General question for developers to access data between VM and VMM.
As I know, paravirtualization solution is a good way to share data for VM and VMM since it has better performance.
Please use Virtio 9p solution for QEMU/KVM. Note that you need to load 9p related modules for guest kernel.
<filesystem type='mount' accessmode='passthrough'> <source dir='host_dir_path'/> <target dir='testlabel'/> </filesystem>
After start guest OS, run following command
# mount testlabel /mnt/ -t 9p -o trans=virtio