[vfio-users] Support for Passthrough

[Dawid Osuchowski]

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
>
>
> _______________________________________________
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> vfio-users at redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users

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