I was unable to boot a freebsd vm under kvm-5 on an amd host.
I tried freebsd 6.2-rc1 and 6.1 amd64 iso images but it leads to a General Protection Fault (images available from http://ftp13.us.freebsd.org/pub/FreeBSD/ISO-IMAGES-amd64
Host system is an IBM LS41 blade with 2 dual core opteron 8216 HE running debian sarge with kernel 2.6.18.3.
kernel was compiled with gcc 3.3.5 (Debian 1:3.3.5-13)
screenshot of the GPF message
Logged In: YES
user_id=1220479
Originator: YES
On the same system, install crahed as well with debian-31r3-amd64-binary-1.iso with a "double fault" while running Swapper process.
Iso image from http://cdimage.debian.org/cdimage/unofficial/sarge-amd64/iso-cd/debian-31r3-amd64-binary-1.iso
Logged In: YES
user_id=539971
Originator: NO
freebsd uses the smsw, which was not emulated. fixed.