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Priv 1.12: PTW page fault instead of access exception if PTE reserved bit set #2913

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merged 2 commits into from
Jan 21, 2022

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@ingallsj ingallsj commented Dec 5, 2021

Related issue: resolves #2795
needs riscv-software-src/riscv-isa-sim#874 and riscv-software-src/riscv-isa-sim#875 to fully correctly match RTL behavior.

Type of change: feature request

Impact: API modification

Development Phase: proposal

Release Notes
PTE_RSVD was introduced into Spike in riscv-software-src/riscv-isa-sim#750
Reserved PTE bits report page fault instead of access exception.
Add an additional bit pf to PTWResp and TLBEntryData to pipe this through.

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Priv ISA v1.12: PTW report page fault instead of access fault if PTE reserved bit set
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