ARM Cortex-A76 Core Technical Reference Manual page 265

TDA, [9]
Configurations
100798_0300_00_en
Trap accesses to the remaining sets of debug registers to EL3.
Accesses are not trapped.
0
Accesses to the remaining debug system registers are trapped to EL3.
1
The reset value is
UNKNOWN
There are no configuration notes.
Bit fields and details that are not provided in this description are architecturally defined. See the
Arm Architecture Reference Manual Armv8, for Armv8-A architecture profile.
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B2.83 MDCR_EL3, Monitor Debug Configuration Register, EL3
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reserved.
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B2 AArch64 system registers
B2-265