i.e a driver that is aware of the fact that physical
> memory isn't
> >where the guest-OS thinks it is).
>
> >PIO-type card will work fine without special drivers -
> unfortunately,
> >very few PCI-cards are PIO-based...
>
>
>
> Davison's E-mail:
> >Using "X -novtswitch -sharevts vt1" I ended up being told:
> >
> >-------------- copy of end of X output starts --------------
> >(EE) I810(0): Cannot map SYS BIOS
> >
> >Fatal server error:
> >xf86MapVidMem: Could not mmap framebuffer (0x000a0000,0x10000) (Bad
> address)
> >-------------- copy of end of X output ends --------------
>
>
> Thank-you.
>
> John Helder
> gtg032i@xxxxxxxxxxxxxxx
>
>
>
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home