RISC-V Design · All levels
PMP and Physical Memory Protection Domains: Silicon PPA Impact
Silicon PPA Impact for PMP and Physical Memory Protection Domains.
Silicon PPA impact
Silicon PPA Impact for PMP and Physical Memory Protection Domains is anchored on Unauthorized-access block rate, PMP rule evaluation latency, and coverage of privilege-domain isolation tests.. Convert observations into mechanism-backed decisions with explicit ownership.
Frequency gains that increase bubbles may lose net throughput.
Area growth from extension logic must justify workload value.
Power and thermal stability are release gates, not secondary metrics.
PPA trend view
diagram
BEFORE / AFTER TREND - PMP and Physical Memory Protection Domains
Unauthorized-access block rate, PMP rule evaluation latency, and coverage of privilege-domain isolation tests.
^
| o target band
| o after fix + reruns
| o
| o baseline (failing)
+--------------------------------------------------> iteration
capture issue isolate mechanism close + monitor
Use this view to confirm the gain is causal and stable across seeds.