[vfio-users] No reset on GT730

Thu Jul 7 14:05:48 UTC 2016

I actually used that tutorial to set it up and I can't find anything that I might have missed. I have unfortunately returned the card by now while I still had time so I can't test it further. It would be really nice if we could somehow force vfio to do a reset so that we would know if it is even possible for a card. Is there any cheap (perferably AMD) card that I can get which is known to downright work properly with vfio reset?

________________________________
From: Nicolas Roy-Renaud <nicolas.roy-renaud.1 at ens.etsmtl.ca>
Sent: 05 July 2016 07:20 PM
To: Gerhard de Clercq
Cc: vfio-users
Subject: Re: [vfio-users] No reset on GT730

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><mailto: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><mailto: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<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/20160707/5d266607/attachment.htm>