VMInstr

VMInstr is a term that refers to a virtual machine instruction. In the context of computer science, a virtual machine (VM) is a software-based emulation of a physical computer system. This virtual environment executes its own operating system and applications, isolated from the host hardware. To manage and execute these guest environments, virtual machines rely on a set of instructions that are specific to their internal architecture, distinct from the instructions executed by the host's CPU. These are known as VM instructions.

These instructions are part of the instruction set architecture (ISA) of the virtual machine. When an application running within a VM needs to perform an operation, it generates a VM instruction. This instruction is then interpreted or compiled by the virtual machine monitor (VMM), also known as the hypervisor, which translates it into instructions that the underlying physical hardware can understand and execute. This translation process allows the VM to run software that might not be directly compatible with the host system's hardware. Different virtualization technologies and VM architectures may have their own unique sets of VM instructions. Understanding VM instructions is crucial for comprehending how virtual machines function and for tasks related to performance optimization and security within virtualized environments.