Does long mode have all the privilege levels?

[optimisticnugget]

Since the segment descriptors in long mode are just ignored, does that mean that in long mode, there is only user and supervisor mode? Whereas in regular 32-bit protected mode, we have all the 4 rings?

[iansjack]

The Intel or AMD Programmer’s Manuals will tell you all you need to know.

[pvc]

Base and Limit fields are ignored. Everything else is still in use and works nearly the same as in 32 bit protected mode. The biggest difference is the TSS since there is no hardware task switching.