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Teach Sstc to respect xenvcfg.STCE #1591

Merged
merged 1 commit into from
Feb 8, 2024
Merged

Teach Sstc to respect xenvcfg.STCE #1591

merged 1 commit into from
Feb 8, 2024

Commits on Feb 6, 2024

  1. Teach Sstc to respect xenvcfg.STCE 

    When menvcfg.STCE=0, mip.STIP reverts to its defined behavior as if
unsupporting Sstc extension. When henvcfg.STCE=0, mip.VSTIP reverts
to its defined behavior as if unsupporting Sstc extension. [riscvarchive/riscv-time-compare#5]

The previous Sstc implementation does not respect the xenvcfg.STCE.
In other words, the Sstc may assert mip.STIP (mip.VSTIP) when
menvcfg.STCE=0 (henvcfg.STCE=0), which is a misbehaving.
    @YenHaoChen
    YenHaoChen committed Feb 6, 2024
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