K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2019-11-10T09:28:18.366891Z
K 7
svn:log
V 349
amd64: move common_tss into pcpu.

This saves some memory, around 256K I think.  It removes some code,
e.g. KPTI does not need to specially map common_tss anymore.  Also,
common_tss become domain-local.

Reviewed by:	jhb
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D22231

END