[Bug 1848244] Re: QEMU KVM IGD SandyBridge Passthrough crash

[Thomas Huth]

I'm closing this now since there seems to be a workaround available and
nobody updated this bug in the past 1.5 years anymore

** Changed in: qemu
       Status: New => Won't Fix

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Title:
  QEMU KVM IGD SandyBridge Passthrough crash

Status in QEMU:
  Won't Fix

Bug description:
  I try to passthrough my Intel GPU with this command:

  qemu-system-x86_64 -nodefaults -parallel none -k de -rtc
  base=localtime -serial unix:/run/qemu/win7-serial.sock,server,nowait
  -monitor unix:/run/qemu/win7-monitor.sock,server,nowait -netdev
  user,id=net0 -device virtio-net-pci,netdev=net0,mac=52:54:00:00:00:07
  -device vfio-pci,host=0000:00:02.0,addr=0x2 -device vfio-
  pci,host=0000:00:1b.0 -device virtio-keyboard-pci -device virtio-
  mouse-pci -object input-linux,id=kbd1,evdev=/dev/input/by-
  path/pci-0000:00:1a.0-usb-0:1.2.2:1.2-event-kbd,grab_all=on,repeat=on
  -object input-linux,id=mouse1,evdev=/dev/input/by-
  path/pci-0000:00:1a.0-usb-0:1.2.2:1.2-event-mouse -enable-kvm -cpu
  host -smp 4,sockets=1,cores=4,threads=1 -vga none -display none -m 2g
  -device virtio-blk-pci,drive=boot,bootindex=1 -drive
  file=/opt/vm/qcow2/win7.qcow2,format=qcow2,if=none,id=boot

  This ONLY works if i remove "-enable-kvm" else the windows (7 and 10)
  boot crashes in bluescreen "stop 0x0000003b" (probably while loading
  the intel gpu driver (intel graphics 3000).

  The system is an older ThinkPad T420 with Intel(R) Core(TM) i5-2520M
  CPU @ 2.50GHz.

  CMDLINE: BOOT_IMAGE=/vmlinuz-linux root=LABEL=root rw ipv6.disable=0
  net.ifnames=0 intel_iommu=on iommu=pt video=LVDS-1:d

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