Issues

• [misa] Clearing U does not clear dependent S

  OSCPU/NutShell#276 · Filter by author kkapapu opened on Sep 5, 2026

• [mip] MTIP/MEIP is software-writable via CSR write, which is read-only

  OSCPU/NutShell#275 · Filter by author kkapapu opened on Sep 5, 2026

• [mie] USIE/UTIE/UEIE are writable although N is not implemented

  OSCPU/NutShell#272 · Filter by author kkapapu opened on Aug 29, 2026

• [amoxor.w] rd gets the AMO result instead of the original memory value

  OSCPU/NutShell#271 · Filter by author kkapapu opened on Aug 29, 2026

• Accessing pmpcfg1 on RV64 is not an illegal instruction

  OSCPU/NutShell#270 · Filter by author kkapapu opened on Aug 29, 2026

• S-mode mret is executed instead of illegal-instruction

  OSCPU/NutShell#269 · Filter by author kkapapu opened on Aug 29, 2026

• [Sv39] Misaligned superpage (nonzero low PPN) does not raise a page fault

  OSCPU/NutShell#268 · Filter by author kkapapu opened on Aug 29, 2026

• Final-level Sv39 PTE with W=1,R=0 is accepted for store instead of raising store page fault

  OSCPU/NutShell#266 · Filter by author jf-cc727 opened on Jun 23, 2026

• Misaligned Sv39 1 GiB superpage leaf is accepted instead of raising load page fault

  OSCPU/NutShell#265 · Filter by author jf-cc727 opened on Jun 23, 2026

• PTW PTE-access faults are misreported as load page faults

  OSCPU/NutShell#264 · Filter by author jf-cc727 opened on Jun 23, 2026

• csrr minstret exposes a one-instruction-stale retired count

  OSCPU/NutShell#263 · Filter by author jf-cc727 opened on Jun 23, 2026

• Sv39-translated U-mode store to an inaccessible physical address retires without Store/AMO access fault

  OSCPU/NutShell#262 · Filter by author jf-cc727 opened on Jun 23, 2026

• mtvec readback retains upper BASE bits that are silently truncated on trap entry

  OSCPU/NutShell#261 · Filter by author jf-cc727 opened on Jun 23, 2026

• Explicit writes to minstret lose to the automatic retirement update

  OSCPU/NutShell#260 · Filter by author jf-cc727 opened on Jun 23, 2026

• Missing documentation for NOOP_HOME environment variable

  OSCPU/NutShell#256 · Filter by author zlh20040308 opened on Jan 6, 2026
  2

• TSR=1, SRET executed in S-mode does not raise an exception

  OSCPU/NutShell#254 · Filter by author fly-1011 opened on Dec 11, 2025

• TVM=1, SFENCE.VMA in S-mode does not raise an exception

  OSCPU/NutShell#253 · Filter by author fly-1011 opened on Dec 11, 2025
  1

• MRET/SRET Do Not Clear MPRV When Returning to a Less-Privileged Mode

  OSCPU/NutShell#252 · Filter by author fly-1011 opened on Dec 10, 2025

• Executing SRET in Lower-Privilege Mode Does Not Raise an Exception

  OSCPU/NutShell#251 · Filter by author fly-1011 opened on Dec 10, 2025

• Accessing satp in lower-privilege modes does not raise an exception

  OSCPU/NutShell#250 · Filter by author fly-1011 opened on Dec 10, 2025

• Executing wfi in U-mode does not raise an exception

  OSCPU/NutShell#249 · Filter by author fly-1011 opened on Dec 10, 2025

• Bits in the mip Register That Must Remain Zero Are Incorrectly Writable

  OSCPU/NutShell#248 · Filter by author fly-1011 opened on Dec 7, 2025

• mip.MSIP should not be writable

  OSCPU/NutShell#247 · Filter by author fly-1011 opened on Dec 7, 2025

• mie.LCOFIE is not implemented correctly

  OSCPU/NutShell#246 · Filter by author fly-1011 opened on Dec 7, 2025

• Incorrect minstret Count Increased by ECALL

  OSCPU/NutShell#245 · Filter by author fly-1011 opened on Dec 4, 2025