Hi,

This set is looking good now and appears to be getting close to being ready.

There are a few minor issues in the second patch and a few items that need to be confirmed. 1) I note that you removed the code to prevent calling claim/disclaim. Does this mean that you confirm that you have tested the patch update for claim tags I posted works on your system? 2) In patch 2 I made some comments in regard to ARCH values - please confirm that these are accurate and have been tested as working on your system 3) As mentioned in the comments to patch 2 - you need to update the docs for the new sysfs selection file you have added

Thanks and Regards

Mike

On Mon, 20 Oct 2025 at 08:12, Yingchao Deng yingchao.deng@oss.qualcomm.com wrote:

The QCOM extended CTI is a heavily parameterized version of ARM’s CSCTI. It allows a debugger to send to trigger events to a processor or to send a trigger event to one or more processors when a trigger event occurs on another processor on the same SoC, or even between SoCs.

QCOM extended CTI supports up to 128 triggers. And some of the register offsets are changed.

The commands to configure CTI triggers are the same as ARM's CTI.

Changes in v5:

1. Move common part in qcom-cti.h to coresight-cti.h.
2. Convert trigger usage fields to dynamic bitmaps and arrays.
3. Fix holes in struct cti_config to save some space.
4. Revert the previous changes related to the claim tag in cti_enable/disable_hw.

Link to v4 - https://lore.kernel.org/linux-arm-msm/20250902-extended_cti-v4-1-7677de04b41...

Changes in v4:

1. Read the DEVARCH registers to identify Qualcomm CTI.
2. Add a reg_idx node, and refactor the coresight_cti_reg_show() and

coresight_cti_reg_store() functions accordingly. 3. The register offsets specific to Qualcomm CTI are moved to qcom_cti.h. Link to v3 - https://lore.kernel.org/linux-arm-msm/20250722081405.2947294-1-quic_jinlmao@...

Changes in v3:

1. Rename is_extended_cti() to of_is_extended_cti().
2. Add the missing 'i' when write the CTI trigger registers.
3. Convert the multi-line output in sysfs to single line.
4. Initialize offset arrays using designated initializer.

Link to V2 - https://lore.kernel.org/all/20250429071841.1158315-3-quic_jinlmao@quicinc.co...

Changes in V2:

1. Add enum for compatible items.
2. Move offset arrays to coresight-cti-core

Signed-off-by: Jinlong Mao jinlong.mao@oss.qualcomm.com Signed-off-by: Yingchao Deng yingchao.deng@oss.qualcomm.com

---

Yingchao Deng (2): coresight: cti: Convert trigger usage fields to dynamic bitmaps and arrays coresight: cti: Add Qualcomm extended CTI support

drivers/hwtracing/coresight/coresight-cti-core.c | 144 +++++++++++++--- .../hwtracing/coresight/coresight-cti-platform.c | 16 +- drivers/hwtracing/coresight/coresight-cti-sysfs.c | 184 +++++++++++++++------ drivers/hwtracing/coresight/coresight-cti.h | 60 ++++++- drivers/hwtracing/coresight/qcom-cti.h | 29 ++++ 5 files changed, 346 insertions(+), 87 deletions(-)

---

base-commit: 1fdbb3ff1233e204e26f9f6821ae9c125a055229 change-id: 20251016-extended_cti-2a426c8894b1

Best regards,

Yingchao Deng yingchao.deng@oss.qualcomm.com