CONFIG_ARM64_ERRATUM_2139208 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64
Neoverse-N2: 2139208: workaround TRBE overwriting trace data in FILL mode
configname: CONFIG_ARM64_ERRATUM_2139208
Linux Kernel Configuration
└─>Kernel Features
└─>ARM errata workarounds via the alternatives framework
└─>Neoverse-N2: 2139208: workaround TRBE overwriting trace data in FILL mode
In linux kernel since version 5.2 (release Date: 2019-07-07)
This option adds the workaround for ARM Neoverse-N2 erratum 2139208.
Affected Neoverse-N2 cores could overwrite up to 3 cache lines of trace
data at the base of the buffer (pointed to by TRBASER_EL1) in FILL mode in
the event of a WRAP event.
Work around the issue by always making sure we move the TRBPTR_EL1 by
256 bytes before enabling the buffer and filling the first 256 bytes of
the buffer with ETM ignore packets upon disabling.
If unsure, say Y.
Affected Neoverse-N2 cores could overwrite up to 3 cache lines of trace
data at the base of the buffer (pointed to by TRBASER_EL1) in FILL mode in
the event of a WRAP event.
Work around the issue by always making sure we move the TRBPTR_EL1 by
256 bytes before enabling the buffer and filling the first 256 bytes of
the buffer with ETM ignore packets upon disabling.
If unsure, say Y.