Virtual Raspbian on QEMU in Ubuntu

How to run virtual Raspbian on QEMU in Ubuntu:

1. Compile QEMU for ARM (1176).

$ sudo apt-get install git zlib1g-dev libsdl1.2-dev libpixman-1-dev
$ cd tmp
$ git clone git://git.qemu-project.org/qemu.git && cd qemu
$ ./configure --target-list="arm-softmmu arm-linux-user" --enable-sdl --prefix=/usr/local
$ make
$ sudo make install

2. Prepare QEMU environment and raspbian image.

$ mkdir ~/qemu-vms/ && cd ~/qemu-vms/

Download Raspbian Wheezy from http://www.raspberrypi.org/downloads and Linux kernel for QEMU from http://xecdesign.com/downloads/linux-qemu/kernel-qemu.

$ file ~/qemu-vms/2014-01-07-wheezy-raspbian.img
~/qemu-vms/2014-01-07-wheezy-raspbian.img: x86 boot sector; partition 1: ID=0xc, starthead 130, startsector 8192, 114688 sectors; partition 2: ID=0x83, starthead 165, startsector 122880, 5662720 sectors, code offset 0xb8

Take the partition 2 'startsector' value an multiply by 512, and use this figure as the offset value in the mount command below:

$ sudo mount ~/qemu-vms/2014-01-07-wheezy-raspbian.img -o offset=$((122880*512)) /mnt

Comment out the line in the /mnt/etc/ld.so.preload file and unmount:

$ sudo emacs -nw /mnt/etc/ld.so.preload
$ sudo umount /mnt

3. Run simulation.

$ qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1" -hda ~/qemu-vms/2014-01-07-wheezy-raspbian.img -redir tcp:5022::22

QEMU gives you a root shell, run:

$ fsck /dev/sda2
$ shutdown -r now

UPDATE: how to open ssh connection (see -redir option):

$ ssh -p 5022 pi@localhost

UPDATE: how expand free space:

1. Create /etc/udev/rules.d/90-qemu.rules with the following content and shutdown the system:

KERNEL=="sda", SYMLINK+="mmcblk0"
KERNEL=="sda?", SYMLINK+="mmcblk0p%n"
KERNEL=="sda2", SYMLINK+="root"

2. Resize the image:

$ qemu-img resize /qemu-vms/2014-01-07-wheezy-raspbian.img +4G

3. Boot up your emulator again and do:

$ sudo ln -snf mmcblk0p2 /dev/root
$ sudo raspi-config

Choose the first option to resize your disk, and it will tell you to reboot.

UPDATE: update keyboard mappings if necessary:

$ sudo dpkg-reconfigure keyboard-configuration