Ii qemu-system-x86 2.0.0+dfsg-2ubuntu1.22 amd64 QEMU full system emulation binaries (x86) Ii qemu-system-common 2.0.0+dfsg-2ubuntu1.22 amd64 QEMU full system emulation binaries (common files) Ii qemu-kvm 2.0.0+dfsg-2ubuntu1.22 amd64 QEMU Full virtualization Ii qemu-keymaps 2.0.0+dfsg-2ubuntu1.22 all QEMU keyboard maps SPICE may need guest side components to be installed and/or built into QEMU. (for video acceleration you might have to change command as following: remove the existing -vga vmware qemu-kvm option, and add these options: -vga qxl -device virtio-serial-pci -spice port=5900,password=mypass -device virtserialport,chardev=spicechannel0,name=.0 -chardev spicevmc,id=spicechannel0,name=vdagent) Spicy - from sudo apt-get install spice-client-gtk Virt-viewer - video acceleration and clipboard sharing etrc. Virt-manager - v1.0+ graphical manager for the vms. This difference is quite clear from the description on the QEMU website.

When QEMU uses KVM for hardware acceleration, the combination becomes a Type-1 hypervisor. It intercepts the instructions meant for Virtual CPU and uses the host operating system to get those instructions executed on the physical CPU. QEMU without KVM uses TCG or Tiny Code Generator to optimally translate and execute the Virtual CPU instructions on the physical CPU.

If your server CPU does not support virtualization extension, then it is the job of the emulator (or hypervisor) to execute the Virtual CPU instruction using translation. KVM needs QEMU to provide full hypervisor functionality. Hence the instructions meant for the Virtual CPU can be directly executed the physical CPU slice.īy itself, KVM is more of a virtualization infrastructure provider. Using these technologies, a slice of physical CPU can be directly mapped to the Virtual CPU. KVM is the Linux kernel module that enables this mapping of physical CPU to Virtual CPU.

Qemu vs virtualbox vs vmware