[vfio-users] Unable to isolate HDMI device

[Karsten Elfenbein]

Hi,

if you don't have an other driver claiming that card/device then you
only need the softdep for the sound driver.

But it can't hurt to put the softdep in as the vfio driver only claims
the device with the defined IDs. (In case you reinstall driver/modules
or add an other Nvidia card)


Karsten

2017-08-03 9:52 GMT+02:00 LOMBARD Maxime <berillions at gmail.com>:
> Thanks for your explanations.
> It's possible to add softdep only for the HDMI ?
> I disable nouveau in my .config so there is no module for the card in the host.
>
> Envoyé de mon iPhone
>
>> Le 3 août 2017 à 09:28, Karsten Elfenbein <karsten.elfenbein at gmail.com> a écrit :
>>
>> Hi,
>>
>> module load order is not set in stone. So softdep might or might not
>> be needed. (should be added anyway)
>> vfio-pci should only grab those devices with the defined IDs.
>>
>> I got a gf950 and gf970 in my system. Only one card is set to use
>> vfio-pci. The other is used by host.
>>
>>
>> Best regards
>> Karsten
>>
>> 2017-08-03 9:16 GMT+02:00 LOMBARD Maxime <berillions at gmail.com>:
>>> softdep snd-hda-intel pre: vfio-pci
>>>
>>> It's only used by the Ids that i added in the same vfio.conf ?
>>> Because i have other device which use snd_hda_intel module.
>>>
>>> I tried it this afternoon but it's strange that i need it on Gentoo and not
>>> on Debian.
>>>
>>> Envoyé de mon iPhone
>>>
>>> Le 3 août 2017 à 08:59, Karsten Elfenbein <karsten.elfenbein at gmail.com> a
>>> écrit :
>>>
>>> Hi Maxime,
>>>
>>> the modules need to load in the correct order. In this case the
>>> vfio-pci needs to load before the snd-hda-intel and nvidia.
>>>
>>> I have the following lines on my Gentoo machine to achieve that:
>>>
>>> cat /etc/modprobe.d/vfio.conf
>>> softdep nvidia pre: vfio-pci
>>> softdep snd-hda-intel pre: vfio-pci
>>> ...
>>>
>>> Best regards
>>> Karsten
>>>
>>>
>>> 2017-08-03 8:47 GMT+02:00 LOMBARD Maxime <berillions at gmail.com>:
>>>
>>> Hi,
>>>
>>>
>>> I have a big problem on my Gentoo. A problem which does not exist on my
>>>
>>> Debian in the same Desktop.
>>>
>>>
>>> 1- i added in "/etc/modprobe.d/vfio.conf" the ids for my gtx970, gpu and
>>>
>>> HDMI
>>>
>>>
>>> 2- i added the vfio module in "/etc/conf.d/modules" to load them during the
>>>
>>> boot.
>>>
>>>
>>> After the reboot, there is only the VGA device which is attached to vfio,
>>>
>>> the HDMI is still used by intel_hda module.
>>>
>>>
>>> You can see my message in the gentoo forum :
>>>
>>> https://forums.gentoo.org/viewtopic-t-1067110.html
>>>
>>>
>>> Thanks for your help.
>>>
>>> Maxime
>>>
>>>
>>>
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>>>
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>>>
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>>>
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>>>
>>>