Build Kernel for qemu

[mxchi]

Hi I try to run a virtual raspberry pi with Qemu.

I configure the build with the following commands

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export ARCH=arm
export CROSS_COMPILER=arm-linux-gnueabli-
make bcmrpi_defconfig
make -j 4 all

Then,I get a zip kernel image

zImage

and run the virtual machine with command

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qemu-system-arm 
 -M versatilepb 
 -cpu arm1176 -m 256 
 -kernel zImage
 -hda SDCard.img 
 -nographic 
 -append "root=/dev/sda2"

However, the virtual machine doesn't start up as expected, can some tell me which part is wrong?
Can somebody tell me how to run a virtual Pi properly?

Thanks a lot

[PIstolero]

Did you patch the kernel for qemu before you compile it?

[mxchi]

Did you patch the kernel for qemu before you compile it?

Is there a patch for qemu? would you show me the link please

[PIstolero]

Patch it for qemu with this:
http://xecdesign.com/downloads/linux-qe ... -arm.patch
The kernel has changed since this aptch was released so you will get this error message:

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patching file arch/arm/mach-versatile/Kconfig
patching file arch/arm/mm/Kconfig
Hunk #1 succeeded at 71 (offset -36 lines).
Hunk #2 succeeded at 89 (offset -36 lines).
Hunk #3 succeeded at 127 (offset -36 lines).
Hunk #4 succeeded at 135 (offset -36 lines).
Hunk #5 FAILED at 391.
1 out of 5 hunks FAILED -- saving rejects to file arch/arm/mm/Kconfig.rej

So you just have to patch hunk#5 from hand with an editor. It is important, else it will not work.

Don´t do "make bcmrpi_defconfig" but do "make ARCH=arm versatile_defconfig" because you are emulating a versatilePB
Then you have to add some things like ext4 support, SCSI controller support that it works in qemu.
I used this how-to, it is not up to date, you have to add some things like ext4 with make ARCH=arm menuconfig for raspbian and patch a file yourself (see above):
http://xecdesign.com/compiling-a-kernel/

P.S: Here you can a find a 3.2.27 and a 3.6.y kernel for qemu and raspbian from me:
http://www.raspberrypi.org/phpBB3/viewtopic.php?t=16081