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Description of problem:
windows 2008 R2 guest BSOD with '-no-kvm'

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-1.5.3-18.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. boot windows 2008 R2 guest with '-no-kvm'
# /usr/libexec/qemu-kvm -nodefaults -M pc -m 4G -cpu Opteron_G3 -smp 4,cores=2,threads=2,sockets=1 -boot menu=on -monitor stdio -rtc base=localtime,clock=host,driftfix=slew -qmp tcp:0:5555,server,nowait -vga qxl -drive file=/home/win2008r2.qcow2_v3,format=qcow2,id=guest-img,if=none,werror=stop,rerror=stop -device ide-hd,drive=guest-img,id=os-disk -spice disable-ticketing,port=5931 -no-kvm

Actual results:
BSOD

Expected results:
guest can boot success

Additional info:

Created attachment 822785 [details]
screen shot

http://www.geoffchappell.com/studies/windows/km/bugchecks/5d.htm

Upstream reports:
https://bugs.launchpad.net/qemu/+bug/921208
http://lists.nongnu.org/archive/html/qemu-devel/2013-11/msg01063.html

Paolo,
What is your call?

Not a bug.

Paolo, How comes?
It should be fixable.
Are you saying that it is not needed? Could be, but it doesn't look good.
Can it happen to an innocent Libvirt user?

More precisely, not a bug as far as we are concerned.  We do not support TCG except for the very specific case of running libguestfs, I think?

It is fixable, but I have no idea whether it is easy or hard because I have no experience.

It can happen if you use 'qemu' instead of 'kvm' as the virtualization technology.  Perhaps we should add a "taint" flag to libvirt for domains that are not running under KVM and have qemu-kvm in the emulator name.