Page Table Walk

Concept

A page table walk is identified in the evidence as a RISC-V processor verification target that can be difficult to fully exercise with random stimulus alone. The cited material specifically mentions page table walks in the context of privilege and memory-management testing, Sv39/Sv48 coverage gaps, STING-discovered deadlocks, and ImperasTS-MMU directed suites.

First seen 5/25/2026

Last seen 5/26/2026

Evidence 2 chunks

Wiki v1

WIKI

Overview

In the cited RISC-V verification material, page table walks are presented as a verification-relevant processor feature that may not be fully exercised by random test generation alone.[C1] They are discussed alongside other difficult-to-cover areas such as privilege-mode transitions and memory protection.[C1]

Verification significance

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NEIGHBORHOOD

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RELATIONSHIPS

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MMU part of → 91% 2e

Page table walks are a core mechanism within the MMU for address translation.

STING ← evaluates 93% 1e

STING has exposed deadlocks in page-table walks.

ImperasTS-MMU ← evaluates 94% 1e

ImperasTS-MMU tests exposed a subtle ordering issue in TLB flush logic after revealing weak points in page table walks.

LINKED ENTITIES

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ImperasTS-MMU TARGETS Extracted graph relationship

CITATIONS

6 sources

6 citations — click to expand

[1] Page table walks are cited as RISC-V ISA features that may not be fully exercised by random generation alone. source

[2] The cited verification approach combines constrained-random testing for breadth with directed suites for precision and coverage closure. source

[3] STING exposed issues including deadlocks in page-table walks. source

[4] Coverage analysis revealed weak points in Sv39 and Sv48 page table walks, and adding TS-MMU tests exposed a subtle ordering issue in TLB flush logic. source

[5] ImperasTS-MMU, together with PMP and ePMP suites, is described as a directed suite for virtual memory and protection features. source

[6] A hybrid flow can start with constrained-random sweeps using STING, use functional coverage analysis, and then close gaps with targeted directed tests. source