Unable to mount root fs on unknown-block(31,3)

[wbochra]

Hello, I am trying to boot my raspberry yocto build image with qemu this is the commande line i am running
qemu-system-arm -M versatilepb -cpu arm1176 -kernel /home/ubuntu/qemu_vms/qemu-rpi-kernel-master/kernel-qemu-4.4.34-jessie -append "root=/dev/sda2 panic=1 rootfstype=ext3 rw" -hda /home/ubuntu/build/tmp/deploy/images/raspberrypi/core-image-minimal-raspberrypi-20210320134208.rootfs.ext3 -m 256 -no-reboot -net nic -net user,hostfwd=tcp::5022-:22 this is the error I am facing can u help me please

ps: I tried raspbian with qemu and it runs smoothly