reMarkable QEMU VM

Build Linux (I used 5.4.161) with imx_v6_v7 config

apt install bison bc lzop libssl-dev
make O=imx7 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- imx_v6_v7_defconfig
make O=imx7 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-

Download rM update file (I used 2.10.0.295)
Create qcow2 disk

./extractor/extractor.py updates/2.10.0.295_reMarkable2.signed 2.10.0.295_reMarkable2.ext4
qemu-img create -f qcow2 root.qcow2 8G
modprobe nbd
qemu-nbd -c /dev/nbd0 root.qcow2
sfdisk /dev/nbd0 <<SFD
label: dos
label-id: 0xc410b303
device: /dev/nbd0
unit: sectors
sector-size: 512

/dev/nbd0p1 : start=        2048, size=       40960, type=83
/dev/nbd0p2 : start=       43008, size=      552960, type=83
/dev/nbd0p3 : start=      595968, size=      552960, type=83
/dev/nbd0p4 : start=     1148928, size=    13793280, type=83
SFD
mkfs.vfat /dev/nbd0p1
cp 2.10.0.295_reMarkable2.ext4 /dev/nbd0p2
e2fsck -f /dev/nbd0p2
resize2fs /dev/nbd0p2
mkfs.ext4 /dev/nbd0p3
mkfs.ext4 /dev/nbd0p4
mkdir -p /mnt/root /mnt/home
mount /dev/nbd0p2 /mnt/root
mount /dev/nbd0p4 /mnt/home
cp -r /mnt/root/etc/skel /mnt/home/root
sed -i 's/mmcblk2/mmcblk1/' /mnt/root/etc/fstab
sed -i 's/wlan0/eth0/' /mnt/root/lib/systemd/system/dhcpcd.service
umount /dev/nbd0p2
umount /dev/nbd0p4
qemu-nbd -d /dev/nbd0

Start the VM

qemu-system-arm \
    -machine mcimx7d-sabre \
    -cpu cortex-a9 \
    -m 2048 \
    -kernel linux/linux-5.4.161/imx7/arch/arm/boot/zImage \
    -dtb linux/linux-5.4.161/imx7/arch/arm/boot/dts/imx7d-sbc-imx7-rm.dtb \
    -drive if=sd,file=root.qcow2,format=qcow2,index=2 \
    -append "console=ttymxc0 rootfstype=ext4 root=/dev/mmcblk1p2 rw rootwait init=/sbin/init" \
    -nographic

matteodelabre/remarkable-qemu-vm.md

Eeems commented Dec 5, 2023