test: add a user-space test for PTL

PTL supports user-space, add a boot test for it.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

zephyr/test/CMakeLists.txt

@@ -3,3 +3,9 @@ if (CONFIG_SOF_BOOT_TEST)
                vmh.c
        )
 endif()
+
+if (CONFIG_ACE_VERSION_3_0)
+	zephyr_library_sources_ifdef(CONFIG_SOF_BOOT_TEST
+		userspace/ksem.c
+	)
+endif()

zephyr/test/userspace/ksem.c

@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright(c) 2025 Intel Corporation.
+ */
+
+#include <sof/boot_test.h>
+
+#include <zephyr/kernel.h>
+#include <zephyr/ztest.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_DECLARE(sof_boot_test, LOG_LEVEL_DBG);
+
+#define USER_STACKSIZE	2048
+
+static struct k_thread user_thread;
+static K_THREAD_STACK_DEFINE(user_stack, USER_STACKSIZE);
+K_SEM_DEFINE(user_sem, 0, 1);
+
+static void user_function(void *p1, void *p2, void *p3)
+{
+	__ASSERT(k_is_user_context(), "isn't user");
+	LOG_INF("SOF thread %s (%s)",
+	       k_is_user_context() ? "UserSpace!" : "privileged mode.",
+	       CONFIG_BOARD_TARGET);
+}
+
+static void user_sem_function(void *p1, void *p2, void *p3)
+{
+	__ASSERT(k_is_user_context(), "isn't user");
+	LOG_INF("SOF thread %s (%s)",
+	       k_is_user_context() ? "UserSpace!" : "privileged mode.",
+	       CONFIG_BOARD_TARGET);
+	k_sem_give(&user_sem);
+}
+
+static void test_user_thread(void)
+{
+	k_thread_create(&user_thread, user_stack, USER_STACKSIZE,
+			user_function, NULL, NULL, NULL,
+			-1, K_USER, K_MSEC(0));
+	k_thread_join(&user_thread, K_FOREVER);
+}
+
+static void test_user_thread_with_sem(void)
+{
+	/* Start in 10ms to have time to grant the thread access to the semaphore */
+	k_thread_create(&user_thread, user_stack, USER_STACKSIZE,
+			user_sem_function, NULL, NULL, NULL,
+			-1, K_USER, K_MSEC(10));
+	k_thread_access_grant(&user_thread, &user_sem);
+	k_sem_take(&user_sem, K_FOREVER);
+	k_thread_join(&user_thread, K_FOREVER);
+}
+
+ZTEST(sof_boot, user_space)
+{
+	test_user_thread();
+	test_user_thread_with_sem();
+
+	ztest_test_pass();
+}