declare options=''
options="${options} -name 'windows7'"
options="${options} -m 2G"
options="${options} -accel kvm"
options="${options} -cpu qemu64"
options="${options} -boot order=d"
options="${options} -vga virtio"
options="${options} -rtc base=localtime"
options="${options} -smp 1,sockets=1,cores=1,threads=1,maxcpus=1"
options="${options} -drive file=/home/xxxxx/work/iso/win7.iso,media=cdrom"
options="${options} -drive file=/home/xxxxx/work/virtio/virtio-win-0.1.240.iso,media=cdrom"
options="${options} -drive file=/home/xxxxx/work/os/win7.qcow2,format=qcow2,if=virtio"
options="${options} -device usb-ehci"
options="${options} -device usb-tablet"
options="${options} -device virtio-net-pci"
/bin/taskset -c 0-3 qemu-system-x86_64 ${options}
unset options