Sv39 Extension
- Implemented Version
-
1.12.0
Versions
| Version 1.11.0 | |
|---|---|
State |
ratified |
Ratification date |
2019-05 |
| Version 1.12.0 | |
|---|---|
State |
ratified |
Ratification date |
2021-12 |
Ratification document |
https://github.com/riscv/riscv-isa-manual/releases/download/Priv-v1.12/riscv-privileged-20211203.pdf |
| Version 1.13.0 | |
|---|---|
State |
ratified |
Ratification date |
2024-10 |
Parameters
This extension has the following implementation options:
- TRAP_ON_SFENCE_VMA_WHEN_SATP_MODE_IS_READ_ONLY
-
For implementations that make satp.MODE read-only zero (always Bare, i.e., no virtual translation is implemented), attempts to execute an SFENCE.VMA instruction might raise an illegal-instruction exception.
TRAP_ON_SFENCE_VMA_WHEN_SATP_MODE_IS_READ_ONLY indicates whether or not that exception occurs.
TRAP_ON_SFENCE_VMA_WHEN_SATP_MODE_IS_READ_ONLY has no effect when some virtual translation mode is supported.