arch-x86: Ensure moving to %cs faults even in real mode.

It's always illegal to try to use the "mov" instruction to move a
selector into %cs. That was implemented for normal mov-s, but not for
the real mode version.

Change-Id: Ida8ec323fd7428ece583ad01cd5095d5f9630c9d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55825
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed