kernelconfig_penguin
CONFIG_ARM64_ERRATUM_2139208 is not available for the default architecture x86.
Result is shown for architecture arm64

depends
CONFIG_CORESIGHT_TRBE

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

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.