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When ARMv8.3-PAuth is implemented: Controls the use of the top byte of instruction addresses for address matching. 0 TCR_EL1.TBI1 applies to Instruction and Data accesses. 1 TCR_EL1.TBI1 applies to Data accesses only. This affects addresses where the address would be translated by tables pointed to by TTBR1_EL1. This field resets to an architecturally UNKNOWN value. Otherwise: Reserved, RES0.
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When ARMv8.3-PAuth is implemented: Controls the use of the top byte of instruction addresses for address matching. 0 TCR_EL1.TBI1 applies to Instruction and Data accesses. 1 TCR_EL1.TBI1 applies to Data accesses only. This affects addresses where the address would be translated by tables pointed to by TTBR1_EL1. This field resets to an architecturally UNKNOWN value. Otherwise: Reserved, RES0.