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3 Technologies
This chapter covers the following technologies:
• Intel
®
Virtualization Technology (Intel
®
VT)
• Security Technologies
• Intel
®
Hyper-Threading Technology (Intel
®
HT Technology)
• Intel
®
Turbo Boost Technology
• Enhanced Intel
®
SpeedStep
®
Technology
• Intel
®
Advanced Vector Extensions (Intel
®
AVX)
3.1 Intel
®
Virtualization Technology (Intel
®
VT)
Intel
®
Virtualization Technology (Intel
®
VT) makes a single system appear as multiple
independent systems to software. This allows multiple, independent operating systems
to run simultaneously on a single system. Intel VT comprises technology components
to support virtualization of platforms based on Intel architecture microprocessors and
chipsets.
• Intel
®
Virtualization Technology (Intel
®
VT) for Intel
®
64 and IA-32 Intel
®
Architecture (Intel
®
VT-x) adds hardware support in the processor to improve
the virtualization performance and robustness. Intel VT-x specifications and
functional descriptions are included in the Intel
®
64 and IA-32 Architectures
Software Developer’s Manual, Volume 3B and is available at
http://www.intel.com/products/processor/manuals/index.htm
• Intel
®
Virtualization Technology (Intel
®
VT) for Directed I/O
(Intel
®
VT-d) adds processor and uncore implementations to support and
improve I/O virtualization performance and robustness. The Intel VT-d specification
and other Intel VT documents can be referenced at
http://www.intel.com/technology/virtualization/index.htm
3.1.1 Intel
®
VT-x Objectives
Intel VT-x provides hardware acceleration for virtualization of IA platforms. Virtual
Machine Monitor (VMM) can use Intel VT-x features to provide improved reliable
virtualized platforms. By using Intel VT-x, a VMM is:
• Robust: VMMs no longer need to use para-virtualization or binary translation. This
means that off-the-shelf operating systems and applications can be run without any
special steps.
• Enhanced: Intel VT enables VMMs to run 64-bit guest operating systems on IA x86
processors.
• More reliable: Due to the hardware support, VMMs can now be smaller, less
complex, and more efficient. This improves reliability and availability and reduces
the potential for software conflicts.
• More secure: The use of hardware transitions in the VMM strengthens the isolation
of VMs and further prevents corruption of one VM from affecting others on the
same system.