TCR_EL2, Translation Control Register, EL2
The TCR_EL2 controls translation table walks required for stage 1 translation of a memory access from EL2 and holds cacheability and shareability information.
Bit field descriptions
TCR_EL2 is a 32-bit register.
TCR_EL2 is part of:
- The Virtual memory control registers functional group.
- The Hypervisor and virtualization registers functional group.
Figure B2-79 TCR_EL2 bit assignments
Bits[28:21], architecturally defined, are implemented in the core.
- HD, 
Dirty bit update. The possible values are:
Dirty bit update is disabled.
Dirty bit update is enabled.
- HA, 
Stage 1 Access flag update. The possible values are:
Stage 1 Access flag update is disabled.
Stage 1 Access flag update is enabled.
When the Virtualization Host Extension is activated, TCR_EL2 has the same bit assignments as TCR_EL1.
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.