tree 7533fede94058fe12778d5910f908b3ac2eba524
parent 5ad9a23e6daef31c23895c5a0d8f0bc1fb4f69f6
author ShihPo Hung <shihpo.hung@sifive.com> 1560745577 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1561433760 +0800

riscv: mm: synchronize MMU after pte change

commit bf587caae305ae3b4393077fb22c98478ee55755 upstream.

Because RISC-V compliant implementations can cache invalid entries
in TLB, an SFENCE.VMA is necessary after changes to the page table.
This patch adds an SFENCE.vma for the vmalloc_fault path.

Signed-off-by: ShihPo Hung <shihpo.hung@sifive.com>
[paul.walmsley@sifive.com: reversed tab->whitespace conversion,
 wrapped comment lines]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: linux-riscv@lists.infradead.org
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>