SBI V3.0: Fueling the Next Wave of RISC-V System Software Innovation
summary
SBI v3.0 specifies concrete extensions: SSE preemptive events that inject RAS notifications and PMU-overflow samples even with interrupts disabled, MPXY message proxy (RPMI over shared memory) that forwards kernel requests to platform controllers or remote MCUs, a firmware-feature interface for per-CPU and global rollouts, and a debug-trigger API for hardware break/watch points. OpenSBI 1.7 implements the spec, Linux patches (merged around 6.17) and KVM unit tests are landing, and prototypes demonstrate the features working end-to-end.
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