Best Virtual Machine Software for VxWorks

QEMU serves as a versatile and open-source machine emulator and virtualizer, allowing users to operate various operating systems across different architectures. It enables execution of applications designed for other Linux or BSD systems on any supported architecture. Moreover, it supports running KVM and Xen virtual machines with performance that closely resembles native execution. Recently, features like complete guest memory dumps, pre-copy/post-copy migration, and background guest snapshots have been introduced. Additionally, there is new support for the DEVICE_UNPLUG_GUEST_ERROR to identify hotplug failures reported by guests. For macOS users with Apple Silicon CPUs, the ‘hvf’ accelerator is now available for AArch64 guest support. The M-profile MVE extension is also now integrated for the Cortex-M55 processor. Furthermore, AMD SEV guests can now measure the kernel binary during direct kernel boot without utilizing a bootloader. Enhanced compatibility has been added for vhost-user and NUMA memory options, which are now available across all supported boards. This expansion of features reflects QEMU's commitment to providing robust virtualization solutions that cater to a wide range of user needs.

KVM, which stands for Kernel-based Virtual Machine, serves as a comprehensive virtualization solution for Linux systems operating on x86 hardware equipped with virtualization capabilities (such as Intel VT or AMD-V). It comprises a loadable kernel module, known as kvm.ko, that underpins the essential virtualization framework, along with a processor-specific module, either kvm-intel.ko or kvm-amd.ko. By utilizing KVM, users can operate several virtual machines that run unaltered Linux or Windows operating systems. Each virtual machine is allocated its own set of virtualized hardware components, including a network interface card, storage, graphics adapter, and more. KVM is an open-source project, with its kernel component integrated into the mainline Linux kernel since version 2.6.20, while the userspace aspect has been incorporated into the mainline QEMU project starting from version 1.3. This integration enables widespread deployment and support for various virtualization applications and services.