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107 lines
3.0 KiB
107 lines
3.0 KiB
/*
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* Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <common/debug.h>
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#include <services/el3_spmc_logical_sp.h>
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#include <services/ffa_svc.h>
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#include "spmc.h"
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/*******************************************************************************
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* Validate any logical partition descriptors before we initialise.
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* Initialization of said partitions will be taken care of during SPMC boot.
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******************************************************************************/
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int el3_sp_desc_validate(void)
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{
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struct el3_lp_desc *lp_array;
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/*
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* Assert the number of descriptors is less than maximum allowed.
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* This constant should be define on a per platform basis.
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*/
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assert(EL3_LP_DESCS_COUNT <= MAX_EL3_LP_DESCS_COUNT);
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/* Check the array bounds are valid. */
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assert(EL3_LP_DESCS_END >= EL3_LP_DESCS_START);
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/* If no logical partitions are implemented then simply bail out. */
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if (EL3_LP_DESCS_COUNT == 0U) {
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return 0;
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}
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lp_array = get_el3_lp_array();
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for (unsigned int index = 0; index < EL3_LP_DESCS_COUNT; index++) {
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struct el3_lp_desc *lp_desc = &lp_array[index];
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/* Validate our logical partition descriptors. */
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if (lp_desc == NULL) {
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ERROR("Invalid Logical SP Descriptor\n");
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return -EINVAL;
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}
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/*
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* Ensure the ID follows the convention to indidate it resides
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* in the secure world.
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*/
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if (!ffa_is_secure_world_id(lp_desc->sp_id)) {
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ERROR("Invalid Logical SP ID (0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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/* Ensure we don't conflict with the SPMC partition ID. */
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if (lp_desc->sp_id == FFA_SPMC_ID) {
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ERROR("Logical SP ID clashes with SPMC ID(0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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/* Ensure the UUID is not the NULL UUID. */
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if (lp_desc->uuid[0] == 0 && lp_desc->uuid[1] == 0 &&
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lp_desc->uuid[2] == 0 && lp_desc->uuid[3] == 0) {
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ERROR("Invalid UUID for Logical SP (0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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/* Ensure init function callback is registered. */
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if (lp_desc->init == NULL) {
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ERROR("Missing init function for Logical SP(0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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/* Ensure that LP only supports receiving direct requests. */
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if (lp_desc->properties &
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~(FFA_PARTITION_DIRECT_REQ_RECV)) {
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ERROR("Invalid partition properties (0x%x)\n",
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lp_desc->properties);
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return -EINVAL;
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}
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/* Ensure direct request function callback is registered. */
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if (lp_desc->direct_req == NULL) {
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ERROR("No Direct Req handler for Logical SP (0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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/* Ensure that all partition IDs are unique. */
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for (unsigned int inner_idx = index + 1;
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inner_idx < EL3_LP_DESCS_COUNT; inner_idx++) {
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if (lp_desc->sp_id == lp_array[inner_idx].sp_id) {
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ERROR("Duplicate SP ID Detected (0x%x)\n",
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lp_desc->sp_id);
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return -EINVAL;
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}
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}
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}
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return 0;
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}
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