[RFC][PATCH 00/10] Use global pages with PTI
From: Dave Hansen
Date: Thu Feb 22 2018 - 15:37:06 EST
The later verions of the KAISER pathces (pre-PTI) allowed the user/kernel
shared areas to be GLOBAL. The thought was that this would reduce the
TLB overhead of keeping two copies of these mappings.
During the switch over to PTI, we seem to have lost our ability to have
GLOBAL mappings. This adds them back.
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Nadav Amit <namit@xxxxxxxxxx>