tree 5aa937f17bd6579d02cb046c34f812b1e41e5a18
parent f92ddfb7b5415536e4fe4c7a4868737954159374
author Guo Ren <guoren@linux.alibaba.com> 1608435567 +0000
committer Guo Ren <guoren@linux.alibaba.com> 1610416360 +0800

csky: Fixup barrier design

Remove shareable bit for ordering barrier, just keep ordering
in current hart is enough for SMP. Using three continuous
sync.is as PTW barrier to prevent speculative PTW in 860
microarchitecture.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>