• 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 — This avoids flushes on VM transitions to give a lower-cost VM transition time and an overall reduction in virtualization overhead

• Guest Preemption Timer — Mechanism for a VMM to preempt the execution of a guest OS VM after an amount of time specified by the VMM. The VMM sets a timer value before entering a guest. — The feature aids VMM developers in flexibility and Quality of Service (QoS) guarantees flexibility in guest VM scheduling and building Quality of Service (QoS) schemes

• Descriptor-Table Exiting — Descriptor-table exiting allows a VMM to protect a guest OS from internal (malicious software based) attack by preventing relocation of key system data structures like IDT (Interrupt Descriptor Table), GDT (global descriptor table), LDT (Local Descriptor Table), and TSS (Task Segment Selector) — A VMM using this feature can intercept (by a VM exit) attempts to relocate these data structures and prevent them from being tampered by malicious software

• VM Functions — A VM function is an operation provided by the processor that can be invoked using the VMFUNC instruction from guest VM without a VM exit — A VM function to perform EPTP switching is supported and allows guest VM to load a new value for the EPT pointer, thereby establishing a different EPT paging structure hierarchy

Intel® VT comprises technology components to support virtualization of platforms based on Intel architecture microprocessors and 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.

ITL:FH8066501715928S R2KP

FH8066501715928S R2KP