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-renau...@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-renau...@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?
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