DBGAUTHSTATUS_EL1 Debug Authentication Status Register when FEAT_AA64 is implemented DBGAUTHSTATUS Architectural AArch32 31 0 31 0 31 0 31 0 DBGAUTHSTATUS_EL1 Architectural External 31 0 31 0 31 0 31 0 Provides information about the state of the IMPLEMENTATION DEFINED authentication interface for debug. Debug DBGAUTHSTATUS_EL1 is a 64-bit register. 63 28 63:28 Reserved, RES0. RTNID 27 26 27:26 Root non-invasive debug. This field has the same value as DBGAUTHSTATUS_EL1.RTID. RTID 25 24 25:24 Root invasive debug. All other values are reserved. If FEAT_RME is not implemented, the only permitted value is 0b00. 0b00 Not implemented. 0b10 Implemented and disabled. ExternalRootInvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalRootInvasiveDebugEnabled() == TRUE. 23 16 23:16 Reserved, RES0. RLNID 15 14 15:14 Realm non-invasive debug. This field has the same value as DBGAUTHSTATUS_EL1.RLID. RLID 13 12 13:12 Realm invasive debug. All other values are reserved. If FEAT_RME is not implemented, the only permitted value is 0b00. 0b00 Not implemented. 0b10 Implemented and disabled. ExternalRealmInvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalRealmInvasiveDebugEnabled() == TRUE. 11 8 11:8 Reserved, RES0. SNID 7 6 1:0 Secure non-invasive debug. This field has the same value as DBGAUTHSTATUS_EL1.SID. When FEAT_Debugv8p4 is implemented SNID 7 6 1:0 Secure non-invasive debug. All other values are reserved. 0b00 Secure state is not implemented. 0b10 Implemented and disabled. ExternalSecureNoninvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalSecureNoninvasiveDebugEnabled() == TRUE. Otherwise SID 5 4 5:4 Secure invasive debug. All other values are reserved. 0b00 Secure state is not implemented. 0b10 Implemented and disabled. ExternalSecureInvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalSecureInvasiveDebugEnabled() == TRUE. NSNID 3 2 1:0 Non-secure non-invasive debug. All other values are reserved. 0b00 Non-secure state is not implemented. 0b11 Implemented and enabled. EL3 is implemented or the Effective value of SCR_EL3.NS is 1. When FEAT_Debugv8p4 is implemented NSNID 3 2 1:0 Non-secure non-invasive debug. All other values are reserved. 0b00 Non-secure state is not implemented. 0b10 Implemented and disabled. ExternalNoninvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalNoninvasiveDebugEnabled() == TRUE. Otherwise NSID 1 0 1:0 Non-secure invasive debug. All other values are reserved. 0b00 Non-secure state is not implemented. 0b10 Implemented and disabled. ExternalInvasiveDebugEnabled() == FALSE. 0b11 Implemented and enabled. ExternalInvasiveDebugEnabled() == TRUE. MRS <Xt>, DBGAUTHSTATUS_EL1 if !IsFeatureImplemented(FEAT_AA64) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().TDA == '1' then Undefined(); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HDFGRTR_EL2().DBGAUTHSTATUS_EL1 == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2().[TDE,TDA] != '00' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3().TDA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = DBGAUTHSTATUS_EL1(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3().TDA == '1' then Undefined(); elsif HaveEL(EL3) && MDCR_EL3().TDA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = DBGAUTHSTATUS_EL1(); end; elsif PSTATE.EL == EL3 then X{64}(t) = DBGAUTHSTATUS_EL1(); end; 2026-03-26 20:27:25 2026-03_rel