[vfio-users] Support for Passthrough

Sat Nov 19 18:15:20 UTC 2016

I did read your previous email and I tried that, it didn't work for me.
However, it's possible that I didn't have the right rom file the first
time. The one I had tried loading via the XML file I had gotten by
googleing as you had suggested. The one I flashed I got after doing a card
lookup on this site https://www.techpowerup.com/vgabios/

On Sat, Nov 19, 2016 at 10:10 AM Dawid Osuchowski <tulphoon at openmailbox.org>
wrote:

> 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>
> 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
>
>
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