[vfio-users] IGD Passthrough - does not work with intel kabylake

Thu Feb 2 13:57:48 UTC 2017

I think I made myself misunderstood,

1 - Host is Linux kernel 4.9.7 .

Linux ubuntu 4.4 is the guest.

The patch in 4.11 is relevant to guest machine or host machine ?

2 - yes.

Regards,
Nicolas

2017-02-02 14:41 GMT+01:00 Manuel Ullmann <ullman.alias at posteo.de>:

> Hi,
>
> in theory kernel 4.4 does not support vfio-igd yet, but since it works
> for Broadwell/Skylake, Ubuntu seems to have backported the patches.
>
> There was a fix released for Kabylake, that will be introduced in kernel
> v4.11. Interesting by the way, that it works to some extent. I’ve seen
> that screen division by three also on a bare-metal Win10 machine, but I
> don’t know, what hardware that had. Fixed it by rebooting into a Linux
> Mint iso and subsequently rebooting back into Windows. So two questions:
>
> 1. Does the fix for Kabylake help, that will be
>    introduced in kernel 4.11?
>     https://lkml.org/lkml/2017/1/19/458
> 2. Is this reproducible on a cold reboot?
>
> You will most likely require the Kabylake fix, but I also would be
> interested, whether some tries might have just messed up your GPU
> resverved RAM introducing the screen division. I’d assume, that even
> when the screen operates normally on cold reboot, the card usage
> might be limited due to the missing patch.
>
> Best regards,
> Manuel
> > Hello,
> > We are using vfio igd passthrough :
> > Win10 | Linux ubuntu : broadwell IGD / skylake IGD ( intel nuc
> > plateforme )
> > without problem, igd is working well .
> >
> > Now with the new intel nuc ( kabylake / nuc7i) ,
> > Neither windows nor linux recognize intel graphic card.
> > Under windows, drivers is on error, and screen is divide into 3
> > screens ,
> > as under Linux.
> >
> > On linux :
> >
> > neo at ubuntu:~$ lspci -nn
> > 00:00.0 Host bridge [0600]: Intel Corporation 440FX - 82441FX PMC
> > [Natoma] [8086:1237] (rev 02)
> > 00:01.0 ISA bridge [0601]: Intel Corporation 82371SB PIIX3 ISA
> > [Natoma/Triton II] [8086:7000]
> > 00:01.1 IDE interface [0101]: Intel Corporation 82371SB PIIX3 IDE
> > [Natoma/Triton II] [8086:7010]
> > 00:01.2 USB controller [0c03]: Intel Corporation 82371SB PIIX3 USB
> > [Natoma/Triton II] [8086:7020] (rev 01)
> > 00:01.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI
> > [8086:7113] (rev 03)
> > 00:02.0 VGA compatible controller [0300]: Intel Corporation Device
> > [8086:5916] (rev 02)
> > 00:03.0 Ethernet controller [0200]: Intel Corporation 82540EM Gigabit
> > Ethernet Controller [8086:100e] (rev 03)
> > 00:04.0 Communication controller [0780]: Red Hat, Inc Virtio console
> > [1af4:1003]
> > 00:05.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB
> > 3.0 xHCI Controller [8086:9d2f] (rev 21)
> > 00:06.0 Multimedia audio controller [0401]: Intel Corporation Device
> > [8086:9d71] (rev 21)
> > 00:07.0 Ethernet controller [0200]: Intel Corporation 82540EM Gigabit
> > Ethernet Controller [8086:100e] (rev 03)
> > 00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:9d4e] (rev
> > 21)
> > neo at ubuntu:~$
> >
> > neo at ubuntu:~$ uname -a
> > Linux ubuntu 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC
> > 2016 x86_64 x86_64 x86_64 GNU/Linux
> >
> > Vm is starting as :
> > ( it is important to notice that we are exactly in same condition,
> > except broadwell/skylake/kabylake )
> >
> > /usr/bin/qemu-system-x86_64.igd -name guest=ubuntu,debug-threads=on -S
> > -object
> > secret,id=masterKey0,format=raw,file=/var/lib/libvirt/
> qemu/domain-2-ubuntu/master-key.aes
> > -machine pc-i440fx-2.7,accel=kvm,usb=off -cpu
> > Broadwell-noTSX,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -bios
> > /usr/share/seabios/bios.bin -m 2721 -mem-prealloc -mem-path
> > /dev/hugepages/libvirt/qemu -realtime mlock=off -smp
> > 2,sockets=1,cores=2,threads=1 -uuid
> > 2c5aec33-ae0c-3870-babf-d9e26b640248 -nographic -no-user-config -
> > nodefaults -chardev
> > socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-2-
> ubuntu/monitor.sock,server,nowait
> > -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -
> > no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global
> > PIIX4_PM.disable_s4=1 -boot strict=on -device
> > piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device
> > virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive
> > file=nbd:unix:/tmp/ubuntu.ctl,format=raw,if=none,id=drive-ide0-0-0 -
> > device
> > ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -
> > drive file=nbd:unix:/tmp/swap.ctl,format=raw,if=none,id=drive-ide0-0-1
> > -device ide-hd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -
> > netdev tap,fd=22,id=hostnet0 -device
> > e1000,netdev=hostnet0,id=net0,mac=ac:de:50:68:49:75,bus=pci.0,addr=0x3
> > -chardev
> > socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/
> target/domain-2-ubuntu/org.qemu.guest_agent.0,server,nowait
> > -device
> > virtserialport,bus=virtio-serial0.0,nr=1,chardev=
> charchannel0,id=channel0,name=org.qemu.guest_agent.0
> > -device vfio-pci,host=00:02.0,id=hostdev0,bus=pci.0,addr=0x2 -device
> > vfio-pci,host=00:14.0,id=hostdev1,bus=pci.0,addr=0x5 -device
> > vfio-pci,host=00:1f.3,id=hostdev2,bus=pci.0,addr=0x6 -netdev
> > user,id=user.0,restrict=on,hostfwd=tcp:127.0.0.1:5901-:5900 -device
> > e1000,netdev=user.0 -msg timestamp=on
> >
> > Any suggestions,
> > Regards,
> > Nicolas Prochazka
> >
> >
> > _______________________________________________
> > vfio-users mailing list
> > vfio-users at redhat.com
> > https://www.redhat.com/mailman/listinfo/vfio-users
>
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