How to emulate raspberry pi 2 on Ubuntu 14.04 PC?

Here's the question in detail:

http://raspberrypi.stackexchange.com/questions/50519/how-to-emulate-raspberry-pi-2-on-ubuntu-14-04-pc

Yes I have a Pi 2 physically. But I need to boot it virtually on my PC. I have copied the drive(sd card) of it using `dd`, save it as pi2-16gb.img

Now I want to boot it on my PC. I am using qemu to do this.

Do you have some ideas? Or Virtual box to replace qemu?

Appreciate your comments!