fix(aia): mstateen0.AIA shouldn't have effect on attempts in VS-mode to access sireg#6125
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fix(aia): mstateen0.AIA shouldn't have effect on attempts in VS-mode to access sireg#6125wissygh wants to merge 2 commits into
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Jun 24, 2026
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- The AIA bit controls access to AIA CSRs siph, sieh, stopi, hidelegh, hvien/hvienh, hviph, hvictl, hviprio1/hviprio1h, hviprio2/hviprio2h, vsiph, vsieh, and vstopi, as well as to the supervisor level interrupt priorities accessed through siselect + sireg (the iprio array of Section 5.4.1)
- mstateen0.AIA have no effect on attempts in VS-mode to access sireg when vsiselect has a value in the range 0x30-0x3F. So for {V=1, vsiselect ∈ 0x30–0x3F, CSRIND=1, AIA=0}, the conforming result is a virtual instruction exception.
…to access sireg
* The AIA bit controls access to AIA CSRs siph, sieh, stopi, hidelegh, hvien/hvienh, hviph, hvictl, hviprio1/hviprio1h, hviprio2/hviprio2h, vsiph, vsieh, and vstopi, as well as to the supervisor level interrupt priorities accessed through siselect + sireg (the iprio array of Section 5.4.1)
* mstateen0.AIA have no effect on attempts in VS-mode to access sireg when vsiselect has a value in the range 0x30-0x3F. So for {V=1, vsiselect ∈ 0x30–0x3F, CSRIND=1, AIA=0}, the conforming result is a virtual instruction exception.
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