software-virt

Simulate the simulation

containers
- crun
  - krun to run OCI containers as KVM's
- podman
- kind
firejail
qemu
- -M microvm
- binfmt for running binaries for other archs
- ovmf/vfio for gpu pass through to vms
  - must have second card as sharing/virtualization is not supported on older cards
    - vGpus are software locked but available as cloud offerings (grid etc)
    - https://github.com/Arc-Compute/LibVF.IO for supported cards
    - https://github.com/OpenMdev/GVM-user for supported cards
- free-page-reporting=on to return guest memory to host (disable transparent huge pages on the guest as they will never be freed)

#!/usr/bin/env bash
qemu-system-x86_64 -nic user,model=virtio-net-pci,hostfwd=tcp::8081-:8081,hostfwd=tcp::8080-:8080 -enable-kvm -m 2570 -device virtio-blk,drive=myhd -drive if=none,file=/My-image.qcow2,id=myhd -spice port=5930,disable-ticketing

qemu-system-x86_64 -enable-kvm \
        -cpu host \
        -drive file=WindowsVM.img,if=virtio \
        -nic user,model=virtio-net-pci,hostfwd=tcp::10022-:9022 \
        -m 4G -vga qxl -spice port=5930,disable-ticketing=on \
        -audiodev alsa,id=snd0,out.try-poll=off -device ich9-intel-hda -device hda-output,audiodev=snd0 \
        -name "Windows" \
        "$@"
#        -monitor stdio \
        #-audio driver=sdl,model=virtio \
# use cdrom drive and add virtio drivers
#./run-windows.sh -boot d -drive file=w10prox64.iso,media=cdrom -drive file=virtio-win-0.1.240.iso,media=cdrom # https://github.com/virtio-win/virtio-win-pkg-scripts/blob/master/README.md for kvm virtio drivers
# -device virtio-sound-pci,audiodev=my_audiodev -audiodev alsa,id=my_audiodev

firecracker
- 5.10 lts kernel
- snapshots for faster boot after creation
mesa opengl env var LIBGL_ALWAYS_SOFTWARE=true
ebpf
- non turing complete register vm
- CO-RE and BTF for portability
- tools
  - bpftrace
  - bcc
Hyper-V supports gpu virtualization via GPU-P with VMGPUPartitionAdapter for Msvm_PartitionableGpu
- only certain models supported through the driver nvidia grid. Some cards only support passthrough.

Virtualization