tftf/tests/runtime_services/secure_service/test_ffa_notifications.c

/*
 * Copyright (c) 2021-2022, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <debug.h>
#include <irq.h>
#include <smccc.h>

#include <arch_helpers.h>
#include <cactus_test_cmds.h>
#include <ffa_endpoints.h>
#include <ffa_svc.h>
#include <platform.h>
#include <spm_common.h>
#include <spm_test_helpers.h>
#include <test_helpers.h>

/**
 * Defining variables to test the per-vCPU notifications.
 * The conceived test follows the same logic, despite the sender receiver type
 * of endpoint (VM or secure partition).
 * Using global variables because these need to be accessed in the cpu on handler
 * function 'request_notification_get_per_vcpu_on_handler'.
 * In each specific test function, change 'per_vcpu_receiver' and
 * 'per_vcpu_sender' have the logic work for:
 * - NWd to SP;
 * - SP to NWd;
 * - SP to SP.
 */
static ffa_id_t per_vcpu_receiver;
static ffa_id_t per_vcpu_sender;
uint32_t per_vcpu_flags_get;
static event_t per_vcpu_finished[PLATFORM_CORE_COUNT];

static const struct ffa_uuid expected_sp_uuids[] = {
		{PRIMARY_UUID}, {SECONDARY_UUID}, {TERTIARY_UUID}
};

static ffa_notification_bitmap_t g_notifications = FFA_NOTIFICATION(0)  |
						   FFA_NOTIFICATION(1)  |
						   FFA_NOTIFICATION(30) |
						   FFA_NOTIFICATION(50) |
						   FFA_NOTIFICATION(63);

/**
 * Use FFA_FEATURES to retrieve the ID of:
 * - Schedule Receiver Interrupt
 * - Notification Pending Interrupt
 * - Managed Exit Interrupt
 * Validate the call works as expected, and they match the used int ID in the
 * remainder of the tests.
 */
test_result_t test_notifications_retrieve_int_ids(void)
{
	struct ffa_value ret;

	SKIP_TEST_IF_FFA_VERSION_LESS_THAN(1, 1);

	/* Check if SPMC is OP-TEE at S-EL1 */
	if (check_spmc_execution_level()) {
		/* FFA_FEATURES is not yet supported in OP-TEE */
		return TEST_RESULT_SUCCESS;
	}

	ret = ffa_features(FFA_FEATURE_NPI);
	if (!is_expected_ffa_error(ret, FFA_ERROR_NOT_SUPPORTED))
		return TEST_RESULT_FAIL;

	ret = ffa_features(FFA_FEATURE_SRI);
	if (is_ffa_call_error(ret) ||
	    ffa_feature_intid(ret) != FFA_SCHEDULE_RECEIVER_INTERRUPT_ID) {
		ERROR("Failed to retrieved SRI (exp: %u, got: %u)\n",
		      FFA_SCHEDULE_RECEIVER_INTERRUPT_ID,
		      ffa_feature_intid(ret));

		return TEST_RESULT_FAIL;
	}

	ret = ffa_features(FFA_FEATURE_MEI);
	if (!is_expected_ffa_error(ret, FFA_ERROR_NOT_SUPPORTED))
		return TEST_RESULT_FAIL;

	return TEST_RESULT_SUCCESS;
}

/**
 * Helper to create bitmap for NWd VMs.
 */
static bool notifications_bitmap_create(ffa_id_t vm_id,
					ffa_vcpu_count_t vcpu_count)
{
	VERBOSE("Creating bitmap for VM %x; cpu count: %u.\n",
		vm_id, vcpu_count);
	struct ffa_value ret = ffa_notification_bitmap_create(vm_id,
							      vcpu_count);

	return !is_ffa_call_error(ret);
}

/**
 * Helper to destroy bitmap for NWd VMs.
 */
static bool notifications_bitmap_destroy(ffa_id_t vm_id)
{
	VERBOSE("Destroying bitmap of VM %x.\n", vm_id);
	struct ffa_value ret = ffa_notification_bitmap_destroy(vm_id);

	return !is_ffa_call_error(ret);
}

/**
 * Test notifications bitmap create and destroy interfaces.
 */
test_result_t test_ffa_notifications_bitmap_create_destroy(void)
{
	const ffa_id_t vm_id = VM_ID(1);

	SKIP_TEST_IF_FFA_VERSION_LESS_THAN(1, 1);

	if (check_spmc_execution_level()) {
		VERBOSE("OPTEE as SPMC at S-EL1. Skipping test!\n");
		return TEST_RESULT_SKIPPED;
	}

	if (!notifications_bitmap_create(vm_id, PLATFORM_CORE_COUNT)) {
		return TEST_RESULT_FAIL;
	}

	if (!notifications_bitmap_destroy(vm_id)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test notifications bitmap destroy in a case the bitmap hasn't been created.
 */
test_result_t test_ffa_notifications_destroy_not_created(void)
{
	SKIP_TEST_IF_FFA_VERSION_LESS_THAN(1, 1);

	if (check_spmc_execution_level()) {
		VERBOSE("OPTEE as SPMC at S-EL1. Skipping test!\n");
		return TEST_RESULT_SKIPPED;
	}

	struct ffa_value ret = ffa_notification_bitmap_destroy(VM_ID(1));

	if (!is_expected_ffa_error(ret, FFA_ERROR_DENIED)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test attempt to create notifications bitmap for NWd VM if it had been
 * already created.
 */
test_result_t test_ffa_notifications_create_after_create(void)
{
	struct ffa_value ret;
	const ffa_id_t vm_id = VM_ID(2);

	SKIP_TEST_IF_FFA_VERSION_LESS_THAN(1, 1);

	if (check_spmc_execution_level()) {
		VERBOSE("OPTEE as SPMC at S-EL1. Skipping test!\n");
		return TEST_RESULT_SKIPPED;
	}

	/* First successfully create a notifications bitmap */
	if (!notifications_bitmap_create(vm_id, 1)) {
		return TEST_RESULT_FAIL;
	}

	/* Attempt to do the same to the same VM. */
	ret = ffa_notification_bitmap_create(vm_id, 1);

	if (!is_expected_ffa_error(ret, FFA_ERROR_DENIED)) {
		return TEST_RESULT_FAIL;
	}

	/* Destroy to not affect other tests */
	if (!notifications_bitmap_destroy(vm_id)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Helper function to test FFA_NOTIFICATION_BIND interface.
 * Receives all arguments to use 'cactus_notification_bind_send_cmd', and
 * expected response for the test command.
 *
 * Returns:
 * - 'true' if response was obtained and it was as expected;
 * - 'false' if there was an error with use of FFA_MSG_SEND_DIRECT_REQ, or
 * the obtained response was not as expected.
 */
static bool request_notification_bind(
	ffa_id_t cmd_dest, ffa_id_t receiver, ffa_id_t sender,
	ffa_notification_bitmap_t notifications, uint32_t flags,
	uint32_t expected_resp, uint32_t error_code)
{
	struct ffa_value ret;

	VERBOSE("TFTF requesting SP to bind notifications!\n");

	ret = cactus_notification_bind_send_cmd(HYP_ID, cmd_dest, receiver,
						sender, notifications, flags);

	if (!is_expected_cactus_response(ret, expected_resp, error_code)) {
		ERROR("Failed notifications bind. receiver: %x; sender: %x\n",
		      receiver, sender);
		return false;
	}

	return true;
}

/**
 * Helper function to test FFA_NOTIFICATION_UNBIND interface.
 * Receives all arguments to use 'cactus_notification_unbind_send_cmd', and
 * expected response for the test command.
 *
 * Returns:
 * - 'true' if response was obtained and it was as expected;
 * - 'false' if there was an error with use of FFA_MSG_SEND_DIRECT_REQ, or
 * the obtained response was not as expected.
 */
static bool request_notification_unbind(
	ffa_id_t cmd_dest, ffa_id_t receiver, ffa_id_t sender,
	ffa_notification_bitmap_t notifications, uint32_t expected_resp,
	uint32_t error_code)
{
	struct ffa_value ret;

	VERBOSE("TFTF requesting SP to unbind notifications!\n");

	ret = cactus_notification_unbind_send_cmd(HYP_ID, cmd_dest, receiver,
						  sender, notifications);

	if (!is_expected_cactus_response(ret, expected_resp, error_code)) {
		ERROR("Failed notifications unbind. receiver: %x; sender: %x\n",
		      receiver, sender);
		return false;
	}

	return true;
}

/**
 * Test calls from SPs to the bind and unbind interfaces, expecting success
 * returns.
 * This test issues a request via direct messaging to the SP, which executes
 * the test and responds with the result of the call.
 */
test_result_t test_ffa_notifications_sp_bind_unbind(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	/** First bind... */
	if (!request_notification_bind(SP_ID(1), SP_ID(1), SP_ID(2),
				       g_notifications, 0, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_bind(SP_ID(1), SP_ID(1), 1,
				       g_notifications, 0, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	/** ... then unbind using the same arguments. */
	if (!request_notification_unbind(SP_ID(1), SP_ID(1), SP_ID(2),
					 g_notifications, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_unbind(SP_ID(1), SP_ID(1), 1,
					 g_notifications, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test successful attempt of doing bind and unbind of the same set of
 * notifications.
 */
test_result_t test_ffa_notifications_vm_bind_unbind(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t vm_id = VM_ID(1);
	struct ffa_value ret;

	if (!notifications_bitmap_create(vm_id, 1)) {
		return TEST_RESULT_FAIL;
	}

	ret = ffa_notification_bind(SP_ID(2), vm_id, 0, g_notifications);

	if (!is_expected_ffa_return(ret, FFA_SUCCESS_SMC32)) {
		return TEST_RESULT_FAIL;
	}

	ret = ffa_notification_unbind(SP_ID(2), vm_id, g_notifications);

	if (!is_expected_ffa_return(ret, FFA_SUCCESS_SMC32)) {
		return TEST_RESULT_FAIL;
	}

	if (!notifications_bitmap_destroy(vm_id)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test expected failure of using a NS FF-A ID for the sender.
 */
test_result_t test_ffa_notifications_vm_bind_vm(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t vm_id = VM_ID(1);
	const ffa_id_t sender_id = VM_ID(2);
	struct ffa_value ret;

	if (!notifications_bitmap_create(vm_id, 1)) {
		return TEST_RESULT_FAIL;
	}

	ret = ffa_notification_bind(sender_id, vm_id, 0, g_notifications);

	if (!is_expected_ffa_error(ret, FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	if (!notifications_bitmap_destroy(vm_id)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test failure of both bind and unbind in case at least one notification is
 * already bound to another FF-A endpoint.
 * Expect error code FFA_ERROR_DENIED.
 */
test_result_t test_ffa_notifications_already_bound(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	/** Bind first to test */
	if (!request_notification_bind(SP_ID(1), SP_ID(1), SP_ID(2),
				       g_notifications, 0, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	/** Attempt to bind notifications bound in above request. */
	if (!request_notification_bind(SP_ID(1), SP_ID(1), SP_ID(3),
				       g_notifications, 0, CACTUS_ERROR,
				       FFA_ERROR_DENIED)) {
		return TEST_RESULT_FAIL;
	}

	/** Attempt to unbind notifications bound in initial request. */
	if (!request_notification_unbind(SP_ID(1), SP_ID(1), SP_ID(3),
					 g_notifications, CACTUS_ERROR,
					 FFA_ERROR_DENIED)) {
		return TEST_RESULT_FAIL;
	}

	/** Reset the state the SP's notifications state. */
	if (!request_notification_unbind(SP_ID(1), SP_ID(1), SP_ID(2),
					 g_notifications, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Try to bind/unbind notifications spoofing the identity of the receiver.
 * Commands will be sent to SP_ID(1), which will use SP_ID(3) as the receiver.
 * Expect error code FFA_ERROR_INVALID_PARAMETER.
 */
test_result_t test_ffa_notifications_bind_unbind_spoofing(void)
{
	ffa_notification_bitmap_t notifications = FFA_NOTIFICATION(8);

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	if (!request_notification_bind(SP_ID(1), SP_ID(3), SP_ID(2),
				       notifications, 0, CACTUS_ERROR,
				       FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_unbind(SP_ID(1), SP_ID(3), SP_ID(2),
					 notifications, CACTUS_ERROR,
					 FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Call FFA_NOTIFICATION_BIND with notifications bitmap zeroed.
 * Expecting error code FFA_ERROR_INVALID_PARAMETER.
 */
test_result_t test_ffa_notifications_bind_unbind_zeroed(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	if (!request_notification_bind(SP_ID(1), SP_ID(1), SP_ID(2),
				       0, 0, CACTUS_ERROR,
				       FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_unbind(SP_ID(1), SP_ID(1), SP_ID(2),
					 0, CACTUS_ERROR,
					 FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Helper function to test FFA_NOTIFICATION_GET interface.
 * Receives all arguments to use 'cactus_notification_get_send_cmd', and returns
 * the received response. Depending on the testing scenario, this will allow
 * to validate if the returned bitmaps are as expected.
 *
 * Returns:
 * - 'true' if response was obtained.
 * - 'false' if there was an error sending the request.
 */
static bool request_notification_get(
	ffa_id_t cmd_dest, ffa_id_t receiver, uint32_t vcpu_id, uint32_t flags,
	bool check_npi_handled, struct ffa_value *response)
{
	VERBOSE("TFTF requesting SP to get notifications!\n");

	*response = cactus_notification_get_send_cmd(HYP_ID, cmd_dest,
						     receiver, vcpu_id,
						     flags, check_npi_handled);

	return is_ffa_direct_response(*response);
}

static bool request_notification_set(
	ffa_id_t cmd_dest, ffa_id_t receiver, ffa_id_t sender, uint32_t flags,
	ffa_notification_bitmap_t notifications, ffa_id_t echo_dest,
	uint32_t exp_resp, int32_t exp_error)
{
	struct ffa_value ret;

	VERBOSE("TFTF requesting SP %x (as %x) to set notifications to %x\n",
		cmd_dest, sender, receiver);

	ret = cactus_notifications_set_send_cmd(HYP_ID, cmd_dest, receiver,
						sender, flags, notifications,
						echo_dest);

	if (!is_expected_cactus_response(ret, exp_resp, exp_error)) {
		ERROR("Failed notifications set. receiver: %x; sender: %x\n",
		      receiver, sender);
		return false;
	}

	return true;
}

/**
 * Helper to set notification. If sender is VM, the function will call directly
 * FFA_NOTIFICATION_SET, if it is an SP it will request the SP to set
 * notifications. In both cases it is expected a successful outcome.
 */
static bool notification_set(ffa_id_t receiver, ffa_id_t sender,
			     uint32_t flags,
			     ffa_notification_bitmap_t notifications)
{
	struct ffa_value ret;

	/* Sender sets notifications to receiver. */
	if (!IS_SP_ID(sender)) {
		VERBOSE("VM %x Setting notifications %llx to receiver %x\n",
			sender, notifications, receiver);
		ret = ffa_notification_set(sender, receiver, flags, notifications);

		if (!is_expected_ffa_return(ret, FFA_SUCCESS_SMC32)) {
			ERROR("Failed notifications set. receiver: %x; sender: %x\n",
			      receiver, sender);
			return false;
		}
		return true;
	}

	return request_notification_set(sender, receiver, sender, flags,
					notifications, 0, CACTUS_SUCCESS, 0);
}

/**
 * Check that SP's response to CACTUS_NOTIFICATION_GET_CMD is as expected.
 */
static bool is_notifications_get_as_expected(
	struct ffa_value *ret, uint64_t exp_from_sp, uint64_t exp_from_vm,
	ffa_id_t receiver)
{
	uint64_t from_sp;
	uint64_t from_vm;
	bool success_ret;

	/**
	 * If receiver ID is SP, this is to evaluate the response to test
	 * command 'CACTUS_NOTIFICATION_GET_CMD'.
	 */
	if (IS_SP_ID(receiver)) {
		success_ret = (cactus_get_response(*ret) == CACTUS_SUCCESS);
		from_sp = cactus_notifications_get_from_sp(*ret);
		from_vm = cactus_notifications_get_from_vm(*ret);
	} else {
		/**
		 * Else, this is to evaluate the return of FF-A call:
		 * ffa_notification_get.
		 */
		success_ret = (ffa_func_id(*ret) == FFA_SUCCESS_SMC32);
		from_sp = ffa_notification_get_from_sp(*ret);
		from_vm = ffa_notification_get_from_vm(*ret);
	}

	if (success_ret != true ||
	    exp_from_sp != from_sp ||
	    exp_from_vm != from_vm) {
		VERBOSE("Notifications not as expected:\n"
			"   from sp: %llx exp: %llx\n"
			"   from vm: %llx exp: %llx\n",
			from_sp, exp_from_sp, from_vm, exp_from_vm);
		return false;
	}

	return true;
}

static bool is_notifications_info_get_as_expected(
	struct ffa_value *ret, uint16_t *ids, uint32_t *lists_sizes,
	const uint32_t max_ids_count, uint32_t lists_count, bool more_pending)
{
	if (lists_count != ffa_notification_info_get_lists_count(*ret) ||
	    more_pending != ffa_notification_info_get_more_pending(*ret)) {
		ERROR("Notification info get not as expected.\n"
		      "    Lists counts: %u; more pending %u\n",
		      ffa_notification_info_get_lists_count(*ret),
		      ffa_notification_info_get_more_pending(*ret));
		dump_ffa_value(*ret);
		return false;
	}

	for (uint32_t i = 0; i < lists_count; i++) {
		uint32_t cur_size =
				ffa_notification_info_get_list_size(*ret,
								     i + 1);

		if (lists_sizes[i] != cur_size) {
			ERROR("Expected list size[%u] %u != %u\n", i,
			      lists_sizes[i], cur_size);
			return false;
		}
	}

	/* Compare the IDs list */
	if (memcmp(&ret->arg3, ids, sizeof(ids[0]) * max_ids_count) != 0) {
		ERROR("List of IDs not as expected\n");
		return false;
	}

	return true;
}

/**
 * Helper to bind notification and set it.
 * If receiver is SP it will request SP to perform the bind, else invokes
 * FFA_NOTIFICATION_BIND.
 * If Sender is SP it will request it to perform the set, else invokes
 * FFA_NOTIFICATION_SET.
 */
static bool notification_bind_and_set(ffa_id_t sender,
	ffa_id_t receiver, ffa_notification_bitmap_t notifications, uint32_t flags)
{
	struct ffa_value ret;
	uint32_t flags_bind = flags & FFA_NOTIFICATIONS_FLAG_PER_VCPU;

	/* Receiver binds notifications to sender. */
	if (!IS_SP_ID(receiver)) {
		ret = ffa_notification_bind(sender, receiver,
					    flags_bind, notifications);

		if (is_ffa_call_error(ret)) {
			return false;
		}
	} else {
		if (!request_notification_bind(receiver, receiver, sender,
					       notifications, flags_bind,
					       CACTUS_SUCCESS,
					       0)) {
			return false;
		}
	}

	return notification_set(receiver, sender, flags, notifications);
}

/**
 * Helper to request SP to get the notifications and validate the return.
 */
static bool notification_get_and_validate(
	ffa_id_t receiver, ffa_notification_bitmap_t exp_from_sp,
	ffa_notification_bitmap_t exp_from_vm, uint32_t vcpu_id,
	uint32_t flags, bool check_npi_handled)
{
	struct ffa_value ret;

	/* Receiver gets pending notifications. */
	if (IS_SP_ID(receiver)) {
		request_notification_get(receiver, receiver, vcpu_id, flags,
					 check_npi_handled, &ret);
	} else {
		ret = ffa_notification_get(receiver, vcpu_id, flags);
	}

	return is_notifications_get_as_expected(&ret, exp_from_sp, exp_from_vm,
						receiver);
}

static bool notifications_info_get(
	uint16_t *expected_ids, uint32_t expected_lists_count,
	uint32_t *expected_lists_sizes, const uint32_t max_ids_count,
	bool expected_more_pending)
{
	struct ffa_value ret;

	VERBOSE("Getting pending notification's info.\n");

	ret = ffa_notification_info_get();

	return !is_ffa_call_error(ret) &&
		is_notifications_info_get_as_expected(&ret, expected_ids,
						      expected_lists_sizes,
						      max_ids_count,
						      expected_lists_count,
						      expected_more_pending);
}

static volatile int schedule_receiver_interrupt_received;

static int schedule_receiver_interrupt_handler(void *data)
{
	assert(schedule_receiver_interrupt_received == 0);
	schedule_receiver_interrupt_received = 1;
	return 0;
}

/**
 * Enable the Schedule Receiver Interrupt and register the respective
 * handler.
 */
static void schedule_receiver_interrupt_init(void)
{
	tftf_irq_register_handler(FFA_SCHEDULE_RECEIVER_INTERRUPT_ID,
				  schedule_receiver_interrupt_handler);
}

/**
 * Disable the Schedule Receiver Interrupt and unregister the respective
 * handler.
 */
static void schedule_receiver_interrupt_deinit(void)
{
	tftf_irq_unregister_handler(FFA_SCHEDULE_RECEIVER_INTERRUPT_ID);
	schedule_receiver_interrupt_received = 0;
}

bool check_schedule_receiver_interrupt_handled(void)
{
	if (schedule_receiver_interrupt_received == 1) {
		VERBOSE("Schedule Receiver Interrupt handled!\n");
		schedule_receiver_interrupt_received = 0;
		return true;
	}
	VERBOSE("Schedule Receiver Interrupt NOT handled!\n");
	return false;
}

/**
 * Base function to test notifications signaling with an SP as a receiver.
 */
static test_result_t base_test_global_notifications_signal_sp(
	const ffa_id_t sender, const ffa_id_t receiver,
	const ffa_notification_bitmap_t notifications, const uint32_t flags_get,
	const uint32_t flags_set)
{
	/* Variables to validate calls to FFA_NOTIFICATION_INFO_GET. */
	uint16_t ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};
	uint32_t lists_count;
	uint32_t lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	if (!IS_SP_ID(receiver)) {
		ERROR("Receiver is expected to be an SP ID!\n");
		return TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_init();

	if (!notification_bind_and_set(sender, receiver, notifications,
				       flags_set)) {
		return TEST_RESULT_FAIL;
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		return TEST_RESULT_FAIL;
	}

	/**
	 * Simple list of IDs expected on return from FFA_NOTIFICATION_INFO_GET.
	 */
	ids[0] = receiver;
	lists_count = 1;

	if (!notifications_info_get(ids, lists_count, lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    false)) {
		return TEST_RESULT_FAIL;
	}

	if (!notification_get_and_validate(
		receiver, IS_SP_ID(sender) ? notifications : 0,
		!IS_SP_ID(sender) ? notifications : 0, 0, flags_get, true)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_unbind(receiver, receiver, sender,
					 notifications, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return TEST_RESULT_SUCCESS;
}

/**
 * Test to validate a VM can signal an SP.
 */
test_result_t test_ffa_notifications_vm_signals_sp(void)
{
	return base_test_global_notifications_signal_sp(
		1, SP_ID(1), FFA_NOTIFICATION(1) | FFA_NOTIFICATION(60),
		FFA_NOTIFICATIONS_FLAG_BITMAP_VM, 0);
}

test_result_t test_ffa_notifications_vm_signals_sp_delay_sri_fail(void)
{
	const ffa_id_t sender = 1;
	const ffa_id_t receiver = SP_ID(1);
	const ffa_notification_bitmap_t notif = (1LU << 34);
	struct ffa_value ret;

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	if (!request_notification_bind(receiver, receiver,
				       sender, notif, 0,
				       CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	ret = ffa_notification_set(sender, receiver,
				   FFA_NOTIFICATIONS_FLAG_DELAY_SRI, notif);

	if (!is_expected_ffa_error(ret, FFA_ERROR_INVALID_PARAMETER)) {
		return TEST_RESULT_FAIL;
	}

	if (!request_notification_unbind(receiver, receiver, sender,
					 notif, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * Test to validate an SP can signal an SP.
 */
test_result_t test_ffa_notifications_sp_signals_sp(void)
{
	return base_test_global_notifications_signal_sp(
		SP_ID(1), SP_ID(2), g_notifications,
		FFA_NOTIFICATIONS_FLAG_BITMAP_SP,
		FFA_NOTIFICATIONS_FLAG_DELAY_SRI);
}

/**
 * Test to validate an SP can signal a VM.
 */
test_result_t test_ffa_notifications_sp_signals_vm(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t sender = SP_ID(1);
	const ffa_id_t receiver = VM_ID(1);
	uint32_t get_flags = FFA_NOTIFICATIONS_FLAG_BITMAP_SP;
	struct ffa_value ret;
	test_result_t result = TEST_RESULT_SUCCESS;

	/* Variables to validate calls to FFA_NOTIFICATION_INFO_GET. */
	uint16_t ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};
	uint32_t lists_count;
	uint32_t lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};

	/* Ask SPMC to allocate notifications bitmap. */
	if (!notifications_bitmap_create(receiver, 1)) {
		result = TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_init();

	/* Request receiver to bind a set of notifications to the sender. */
	if (!notification_bind_and_set(sender, receiver, g_notifications,
				       FFA_NOTIFICATIONS_FLAG_DELAY_SRI)) {
		result = TEST_RESULT_FAIL;
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		result = TEST_RESULT_FAIL;
	}

	/*
	 * FFA_NOTIFICATION_INFO_GET return list should be simple, containing
	 * only the receiver's ID.
	 */
	ids[0] = receiver;
	lists_count = 1;

	if (!notifications_info_get(ids, lists_count, lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    false)) {
		result = TEST_RESULT_FAIL;
	}

	/* Get pending notifications, and retrieve response. */
	if (!notification_get_and_validate(receiver, g_notifications, 0, 0,
					   get_flags, false)) {
		result = TEST_RESULT_FAIL;
	}

	ret = ffa_notification_unbind(sender, receiver, g_notifications);

	if (!is_expected_ffa_return(ret, FFA_SUCCESS_SMC32)) {
		result = TEST_RESULT_FAIL;
	}

	if (!notifications_bitmap_destroy(receiver)) {
		result = TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return result;
}

/**
 * Test to validate it is not possible to unbind a pending notification.
 */
test_result_t test_ffa_notifications_unbind_pending(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t receiver = SP_ID(1);
	const ffa_id_t sender = VM_ID(1);
	const ffa_notification_bitmap_t notifications = FFA_NOTIFICATION(30) |
				       FFA_NOTIFICATION(35);
	uint32_t get_flags = FFA_NOTIFICATIONS_FLAG_BITMAP_VM;

	schedule_receiver_interrupt_init();

	/* Request receiver to bind a set of notifications to the sender. */
	if (!notification_bind_and_set(sender, receiver, notifications, 0)) {
		return TEST_RESULT_FAIL;
	}

	/*
	 * Attempt to unbind the pending notification, but expect error return
	 * given the notification is pending.
	 */
	if (!request_notification_unbind(receiver, receiver, sender,
					 FFA_NOTIFICATION(30),
					 CACTUS_ERROR, FFA_ERROR_DENIED)) {
		return TEST_RESULT_FAIL;
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		return TEST_RESULT_FAIL;
	}

	/*
	 * Request receiver partition to get pending notifications from VMs.
	 * Only notification 30 is expected.
	 */
	if (!notification_get_and_validate(receiver, 0, notifications, 0,
					   get_flags, false)) {
		return TEST_RESULT_FAIL;
	}

	/* Unbind all notifications, to not interfere with other tests. */
	if (!request_notification_unbind(receiver, receiver, sender,
					notifications, CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return TEST_RESULT_SUCCESS;
}

/**
 * Test the result of a call to FFA_NOTIFICATION_INFO_GET if no pending
 * notifications.
 */
test_result_t test_ffa_notifications_info_get_none(void)
{
	SKIP_TEST_IF_FFA_VERSION_LESS_THAN(1, 1);

	if (check_spmc_execution_level()) {
		VERBOSE("OPTEE as SPMC at S-EL1. Skipping test!\n");
		return TEST_RESULT_SKIPPED;
	}

	struct ffa_value ret;

	ret = ffa_notification_info_get();

	if (!is_expected_ffa_error(ret, FFA_ERROR_NO_DATA)) {
		return TEST_RESULT_FAIL;
	}

	return TEST_RESULT_SUCCESS;
}

/**
 * CPU_ON handler for testing per-vCPU notifications to SPs (either from VMs
 * or from SPs). It requests the SP to retrieve its pending notifications
 * within its current Execution Context. The SP shall obtain all per-vCPU
 * targeted to the running vCPU.
 */
static test_result_t request_notification_get_per_vcpu_on_handler(void)
{
	unsigned int core_pos = get_current_core_id();
	test_result_t result = TEST_RESULT_FAIL;

	uint64_t exp_from_vm = 0;
	uint64_t exp_from_sp = 0;

	if (IS_SP_ID(per_vcpu_sender)) {
		exp_from_sp = FFA_NOTIFICATION(core_pos);
	} else {
		exp_from_vm = FFA_NOTIFICATION(core_pos);
	}

	VERBOSE("Request get per-vCPU notification to %x, core: %u.\n",
		 per_vcpu_receiver, core_pos);

	/*
	 * Request to get notifications sent to the respective vCPU.
	 * Check also if NPI was handled by the receiver. It should have been
	 * pended at notifications set, in the respective vCPU.
	 */
	if (!notification_get_and_validate(
		per_vcpu_receiver, exp_from_sp, exp_from_vm, core_pos,
		per_vcpu_flags_get, true)) {
		goto out;
	}

	result = TEST_RESULT_SUCCESS;

out:
	INFO("Request get per-vCPU notification to %x, core: %u.\n",
		 per_vcpu_receiver, core_pos);
	/* Tell the lead CPU that the calling CPU has completed the test. */
	tftf_send_event(&per_vcpu_finished[core_pos]);

	return result;
}

static test_result_t base_npi_enable_per_cpu(bool enable)
{
	test_result_t result = TEST_RESULT_FAIL;
	uint32_t core_pos = get_current_core_id();

	VERBOSE("Request SP %x to enable NPI in core %u\n",
		 per_vcpu_receiver, core_pos);

	result = TEST_RESULT_SUCCESS;

	/* Tell the lead CPU that the calling CPU has completed the test. */
	tftf_send_event(&per_vcpu_finished[core_pos]);

	return result;
}

static test_result_t npi_enable_per_vcpu_on_handler(void)
{
	return base_npi_enable_per_cpu(true);
}

static test_result_t npi_disable_per_vcpu_on_handler(void)
{
	return base_npi_enable_per_cpu(false);
}
/**
 * Base function to test signaling of per-vCPU notifications.
 * Test whole flow between two FF-A endpoints: binding, getting notification
 * info, and getting pending notifications.
 * Each vCPU will receive a notification whose ID is the same as the core
 * position.
 */
static test_result_t base_test_per_vcpu_notifications(ffa_id_t sender,
						      ffa_id_t receiver)
{
	/*
	 * Manually set variables to validate what should be the return of to
	 * FFA_NOTIFICATION_INFO_GET.
	 */
	uint16_t exp_ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {
		receiver, 0, 1, 2,
		receiver, 3, 4, 5,
		receiver, 6, 7, 0,
		0, 0, 0, 0,
		0, 0, 0, 0,
	};
	uint32_t exp_lists_count = 3;
	uint32_t exp_lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {
		3, 3, 2, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	};

	const bool exp_more_notif_pending = false;
	test_result_t result = TEST_RESULT_SUCCESS;
	uint64_t notifications_to_unbind = 0;

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	per_vcpu_flags_get = IS_SP_ID(sender)
				? FFA_NOTIFICATIONS_FLAG_BITMAP_SP
				: FFA_NOTIFICATIONS_FLAG_BITMAP_VM;

	/* Setting global variables to be accessed by the cpu_on handler. */
	per_vcpu_receiver = receiver;
	per_vcpu_sender = sender;

	INFO("Execute npi_enable_per_vcpu_on_handler\n");
	/* Boot all cores and enable the NPI in all of them. */
	if (spm_run_multi_core_test(
		(uintptr_t)npi_enable_per_vcpu_on_handler,
		per_vcpu_finished) != TEST_RESULT_SUCCESS) {
		return TEST_RESULT_FAIL;
	}

	/*
	 * Prepare notifications bitmap to request Cactus to bind them as
	 * per-vCPU.
	 */
	for (unsigned int i = 0; i < PLATFORM_CORE_COUNT; i++) {
		notifications_to_unbind |= FFA_NOTIFICATION(i);

		uint32_t flags = FFA_NOTIFICATIONS_FLAG_PER_VCPU  |
				 FFA_NOTIFICATIONS_FLAGS_VCPU_ID((uint16_t)i);

		flags |= (IS_SP_ID(sender))
				? FFA_NOTIFICATIONS_FLAG_DELAY_SRI
				: 0;

		if (!notification_bind_and_set(sender,
					       receiver,
					       FFA_NOTIFICATION(i),
					       flags)) {
			return TEST_RESULT_FAIL;
		}
	}

	/* Call FFA_NOTIFICATION_INFO_GET and validate return. */
	if (!notifications_info_get(exp_ids, exp_lists_count, exp_lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    exp_more_notif_pending)) {
		ERROR("Info Get Failed....\n");
		result = TEST_RESULT_FAIL;
		goto out;
	}

	/*
	 * Request SP to get notifications in core 0, as this is not iterated
	 * at the CPU ON handler.
	 * Set `check_npi_handled` to true, as the receiver is supposed to be
	 * preempted by the NPI.
	 */
	if (!notification_get_and_validate(
		receiver, IS_SP_ID(sender) ? FFA_NOTIFICATION(0) : 0,
		!IS_SP_ID(sender) ? FFA_NOTIFICATION(0) : 0, 0,
		per_vcpu_flags_get, true)) {
		result = TEST_RESULT_FAIL;
	}

	INFO("Execute request_notification_get_per_vcpu_on_handler\n");
	/*
	 * Bring up all the cores, and request the receiver to get notifications
	 * in each one of them.
	 */
	if (spm_run_multi_core_test(
		(uintptr_t)request_notification_get_per_vcpu_on_handler,
		per_vcpu_finished) != TEST_RESULT_SUCCESS) {
		result = TEST_RESULT_FAIL;
	}

out:
	INFO("UNbind message on CPU:%lx\n", read_mpidr_el1());
	/* As a clean-up, unbind notifications. */
	if (!request_notification_unbind(receiver, receiver,
					 sender,
					 notifications_to_unbind,
					 CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	INFO("Execute npi_disable_per_vcpu_on_handler\n");
	/* Boot all cores and DISABLE the NPI in all of them. */
	if (spm_run_multi_core_test(
		(uintptr_t)npi_disable_per_vcpu_on_handler,
		per_vcpu_finished) != TEST_RESULT_SUCCESS) {
		return TEST_RESULT_FAIL;
	}

	return result;
}

/**
 * Test to validate a VM can signal a per-vCPU notification to an SP.
 */
test_result_t test_ffa_notifications_vm_signals_sp_per_vcpu(void)
{
	return base_test_per_vcpu_notifications(0, SP_ID(1));
}

/**
 * Test to validate an SP can signal a per-vCPU notification to an SP.
 */
test_result_t test_ffa_notifications_sp_signals_sp_per_vcpu(void)
{
	return base_test_per_vcpu_notifications(SP_ID(1), SP_ID(2));
}

static test_result_t notification_get_per_vcpu_on_handler(void)
{
	unsigned int core_pos = get_current_core_id();
	test_result_t result = TEST_RESULT_SUCCESS;

	VERBOSE("Getting per-vCPU notifications from %x, core: %u.\n",
		 per_vcpu_receiver, core_pos);

	if (!notification_get_and_validate(per_vcpu_receiver,
					   FFA_NOTIFICATION(core_pos), 0,
					   core_pos,
					   FFA_NOTIFICATIONS_FLAG_BITMAP_SP,
					   false)) {
		result = TEST_RESULT_FAIL;
	}

	/* Tell the lead CPU that the calling CPU has completed the test. */
	tftf_send_event(&per_vcpu_finished[core_pos]);

	return result;
}

/**
 * Test whole flow from binding, to getting notifications' info, and getting
 * pending notifications, namely signaling of notifications from SP to a VM.
 * Each vCPU will receive a notification whose ID is the same as the core
 * position.
 */
test_result_t test_ffa_notifications_sp_signals_vm_per_vcpu(void)
{
	/* Making a VM the receiver, and an SP the sender */
	per_vcpu_receiver = VM_ID(1);
	per_vcpu_sender = SP_ID(2);

	/**
	 * Manually set variables to validate what should be the return of to
	 * FFA_NOTIFICATION_INFO_GET.
	 */
	uint16_t exp_ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {
		per_vcpu_receiver, 0, 1, 2,
		per_vcpu_receiver, 3, 4, 5,
		per_vcpu_receiver, 6, 7, 0,
		0, 0, 0, 0,
		0, 0, 0, 0,
	};
	uint32_t exp_lists_count = 3;
	uint32_t exp_lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {
		3, 3, 2, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	};

	const bool exp_more_notif_pending = false;
	test_result_t result = TEST_RESULT_SUCCESS;
	uint64_t notifications_to_unbind = 0;
	struct ffa_value ret;

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	/* Create bitmap for receiver. */
	if (!notifications_bitmap_create(per_vcpu_receiver,
					 PLATFORM_CORE_COUNT)) {
		return TEST_RESULT_FAIL;
	}

	/* Bind notifications, and request Cactus SP to set them. */
	for (uint32_t i = 0U; i < PLATFORM_CORE_COUNT; i++) {
		notifications_to_unbind |= FFA_NOTIFICATION(i);

		uint32_t flags = FFA_NOTIFICATIONS_FLAG_DELAY_SRI |
				 FFA_NOTIFICATIONS_FLAG_PER_VCPU  |
				 FFA_NOTIFICATIONS_FLAGS_VCPU_ID((uint16_t)i);

		if (!notification_bind_and_set(per_vcpu_sender,
					      per_vcpu_receiver,
					      FFA_NOTIFICATION(i),
					      flags)) {
			return TEST_RESULT_FAIL;
		};
	}

	/* Call FFA_NOTIFICATION_INFO_GET and validate return. */
	if (!notifications_info_get(exp_ids, exp_lists_count, exp_lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    exp_more_notif_pending)) {
		ERROR("Info Get Failed....\n");
		return TEST_RESULT_FAIL;
	}

	/*
	 * Get notifications in core 0, as it is not iterated at the CPU ON
	 * handler.
	 */
	if (!notification_get_and_validate(per_vcpu_receiver,
					   FFA_NOTIFICATION(0), 0, 0,
					   FFA_NOTIFICATIONS_FLAG_BITMAP_SP,
					   false)) {
		result = TEST_RESULT_FAIL;
	}

	/* Bring up all the cores, and get notifications in each one of them. */
	if (spm_run_multi_core_test(
		(uintptr_t)notification_get_per_vcpu_on_handler,
		per_vcpu_finished) != TEST_RESULT_SUCCESS) {
		ERROR("Failed to get per-vCPU notifications\n");
		result = TEST_RESULT_FAIL;
	}

	/* As a clean-up, unbind notifications. */
	ret = ffa_notification_unbind(per_vcpu_sender, per_vcpu_receiver,
				      notifications_to_unbind);
	if (is_ffa_call_error(ret)) {
		result = TEST_RESULT_FAIL;
	}

	if (!notifications_bitmap_destroy(per_vcpu_receiver)) {
		result = TEST_RESULT_FAIL;
	}

	return result;
}

/**
 * Test to validate behavior in SWd if the SRI is not delayed. If the
 * notification setter handled a managed exit it is indicative the SRI was
 * sent immediately.
 */
test_result_t test_ffa_notifications_sp_signals_sp_immediate_sri(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t sender = SP_ID(1);
	const ffa_id_t receiver = SP_ID(2);
	uint32_t get_flags = FFA_NOTIFICATIONS_FLAG_BITMAP_SP;
	struct ffa_value ret;
	test_result_t result = TEST_RESULT_SUCCESS;

	/** Variables to validate calls to FFA_NOTIFICATION_INFO_GET. */
	uint16_t ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};
	uint32_t lists_count;
	uint32_t lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};

	ids[0] = receiver;
	lists_count = 1;

	schedule_receiver_interrupt_init();

	/* Request receiver to bind a set of notifications to the sender. */
	if (!request_notification_bind(receiver, receiver, sender,
				       g_notifications, 0, CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	/*
	 * Request sender to set notification, and expect the response is
	 * MANAGED_EXIT_INTERRUPT_ID.
	 */
	if (!request_notification_set(sender, receiver, sender, 0,
				      g_notifications, 0,
				      MANAGED_EXIT_INTERRUPT_ID, 0)) {
		ERROR("SRI not handled immediately!\n");
		result = TEST_RESULT_FAIL;
	} else {
		VERBOSE("SP %x did a managed exit.\n", sender);
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		result = TEST_RESULT_FAIL;
	}

	/* Call FFA_NOTIFICATION_INFO_GET and validate return. */
	if (!notifications_info_get(ids, lists_count, lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    false)) {
		result = TEST_RESULT_FAIL;
	}

	/* Validate notification get. */
	if (!request_notification_get(receiver, receiver, 0, get_flags, false, &ret) ||
	    !is_notifications_get_as_expected(&ret, g_notifications, 0,
					      receiver)) {
		result = TEST_RESULT_FAIL;
	}

	/*
	 * Resume setter Cactus in the handling of CACTUS_NOTIFICATIONS_SET_CMD.
	 */
	ret = cactus_resume_after_managed_exit(HYP_ID, sender);

	/* Expected result to CACTUS_NOTIFICATIONS_SET_CMD. */
	if (!is_expected_cactus_response(ret, CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	/* Unbind for clean-up. */
	if (!request_notification_unbind(receiver, receiver, sender,
					 g_notifications, CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return result;
}

/**
 * Test to validate behavior in SWd if the SRI is delayed.
 */
test_result_t test_ffa_notifications_sp_signals_sp_delayed_sri(void)
{
	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);
	const ffa_id_t sender = SP_ID(3);
	const ffa_id_t receiver = SP_ID(2);
	const ffa_id_t echo_dest = SP_ID(1);
	uint32_t echo_dest_cmd_count = 0;
	uint32_t get_flags = FFA_NOTIFICATIONS_FLAG_BITMAP_SP;
	struct ffa_value ret;
	test_result_t result = TEST_RESULT_SUCCESS;

	/** Variables to validate calls to FFA_NOTIFICATION_INFO_GET. */
	uint16_t ids[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};
	uint32_t lists_count;
	uint32_t lists_sizes[FFA_NOTIFICATIONS_INFO_GET_MAX_IDS] = {0};

	ids[0] = receiver;
	lists_count = 1;

	schedule_receiver_interrupt_init();

	/* Request receiver to bind a set of notifications to the sender. */
	if (!request_notification_bind(receiver, receiver, sender,
				       g_notifications, 0, CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	ret = cactus_get_req_count_send_cmd(HYP_ID, echo_dest);

	if (cactus_get_response(ret) == CACTUS_SUCCESS) {
		/*
		 * Save the command count from the echo_dest, to validate it
		 * has been incremented after the request to set notifications.
		 */
		echo_dest_cmd_count = cactus_get_req_count(ret);
		VERBOSE("Partition %x command count %u.\n", echo_dest,
			echo_dest_cmd_count);
	} else {
		VERBOSE("Failed to get cmds count from %u\n", echo_dest);
		result = TEST_RESULT_FAIL;
	}

	/*
	 * Request sender to set notification with Delay SRI flag, and specify
	 * echo destination.
	 */
	if (!request_notification_set(sender, receiver, sender,
				      FFA_NOTIFICATIONS_FLAG_DELAY_SRI,
				      g_notifications, echo_dest,
				      CACTUS_SUCCESS, 0)) {
		VERBOSE("Failed to set notifications!\n");
		result = TEST_RESULT_FAIL;
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		result = TEST_RESULT_FAIL;
	}

	/*
	 * Get command count again from echo_dest, to validate that it has been
	 * incremented by one. This should indicate the notification setter has
	 * issued a request to echo_dest right after the notification set, thus
	 * proving the SRI hasn't been sent right after FFA_NOTIFICATION_SET.
	 */
	ret = cactus_get_req_count_send_cmd(HYP_ID, echo_dest);
	if (cactus_get_response(ret) == CACTUS_SUCCESS) {
		if (cactus_get_req_count(ret) == echo_dest_cmd_count + 1) {
			VERBOSE("SRI successfully delayed.\n");
		} else {
			VERBOSE("Failed to get cmds count from %u.\n",
				echo_dest);
			result = TEST_RESULT_FAIL;
		}
	} else {
		VERBOSE("Failed to get cmds count from %x\n", echo_dest);
		result = TEST_RESULT_FAIL;
	}

	/* Call FFA_NOTIFICATION_INFO_GET and validate return. */
	if (!notifications_info_get(ids, lists_count, lists_sizes,
				    FFA_NOTIFICATIONS_INFO_GET_MAX_IDS,
				    false)) {
		result = TEST_RESULT_FAIL;
	}

	/* Validate notification get. */
	if (!request_notification_get(receiver, receiver, 0, get_flags, false, &ret) ||
	    !is_notifications_get_as_expected(&ret, g_notifications, 0,
					      receiver)) {
		result = TEST_RESULT_FAIL;
	}

	/* Unbind for clean-up. */
	if (!request_notification_unbind(receiver, receiver, sender,
					 g_notifications, CACTUS_SUCCESS, 0)) {
		result = TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return result;
}

test_result_t notifications_set_per_vcpu_on_handler(void)
{
	unsigned int core_pos = get_current_core_id();
	test_result_t result = TEST_RESULT_FAIL;

	if (!notification_set(per_vcpu_receiver, per_vcpu_sender,
			      FFA_NOTIFICATIONS_FLAG_DELAY_SRI |
			      FFA_NOTIFICATIONS_FLAG_PER_VCPU  |
			      FFA_NOTIFICATIONS_FLAGS_VCPU_ID(0),
			      FFA_NOTIFICATION(core_pos))) {
		goto out;
	}

	result = TEST_RESULT_SUCCESS;

out:
	/* Tell the lead CPU that the calling CPU has completed the test. */
	tftf_send_event(&per_vcpu_finished[core_pos]);

	return result;
}

test_result_t test_ffa_notifications_mp_sp_signals_up_sp(void)
{
	ffa_notification_bitmap_t to_bind = 0;

	/* prepare info get variables. */

	CHECK_SPMC_TESTING_SETUP(1, 1, expected_sp_uuids);

	/* Setting per-vCPU sender and receiver IDs. */
	per_vcpu_sender = SP_ID(2); /* MP SP */
	per_vcpu_receiver = SP_ID(3); /* UP SP */

	schedule_receiver_interrupt_init();

	/* Prepare notifications bitmap to have one bit platform core. */
	for (uint32_t i = 0; i < PLATFORM_CORE_COUNT; i++) {
		to_bind |= FFA_NOTIFICATION(i);
	}

	/* Request receiver to bind a set of notifications to the sender. */
	if (!request_notification_bind(per_vcpu_receiver, per_vcpu_receiver,
				       per_vcpu_sender, to_bind,
				       FFA_NOTIFICATIONS_FLAG_PER_VCPU,
				       CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	/*
	 * Boot up system, and then request sender to signal notification from
	 * every core into into receiver's only vCPU. Delayed SRI.
	 */
	if (!notification_set(per_vcpu_receiver, per_vcpu_sender,
			     FFA_NOTIFICATIONS_FLAG_DELAY_SRI |
			     FFA_NOTIFICATIONS_FLAG_PER_VCPU |
			     FFA_NOTIFICATIONS_FLAGS_VCPU_ID(0),
			     FFA_NOTIFICATION(0))) {
		return TEST_RESULT_FAIL;
	}

	if (spm_run_multi_core_test(
		(uintptr_t)notifications_set_per_vcpu_on_handler,
		per_vcpu_finished) != TEST_RESULT_SUCCESS) {
		return TEST_RESULT_FAIL;
	}

	if (!check_schedule_receiver_interrupt_handled()) {
		return TEST_RESULT_FAIL;
	}

	if (!notification_get_and_validate(per_vcpu_receiver, to_bind, 0, 0,
		FFA_NOTIFICATIONS_FLAG_BITMAP_SP, true)) {
		return TEST_RESULT_FAIL;
	}

	/* Request unbind. */
	if (!request_notification_unbind(per_vcpu_receiver, per_vcpu_receiver,
					per_vcpu_sender, to_bind,
					CACTUS_SUCCESS, 0)) {
		return TEST_RESULT_FAIL;
	}

	schedule_receiver_interrupt_deinit();

	return TEST_RESULT_SUCCESS;
}