qemu 3

https://blog.csdn.net/sxw1002/article/details/53011310?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-53011310-blog-54942848.pc_relevant_landingrelevant&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-53011310-blog-54942848.pc_relevant_landingrelevant&utm_relevant_index=2