[vfio-users] vga passthrough Zotac GTX 1060 3G

Mon Mar 13 21:32:02 UTC 2017

Hi,

first of all, the GPU proved to be faulty so I had to return it (PC even
stopped POSTing when it was in). getting RX 480 tomorrow to have less
hassle. Comments inline

Alex Williamson wrote:
> On Fri, 10 Mar 2017 22:33:15 +0100
> Jiri Novak <jiri.novak at ghorland.net> wrote:
>
>> Hi,
>>
>> previuosly I've successfully passed radeon cards on the same box. now
>> I'm trying to pass Zotac GTX 1060 3G (both to new or the old VMs) and
>> can't get past:
>> Running option rom at c000:0003 - if I don't specify romfile
>> Booting from 0000:7c00 - if I specify romfile, the VM doesn't boot though.
>> no output at all on serial console if I try to boot with -bios
>> /usr/share/qemu/OVMF.fd
>>
>> logs with and without romfile in attachements, those would be long
>>
>> any ideas what to try next?
> Is the host platform Intel with IGD graphics enabled?  If so then VGA
> accesses are probably accessing IGD instead of the assigned GPU, which
> can cause such problems.  You're better off getting OVMF to work
> properly (-bios is not the right way to invoke OVMF).
No, there's no IGD. Maybe I've googled wrong how to turn on OVMF :)
>> the qemu commandline (if you have any other hints regarding better
>> options, I'd appreciate it. especially if I can better map what cpus are
>> used for which vcpu):
> Even better, use libvirt so you can pin individual vCPUs.
I've stopped using libvirt in the beginning and don't plan to install it
back, so I'll have to script that around myself.
>
>> LC_ALL=C
>> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
>> QEMU_AUDIO_DRV=pa /usr/bin/taskset -c 4-7,20-23
>> /usr/bin/qemu-system-x86_64 \
>>     -name 12-wingame \
>>     -machine pc-q35-2.4,accel=kvm,usb=off \
>>     -cpu
>> SandyBridge,+invtsc,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off
>> \
>>     -object
>> memory-backend-file,id=mem0,size=16G,mem-path=/dev/hugepages,share=off \
>>     -numa node,nodeid=0,memdev=mem0 \
>>     -m 16G \
>>     -realtime mlock=off \
>>     -smp sockets=1,cores=4,threads=2 \
>>     -uuid aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaa \
>>     -nographic -no-user-config -nodefaults -no-hpet \
>>     -rtc base=localtime,driftfix=slew \
>>     -global kvm-pit.lost_tick_policy=discard \
>>     -boot d \
>>     -device
>> ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \
>>     -device pci-bridge,chassis_nr=2,id=pci.2,bus=pcie.0,addr=0x3 \
>>     -device pci-bridge,chassis_nr=3,id=pci.3,bus=pcie.0,addr=0x4 \
>>     -device pci-bridge,chassis_nr=4,id=pci.4,bus=pcie.0,addr=0x5 \
>>     -device pci-bridge,chassis_nr=5,id=pci.5,bus=pcie.0,addr=0x6 \
> What's going on here?  Why attach so many pci-bridges?  These aren't
> PCIe root ports.
Originally libvirt magic which I've modified and now keep more or less
same for all VMs to be able to easily migrate them back and forth, run
on real HW or not (with virtualised vga), though it can be simplified.
>
>>     -device piix3-usb-uhci,id=usb,bus=pcie.0,addr=0x7 \
>>     -drive
>> file=/dev/Z-ssd/qemu/12-wingame,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native
>> \
>>     -drive
>> file=/dev/Z-ssd/data/games-blizzard,if=none,id=drive-virtio-disk1,format=raw,cache=none,aio=native
>> \
>>     -device virtio-scsi-pci,bus=pci.2,addr=0x1 \
>>     -device scsi-hd,drive=drive-virtio-disk0 \
>>     -device scsi-hd,drive=drive-virtio-disk1 \
>>     -netdev tap,id=netdev0,ifname=V0300t12,script=no,downscript=no \
>>     -device
>> virtio-net-pci,netdev=netdev0,id=net0,mac=42:42:42:00:00:0c,bus=pci.2,addr=0x2
>> \
>>     -device vfio-pci,host=07:00.0,id=hostdev2,bus=pci.4,addr=0x1 \
>>     -device vfio-pci,host=00:1a.0,id=hostdev3,bus=pci.2,addr=0x4 \
>>     -device vfio-pci,host=00:1d.0,id=hostdev5,bus=pci.2,addr=0x6 \
>>     -device
>> vfio-pci,host=02:00.0,id=hostdev6,bus=pci.5,multifunction=on,addr=0x1,x-vga=on
>> \
>>     -device vfio-pci,host=02:00.1,id=hostdev7,bus=pci.5,addr=0x1.0x1 \
>>     -device virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x7 \
> Strange layout.  What benefit are you trying to achieve here?
Copying host layout on laptop originally
>
>>     -vga none \
>>     -soundhw hda \
>>     -chardev stdio,id=seabios \
>>     -device isa-debugcon,iobase=0x402,chardev=seabios \
>>     -msg timestamp=on \
>>         -drive
>> file=/mnt/X-gzfs/backups/pools/C-nas/data/sysiso/win10n_1607.iso,index=0,media=cdrom
>> \
>>         -drive
>> file=/mnt/X-gzfs/backups/pools/C-nas/data/sysiso/virtio-win-0.1.118.iso,index=1,media=cdrom
>> \
>>     >>/var/log/kvm/12-wingame.stdout 2>>/var/log/kvm/12-wingame.stderr &  
>>
>> Thanks in advance
>> Gh.

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