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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