Intel N2820 FH8065301616603 Data Sheet
Product codes
FH8065301616603
Processor Core
110
Datasheet
10.1.1
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
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
chipsets. Intel
®
Virtualization Technology for IA-32, Intel
®
64 and Intel
®
Architecture
(Intel
®
VT-x) added 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
/www.intel.com/products/processor/manuals/index.htm
Other Intel
®
VT documents can be referenced at: http://www.intel.com/technology/
virtualization/index.htm
10.1.1.1
Intel
®
VT-x Objectives
•
Robust: VMMs no longer need to use paravirtualization or binary translation. This
means that they will be able to run off-the-shelf OSs and applications without any
special steps.
means that they will be able to run off-the-shelf OSs 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.
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. Intel
of VMs and further prevents corruption of one VM from affecting others on the
same system. 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.
10.1.1.1.1
Intel
®
VT-x Features
•
Extended Page Tables (EPT)
— EPT is hardware assisted page table physical memory virtualization
— Support guest VM execution in unpaged protected mode or in real-address
mode
— It eliminates VM exits from guest OS to the VMM for shadow page-table
maintenance
•
Virtual Processor IDs (VPID)
— A VM Virtual Processor ID is used to tag processor core hardware structures
(such as TLBs) to allow a logic processor to cache information (such as TLBs) for
multiple linear address spaces
multiple linear address spaces
— This avoids flushes on VM transitions to give a lower-cost VM transition time and
an overall reduction in virtualization overhead