>   Hello Juerg,
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> I wasn’t sure what all was useful, so I figured I would respond back and post whatever was asked for that might help with sorting this out.  
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> Here is the rundown on a few details on the setup.   First off the hardware is an HP DL580G5 server with 4x E7450 Xeon CPU’s in the server and 32G RAM, to a SAS array.   The CentOS OS should be current as of this message, as I have applied all the latest updates using yum.   I show the kernel to be Linux version 2.6.32-431.3.1.el6.x86_64 and the qemm-kv version is showing as QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2).  
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> The FreeBSD release I am trying to load on a guest VM is the production release of FreeBSD 10, the ISO grabbed from the master site is FreeBSD-10.0-RELEASE-amd64-disc1.iso, and the virt-install command I am using is:
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> virt-install --connect qemu:///system -n FBSD-10_vm1 -r 2048 --vcpus=1 --disk path=/dev/vg_virtual/FBSD-10_vm1 -c /images/FreeBSD-10.0-RELEASE-amd64-disc1.iso --graphics vnc,port=5920,listen=0.0.0.0 --noautoconsole --os-variant freebsd8 --accelerate --network=bridge:br0 --network=bridge:br1
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> I am specifying the freebsd8 flag, as I see no sign of a newer os-variant I can use, so that was the closest to what I was trying to run.   As stated before, if I try and boot FBSD 8 or 9, it works just fine, it’s just when I try and launch 10 that I have this issue.
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> If there is any other info that would be helpful, just let me know..


Sorry I wasn't able to get this going on CentOS 6.5. I disabled XSAVE but that didn't make a difference. It looks like CentOS KVM is simply too old/broken for FreeBSD 10. Maybe you can try with a newer KVM BIOS so see if that makes a difference.