Protection domain groups

• US 20040205379A1
• Filed: 03/27/2003
• Published: 10/14/2004
• Est. Priority Date: 03/27/2003
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Garcia, David J., Hilland, Jeffrey
• Granted Patent: US 8,291,176 B2
• Time in Patent Office: Days
• US Class Current: 714/5
• CPC Class Codes: H04L 63/104 Grouping of entities

Abstract

The disclosed embodiments may relate to protection domain group, which may include a memory region associated with a process. The protection domain group may also include a plurality of memory windows associated with the memory region. Also included may be a plurality of protection domains, each of which may correspond to a memory window. The protection domains may allow access to the memory region via a corresponding memory window.

Claims

1. A protection domain group, comprising:

a memory region associated with a process;

a plurality of memory windows associated with the memory region; and

a plurality of protection domains, each of the protection domains corresponding to a memory window;

each of the plurality of protection domains being adapted to allow access to the memory region via the corresponding one of the plurality of memory windows.

2. The protection domain group set forth in claim 1, wherein a queue pair is associated with each of the plurality of protection domains.

3. The protection domain group set forth in claim 1 wherein attributes of the protection domain group are defined in a translation and protection table (“

TPT”

).

4. The protection domain group set forth in claim 3, wherein the translation and protection table (“

TPT”

) contains a mask that defines the plurality of protection domains.

5. The protection domain group set forth in claim 1, wherein a mask defines the plurality of protection domains.

6. The protection domain group set forth in claim 5, wherein the mask corresponds to the total number of the plurality of protection domains.

7. The protection domain group set forth in claim 1, wherein a link list defines the plurality of protection domains.

8. The protection domain group set forth in claim 1 wherein access to the memory region is permitted if a requesting device corresponding to one of the plurality of protection domains issues a request to access the memory region.

9. The protection domain group set forth in claim 1 wherein access to the memory region is permitted if a requesting queue pair corresponding to one of the plurality of protection domains issues a request to access the memory region.

10. A computer system, comprising:

a processor;

a storage device that is adapted to store data for use by the processor;

a user input device that is adapted to receive input from a user; and

a system memory that is adapted to store data retrieved from the storage device for access by the processor, the system memory being organized into a protection domain group, the protection domain group comprising;

a memory region associated with a process;

a plurality of memory windows associated with the memory region; and

a plurality of protection domains, each of the protection domains corresponding to a memory window;

each of the plurality of protection domains being adapted to allow access to the memory region via the corresponding one of the plurality of memory windows.

11. The computer system set forth in claim 10, wherein a queue pair is associated with each of the plurality of protection domains.

12. The computer system set forth in claim 10, wherein attributes of the protection domain group are defined in a translation and protection table (“

TPT”

).

13. The computer system set forth in claim 12, wherein the translation and protection table (“

TPT”

) contains a mask that defines the plurality of protection domains.

14. The computer system set forth in claim 10, wherein a mask defines the plurality of protection domains.

15. The computer system set forth in claim 14, wherein the mask corresponds to the total number of the plurality of protection domains.

16. The protection domain group set forth in claim 10, wherein a link list defines the plurality of protection domains.

17. The computer system set forth in claim 10, wherein access to the memory region is permitted if a requesting device corresponding to one of the plurality of protection domains issues a request to access the memory region.

18. The computer system set forth in claim 10, wherein access to the memory region is permitted if a requesting queue pair corresponding to one of the plurality of protection domains issues a request to access the memory region.

19. A method of creating a protection domain group, the method comprising the acts of:

defining a memory region, the memory region being associated with a process;

defining a plurality of memory windows associated with the memory region; and

creating a plurality of protection domains, each of the protection domains corresponding to a memory window;

each of the plurality of protection domains being adapted to allow access to the memory region via the corresponding one of the plurality of memory windows.

20. The method set forth in claim 19, comprising associating a queue pair with each of the plurality of protection domains.

21. The method set forth in claim 19, comprising defining attributes of the protection domain group in a translation and protection table (“

TPT”

).

22. The method set forth in claim 19, comprising defining a mask that corresponds to the plurality of protection domains in the translation and protection table (“

TPT”

).

23. The method set forth in claim 19, comprising defining a mask that corresponds to the plurality of protection domains.

24. The method set forth in claim 19, comprising defining a mask that corresponds to the total number of the plurality of protection domains.

25. The method set forth in claim 19, comprising defining a link list that corresponds to the plurality of protection domains.

26. The method set forth in claim 19, comprising allowing access to the memory region if a requesting device corresponding to one of the plurality of protection domains issues a request to access the memory region.

27. The method set forth in claim 19, comprising allowing access to the memory region if a requesting queue pair corresponding to one of the plurality of protection domains issues a request to access the memory region.

28. A method of managing a memory access in a computer system, the computer system having a protection domain group comprising a plurality of protection domains, each of the protection domains corresponding to a memory window, a memory region, the method comprising the acts of:

receiving a request for memory access from a queue pair, the queue pair having a queue pair context that includes data that specifies an associated protection domain;

evaluating the data that specifies an associated protection domain to determine if the associated protection domain is one of the plurality of protection domains;

performing the request for memory access if the associated protection domain is one of the plurality of protection domains.

29. The method set forth in claim 28, comprising comparing a mask that specifies the plurality of protection domains to determine if the associated protection domain is one of the plurality of protection domains.

30. The method set forth in claim 28, comprising terminating a connection if the associated protection domain is not one of the plurality of protection domains.