[vfio-users] No reset on GT730

Tue Jul 5 19:20:16 UTC 2016

Hmm... It's hard to tell from here if this is due to a misconfiguration 
or from an actual qemu issue. Would you mind checking sections 1, 2 and 
3 of this tutorial 
<https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF> to make 
sure that your system is properly configured? Section 4 is geared more 
towards libvirt, while you appear to be using qemu so you can skip that 
one. I get that you have no issues with your VM as of now aside from 
that reboot problem, but for all we know, it might just be some driver 
override issue.

- Nicolas

On 2016-07-05 02:05, Gerhard de Clercq wrote:
>
> Ok thanks for the info. There is nothing else suspicious in dmesg and 
> Qemu returned no error messages. I do believe the error stream is 
> working though because I did get error when I forgot to attach my new 
> card vfio-pci.
>
> ------------------------------------------------------------------------
> *From:* Nicolas Roy-Renaud <nicolas.roy-renaud.1 at ens.etsmtl.ca>
> *Sent:* 04 July 2016 11:49:36 PM
> *To:* Gerhard de Clercq
> *Cc:* vfio-users
> *Subject:* Re: [vfio-users] No reset on GT730
>
> You can't really reset a card using SeaBIOS because it uses VGA 
> arbitration, which has little to do with how an actual PCI passthrough 
> would work IIRC. What makes you so sure that the issue comes from the 
> gpu not resetting, is dmesg returning anything suspicious or is your 
> qemu command completing successfully after you shutdown your VM? If 
> you're not using libvirt, qemu is supposed to log error messages in 
> the standard error stream instead, does anything abnormal come up when 
> the VM shuts down?
>
>
> - Nicolas
>
>
> On 2016-07-04 15:46, Gerhard de Clercq wrote:
>>
>> I was actually running though command line so no libvirt log and I 
>> didn't see anything in journalctl though I'm not entirely sure what 
>> to look for. I do indeed pass some other devices. I also saw in dmesg 
>> dat vfio-pci was warning about the ROM being invalid when I tried to 
>> start a VM the second or later time but passing a vgabios explicitly 
>> didn't make any difference. Here is my command:
>>
>>
>> sudo qemu-system-x86_64 -enable-kvm -M q35 -m 4G -cpu 
>> core2duo,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off,hv_vendor_id=badapple 
>> -smp 4,sockets=1,cores=2,threads=2  -bios OVMF.fd -device 
>> ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 -device 
>> i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e -device 
>> pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 -device 
>> piix3-usb-uhci,id=usb,bus=pci.2,addr=0x1 -device 
>> ahci,id=sata0,bus=pci.2,addr=0x5 -drive 
>> file=./Untitled.iso,if=none,id=drive-sata0-0-2,format=raw -device 
>> ide-hd,bus=ide.2,drive=drive-sata0-0-2,id=sata0-0-2,bootindex=1 
>> -drive 
>> file=./nomachine.qcow2,if=none,media=disk,id=drive-sata0-0-0,format=qcow2 
>> -device ide-hd,bus=sata0.0,drive=drive-sata0-0-0,id=sata0-0-0 -smbios 
>> type=2 -serial stdio -device 
>> vfio-pci,host=05:00.0,bus=pcie.0,multifunction=on -device 
>> vfio-pci,host=05:00.1,bus=pcie.0 -netdev 
>> tap,id=net0,ifname=tap0,script=no,downscript=no -device 
>> e1000-82545em,netdev=net0,id=net0,mac=52:54:00:c9:18:27 -usb -device 
>> usb-host,hostbus=3,hostaddr=3 -vga none
>>
>> Also, I was wondering, is it definitely impossible to reset a card 
>> when using vfio-vga and seabios?
>> ------------------------------------------------------------------------
>> *From:* Nicolas Roy-Renaud <nicolas.roy-renaud.1 at ens.etsmtl.ca>
>> *Sent:* 04 July 2016 07:18:12 PM
>> *To:* Gerhard de Clercq
>> *Cc:* vfio-users
>> *Subject:* Re: [vfio-users] No reset on GT730
>>
>> Are you passing through any other PCI devices, like USB controllers 
>> or soundcards? I'm guessing you've already checked your vm logs in 
>> /var/log/libvirt/qemu and the daemon logs in journalctl?
>>
>>
>> - Nicolas
>>
>>
>> On 2016-07-03 12:33, Gerhard de Clercq wrote:
>>>
>>> I am trying to set up PCI passthrough of my Nvidia GT730 GPU on a 
>>> fully up to date Fedora 24 system. I have managed to get it working 
>>> but the problem is that it only works once after booting the host 
>>> and to run again I need to reboot the host. I have determined that 
>>> this is most likely caused by the fact that the GPU is not being 
>>> reset. I bought this GPU because it has UEFI support after I could 
>>> not get another one working with BIOS. It appeared as if though only 
>>> AMD GPUs had a reset problem. Is this a known problem with this GPU 
>>> and is there any way that I can try to force a reset?
>>>
>>>
>>>
>>> _______________________________________________
>>> vfio-users mailing list
>>> vfio-users at redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>
>

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