[vfio-users] Code 43 when using Quadro K420 on another system.

[Eddie Yen]

Hi Alex, thanks for the reply!

I realized that primary VGA is usually controlled by BIOS, that mean can
choose discrete GPU or BMC as primary VGA.
Unfortunately this server doesn't include this option. So that I can't
choose BMC as primary VGA, and seems like can't setup vesafb to use BMC
manually.

I'll try video=vesafb:off to see what happen.

BTW, IME K2000 and higher need to be a secondary card in guest, is now
still a same or it already can be primary card so that no QXL or something?

Thanks,



2017-06-13 9:22 GMT+08:00 Alex Williamson <alex.l.williamson at gmail.com>:

> On Mon, Jun 12, 2017 at 7:12 PM, Eddie Yen <missile0407 at gmail.com> wrote:
>
>> Hi there,
>>
>> I'm trying to do passthrough on another machine, since I can do the same
>> thing on the original, I think it would be easy, but I was wrong.
>>
>> Here's the info about this server.
>>
>> CPU: Intel Xeon E5 2620 v2 x 2
>> OS: Ubuntu 16.04 Server (Kernel ver: 4.4.0)
>> QEMU verison: 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.14)
>> Libvirt version: 1.3.1
>>
>> Only the different things is this server included BMC VGA, and I install
>> Xfce virtual GUI + VNC.
>>
>> Below is what I'm setting on Ubuntu:
>>
>> 1. Blacklist the nouveau or other drivers about Nvidia
>> Included nouveau, vga16fb, rivafb, nvidiafb, rivatv.
>>
>> 2. Add VFIO drivers into init list when boot .
>> # cat /etc/modules
>> vfio
>> vfio_pci
>> vfio_iommu_type1
>> vfio_virqfd
>>
>> 3. Add K420 PID & VID and open IOMMU function into GRUB
>> GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on vfio-pci.ids=10de:0ff3,10de:0e
>> 1b"
>>
>> 4. Build VM and install Windows Server 2012 R2
>>
>> 5. Shutdown VM, add kvm=off, delete everything about Hyper-V function,
>> and passthrough K420 after installation.
>>
>>
>> But when I mount K420 into VM, VFIO shows error on kernel log.
>> vfio-pci 0000:06:00.0: BAR 3: can't reserve [mem 0xd0000000-0xd1ffffff
>> 64bit pref]
>>
>> And I checked /proc/iomem, it shows
>>
>> 80000000-dfffffff : PCI Bus 0000:00
>>   80000000-8fffffff : PCI MMCONFIG 0000 [bus 00-ff]
>>     80000000-8fffffff : reserved
>>   c0000000-d1ffffff : PCI Bus 0000:06
>>     c0000000-cfffffff : 0000:06:00.0
>>     d0000000-d1ffffff : 0000:06:00.0
>>       d1000000-d112ffff : vesafb
>>
>>
>> VM can boot, but show Code 43 after installed driver.
>>
>> I don't know why it occupied by vesafb, since this server already have
>> BMC chip.
>>
>>
>> Here's the VM profile:
>>
>> https://pastebin.com/PXuT4Vqg
>>
>>
>> Any ideas?
>>
>
> vesafb is claiming resources on the card, clearly you need to prevent that
> or release it from that driver.  This is why primary graphics assignment is
> not recommended.  You'll want to do something like video=vesafb:off to
> block it and then see what tries to claim it next and block that.  Also
> note that while Quadro K2000 and better better cards are actually supported
> by NVIDIA (on certain distros at least), Quadros below that are not and may
> or may not work as well as equivalent GeForce cards.  Good luck,
>
> Alex
>
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