CVSROOT: /cvs
Module name: src
Changes by: kette...@cvs.openbsd.org 2021/08/02 13:07:29
Modified files:
sys/arch/riscv64/riscv64: pmap.c
Log message:
Add memory barrier (data FENCE) before making the SBI call to issue a
FENCE.I instruction on the remote harts. According to the RISC-V
ISA documentation this is necessary to make remote harts observe earlier
stores. Also issue the local FENCE.I first; this is what both FreeBSD and
Linux does. Seems to fix at least some of the issue we've seen running
GENERIC.MP on MP machines.
ok jca@
