Re: Xen VGA graphics passthrough for secondary adapters, vBAR=pBAR etc

[Christian Tramnitz <chris.ace@gmx.net>]

12.04.2010 12:08, Weidong Han wrote:
>> I already added that suggestion to the 4.1 suggested features some
>> days ago and planned to rebase the patches to 4.0 if they need any
>> adjustments.
>> One major change I'd like to see is dynamic (and thus optional)
>> configuration of the mem space to be mapped and the BIOS file to be used
> Could you explain "dynamic configuration of the mem space to be mapped"?
> do you mean MMIO memories?
Yes, the MMIO BARs that currently need manual changes to dsdt.asl before 
compilation. If we could make that a runtime configuration option or 
even allow dynamic detection (via libpci?) this would help a lot. It 
would also make the changes less intrusive (and increase the chances of 
being accepted I hope).

>> Also afair the previous patch set also had a maximum size (correct me
>> if I'm wrong) for the BIOS size that was to small for recent (HD4800+)
>> ATI devices.
> What is the size of HD4800 bios? It can adjust memory map address
> definitions in hvmloader to solve it.
It's 128kB (current limitation is 64k), but that should be easy enough 
to fix, just wanted to mention it while we're discussing the topic ;-)


Are you still actively working on this topic? Haven't seen a reply to my 
previous mails to list if work is still being done. Just want to avoid, 
that we're both working on the same thing...


Best regards,
    Christian