[Qemu-devel] -mtdblock QEMU option

[Vipin Gahlaut]

Hi Experts,

QEMU                     1.2.0
Virtual Platform:        versatilepb
Linux Kernel:            3.5.5

Command to run QEMU:
/usr/local/bin/qemu-system-arm -M versatilepb -kernel /home/vgahlaut/labs/linux-3.5.5/arch/arm/boot/zImage -nographic -hda /home/vgahlaut/labs/disk.img -append "root=/dev/sda mem=128M console=ttyAMA0,115200"

After my system boots fine, I can see /dev/mtdblock0 but when I tried to mount mtdblock0 linux gives me error as below

/ # mount /dev/mtdblock0 mnt/
mount: mounting /dev/mtdblock0 on mnt/ failed: Invalid argument
/ # mount -t ext2 /dev/mtdblock0 mnt/
mount: mounting /dev/mtdblock0 on mnt/ failed: Invalid argument
/ # mount -t ext2 -o ro /dev/mtdblock0 mnt/
mount: mounting /dev/mtdblock0 on mnt/ failed: Invalid argument

Then I changed my command to below (added -mtdblock option)

/usr/local/bin/qemu-system-arm -M versatilepb -kernel /home/vgahlaut/labs/linux-3.5.5/arch/arm/boot/zImage -nographic -hda /home/vgahlaut/labs/disk.img -mtdblock /home/vgahlaut/labs/nand.img -append "root=/dev/sda mem=128M console=ttyAMA0,115200"

but then again I get same errors while mounting /dev/mtdblock0. I have created nand.img is created with qemu-img command and formatted with ext2 after mounting with loopback.

I didn't find much information in documentation on how to use mtdblock device with QEMU. Can someone please guide me how can I mount qemu simulated mtdblock device in linux.

Thanks in Advance.

Best Regards
Vipin