[Bug 1848244] [NEW] QEMU KVM IGD SandyBridge Passthrough crash

[Anastasios Vacharakis]

Public bug reported:

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

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1848244

Title:
  QEMU KVM IGD SandyBridge Passthrough crash

Status in QEMU:
  New

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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