CONFIG_ARM64_ERRATUM_2064142 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
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
In linux kernel since version 5.2 (release Date: 2019-07-07)
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.
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.