TRCCIDCCTLR1 Trace Context Identifier Comparator Control Register 1 when FEAT_ETE is implemented, FEAT_TRC_EXT is implemented, UInt(TRCIDR4.NUMCIDC) > 0x4, and UInt(TRCIDR2.CIDSIZE) > 0 ETE 0x684 TRCCIDCCTLR1 When OSLockStatus(), or !AllowExternalTraceAccess(addrdesc), or !IsTraceCorePowered() ERROR RW TRCCIDCCTLR1 Architectural AArch64 31 0 31 0 31 0 31 0 Contains Context identifier mask values for the TRCCIDCVR<n> registers, for n = 4 to 7. Trace TRCCIDCCTLR1 is a 32-bit register. COMP7[<m>] 31 24 7:0 TRCCIDCVR7 mask control. Specifies the mask value that the trace unit applies to TRCCIDCVR7. Each bit in this field corresponds to a byte in TRCCIDCVR7. 7 0 0b0 The trace unit includes TRCCIDCVR7[(m×8+7):(m×8)] when it performs the Context identifier comparison. 0b1 The trace unit ignores TRCCIDCVR7[(m×8+7):(m×8)] when it performs the Context identifier comparison. AU When m >= UInt(TRCIDR2.CIDSIZE) RES0 RW When UInt(TRCIDR4.NUMCIDC) > 7 31 24 31:24 Reserved, RES0. Otherwise COMP6[<m>] 23 16 7:0 TRCCIDCVR6 mask control. Specifies the mask value that the trace unit applies to TRCCIDCVR6. Each bit in this field corresponds to a byte in TRCCIDCVR6. 7 0 0b0 The trace unit includes TRCCIDCVR6[(m×8+7):(m×8)] when it performs the Context identifier comparison. 0b1 The trace unit ignores TRCCIDCVR6[(m×8+7):(m×8)] when it performs the Context identifier comparison. AU When m >= UInt(TRCIDR2.CIDSIZE) RES0 RW When UInt(TRCIDR4.NUMCIDC) > 6 23 16 23:16 Reserved, RES0. Otherwise COMP5[<m>] 15 8 7:0 TRCCIDCVR5 mask control. Specifies the mask value that the trace unit applies to TRCCIDCVR5. Each bit in this field corresponds to a byte in TRCCIDCVR5. 7 0 0b0 The trace unit includes TRCCIDCVR5[(m×8+7):(m×8)] when it performs the Context identifier comparison. 0b1 The trace unit ignores TRCCIDCVR5[(m×8+7):(m×8)] when it performs the Context identifier comparison. AU When m >= UInt(TRCIDR2.CIDSIZE) RES0 RW When UInt(TRCIDR4.NUMCIDC) > 5 15 8 15:8 Reserved, RES0. Otherwise COMP4[<m>] 7 0 7:0 TRCCIDCVR4 mask control. Specifies the mask value that the trace unit applies to TRCCIDCVR4. Each bit in this field corresponds to a byte in TRCCIDCVR4. 7 0 0b0 The trace unit includes TRCCIDCVR4[(m×8+7):(m×8)] when it performs the Context identifier comparison. 0b1 The trace unit ignores TRCCIDCVR4[(m×8+7):(m×8)] when it performs the Context identifier comparison. AU When m >= UInt(TRCIDR2.CIDSIZE) RES0 RW When UInt(TRCIDR4.NUMCIDC) > 4 7 0 7:0 Reserved, RES0. Otherwise If software uses the TRCCIDCVR<n> registers, for n = 4 to 7, then it must program this register. If software sets a mask bit to 1 then it must program the relevant byte in TRCCIDCVR<n> to 0x00. If any bit is 1 and the relevant byte in TRCCIDCVR<n> is not 0x00, the behavior of the Context Identifier Comparator is CONSTRAINED UNPREDICTABLE. In this scenario the comparator might match unexpectedly or might not match. Writes are CONSTRAINED UNPREDICTABLE if the trace unit is not in the Idle state. 2026-03-26 20:27:25 2026-03_rel