kernelconfig_penguin
CONFIG_ARM64_ERRATUM_2064142 is not available for the default architecture x86.
Result is shown for architecture arm64
depends
CONFIG_CORESIGHT_TRBE

Cortex-A510: 2064142: workaround TRBE register writes while disabled

configname: CONFIG_ARM64_ERRATUM_2064142

Linux Kernel Configuration
└─> Kernel Features
└─> ARM errata workarounds via the alternatives framework
└─> Cortex-A510: 2064142: workaround TRBE register writes while disabled

This option adds the workaround for ARM Cortex-A510 erratum 2064142.

Affected Cortex-A510 core might fail to write into system registers after the
TRBE has been disabled. Under some conditions after the TRBE has been disabled
writes into TRBE registers TRBLIMITR_EL1, TRBPTR_EL1, TRBBASER_EL1, TRBSR_EL1,
and TRBTRG_EL1 will be ignored and will not be effected.

Work around this in the driver by executing TSB CSYNC and DSB after collection
is stopped and before performing a system register write to one of the affected
registers.

If unsure, say Y.