This patchset adds support for CoreSight STM IP block. It also makes a little modification to the generic STM framework to cover the CoreSight STM requirements. Full description follows the changelog. Changes from v1: - Added a definition of coresight_simple_func() in CS-STM driver to avoid the kbuild test robot error for the time being. This modification will be removed when merging the code in which the coresight_simple_func() has been moved to the header file. - Calculate the channel number according to the channel memory space size. Changes from V2: - Changed to return -EFAULT if failed on the command STP_GET_OPTIONS. - Used Alex's patch [1] instead of the last 2/6. - Removed the while loop from stm_send(), since the packet size passed to it isn't larger than 4 bytes on 32-bit system and 8 bytes on 64-bit system. - Removed stm_send_64bit(), since the process of packets on 64-bit CS-STM should be basically the same with on 32-bit system, except the maximum length of writing STM at a time. - Removed the support of writing 64-bit to CoreSight STM buffer at a time on 32-bit ARM architecture according to an ARM engineer suggestion. As he said that the STM might receive a 64-bit write, or might receive a pair of 32-bit writes to the two addressed words in either order. So 64-bit write isn't guaranteed to work on the ARM 32-bit architecture. Thanks, Chunyan [1] https://lkml.org/lkml/2016/2/4/652 Alexander Shishkin (1): stm class: Support devices with multiple instances Chunyan Zhang (2): stm class: Add ioctl get_options interface Documentations: Add explanations of the case for non-configurable masters Mathieu Poirier (2): stm class: provision for statically assigned masterIDs coresight-stm: Bindings for System Trace Macrocell Pratik Patel (1): coresight-stm: adding driver for CoreSight STM component .../ABI/testing/sysfs-bus-coresight-devices-stm | 53 ++ .../devicetree/bindings/arm/coresight.txt | 28 + Documentation/trace/coresight.txt | 37 +- Documentation/trace/stm.txt | 6 + drivers/hwtracing/coresight/Kconfig | 11 + drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-stm.c | 928 +++++++++++++++++++++ drivers/hwtracing/stm/core.c | 30 +- drivers/hwtracing/stm/policy.c | 25 +- include/linux/coresight-stm.h | 6 + include/linux/stm.h | 11 + include/uapi/linux/coresight-stm.h | 12 + include/uapi/linux/stm.h | 1 + 13 files changed, 1140 insertions(+), 9 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-stm create mode 100644 drivers/hwtracing/coresight/coresight-stm.c create mode 100644 include/linux/coresight-stm.h create mode 100644 include/uapi/linux/coresight-stm.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
