[Qemu-discuss] GPU passthrough - 64-bit MMIO (with OVMF)

[Thomas Lamprecht]

Hi all,


I'm wondering if there is a possibility to pass through a big GPU like 
the NVIDIA Tesla K80 (with 24 GB ram).
AFAIK, there is a problem with mapping that lot of memory which would 
need 64 bit MMIO
(or "above 4G mapping" feature, like some firmware are calling it).

So after some searching on the web I came to no clear answer and though 
simply asking here would be the best.
I only found a post from about 2010 on the qemu-devel list [1] which 
stated that there isn't 64-bit MMIO support (yet),
but also that it'd be useful. Was there any progress on this matter? If 
yes how could someone enable it (with OVMF?).

How is the support for passing through such Hardware, or in other word 
has anybody achieved this?
Maybe I should also note that smaller GPUs pass-through just fine.

best regards,
Thomas

[1] https://lists.nongnu.org/archive/html/qemu-devel/2010-02/msg01106.html