[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] RE: VT-d support proprietary NVidia/ATI GPU passthrough



Konrad Rzeszutek Wilk wrote:
On Mon, Feb 22, 2010 at 12:32:48PM +0000, Timothy J. Moore wrote:
How can xen implement these vendor specific resets?  How could we find out the 
gfx vendor specific stuff?

Can we take anything from the opensource NV, nouveau, or Gallium3D drivers?

As I understand it, the reason for the FLR is to re-initialize the video
cards to re-run through the basic ROM code. Pretty much exactly the same
thing that is done during machine startup. But for gfx pass-through you
need to this with the Bochs code running so it can call the gfx BIOS.

I don't think that the open-source drivers go so low to re-initialize
the card?

Thought perhaps another way to do this, is to put the cards in D3 (cold)
state and then re-initialize them back up? (this is btw, what the
pciback drivers does when it seizes the card).
reset through Dstate transition is not guarantee to work for all devices. As we observed, it seems didn't work for Intel IGD, so we implemented vendor specific reset for Intel IGD.

Regards,
Weidong

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


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.