Intel E5-4650 BX80621E54650 ユーザーズマニュアル

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BX80621E54650
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Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
79
Datasheet Volume One
Technologies
3
Technologies
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
• 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 spec and 
other Intel VT documents can be referenced at 
.
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 platform. By using Intel VT-x, a VMM is: 
• Robust: VMMs no longer need to use para-virtualization or binary translation. This 
means that they will be able to run off-the-shelf OS’s and applications 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.