Intel 807 AV8062701079702 Data Sheet

Intel TXT is a set of extensions designed to provide a measured and controlled launch

of system software that will then establish a protected environment for itself and any

additional software that it may execute.

These extensions enhance two areas:
•

The launching of the Measured Launched Environment (MLE).

•

The protection of the MLE from potential corruption.

The enhanced platform provides these launch and control interfaces using Safer Mode

Extensions (SMX).

The SMX interface includes the following functions:
•

Measured/Verified launch of the MLE.

•

Mechanisms to ensure the above measurement is protected and stored in a secure

location.

•

Protection mechanisms that allow the MLE to control attempts to modify itself.

The processor also offers additional enhancements to System Management Mode

(SMM) architecture for enhanced security and performance. The processor provides

new MSRs to:
•

Enable a second SMM range

•

Enable SMM code execution range checking

•

Select whether SMM Save State is to be written to legacy SMRAM or to MSRs

•

Determine if a thread is going to be delayed entering SMM

•

Determine if a thread is blocked from entering SMM

•

Targeted SMI, enable/disable threads from responding to SMIs both VLWs and IPI

For the above features, BIOS must test the associated capability bit before attempting

to access any of the above registers.

For more information, refer to the 

The processor supports Intel Hyper-Threading Technology (Intel HT Technology) that

allows an execution core to function as two logical processors. While some execution

resources, such as caches, execution units, and buses are shared, each logical

processor has its own architectural state with its own set of general-purpose registers

and control registers. This feature must be enabled using the BIOS and requires

operating system support.

Intel recommends enabling Intel HT Technology with Microsoft Windows* 8 ,

Windows* 8.1, and Microsoft Windows* 7 and disabling Intel HT Technology using the

BIOS for all previous versions of Windows* operating systems. For more information

5th Generation Intel

®

 Core

™

 Processor Family, Intel

®

 Core

™

 M Processor Family, Mobile Intel

®

 Pentium

®

 Processor Family, and

Mobile Intel

®

 Celeron

®

 Processor Family

Datasheet – Volume 1 of 2

March 2015

38

Order No.: 330834-004v1