Update on Fast Interrupt Task Group (CLIC) Since Barcelona 2018
summary
Update summarizes concrete progress: 6 Proof-of-Concept CLIC implementations are public, CLIC replaces three CLINT CSRs with memory‑mapped registers and supports up to 4096 interrupts, adds per‑interrupt priorities, a next‑interrupt CSR to skip redundant context restore, and hardware support for interrupt preemption to reduce latency and back‑to‑back overhead; AIA/APLIC and PLIC are frozen and resumable non‑maskable interrupts (RNMI) are near ratification, with CLIC aiming for ratification soon.
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