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

app/overlays/ptl/ll_userspace_overlay.conf

@@ -17,22 +17,18 @@ CONFIG_DAI_USERSPACE=y
 
 # problem with DSP panics due to illegal instruction hit in user-space if cold
 # store execution is enabled. Disable it for now until rootcause is found.
-CONFIG_COLD_STORE_EXECUTE_DRAM=n
 CONFIG_COLD_STORE_EXECUTE_DEBUG=n
 
 # telemetry not yet user-space compatible
 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

scripts/llext_link_helper.py

@@ -144,8 +144,7 @@ def main():
 	# critical functions in a .cold ELF section, read-only data in a
 	# .coldrodata ELF section, etc. When compiling and linking such
 	# functions, an additional .cold.literal section is automatically
-	# created. Note, that for some reason the compiler also marks .cold as
-	# executable.
+	# created.
 	# This script links those sections at address 0. We could hard-code
 	# section names, but so far we choose to only link .text the "original"
 	# way and all other executable sections we link at 0. For data sections
@@ -168,6 +167,8 @@ def main():
 
 		dram_addr += section.header['sh_size']
 
+	dram_addr = align_up(dram_addr, 0x1000)
+
 	for section in readonly_dram:
 		s_alignment = section.header['sh_addralign']
 		s_name = section.name

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);
 	}