PROCESSORS, METHODS, SYSTEMS, AND INSTRUCTIONS TO DETERMINE WHETHER TO LOAD ENCRYPTED COPIES OF PROTECTED CONTAINER PAGES INTO PROTECTED CONTAINER MEMORY

• US 20190325168A1
• Filed: 06/29/2019
• Published: 10/24/2019
• Est. Priority Date: 09/23/2016
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Rozas, Carlos V., Vij, Mona, Chakrabarti, Somnath
• Granted Patent: US 11,023,622 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 21/57 Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
• CPC Class Codes: G06F 21/6245 Protecting personal data, e.g. for financial or medical purposes
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06F 9/30145 Instruction analysis, e.g. decoding, instruction word fields

Abstract

A method performed by a processor of an aspect includes accessing an encrypted copy of a protected container page stored in a regular memory. A determination is made whether the protected container page was live stored out, while able to remain useable in, protected container memory. The method also includes either performing a given security check, before determining to store the protected container page to a destination page in a first protected container memory, if it was determined that the protected container page was live stored out, or not performing the given security check, if it was determined that the protected container page was not live stored out. Other methods, as well as processors, computer systems, and machine-readable medium providing instructions are also disclosed.

Claims

1. A processor comprising:

a decode unit to decode an instruction that is to indicate a source encrypted copy of a protected container page that is to be stored in a regular memory, and that is to indicate a destination page that is to be in a first protected container memory; and

an execution unit, coupled with the decode unit, in response to the instruction, to;

determine whether the protected container page was live stored out, while able to remain useable in, protected container type memory; and

perform a given security check, before a determination to store the protected container page to the destination page, if the determination is that the protected container page was live stored out;

or

not perform the given security check, if the determination is that the protected container page was not live stored out.

2. The processor of claim 1, wherein the execution unit, in response to the instruction, is to determine whether the protected container page was live stored out including to determine whether a value indicates that the protected container page was live stored out.

3. The processor of claim 2, wherein the value is to be encrypted with the source encrypted copy of the protected container page.

4. The processor of claim 2, wherein the value is to be stored in the first protected container memory.

5. The processor of claim 2, wherein the decode unit is to decode a second instruction, and wherein the processor is to perform the second instruction to:

live store the protected container page out of the protected container type memory; and

configure the value to indicate that the protected container page was live stored out.

6. The processor of claim 1, wherein the execution unit, in response to the instruction, is to perform the given security check including to determine whether a live protected container page group store operation, which is to have been used to store a group of protected container pages including the protected container page out of the protected container type memory, is to have been completed.

7. The processor of claim 6, wherein the execution unit, in response to the instruction, is to determine not to store the protected container page to the destination page when the determination is that the live protected container page group store operation is not to have been completed.

8. The processor of claim 6, wherein the live protected container page group store operation is to be completed when all protected container pages of a protected container have been stored out of the protected container type memory which is to be of a source computer system.

9. The processor of claim 6, wherein the live protected container page group store operation is to be completed when all protected container pages of a protected container have been stored out of the protected container type memory which is to be of a source computer system to the regular memory which is to be of a destination computer system.

10. The processor of claim 6, wherein to determine whether the live protected container page group store operation is to have been completed includes to compare a snapshot value with a current value, wherein the snapshot value is to have been taken at a time when, and is not to have been updated since, the protected container page was live stored out, and wherein the current value is to have been taken at a current time, and is to have been updated since the protected container page was live stored out, if thereafter the live protected container page group store operation is to have been completed.

11. The processor of claim 10, wherein the snapshot value is to be encrypted with the encrypted copy of the protected container page, and wherein the current value is to be stored in the regular memory.

12. The processor of claim 1, wherein the execution unit, in response to the instruction, is also to access a version of the protected container page from a version structure, wherein the version structure is to be used to store both versions of protected container pages that are to have been live stored out as well as versions of protected container pages that are to have been paged out through paging.

13. The processor of claim 1, wherein the decode unit is to decode the instruction that is to indicate the source encrypted copy of the protected container page which is to be a secure enclave page, and that is to indicate the destination page that is to be in the first protected container memory which is to be an enclave page cache.

14. A processor comprising:

an interface to receive a control primitive; and

a core coupled with the interface, in response to the control primitive, to;

access an encrypted copy of a protected container page that is to be stored in a regular memory;

determine whether the protected container page was live stored out, while able to remain useable in, a second protected container memory; and

perform a given security check, before determining to store the protected container page to a destination page that is to be in a first protected container memory, if the determination is that the protected container page is to have been live stored out;

or

not perform the given security check, if the determination is that the protected container page is not to have been live stored out.

15. The processor of claim 14, wherein the core, in response to the control primitive, is to determine whether the protected container page was live stored out including to determine whether a value, which is to be one of encrypted with the encrypted copy of the protected container page and stored in the first protected container memory, is to indicate that the protected container page was live stored out.

16. The processor of claim 14, wherein the core, in response to the control primitive, is to perform the given security check including to determine whether a live protected container page group store operation, which is to have been used to store a group of protected container pages including the protected container page out of the second protected container memory, is to have been completed.

17. A method performed by a processor comprising:

accessing an encrypted copy of a protected container page stored in a regular memory;

determining whether the protected container page was live stored out, while able to remain useable in, protected container type memory; and

performing a given security check, before determining to store the protected container page to a destination page in a first protected container memory, if it was determined that the protected container page was live stored out;

or

not performing the given security check, if it was determined that the protected container page was not live stored out.

18. The method of claim 17, wherein said determining comprises determining whether a value, which is one of encrypted with the encrypted copy of the protected container page and stored in the first protected container memory, indicates that the protected container page was live stored out.

19. The method of claim 17, wherein said determining comprises determining that the protected container page was live stored, and wherein said performing the given security check including determining whether a live protected container page group store operation, which was used to store a group of protected container pages including the protected container page out of the protected container type memory, has completed.

20. The method of claim 19, wherein the live protected container page group store operation comprises a live migration of all protected container pages of a protected container from the protected container type memory, from which the protected container page was live stored out, and which is to be of a source computer system, to the regular memory, which is to be of a destination computer system.