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