Raspberry Pi 4 emulation QEMU 9

[david]

youtu.be/thImUPLsEj8

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Prerequisites
Install QEMU:

On Ubuntu/Debian:
bash
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sudo apt-get install qemu-system-aarch64

Download a Raspberry Pi OS image from the official website.

https://www.raspberrypi.com/software/op ... os-64-bit

Create virtual sdcard with size 16GB and restore original Pi OS to new image:

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qemu-img create pipi.img 16G

Mount virtual sdcard image:

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modprobe nbd max_part=8
qemu-nbd --connect=/dev/nbd0 --format=raw pipi.img

Use gnome-disks to restore official 2024-10-22-raspios-bullseye-armhf.img.xz image and resize root partition of nbd0 to 16G.
Copy kernel8.img and bcm2711-rpi-4-b.dtb and place them on your host OS filesystem.

Unmount virtual sdcard image:

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qemu-nbd --disconnect /dev/nbd0
rmmod nbd

Use the following QEMU command to start the Pi4 emulation:

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qemu-system-aarch64 -machine type=raspi4b -m 2048 \
-smp 4,cores=4,threads=1,sockets=1 \
-cpu max \
-accel tcg,thread=multi \
-kernel /home/.../kernel8.img \
-dtb /home/.../bcm2711-rpi-4-b.dtb \
-serial stdio \
-usb \
-device usb-mouse \
-device usb-kbd \
-netdev user,id=net0,hostfwd=tcp::5022-:22 \
-device usb-net,netdev=net0 \
-drive "file=/home/.../pipi.img,id=mysdcard,if=sd,format=raw" \
-append 'root=/dev/mmcblk1p2 rootfstype=ext4 rootwait console=ttyAMA0,115200 loglevel=8'

It seems Pi4 has problem with USB emulation and the same configuration can be used for Pi3 that do not have problem with usb emulation it seems this is Qemu 9 problem .



Use the following QEMU command to start the Pi3 emulation:

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qemu-system-aarch64 -machine type=raspi3b -m 1024 \
-smp 4,cores=4,threads=1,sockets=1 \
-cpu max \
-accel tcg,thread=multi \
-kernel /home/.../kernel8.img \
-dtb /home/...bcm2710-rpi-3-b.dtb \
-serial stdio \
-usb \
-device usb-mouse \
-device usb-kbd \
-netdev user,id=net0,hostfwd=tcp::5022-:22 \
-device usb-net,netdev=net0 \
-drive "file=/home/.../pipi.img,id=mysdcard,if=sd,format=raw" \
-append 'root=/dev/mmcblk0p2 rootfstype=ext4 rootwait console=ttyAMA0,115200 loglevel=8'