[DNM][WiP][PoC] userspace LL scheduling: LLEXT & multicore

app/overlays/ptl/ll_userspace_overlay.conf

@@ -24,15 +24,12 @@ CONFIG_COLD_STORE_EXECUTE_DEBUG=n
 CONFIG_SOF_TELEMETRY_PERFORMANCE_MEASUREMENTS=n
 CONFIG_SOF_TELEMETRY_IO_PERFORMANCE_MEASUREMENTS=n
 
-# disable loadable modules (hits privilege issues in user-space now)
-CONFIG_LLEXT_STORAGE_WRITABLE=n
-CONFIG_LLEXT_EXPERIMENTAL=n
-CONFIG_MODULES=n
-
 # some of current boot tests interfere with user-space setup
 CONFIG_SOF_BOOT_TEST_ALLOWED=n
 
 # misc features not yet compatible with user-space
 CONFIG_CROSS_CORE_STREAM=n
 CONFIG_INTEL_ADSP_MIC_PRIVACY=n
 CONFIG_XRUN_NOTIFICATIONS_ENABLE=n
+
+CONFIG_MAX_THREAD_BYTES=4

posix/include/rtos/mutex.h

@@ -62,4 +62,25 @@ static inline int sys_mutex_unlock(struct sys_mutex *mutex)
 	return 0;
 }
 
+/* provide a no-op implementation for zephyr/sys/sem.h */
+
+struct sys_sem {
+};
+
+static inline int sys_sem_init(struct sys_sem *sem, unsigned int initial_count,
+			       unsigned int limit)
+{
+	return 0;
+}
+
+static inline int sys_sem_give(struct sys_sem *sem)
+{
+	return 0;
+}
+
+static inline int sys_sem_take(struct sys_sem *sem, k_timeout_t timeout)
+{
+	return 0;
+}
+
 #endif

src/audio/buffers/comp_buffer.c

@@ -11,6 +11,7 @@
 #include <sof/audio/sink_api.h>
 #include <sof/audio/source_api.h>
 #include <sof/audio/sink_source_utils.h>
+#include <sof/audio/module_adapter/module/generic.h>
 #include <rtos/userspace_helper.h>
 #include <sof/common.h>
 #include <rtos/interrupt.h>
@@ -165,8 +166,7 @@ static void comp_buffer_free(struct sof_audio_buffer *audio_buffer)
 
 	if (alloc && alloc->vreg) {
 		vregion_free(alloc->vreg, buffer);
-		if (!vregion_put(alloc->vreg))
-			rfree(alloc);
+		module_adapter_vreg_free(alloc);
 	} else {
 		sof_heap_free(alloc ? alloc->heap : NULL, buffer);
 	}