[vfio-users] Support for Passthrough

Sat Nov 19 18:10:31 UTC 2016

You didn't have to flash the rom onto the card, you could just supply it
to the VM with the following XML, check my previous mail:

<rom bar='on' file='/opt/GTX760.rom'/>

One thing i've forgotten to add, that the vendors tell people to flash
their cards with this command:

nvflash

But you do not need to do that at all!

I've ran EfiRom -d on the rom file and it said that the file is not a
rom file. The thing that worked for me was striping the rom and skipping
some of the first bytes with this command:

dd if=NV287MH.2K0 of=strip.rom bs=1 skip=1536

Then supplied it into VM and it started working properly :)

On 11/19/2016 07:02 PM, Thomas Mashos wrote:
> I just wanted to reply here because I've been fighting the exact same
> issue for a similiar period of time and have tried many different
> things (see my thread titled 'Another Nvidia code 43 error) and this
> thread ended up helping me resolve the issue.
>
> I didn't have UEFI on my card (says GPU-Z) and couldn't get the rom to
> load via the XML file, so I ended up flashing the UEFI rom to my GTX
> 760 and after rebooting the host and starting the VM, it now works. 
> Here's my current XML file, although I plan to try and back out some
> of the changes I've made  http://termbin.com/99g8
>
> On Sat, Nov 19, 2016 at 3:20 AM Dawid Osuchowski
> <tulphoon at openmailbox.org <mailto:tulphoon at openmailbox.org>> wrote:
>
>     It seems like you might have the same problem i have had with
>     Error 43. For using passthrough with OVMF, your GPU needs to have
>     a UEFI compatible ROM, either on the card itself or supplied to
>     the VM using:
>
>     <rom bar='on' file='/opt/GTX650.rom'/>
>
>     It should be used like this
>
>     <devices>
>       <hostdev mode='subsystem' type='pci' managed='yes'>
>         <source>
>           <address domain='0x0000' bus='0x06' slot='0x02' function='0x0'/>
>         </source>
>         <boot order='1'/>
>         <rom bar='on' file='/opt/GTX650.rom'/>
>       </hostdev>
>     </devices>
>
>     You need to check whether your ROM supports UEFI or not. Look up
>     this blog post by Alex Williamson on how to do that
>     http://vfio.blogspot.com/2014/08/does-my-graphics-card-rom-support-efi.html,
>     but instead of using his utility (which for me said that the rom
>     is UEFI compatible, while it was not) use:
>
>     EfiRom -d
>
>     It comes with 'edk2' package in Fedora.
>
>     If you cannot extract the ROM file from your card (it was the same
>     for me) then go into google and search for something like "(vendor
>     e.g. MSI) GTX 650 TI BOOST uefi rom". If you cannot find anything
>     with that, then go to a forum of the vendor of your card and ask
>     them to supply it to you.
>
>      On 11/19/2016 06:01 AM, Zachary Boley wrote:
>>     I've been at this for almost 2 weeks and im on the final steps,
>>     Error 43 and no matter what i do its always detected as a vm. I
>>     was referred to come here from the vfio subreddit. here are my
>>     specs/versions
>>
>>     Compiled against library: libvirt 2.2.0
>>     Using library: libvirt 2.2.0
>>     Using API: QEMU 2.2.0
>>     Running hypervisor: QEMU 2.7.0
>>     Windows 10 64bit
>>
>>     2x Xeon 5540s @ 2.5
>>     48GB DDR3 ECC
>>     GTX 650 TI BOOST
>>     Fedora 24 Server 4.8.6
>>
>>     to prove IOMMU is enabled http://pastebin.com/K2i7A79j
>>     VFIO-PCI details http://pastebin.com/JAbDRpkj
>>
>>     passthrough VM xml: https://u.teknik.io/NOX1x.xml
>>     libvirt conf: https://u.teknik.io/a0rWz.txt
>>     qemu.conf: https://u.teknik.io/5Gd3Q.txt
>>
>>     thread with my attempts
>>     https://www.reddit.com/r/VFIO/comments/5deci8/error_43_and_other_problems/
>>
>>     I have even used the OVMF git pure efi image  to see if there was
>>     a difference but it doesnt seem to be helping. I have tried both
>>     attempts on Q35 and 440fx and nothing to be gotten out of it. I'm
>>     very lost on this and i have no clue whats going on. Not sure if
>>     this is the place for such requests but im lost
>>
>>
>>     _______________________________________________
>>     vfio-users mailing list
>>     vfio-users at redhat.com <mailto:vfio-users at redhat.com>
>>     https://www.redhat.com/mailman/listinfo/vfio-users
>
>     _______________________________________________
>     vfio-users mailing list
>     vfio-users at redhat.com <mailto:vfio-users at redhat.com>
>     https://www.redhat.com/mailman/listinfo/vfio-users
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20161119/50f5492b/attachment.htm>