This commit introduces tracepoint support to smp2p module, enabling logging of communication events between local and remote processors. The tracepoints capture essential details such as remote processor ID, subsystem names, negotiation specifics, supported features, bit changes, and subsystem restart (SSR) activity. These tracepoints enhance debugging capabilities for inter-subsystem issues. Addressing feedback from v1 to map remote PID (Process ID) along with the remote name in tracepoints added new patch in V2 1/2, adding support to include the remote name in the smp2p irq devname which fetches remote name from respective smp2p dtsi node, which also makes the wakeup source distinguishable in irq wakeup prints. Changes in v2: - Added support to include the remote name in the smp2p IRQ devname, allowing for remote PID-name mapping - Mapped the remote PID (Process ID) along with the remote name in tracepoints, as suggested by Chris - Modified to capture all `out->features` instead of just the `ssr_ack`, following Chris's recommendation - Expanded the commit description to provide additional context - Link to v1: https://lore.kernel.org/all/20240429075528.1723133-1-quic_sudeepgo@xxxxxxxxxxx Sudeepgoud Patil (2): soc: qcom: smp2p: Add remote name into smp2p irq devname soc: qcom: smp2p: Introduce tracepoint support drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/smp2p.c | 26 +++++++- drivers/soc/qcom/trace-smp2p.h | 116 +++++++++++++++++++++++++++++++++ 3 files changed, 142 insertions(+), 1 deletion(-) create mode 100644 drivers/soc/qcom/trace-smp2p.h --
