Caching information for kernel and boot components

• US 20070143223A1
• Filed: 12/16/2005
• Published: 06/21/2007
• Est. Priority Date: 12/16/2005
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Hsu, Wen-Pin, Zhang, Ning, Gunyakti, Caglar, Lelikov, Andrey, Bhave, Ajay
• Application Number:
  US11/305,640
• Publication Number:
  US 20070143223A1
• Time in Patent Office: Days
• US Class Current: 705/59
• CPC Class Codes: G06F 21/575 Secure boot

Abstract

A cache is provided that stores licensing policies and information for components. The cache is available early in the boot cycle, such as during initialization and startup of the operating system, for use by the kernel and early boot components. Kernel and early boot components can then call a kernel application programming interface (API) to query the policy values. The policy values are read from a registry value into memory very early in the boot sequence. Using the kernel cache, the system may be started with proper licensable limits.

Claims

1. A licensing policy method for a kernel or early boot component, comprising:

retrieving a licensing policy for a kernel or early boot component from a cache; and

setting a licensable limit for the kernel or early boot component based on the licensing policy.

2. The method of claim 1, further comprising providing the cache with the licensing policy prior to retrieving the licensing policy.

3. The method of claim 2, wherein providing the cache with the licensing policy comprises receiving the licensing policy from a registry.

4. The method of claim 3, further comprising assembling the licensing policy and populating the licensing policy to the registry.

5. The method of claim 1, wherein retrieving the licensing policy from the cache comprises accessing the data via a callable interface.

6. The method of claim 1, further comprising setting the licensing policy to a hard coded default value if the cache does not contain the licensing policy for the kernel or early boot component.

7. The method of claim 1, further comprising providing the kernel or early boot component with the licensing policy.

8. The method of claim 1, further comprising detecting tampering and providing a notification regarding the tampering.

9. The method of claim 1, further comprising changing a licensing policy and notifying an affected component.

10. A licensing policy system, comprising:

a cache comprising a licensing policy for a kernel or early boot component; and

a callable interface for accessing the licensing policy in the cache.

11. The system of claim 10, further comprising a kernel memory which comprises the cache.

12. The system of claim 10, further comprising a kernel cache registry comprising a copy of the cache.

13. The system of claim 10, wherein the cache is available early in a boot cycle for the kernel or early boot component.

14. The system of claim 10, wherein the callable interface comprises a method to query the cache for the licensing policy.

15. The system of claim 10, further comprising an application for receiving the licensing policy and setting a licensable limit for the kernel or early boot component based on the licensing policy.

16. The system of claim 10, wherein the licensing policy is set to a hard coded default value.

17. A computer-readable medium having stored thereon a data structure, comprising:

a first data field containing data representing a kernel memory; and

a second data field containing data representing a licensing policy cache.

18. The computer-readable medium of claim 17, wherein the licensing policy cache comprises data representing a licensing policy for a kernel or early boot component.

19. The computer-readable medium of claim 17, wherein the licensing policy cache is populated with data from a registry.

20. The computer-readable medium of claim 17, wherein the licensing policy cache is emptied upon detection of tampering.