[vfio-users] nVidia Code 43

[Alan Jenkins]

I have a theory I am playing with now that it could be something to do with
the PCI id's of the parts of the card. On the host machine they are as
follows:

06:00.0 VGA compatible controller: NVIDIA Corporation GK104 [GeForce GTX
690] (rev a1)
06:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev
a1)
07:00.0 3D controller: NVIDIA Corporation GK104 [GeForce GTX 690] (rev a1)
07:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev
a1)

I am going to try and replicate these Id's as close as possible within a
Linux VM and then install Windows in that VM once I succeed. With a bit of
luck it will then stop Code 43'ing. I will get back to you and let you know
either way.

On Fri, 11 Dec 2015 at 10:28 Alan Jenkins <alan.james.jenkins at gmail.com>
wrote:

> Hmm I am starting to think that this is not nVidia's monkeying with the
> driver.  I just tried installing driver 337.50 which I believe is from
> before they "accidentally" added the bugs that cause us problems and I am
> still getting Code 43.
>
> With regards to the ignore_msrs option for KVM it has been enabled during
> all of my recent testing as I read that that helps.
>
> To summarise what I have tried so far:
>
> * Double checked that PCI-E power connectors are plugged into the card
> properly (they were and the card was working fine in windows but checked
> anyway to rule it out).
>
> * Tried both q35 and i440FX chipsets.
>
> * Installed nVidia's 337.50 beta driver which I believe was from before
> the restrictions.
>
> Is there any possibility that there is some quirk with passing through a
> gtx690 as it is a dual GPU card? Has anyone else had success with one?
>
> Thanks,
>
> Alan Jenkins
>
> On Fri, 11 Dec 2015 10:04 Hristo Iliev <hristo at hiliev.eu> wrote:
>
>> On Fri, 11 Dec 2015 08:08:41 +0000
>> Alan Jenkins <alan.james.jenkins at gmail.com> wrote:
>>
>> > Hey guys,
>> >
>> > I have spent the last 2 days experimenting trying to get my GTX690
>> passed
>> > through to a Windows 10 guest and since succeeding have been getting
>> > nothing but Code 43 errors.
>> >
>> > In Windows 10 I am currently using the latest nVidia driver (359.06).
>> >
>> > My libvirt xml is here http://pastebin.com/KY9QWhcu note that there is
>> a
>> > device commented out from passthrough, that is a PCI express SSD which I
>> > will be trying to make work but for the time being I am focusing on
>> > getting getting the GTX 690 to function (remember it is a dual GPU card
>> > which is why there is so much forwarded).
>> >
>> > I am running Arch Linux with the linux-vfio-lts kernel from AUR as I
>> > discovered the hard way that there is currently a bug in the normal
>> > kernels that causes passthrough to hang the VM while it is loading
>> > Windows and cause the host machine to stutter. The exact kernel version
>> > is: 4.1.13-1-vfio-lts #1 SMP PREEMPT Thu Dec 10 13:21:54 GMT 2015 x86_64
>> > GNU/Linux.
>> >
>> > My libvirt version is: 1.3.0-1.
>> > My Tianocore uefi is from this RPM:
>> > edk2.git-ovmf-x64-0-20151209.b1361.gfaec499.noarch.rpm
>> >
>> > Have nVidia stepped up their efforts to block us from using vga
>> > passthrough or is there something I have missed in my XML that could be
>> > indicating to the driver that it is running in a VM which then causes it
>> > to Code 43 me?
>> >
>>
>> Hi Alan,
>>
>> Besides switching to a 440FX machine type, try also commenting out the
>> following:
>>
>>   <hyperv>
>>     <relaxed state='off'/>
>>     <vapic state='off'/>
>>     <spinlocks state='off'/>
>>   </hyperv>
>>
>> My Windows 10 VM (working XML config attached) works fine without it and I
>> regularly update the driver via NVIDIA Experience. For the latter to work,
>> add to /etc/modprobe.d/kvm.conf the following (create the file if it
>> doesn't exist):
>>
>> options kvm ignore_msrs=1
>>
>> While not strictly needed for the NVIDIA driver to work, it makes some
>> programs that probe for various CPU features, including NVIDIA
>> Experience, happy.
>>
>> Regards,
>>
>> Hristo
>>
>> > Thanks for any help in advance,
>> >
>> > Alan Jenkins
>>
>>
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