Systems and methods for configuration of hot-inserted device prior to operating system control of device

1. An information handling system comprising:

a processor; and

a port configured to couple a hot-pluggable device received in the information handling system to the processor, the port comprising a hot-plug controller configured to:

detect insertion of the hot-pluggable device into the information handling system; and

delay communication of a hot-plug interrupt to an operating system executing on the processor in response to the insertion of the hot-pluggable device in order to allow for platform-specific configuration of the hot-pluggable device, wherein the delaying includes simulating responses to bus scans to the operating system to indicate to the operating system that the hot-pluggable device is not present, despite the presence of the hot-pluggable device.

2. The information handling system of claim 1 , wherein the port comprises a root port integral to the processor.

3. The information handling system of claim 1 , wherein the port comprises a downstream port of a switch communicatively interfaced between the processor and the hot-pluggable device.

4. The information handling system of claim 1 , wherein the platform-specific configuration of the hot-pluggable device comprises at least one of changing a class code of a controller associated with the hot-pluggable device and applying a digital key for unlocking the device.

5. The information handling system of claim 1 , wherein delaying communication of the hot-plug interrupt comprises delaying communication of the hot-plug interrupt for a fixed period of time.

6. The information handling system of claim 1 , wherein simulating responses to the bus scans includes responding to a Configuration Read with an Unsupported Request message.

7. The information handling system of claim 1 , wherein delaying communication of the hot-plug interrupt comprises ceasing of delaying communication of the hot-plug interrupt in response to completion of the platform-specific configuration.

8. A method comprising:

detecting insertion of a hot-pluggable device into an information handling system comprising a processor and a port configured to couple the hot-pluggable device to the processor; and

delaying communication of a hot-plug interrupt to an operating system executing on the processor in response to the insertion of the hot-pluggable device in order to allow for platform-specific configuration of the hot-pluggable device, wherein the delaying includes simulating responses to bus scans to the operating system to indicate to the operating system that the hot-pluggable device is not present, despite the presence of the hot-pluggable device.

9. The method of claim 8 , wherein the port comprises a root port integral to the processor.

10. The method of claim 8 , wherein the port comprises a downstream port of a switch communicatively interfaced between the processor and the hot-pluggable device.

11. The method of claim 8 , wherein the platform-specific configuration of the hot-pluggable device comprises at least one of changing a class code of a controller associated with the hot-pluggable device and applying a digital key for unlocking the device.

12. The method of claim 8 , wherein delaying communication of the hot-plug interrupt comprises delaying communication of the hot-plug interrupt for a fixed period of time.

13. The method of claim 8 , wherein simulating responses to the bus scans includes responding to a Configuration Read with an Unsupported Request message.

14. The method of claim 8 , wherein delaying communication of the hot-plug interrupt comprises ceasing of delaying communication of the hot-plug interrupt in response to completion of the platform-specific configuration.

15. The method of claim 8 , wherein delaying communication of the hot-plug interrupt to the operating system is performed by the port.

16. The method of claim 8 , wherein delaying communication of the hot-plug interrupt to the operating system is performed by the hot-pluggable device.

17. The method of claim 16 , wherein delaying communication of the hot-plug interrupt to the operating system comprises, by the hot-pluggable device, delaying assertion of one or more signals indicating insertion of the hot-pluggable device.

18. A hot-pluggable device comprising circuitry configured to, in response to insertion of the hot-pluggable device into an information handling system, delay communication of a hot-plug interrupt to an operating system executing on the information handling system in response to the insertion of the hot-pluggable device in order to allow for platform-specific configuration of the hot-pluggable device, wherein the delaying includes simulating responses to bus scans to the operating system to indicate to the operating system that the hot-pluggable device is not present, despite the presence of the hot-pluggable device.

19. The hot-pluggable device of claim 18 , wherein the platform-specific configuration of the hot-pluggable device comprises at least one of changing a class code of a controller associated with the hot-pluggable device and applying a digital key for unlocking the device.

20. The hot-pluggable device of claim 18 , wherein delaying communication of the hot-plug interrupt comprises delaying communication of the hot-plug interrupt for a fixed period of time.

21. The hot-pluggable device of claim 18 , wherein simulating responses to the bus scans includes responding to a Configuration Read with an Unsupported Request message.

22. The hot-pluggable device of claim 18 , wherein delaying communication of the hot-plug interrupt comprises ceasing of delaying communication of the hot-plug interrupt in response to completion of the platform-specific configuration.