wiki/virt/host/vmm.md

KVM-related virtual machine monitors

The Kernel-based Virtual Machine (KVM) module for Linux can be leveraged by many virtual machine monitors (VMMs) to achieve near native performance.

QEMU

QEMU is a very popular emulator which can be used alongside to KVM to leverage hardware-assisted acceleration as found in modern CPUs. In this mode, as used as a virtualizer in QEMU lingo, it can run guest code directly on the host CPU.

crosvm

crosvm is the Chrome OS Virtual Machine Monitor. It is integrated with the Chromium Operating System

cloud-hypervisor

firecracker

Comparaison

See Joplin note under Phyllome OS

	QEMU	crosvm	cloud-hypervisor
Firmware	SeaBIOS / OVMF	SeaBIOS / OVMF	Modified OVMF / RHF
PS/2 devices	Yes	Yes	No
USB Controller	Yes	Yes	No
SATA Controller	No	Yes	No
IDE Controller	Yes	No	No
Floppy Controller	Yes	No	No
TPM Support	No	Yes	No?
PCI-Express Bus	No	Yes	Yes
PCI Bus	Yes	No?	No?
Virtual Function I/O	No	Yes	Yes

Resources

QEMU documentation

https://github.com/firecracker-microvm/firecracker/blob/main/docs/vsock.md

https://github.com/firecracker-microvm/firecracker/blob/main/docs/design.md

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