Windows 11 on Asahi Linux (QEMU)

# References:
#  - Davide Cavalca from the Asahi team on Matrix
#  - https://gist.github.com/Vogtinator/293c4f90c5e92838f7e72610725905fd
#  - https://www.tomshardware.com/how-to/bypass-windows-11-tpm-requirement
#  - https://www.tomshardware.com/how-to/install-windows-11-without-microsoft-account
#  - https://github.com/virtio-win/kvm-guest-drivers-windows/wiki/Driver-installation

# Download prerequisites
# - virtio-win.iso
#   - From: https://github.com/virtio-win/kvm-guest-drivers-windows/wiki/Driver-installation
# - Win11_24H2_English_Arm64.iso
#   - From: https://www.microsoft.com/en-us/software-download/windows11arm64

# Install prerequisites
sudo dnf5 install qemu-system-aarch64 qemu-img

# Create a disk image
qemu-img create -f qcow2 win11.qcow2 64G

# Install Windows
performance_cores=$(awk '
  /^processor/ { proc=$3 }
  /^CPU part/ {
    if ($4 == "0x023" || $4 == "0x025" || $4 == "0x029" || $4 == "0x033" || $4 == "0x035" || $4 == "0x039")
      procs=procs ? procs","proc : proc
  } END { print procs }
' /proc/cpuinfo)

taskset -c "$performance_cores" \
  qemu-system-aarch64 \
    -M virt \
    -cpu host \
    -accel kvm \
    -m 10G \
    -smp $(nproc) \
    -device ramfb \
    -bios /usr/share/edk2/aarch64/QEMU_EFI.fd \
    -device qemu-xhci \
    -device usb-kbd \
    -device usb-tablet \
    -drive file=Win11_24H2_English_Arm64.iso,media=cdrom,if=none,id=inst \
    -device usb-storage,drive=inst \
    -drive file=virtio-win-0.1.266.iso,media=cdrom,if=none,id=iso \
    -device usb-storage,drive=iso \
    -drive file=win11.qcow2,if=virtio \
    -nic user,model=virtio-net-pci,mac=2A:50:A7:4E:D9:C4

## Bypass TPM:
#  - During first installation screen, press Shift+Fn+F10
#  - Type regedit
#  - Navigate to HKEY_LOCAL_MACHINE\SYSTEM\Setup
#  - Create a new Key; name it LabConfig
#  - Under LabConfig, create two DWORD values BypassTPMCheck and BypassSecureBootCheck and BypassRAMCheck, and set each to 1
#  - Close regedit and cmd and continue the installation as normal

## Installation process:
#  - When asked for a product key, click on "I don't have a product key"
#  - Select any version, for example Pro
#  - At disk selection screen, click on Load Driver, Browse, then navigate to E:\viostor\w11\ARM64, then install that driver
#  - Then create a partition and choose partition 3
#  - Installation might get stuck at 42% or such for 30mins or so.. it's not stuck
#  - The VM may reboot a couple of times before installation completes.
#  - Complete the installation until it asks for network, click Install Driver then install NetKVM by going to E:\NetKVM\w11\ARM64
#  - The VM may reboot a couple of more times and installs updates.
#  - Next, install the virtio drivers
#  - Reboot and now can use the command below to boot the VM

## Skipping account creation during setup
#  - Once installation gets to the point where it requires an account
#  - Press Shift+Fn+F10 and type oobe\bypassnro and press Enter. The machine will reboot
#  - After the reboot, press Shift+Fn+F10 again and type ipconfig /release and hit enter, then continue the installation
#  - When asked about connecting to a network, click "I don't have Internet"
#  - Once we make it to Desktop, the next step is to install the guest tools. Navigate to E:\ and click on "virtio-win-guest-tools.exe"
#  - Use the installer to install all the drivers.
#  - At this point, the VM is ready to switch to the virtio drivers. Shutdown the VM.
#  - From this point on, you can use the following command to start the VM:

performance_cores=$(awk '
  /^processor/ { proc=$3 }
  /^CPU part/ {
    if ($4 == "0x023" || $4 == "0x025" || $4 == "0x029" || $4 == "0x033" || $4 == "0x035" || $4 == "0x039")
      procs=procs ? procs","proc : proc
  } END { print procs }
' /proc/cpuinfo)

taskset -c "$performance_cores" \
  qemu-system-aarch64 \
    -M virt \
    -cpu host \
    -accel kvm \
    -m 10G \
    -smp $(nproc) \
    -bios /usr/share/edk2/aarch64/QEMU_EFI.fd \
    -device qemu-xhci \
    -device usb-kbd \
    -device usb-tablet \
    -drive file=win11.qcow2,if=virtio \
    -nic user,model=virtio-net-pci \
    -object rng-random,filename=/dev/urandom,id=rng0 \
    -device virtio-rng-pci,rng=rng0 \
    -audio driver=pipewire,model=virtio \
    -device virtio-gpu-pci \
    -display sdl,gl=on \
    -device usb-kbd \
    -device usb-tablet

## Post installation notes:
#  - Maximize the QEMU window to get higher display resolution.
#  - Note that the first boot will take a while without a display. Just showing "Display output is not active". This is normal and goes away once the VM fully boots after a few mins.
#  - Feel free to attach more devices or pass peripherals through by adjusting the command line above. Check QEMU docs/forums for more details.