UG
Unrestricted Guest の略
VT-xの機能の一つ
In 2010, Westmere added support for launching the logical processor directly in real mode – a feature called "unrestricted guest", which requires EPT to work.
x86 virtualization
The first processors to support VMX operation require CR0.PE and CR0.PG to be 1 in VMX operation (see Section
22.8). This restriction implies that guest software cannot be run in unpaged protected mode or in real-address
mode. Later processors support a VM-execution control called “unrestricted guest”.1 If this control is 1, CR0.PE and
CR0.PG may be 0 in VMX non-root operation.
https://scrapbox.io/files/6102d721f67c7a001f69e101.png
Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 3C: System Programming Guide, Part 3 >
参考文献
Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 3C: System Programming Guide, Part 3