debug: debug_stream_thread_info: Thread info records over debug stream

Implementation for collecting Thread stack and CPU usage statistic from
Zephyr core and send the info and debug_stream records. The records
encoding is defined and documented in debug_stream_thread_info.c
source file.

Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>

src/debug/debug_stream/CMakeLists.txt

@@ -1,3 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 add_local_sources_ifdef(CONFIG_SOF_DEBUG_STREAM_SLOT sof debug_stream_slot.c)
+
+add_local_sources_ifdef(CONFIG_SOF_DEBUG_STREAM_THREAD_INFO sof debug_stream_thread_info.c)

src/debug/debug_stream/Kconfig

@@ -22,5 +22,26 @@ config SOF_DEBUG_STREAM_SLOT_NUMBER
  used for descriptors, so for slot 3 to be mapped, the WIN_2_SIZE
  must be (1 + 3) * 4k = 16k or greater.
 
-endif
+config SOF_DEBUG_STREAM_THREAD_INFO
+ bool "Enable Zephyr thread info reporting through Debug-Stream"
+ select INIT_STACKS
+ select THREAD_MONITOR
+ select THREAD_STACK_INFO
+ select THREAD_RUNTIME_STATS
+ help
+ This activates Zephyr thread info reporting through
+ Debug-Stream. Thread info reports some basic live data from
+ the Zephyr threads, like stack usage high-water-mark and CPU
+ usage. Please select THREAD_NAME=y for the thread names more
+ than just hex numbers.
 
+config SOF_DEBUG_STREAM_THREAD_INFO_INTERVAL
+ int "Thread information collection interval in seconds"
+ depends on SOF_DEBUG_STREAM_THREAD_INFO
+ default 2
+ range 1 10
+ help
+ Decides how often thread info runs and checks execution cycle
+ statistics and stack usage.
+
+endif