I haven’t seen a system whose default configuration supports MMU and directed I/O virtualization. Usually this requires rebooting and entering the B IOS to enable it (if needed), for example , 64-bit support for VM.
If it is turned on and you are not using virtualization, will there be some substantial processor overhead? If not, why is it closed by default?
Some proof-of-concept rootkits, like Blue Pill, can have a VT-enabled system. After this discovery, most vendors started shipping their VT-disabled devices as general safety precautions.
I haven’t seen a system whose default configuration supports MMU and directional I. /O Virtualization. Usually this requires restarting and entering B IOS to enable it (if needed), for example, 64-bit support for VMs.
If it is turned on and you are not using virtualization, Will there be some substantial processor overhead? If not, why is it closed by default?
There are some proof-of-concept rootkits, like Blue Pill, which can have a VT-enabled system. After this discovery, most vendors began to use them Devices with VT disabled are shipped as general safety precautions.