Hi Steve,

On 06/03/2023 05:54, Steve Clevenger wrote:

Ampere ETMv4.x support. Added Ampere ETM ID, and changes required by the Ampere ETMv4.x hardware implementation.

I don't see any mention of the access via system instructions. Where did that end up ? What is the conclusion on that front ?

Kind regards Suzuki

Steve Clevenger (3): Add known list of Ampere ETMv4 errata coresight etm4x: Early clear TRCOSLAR.OSLK prior to TRCIDR1 read coresight etm4x: Add 32-bit read/write option to split 64-bit words

Documentation/arm64/silicon-errata.rst | 6 +- .../coresight/coresight-etm4x-core.c | 50 +++++++++++----- drivers/hwtracing/coresight/coresight-etm4x.h | 58 ++++++++++++++----- include/linux/coresight.h | 3 + 4 files changed, 89 insertions(+), 28 deletions(-)