I think XQEMU has integrated disassembler inside, but not sure. http://xqemu.com/ http://down.emucr.com/v3/5488438111371264
IDA should be able to connect to the kernel debugger interface. Obviously needs the MS XDK. Never did it myself. You should just search for general KD interface information. xqemu only has the GDB stub. So you could possibly connect to that. However, it's not that accurate yet. Just look for normal qemu information.