[vfio-users] Support for Passthrough

Sat Nov 19 18:22:49 UTC 2016

Well. If it works for you, it doesn't matter what method you have used.
For me, ROM's from that site didn't have UEFI at all, at least it wasn't
working with my VM, so i've went onto my card's vendor (MSI) forum and
looked up threads where they ask for UEFI ROMs, striped it and it works
like a charm now.

On 11/19/2016 07:15 PM, Thomas Mashos wrote:
> 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 <mailto: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 <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/d3f96618/attachment.htm>