Techniques for establishing virtual devices
View Patent ↗Techniques for establishing virtual devices are presented. A legacy control system is encapsulated as a virtual device. The virtual device is isolated within a host hardware associate with a host OS and access to and from the virtual device is authenticated and controlled by the host OS. Legacy hardware used by the legacy control system is connected to the host hardware, thereby permitting the legacy control system to continue to access the legacy hardware when the virtual device processes.
1. A machine-implemented method implemented in a non-transitory computer-readable storage medium for execution on a machine, comprising:
interfacing, by the machine, legacy hardware accessed by a legacy control system associated with a legacy processing environment and a first operating system (OS) to host hardware that processes a second OS; and
initiating, by the machine, the first OS having the legacy control system as a virtual image that is a guest OS on the host hardware with the second OS designated as a host OS.
2. The method of claim 1 further comprising, permitting, by the machine, the legacy control system of the virtual image, via the guest OS, to directly access the legacy hardware once the guest OS is authenticated.
3. The method of claim 1 further comprising, exposing, by the machine, a legacy device driver for a legacy device of the legacy hardware to the host OS as a generic device driver for the legacy device.
4. The method of claim 1 further comprising, exposing, by the machine, an application programming interface (API) to the legacy control system of the virtual image to the host OS, the API providing connection access between the host OS and the legacy hardware.
5. The method of claim 1 further comprising, interfacing, by the machine, host OS applications to legacy applications of the guest OS.
6. The method of claim 5 further comprising, validating, by the machine, input data passed from the host OS applications to the legacy applications before permitting the input data to be passed to the guest OS.
7. The method of claim 5 further comprising, modifying, by the machine, input data passed from the host OS applications to the legacy applications before permitting the modified input data to be passed to the guest OS.
8. The method of claim 5 further comprising, validating, by the machine, output data passed from the legacy applications to the host OS applications before permitting the output data to be passed to the host OS.
9. The method of claim 5 further comprising, modifying, by the machine, output data passed from the legacy applications to the host OS applications before permitting the modified output data to be passed to the host OS.
10. A machine-implemented method implemented in a non-transitory computer-readable storage medium for execution on a machine, comprising:
creating, by the machine, a virtual device from a legacy control system and its native Operating System (OS);
initiating, by the machine, the virtual device within host hardware of a host OS; and
permitting the legacy control system, via the virtual device, to access native hardware having native hardware interfaces from the host hardware of the host OS by using the native OS.
11. The method of claim 10 , wherein creating further includes authenticating the virtual device for access on the host OS.
12. The method of claim 11 , wherein initiating further includes establishing a secure connection between the guest OS and the host OS.
13. The method of claim 10 , wherein initiating further includes preventing external network connections to the virtual device from within the host OS.
14. The method of claim 10 , wherein permitting further includes connecting the native hardware used by the legacy control system to the host OS via the virtual device.
15. The method of claim 10 , wherein permitting further include validating input data passed from the host OS to the legacy control system and validating output data passed from the legacy control system to the host OS.
16. The method of claim 10 , wherein permitting further modifying input data before the input data is passed from the host OS to the legacy control system and modifying output data before the output data is passed from the legacy control system to the host OS.
17. The method of claim 16 , wherein modifying further includes modifying the input data and the output data via enhancement applications that process in the host OS.
18. A machine-implemented system, comprising:
host hardware having a host Operating System (OS) implemented in a non-transitory computer-readable storage medium and to process on the host hardware; and
the host hardware also having a virtual device implemented in a non-transitory computer-readable storage medium and to process on the host hardware;
wherein the virtual device represents a processing image of a legacy control system that processes within a legacy OS and that accesses legacy hardware, and the legacy OS processed as a guest OS, and access to and from the virtual device is controlled by the host OS.
19. The system of claim 18 , wherein the legacy hardware accessed by the legacy control system is interfaced to the host hardware for access by the virtual device.
20. The system of claim 18 , wherein an interface exposes the legacy hardware to the host OS and permits the host OS to access the legacy hardware.