Virtual machine exit processing accelerator
Systems and methods for implementing a virtual machine (VM) exit processing accelerator. An example method comprises: intercepting, by a VM exit processing accelerator, a VM exit associated with the virtual machine; responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, processing the VM exit by the VM exit processing accelerator; and resuming execution of the virtual machine.
1. A method, comprising:
storing, in a memory location, a virtual machine (VM) exit handler address specified by a processor-specific data structure associated with a virtual machine;
intercepting, by a VM exit processing accelerator, a VM exit associated with the virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, processing the VM exit by the VM exit processing accelerator; and
resuming execution of the virtual machine.
2. The method of claim 1 , further comprising:
responsive to determining that the identifier of the reason of the VM exit satisfies a second condition, processing the VM exit by a thin hypervisor referenced by the VM exit handler address stored in the memory location, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application being executed in a non-privileged execution mode.
3. The method of claim 1 , further comprising:
installing a second VM exit processing accelerator in a chained fashion.
4. The method of claim 3 , wherein
installing the second VM exit processing accelerator further comprises:
storing, in the processor-specific data structure, an address of the second VM exit processing accelerator.
5. The method of claim 3 , further comprising:
processing the VM exit by the second VM exit processing accelerator.
6. The method of claim 1 , wherein
determining that the identifier of the reason of the VM exit satisfies the first condition further comprises reading the identifier from the processor-specific data structure.
7. The method of claim 1 , wherein
the VM exit processing accelerator is executed in a privileged execution mode.
8. A system, comprising:
a memory; and
a processing device coupled to the memory, the processing device configured to:
intercept, by a virtual machine (VM) exit processing accelerator, a VM exit associated with a virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, process the VM exit by a thin hypervisor, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application running in a non-privileged execution mode; and
resume execution of the virtual machine; wherein
intercepting the VM exit further comprises storing, in a memory location, a VM exit handler address specified by a processor-specific data structure associated with the virtual machine.
9. A non-transitory computer-readable storage medium comprising executable instructions that, when executed by a processing device, cause the processing device to:
store, in a memory location, a virtual machine (VM) exit handler address specified by a processor-specific data structure associated with a virtual machine;
intercept, by a VM exit processing accelerator, a VM exit associated with the virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, process the VM exit by the VM exit processing accelerator; and
resume execution of the virtual machine.
10. The non-transitory computer-readable storage medium of claim 9 , further comprising executable instructions that, when executed by the processing device, cause the processing device to:
responsive to determining that the identifier of the reason of the VM exit satisfies a second condition, process the VM exit by a thin hypervisor referenced by the VM exit handler address stored in the memory location, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application being executed in a non-privileged execution mode.
11. The non-transitory computer-readable storage medium of claim 9 , further comprising executable instructions that, when executed by the processing device, cause the processing device to:
install a second VM exit processing accelerator in a chained fashion.
12. The non-transitory computer-readable storage medium of claim 11 , wherein installing the second VM exit processing accelerator further comprises:
store, in the processor-specific data structure, an address of the second VM exit processing accelerator.
13. The non-transitory computer-readable storage medium of claim 11 , further comprising executable instructions that, when executed by the processing device, cause the processing device to:
process the VM exit by the second VM exit processing accelerator.
14. The non-transitory computer-readable storage medium of claim 9 , wherein determining that the identifier of the reason of the VM exit satisfies the first condition further comprises reading the identifier from the processor-specific data structure.
15. The non-transitory computer-readable storage medium of claim 9 , wherein the VM exit processing accelerator is executed in a privileged execution mode.
16. A system, comprising:
a memory; and
a processing device coupled to the memory, the processing device configured to:
intercept, by a virtual machine (VM) exit processing accelerator, a VM exit associated with a virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, process the VM exit by a thin hypervisor, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application running in a non-privileged execution mode; and
resume execution of the virtual machine; wherein
the processing device is further configured to responsive to determining that the identifier of the reason of the VM exit satisfies a second condition, process the VM exit by the VM exit accelerator.
17. A system, comprising:
a memory; and
a processing device coupled to the memory, the processing device configured to:
intercept, by a virtual machine (VM) exit processing accelerator, a VM exit associated with a virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, process the VM exit by a thin hypervisor, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application running in a non-privileged execution mode; and
resume execution of the virtual machine; wherein
the processing device is further configured to install a second VM exit processing accelerator in a chained fashion; and
installing the second VM exit processing accelerator comprises:
storing, in a memory location, a VM exit handler address specified by the processor-specific data structure; and
storing, in the processor-specific data structure, an address of the second VM exit processing accelerator.
18. A system, comprising:
a memory; and
a processing device coupled to the memory, the processing device configured to:
intercept, by a virtual machine (VM) exit processing accelerator, a VM exit associated with a virtual machine;
responsive to determining that an identifier of a reason of the VM exit satisfies a first condition, process the VM exit by a thin hypervisor, wherein the thin hypervisor provides an interface between the virtual machine and a virtualization application running in a non-privileged execution mode; and
resume execution of the virtual machine; wherein
intercepting the VM exit further comprises storing, in a memory location, a VM exit handler address specified by a processor-specific data structure associated with the virtual machine; and
determining that the identifier of the reason of the VM exit satisfies the first condition further comprises reading the identifier from the processor-specific data structure.