import-layers/yocto-poky/scripts/runqemu.README

Using OE images with QEMU
=========================

OE-Core can generate qemu bootable kernels and images with can be used 
on a desktop system. The scripts currently support booting ARM, MIPS, PowerPC
and x86 (32 and 64 bit) images. The scripts can be used within the OE build 
system or externaly.

The runqemu script is run as: 

   runqemu <machine> <zimage> <filesystem>

where:

   <machine> is the machine/architecture to use (qemuarm/qemumips/qemuppc/qemux86/qemux86-64)
   <zimage> is the path to a kernel (e.g. zimage-qemuarm.bin)
   <filesystem> is the path to an ext2 image (e.g. filesystem-qemuarm.ext2) or an nfs directory
   
If <machine> isn't specified, the script will try to detect the machine name 
from the name of the <zimage> file.

If <filesystem> isn't specified, nfs booting will be assumed.

When used within the build system, it will default to qemuarm, ext2 and the last kernel and 
core-image-sato-sdk image built by the build system. If an sdk image isn't present it will look
for sato and minimal images.

Full usage instructions can be seen by running the command with no options specified.


Notes
=====

 - The scripts run qemu using sudo. Change perms on /dev/net/tun to 
   run as non root. The runqemu-gen-tapdevs script can also be used by
   root to prepopulate the appropriate network devices.
 - You can access the host computer at 192.168.7.1 within the image.
 - Your qemu system will be accessible as 192.168.7.2.
 - The script extracts the root filesystem specified under pseudo and sets up a userspace
   NFS server to share the image over by default meaning the filesystem can be accessed by
   both the host and guest systems.