Hypercall acceleration for nested virtual machines

A system comprising:

• a memory;
• and
• a processing device, operatively coupled to the memory, the processing device configured to:
• execute 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, wherein the first function component performs a first modification of a context of the Level 2 VM;
• generate, by the Level 1 hypervisor, a second function component that performs a second functionality associated with the hypercall issued by the Level 3 VM;
• and
• responsive to detecting the hypercall issued by the Level 3 VM, cause the Level 0 hypervisor to
• directly perform, without transferring control away from the Level 0 hypervisor and using the first function component and the second function component, the first modification of the context of the Level 2 VM.

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

• execute 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, wherein the first function component performs a first modification of a context of the Level 2 VM;
• generate, by the Level 1 hypervisor, a second function component that performs a second functionality associated with the hypercall issued by the Level 3 VM;
• and
• responsive to detecting the hypercall issued by the Level 3 VM, cause the Level 0 hypervisor to
• directly perform, without transferring control away from the Level 0 hypervisor and using the first function component and the second function component, the first modification of the context of the Level 2 VM.