Hypercall acceleration for nested virtual machines

A system comprising:

• a memory;
• and
• a processing device, operatively coupled to the memory, the processing device to:
• execute, by a host computer system, a Level 0 hypervisor managing a Level 1 virtual machine (VM);
• receive, by a Level 1 hypervisor managing a Level 2 VM, a first function component from a Level 2 hypervisor managing a Level 3 VM, wherein the first function component performs a first functionality associated with a hypercall issued by the Level 3 VM;
• generate, by the Level 1 hypervisor, a second function component that performs a second functionality associated with the hypercall issued by the Level 2 VM, and wherein the second function component translates the first functionality to the second functionality;
• chain, by the Level 1 hypervisor, the first function component with the second function component to generate a chain of function components;
• and
• provide the chain of function components to the Level 0 hypervisor to cause the Level 0 hypervisor to store the chain of function components in a memory space associated with the level 0 hypervisor.

A non-transitory computer readable medium comprising instructions, which when accessed by a processing device, cause the processing device to:

• execute, by a host computer system, a Level 0 hypervisor managing a Level 1 virtual machine (VM);
• receive, by the Level 0 hypervisor, a first function component from a Level 2 hypervisor managing a Level 3 VM, wherein the first function component performs a first functionality associated with a hypercall issued by the Level 3 VM;
• detect, by the Level 0 hypervisor, the hypercall issued by the Level 3 VM;
• and
• execute, by the Level 0 hypervisor, the first function component to modify a first VM context for the Level 3 VM in view of the hypercall.