_   _      _  ______  ___________                        _      ____    ___    ______ _       _____             ___  ___ __  
| \ | |    | | | ___ \/  ___|  _  \                      | |    / ___|  /   |   | ___ (_)     /  ___|            |  \/  |/  | 
|  \| | ___| |_| |_/ /\ `--.| | | |   __ _  __ _ _ __ ___| |__ / /___  / /| |   | |_/ /_  __ _\ `--. _   _ _ __  | .  . |`| | 
| . ` |/ _ \ __| ___ \ `--. \ | | |  / _` |/ _` | '__/ __| '_ \| ___ \/ /_| |   | ___ \ |/ _` |`--. \ | | | '__| | |\/| | | | 
| |\  |  __/ |_| |_/ //\__/ / |/ /  | (_| | (_| | | | (__| | | | \_/ |\___  |   | |_/ / | (_| /\__/ / |_| | |    | |  | |_| |_
\_| \_/\___|\__\____/ \____/|___/    \__,_|\__,_|_|  \___|_| |_\_____/    |_/   \____/|_|\__, \____/ \__,_|_|    \_|  |_/\___/
                                                                                          __/ |                             


----------------------------------------------
NetBSD/evbarm under QEMU on the Apple MacOS M1 
----------------------------------------------

Building qemu on Big Sur M1 
---------------------------


    Clone qemu

git clone https://github.com/qemu/qemu

    Change directory to qemu repository

cd qemu

    Checkout to commit dated June 03, 2021 v6.0.0

git checkout 3c93dfa42c394fdd55684f2fbf24cf2f39b97d47

    Apply patch series v8 by Alexander Graf

curl https://patchwork.kernel.org/series/485309/mbox/ | git am

    Building qemu installer

mkdir build && cd build
../configure --target-list=aarch64-softmmu
make -j8

    Install qemu

sudo make install

---------------------------------------------------

NetBSD-evbarm aarch64 setup 


Get the latest QEMU_EFI image
-----------------------------
wget https://snapshots.linaro.org/components/kernel/leg-virt-tianocore-edk2-upstream/4276/QEMU-AARCH64/RELEASE_GCC5/QEMU_EFI.fd 

Get the latest -current ISO installer (netbsd.iso) 
--------------------------------------------------
wget http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/images/NetBSD-9.99.88-evbarm-aarch64.iso

Create qcow2 dik image 
----------------------
qemu-img create -f qcow2 disk.img 20G  

Create an empty file for persisting UEFI variables 
--------------------------------------------------- 
dd if=/dev/zero conv=sync bs=1m count=64 of=ovmf_vars.fd 

Booting the installer (arm64)
-----------------------------
qemu-system-aarch64 \
-M virt,highmem=off \
-accel hvf \
-cpu cortex-a72  \
-m 4G \
-device ramfb \
-device qemu-xhci \
-device usb-kbd \
-device usb-mouse \
-device usb-tablet \
-device virtio-blk,drive=system \
-drive if=none,id=system,media=cdrom,file=netbsd.iso \
-device usb-storage,drive=drive \
-drive if=none,id=drive,format=qcow2,file=disk.img \
-drive file=ovmf_vars.fd,if=pflash,index=1 \
-net nic,model=virtio \
-net user,hostfwd=tcp::2222-:22 \
-device virtio-rng-pci \
-bios QEMU_EFI.fd


Once installed don't forget to tweak the boot device in EFI ! 
and setup a desired resolution (1024x768 is much better in the ramfb)


Booting the system (arm64)
--------------------------
qemu-system-aarch64 \
-M virt,highmem=off \
-accel hvf \
-cpu cortex-a72  \
-m 4G \
-device ramfb \
-device qemu-xhci \
-device usb-kbd \
-device usb-mouse \
-device usb-tablet \
-device intel-hda -device hda-duplex \
-device virtio-blk,drive=system \
-drive if=none,id=system,media=cdrom,file=netbsd.iso \
-device usb-storage,drive=drive \
-drive if=none,id=drive,format=qcow2,file=disk.img \
-drive file=ovmf_vars.fd,if=pflash,index=1 \
-net nic,model=virtio \
-net user,hostfwd=tcp::2222-:22 \
-device virtio-rng-pci \
-bios QEMU_EFI.fd

You can reach the guest NetBSD over SSH from BigSur via ssh -p 2222 localhost 

# Also a good idead is to diable IPV6 support in /etc/rc.conf  

ip6addrctl=YES
ip6addrctl_policy="ipv4_prefer"