[RFC][PATCH 00/10] Use global pages with PTI

Dave Hansen
2018-02-22T20:37:01Z

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@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kees Cook <keescook@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: x86@kernel.org
Cc: Nadav Amit <namit@vmware.com>