KVM stands for Kernel Virtual Machine, where QEMU is an emulator that can also be used as a virtualizer with the help of KVM to provide a native speed by accessing Intel VT-x or AMD V technology of modern processors. In my already virtualized host, trying to pass the option the option -enable-kvm -m 1024, will fail: qemu-system-x8664 -vga std -enable-kvm -m 1024 -monitor telnet:localhost:9313,server,nowait -drive filemyimg. Probably that method of debugging nested virtualization only works in the bare metal. Qemu and KVM both are open source platforms for performing virtualization on Linux platforms. # modprobe: ERROR: could not insert 'kvm_intel': Operation not supported
It is able to emulate a full system (cpu, devices, kernel and apps) through the qemu-system-Everywhere I find information about it tells me that I must check the file /sys/module/kvm_intel/parameters/nested which is simply not available, because kvm-intel isn't and can't be loaded from inside an image: sudo modprobe kvm-intel It offers emulation of a lot of architectures and can be run on a lot of architectures.
Kvm qemu install#
Then, install essential KVM packages with the following command: sudo apt install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils.
Kvm qemu update#
Surely, this virtualized host of mine has capabilities of nesting its own virtualization. First, update the repositories: sudo apt update. # qemu running, OK, but image taking forever to load.
If I remove that option -enable-kvm -m 1024, qemu will load (but it will take forever, because it is using software emulation): qemu-system-x86_64 -vga std -monitor telnet:localhost:9313,server,nowait -drive file=my_img.img,cache=none
# failed to initialize KVM: No such file or directory # Could not access KVM kernel module: No such file or directory In my already virtualized host, trying to pass the option the option -enable-kvm -m 1024, will fail: qemu-system-x86_64 -vga std -enable-kvm -m 1024 -monitor telnet:localhost:9313,server,nowait -drive file=my_img.img,cache=none
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