mem: add initialization of virt memory region for loadable modules

This commit adds initialization of virtual memory region dedicated
for loadable modules.
This ensures no overlapping with other memory regions

possible extension: check when a module is being loaded if it fits
into the region

Signed-off-by: Marcin Szkudlinski <marcin.szkudlinski@intel.com>

Author: marcinszkudlinski

app/boards/intel_adsp_ace15_mtpm.conf

@@ -83,6 +83,7 @@ CONFIG_WATCHDOG=y
 CONFIG_TIMESLICE_PER_THREAD=y
 CONFIG_THREAD_RUNTIME_STATS=y
 CONFIG_SCHED_THREAD_USAGE=y
+CONFIG_MM_DRV_INTEL_VIRTUAL_REGION_COUNT=2
 
 # Zephyr / device drivers
 CONFIG_CLOCK_CONTROL=y

app/boards/intel_adsp_ace20_lnl.conf

@@ -63,6 +63,7 @@ CONFIG_LLEXT_STORAGE_WRITABLE=y
 CONFIG_LLEXT_EXPERIMENTAL=y
 CONFIG_MODULES=y
 CONFIG_TIMING_FUNCTIONS=y
+CONFIG_MM_DRV_INTEL_VIRTUAL_REGION_COUNT=2
 
 # Zephyr / device drivers
 CONFIG_CLOCK_CONTROL=y

app/boards/intel_adsp_ace30_ptl.conf

@@ -63,6 +63,7 @@ CONFIG_LLEXT=y
 CONFIG_LLEXT_STORAGE_WRITABLE=y
 CONFIG_LLEXT_EXPERIMENTAL=y
 CONFIG_MODULES=y
+CONFIG_MM_DRV_INTEL_VIRTUAL_REGION_COUNT=2
 
 # Zephyr / device drivers
 CONFIG_CLOCK_CONTROL=y

app/boards/intel_adsp_ace30_wcl.conf

@@ -50,6 +50,7 @@ CONFIG_LLEXT=y
 CONFIG_LLEXT_STORAGE_WRITABLE=y
 CONFIG_LLEXT_EXPERIMENTAL=y
 CONFIG_MODULES=y
+CONFIG_MM_DRV_INTEL_VIRTUAL_REGION_COUNT=2
 
 # Zephyr / device drivers
 CONFIG_CLOCK_CONTROL=y

src/library_manager/Kconfig

@@ -58,4 +58,10 @@ config LIBRARY_BASE_ADDRESS
 	  automatically but the beginning of that area is platform-specific and
 	  should be set by this option.
 
+config LIBRARY_REGION_SIZE
+	hex "Base address for memory, dedicated to loadable modules"
+	default 0x100000
+	help
+	  Size of the virtual memory region dedicated for loadable modules
+
 endmenu

src/library_manager/llext_manager_dram.c

@@ -5,12 +5,14 @@
 #include <rtos/alloc.h>
 
 #include <sof/lib_manager.h>
+#include <sof/lib/regions_mm.h>
 #include <ipc/topology.h>
 
 #include <zephyr/llext/buf_loader.h>
 #include <zephyr/llext/llext.h>
 #include <zephyr/llext/llext_internal.h>
 #include <zephyr/logging/log_ctrl.h>
+#include <adsp_memory_regions.h>
 
 LOG_MODULE_DECLARE(lib_manager, CONFIG_SOF_LOG_LEVEL);
 
@@ -331,3 +333,18 @@ int llext_manager_restore_from_dram(void)
 
 	return -ENOMEM;
 }
+
+static int llext_memory_region_init(void)
+{
+	int ret;
+
+	/* add a region for loadable libraries */
+	ret = adsp_add_virtual_memory_region(CONFIG_LIBRARY_BASE_ADDRESS,
+					     CONFIG_LIBRARY_REGION_SIZE,
+					     VIRTUAL_REGION_LOADABLE_LIBRARIES_ATTR);
+
+	return ret;
+}
+
+
+SYS_INIT(llext_memory_region_init, POST_KERNEL, 1);

zephyr/include/sof/lib/regions_mm.h

@@ -18,7 +18,8 @@
 #include <zephyr/sys/mem_blocks.h>
 
 /* Attributes for memory regions */
-#define VIRTUAL_REGION_SHARED_HEAP_ATTR 1U	/*< region dedicated for shared virtual heap */
+#define VIRTUAL_REGION_SHARED_HEAP_ATTR 1U	  /*< region dedicated for shared virtual heap */
+#define VIRTUAL_REGION_LOADABLE_LIBRARIES_ATTR 2U /*< region dedicated for loadable libraries */
 
 /* Dependency on ipc/topology.h created due to memory capability definitions
  * that are defined there