diff options
| author | Andrew Waterman <andrew@sifive.com> | 2019-03-07 21:46:10 -0800 |
|---|---|---|
| committer | Andrew Waterman <andrew@sifive.com> | 2019-03-07 21:46:10 -0800 |
| commit | 6542a199007260e921932e1e04d61176788ec83a (patch) | |
| tree | 381846d658fa749e12ca400df3179c6a06b8a1cc /src/priv-preface.tex | |
| parent | f3663bddccd838842154aed6db44d93dfc19d009 (diff) | |
| download | riscv-isa-manual-6542a199007260e921932e1e04d61176788ec83a.zip riscv-isa-manual-6542a199007260e921932e1e04d61176788ec83a.tar.gz riscv-isa-manual-6542a199007260e921932e1e04d61176788ec83a.tar.bz2 | |
Add software constraint for future global-ASID extension
Closes #348
Diffstat (limited to 'src/priv-preface.tex')
| -rw-r--r-- | src/priv-preface.tex | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/priv-preface.tex b/src/priv-preface.tex index 7df25b2..820e347 100644 --- a/src/priv-preface.tex +++ b/src/priv-preface.tex @@ -34,6 +34,10 @@ The changes in this version of the document include: required to, clear LR reservations if A extension present. \item The virtual-memory system no longer permits supervisor mode to execute instructions from user pages, regardless of the SUM setting. +\item Software is strongly recommended to allocate ASIDs globally, so that + a future extension can globalize ASIDs for improved performance and hardware + flexibility. +\item SFENCE.VMA semantics have been clarified. \item Made the {\tt mstatus}.MPP field \warl, rather than \wlrl. \item Made the unused {\em x}{\tt ip} fields \wpri, rather than \wiri. \item Made the unused {\tt misa} fields \wlrl, rather than \wiri. |