optionally simplify lm_perm #387
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andresag01
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arichardson
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Oct 1, 2024
Co-authored-by: Alexander Richardson <[email protected]> Signed-off-by: Tariq Kurd <[email protected]>
andresag01
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LM permission adds 4 cases to RV32: output R output RC output original permissions output no permissions (reserved cases only) This note allows the implementation to propagate reserved permissions through ACPERM for improved timing in the design. The reserved permissions cannot be used for dereferencing, and so this does not cause a security problem. It's just an implementation defined note - no spec change (it's also ok to clear the permissions). --------- Signed-off-by: Tariq Kurd <[email protected]> Co-authored-by: Alexander Richardson <[email protected]>
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LM permission adds 4 cases to RV32:
output R
output RC
output original permissions
output no permissions (reserved cases only)
This note allows the implementation to propagate reserved permissions through ACPERM for improved timing in the design.
The reserved permissions cannot be used for dereferencing, and so this does not cause a security problem.
It's just an implementation defined note - no spec change (it's also ok to clear the permissions).