TRCITEEDCR Instrumentation Trace Extension External Debug Control Register when FEAT_ETE is implemented, FEAT_TRC_EXT is implemented, and FEAT_ITE is implemented ETE 0x048 TRCITEEDCR When OSLockStatus(), or !AllowExternalTraceAccess(addrdesc), or !IsTraceCorePowered() ERROR RW TRCITEEDCR Architectural AArch64 31 0 31 0 31 0 31 0 Controls instrumentation trace filtering. Trace TRCITEEDCR is a 32-bit register. 31 7 31:7 Reserved, RES0. RL 6 6 0 Instrumentation Trace in Realm state. This field is ignored when SelfHostedTraceEnabled() returns TRUE. This field is used in conjunction with TRCCONFIGR.ITO and TRCITEEDCR.E<m> to control whether Instrumentation trace is permitted or prohibited in Realm state. 0b0 Instrumentation trace prohibited in Realm state. 0b1 Instrumentation trace permitted in Realm state. AU When FEAT_RME is implemented 6 6 6 Reserved, RES0. Otherwise S 5 5 0 Instrumentation Trace in Secure state. This field is ignored when SelfHostedTraceEnabled() returns TRUE. When FEAT_RME is not implemented, this field is used in conjunction with TRCCONFIGR.ITO, TRCITEEDCR.E3, and TRCITEEDCR.E<m> to control whether Instrumentation trace is permitted or prohibited in Secure state. When FEAT_RME is implemented, this field is used in conjunction with TRCCONFIGR.ITO and TRCITEEDCR.E<m> to control whether Instrumentation trace is permitted or prohibited in Secure state. 0b0 Instrumentation trace prohibited in Secure state. 0b1 Instrumentation trace permitted in Secure state. AU When HaveSecureState() 5 5 5 Reserved, RES0. Otherwise NS 4 4 0 Instrumentation Trace in Non-secure state. This field is ignored when SelfHostedTraceEnabled() returns TRUE. This field is used in conjunction with TRCCONFIGR.ITO and TRCITEEDCR.E<m> to control whether Instrumentation trace is permitted or prohibited in Non-secure state. 0b0 Instrumentation trace prohibited in Non-secure state. 0b1 Instrumentation trace permitted in Non-secure state. AU When EL3 is implemented or NonSecureOnlyImplementation() 4 4 4 Reserved, RES0. Otherwise E3 3 3 0 Instrumentation Trace Enable at EL3. This field is ignored when SelfHostedTraceEnabled() returns TRUE. When FEAT_RME is not implemented, TRCITEEDCR.E3 is used in conjunction with TRCCONFIGR.ITO and TRCITEEDCR.S to control whether Instrumentation trace is permitted or prohibited at EL3. When FEAT_RME is implemented, TRCITEEDCR.E3 is used in conjunction with TRCCONFIGR.ITO to control whether Instrumentation trace is permitted or prohibited at EL3. 0b0 Instrumentation trace prohibited at EL3. 0b1 Instrumentation trace permitted at EL3. AU When EL3 is implemented 3 3 3 Reserved, RES0. Otherwise E<m> 2 0 2:0 Instrumentation Trace Enable at EL<m>. This field is ignored when SelfHostedTraceEnabled() returns TRUE. This bit is used in conjunction with TRCCONFIGR.ITO, TRCITEEDCR.NS, TRCITEEDCR.S, and TRCITEEDCR.RL to control whether Instrumentation trace is permitted or prohibited at EL<m> in the specified Security states. TRCITEEDCR.E<2> is RES0 if EL2 is not implemented in any Security states. 2 0 0b0 Instrumentation trace prohibited at EL<m>. 0b1 Instrumentation trace permitted at EL<m>. AU Writes are CONSTRAINED UNPREDICTABLE if the trace unit is not in the Idle state. 2026-03-26 20:27:25 2026-03_rel