riscv: Mask unsupported menvcfg fields#33
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This was referenced Jul 6, 2026
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This patch prevents unsupported
menvcfgfields from being stored and read back as writable ones.The following fields are masked because their related functionality is not implemented by tlib:
STCE, related toSstcPBMTE, related toSvpbmtCDE, related toSmcdelegPMM, related toSmnpmCBZE, related toZicbozCBCFEandCBIE, related toZicbomThese fields are required to remain read-only zero when their related extensions are not implemented.
The patch also makes
menvcfghavailable only on RV32 and rejects access to both CSRs when U-mode is not supported.ADUEis intentionally not changed in this patch. TLib already performs automatic PTE A/D-bit updates, but this behavior is not currently controlled bymenvcfg.ADUE.Related to renode/renode#904