Lightning Talk: What in RISC-V IOPMP

on YouTube ↗10m

" summary

IOPMP defines access control for non‑RISC‑V bus masters (DMA, NICs) by mapping source IDs to memory domains (MDID) and checking permissions via a searchable entry array. The proposal specifies a row/column MDID split (higher r bits select a row, lower c bits build a column mask), row buffers of two to c entries, and an address match engine that finds matches within two to three entries and iterates per domain (not per array size). Multiple profiles (full/4‑profile, replica, compact K, isolation) trade cost, latency and throughput; remaining work covers IOPMP protection, register spec and distributed designs.

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" chapters (11)

1. 0:00Introduction
2. 0:17Outline
3. 0:51Why IOPMP
4. 1:38Proposal
5. 2:23Memory Domain
6. 3:31Profiles
7. 4:41Top Register
8. 6:00Address Major
9. 7:23Pipeline
10. 8:17Profile
11. 9:05Conclusion

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