Null value (never used by the API).
Whether hardware virtualization (VT-x/AMD-V) is enabled at all. If
such extensions are not available, they will not be used.
Whether hardware virtualization is used exclusively by VirtualBox. When enabled,
VirtualBox assumes it can acquire full and exclusive access to the VT-x or AMD-V
feature of the host. To share these with other hypervisors, you must disable this property.
Whether VT-x VPID is enabled. If this extension is not available, it will not be used.
Whether Nested Paging is enabled. If this extension is not available, it will not be used.
Whether large page allocation is enabled; requires nested paging and a 64 bits host.
Whether the VM should fail to start if hardware virtualization (VT-x/AMD-V) cannot be used. If
not set, there will be an automatic fallback to software virtualization.