Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022 Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | * DRTM service |
| 7 | * |
| 8 | * Authors: |
| 9 | * Lucian Paul-Trifu <lucian.paultrifu@gmail.com> |
| 10 | * Brian Nezvadovitz <brinez@microsoft.com> 2021-02-01 |
| 11 | */ |
| 12 | |
| 13 | #include <stdint.h> |
| 14 | |
Manish V Badarkhe | cc2c743 | 2022-02-24 20:22:39 +0000 | [diff] [blame] | 15 | #include <arch.h> |
| 16 | #include <arch_helpers.h> |
Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 17 | #include <common/debug.h> |
| 18 | #include <common/runtime_svc.h> |
Manish V Badarkhe | cc2c743 | 2022-02-24 20:22:39 +0000 | [diff] [blame] | 19 | #include <drivers/auth/crypto_mod.h> |
Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 20 | #include "drtm_main.h" |
| 21 | #include <services/drtm_svc.h> |
| 22 | |
Manish V Badarkhe | cc2c743 | 2022-02-24 20:22:39 +0000 | [diff] [blame] | 23 | /* This value is used by the SMC to advertise the boot PE */ |
| 24 | static uint64_t boot_pe_aff_value; |
| 25 | |
Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 26 | int drtm_setup(void) |
| 27 | { |
Manish V Badarkhe | cc2c743 | 2022-02-24 20:22:39 +0000 | [diff] [blame] | 28 | bool rc; |
| 29 | |
Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 30 | INFO("DRTM service setup\n"); |
| 31 | |
Manish V Badarkhe | cc2c743 | 2022-02-24 20:22:39 +0000 | [diff] [blame] | 32 | boot_pe_aff_value = read_mpidr_el1() & MPIDR_AFFINITY_MASK; |
| 33 | |
| 34 | rc = drtm_dma_prot_init(); |
| 35 | if (rc) { |
| 36 | return INTERNAL_ERROR; |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * initialise the platform supported crypto module that will |
| 41 | * be used by the DRTM-service to calculate hash of DRTM- |
| 42 | * implementation specific components |
| 43 | */ |
| 44 | crypto_mod_init(); |
| 45 | |
Manish V Badarkhe | 8a76603 | 2022-02-23 11:26:53 +0000 | [diff] [blame] | 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | uint64_t drtm_smc_handler(uint32_t smc_fid, |
| 50 | uint64_t x1, |
| 51 | uint64_t x2, |
| 52 | uint64_t x3, |
| 53 | uint64_t x4, |
| 54 | void *cookie, |
| 55 | void *handle, |
| 56 | uint64_t flags) |
| 57 | { |
| 58 | /* Check that the SMC call is from the Normal World. */ |
| 59 | if (!is_caller_non_secure(flags)) { |
| 60 | SMC_RET1(handle, NOT_SUPPORTED); |
| 61 | } |
| 62 | |
| 63 | switch (smc_fid) { |
| 64 | case ARM_DRTM_SVC_VERSION: |
| 65 | INFO("DRTM service handler: version\n"); |
| 66 | /* Return the version of current implementation */ |
| 67 | SMC_RET1(handle, ARM_DRTM_VERSION); |
| 68 | break; /* not reached */ |
| 69 | |
| 70 | case ARM_DRTM_SVC_FEATURES: |
| 71 | if (((x1 >> ARM_DRTM_FUNC_SHIFT) & ARM_DRTM_FUNC_MASK) == |
| 72 | ARM_DRTM_FUNC_ID) { |
| 73 | /* Dispatch function-based queries. */ |
| 74 | switch (x1 & FUNCID_MASK) { |
| 75 | case ARM_DRTM_SVC_VERSION: |
| 76 | SMC_RET1(handle, SUCCESS); |
| 77 | break; /* not reached */ |
| 78 | |
| 79 | case ARM_DRTM_SVC_FEATURES: |
| 80 | SMC_RET1(handle, SUCCESS); |
| 81 | break; /* not reached */ |
| 82 | |
| 83 | case ARM_DRTM_SVC_UNPROTECT_MEM: |
| 84 | SMC_RET1(handle, SUCCESS); |
| 85 | break; /* not reached */ |
| 86 | |
| 87 | case ARM_DRTM_SVC_DYNAMIC_LAUNCH: |
| 88 | SMC_RET1(handle, SUCCESS); |
| 89 | break; /* not reached */ |
| 90 | |
| 91 | case ARM_DRTM_SVC_CLOSE_LOCALITY: |
| 92 | WARN("ARM_DRTM_SVC_CLOSE_LOCALITY feature %s", |
| 93 | "is not supported\n"); |
| 94 | SMC_RET1(handle, NOT_SUPPORTED); |
| 95 | break; /* not reached */ |
| 96 | |
| 97 | case ARM_DRTM_SVC_GET_ERROR: |
| 98 | SMC_RET1(handle, SUCCESS); |
| 99 | break; /* not reached */ |
| 100 | |
| 101 | case ARM_DRTM_SVC_SET_ERROR: |
| 102 | SMC_RET1(handle, SUCCESS); |
| 103 | break; /* not reached */ |
| 104 | |
| 105 | case ARM_DRTM_SVC_SET_TCB_HASH: |
| 106 | WARN("ARM_DRTM_SVC_TCB_HASH feature %s", |
| 107 | "is not supported\n"); |
| 108 | SMC_RET1(handle, NOT_SUPPORTED); |
| 109 | break; /* not reached */ |
| 110 | |
| 111 | case ARM_DRTM_SVC_LOCK_TCB_HASH: |
| 112 | WARN("ARM_DRTM_SVC_LOCK_TCB_HASH feature %s", |
| 113 | "is not supported\n"); |
| 114 | SMC_RET1(handle, NOT_SUPPORTED); |
| 115 | break; /* not reached */ |
| 116 | |
| 117 | default: |
| 118 | ERROR("Unknown DRTM service function\n"); |
| 119 | SMC_RET1(handle, NOT_SUPPORTED); |
| 120 | break; /* not reached */ |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | case ARM_DRTM_SVC_UNPROTECT_MEM: |
| 125 | INFO("DRTM service handler: unprotect mem\n"); |
| 126 | SMC_RET1(handle, SMC_OK); |
| 127 | break; /* not reached */ |
| 128 | |
| 129 | case ARM_DRTM_SVC_DYNAMIC_LAUNCH: |
| 130 | INFO("DRTM service handler: dynamic launch\n"); |
| 131 | SMC_RET1(handle, SMC_OK); |
| 132 | break; /* not reached */ |
| 133 | |
| 134 | case ARM_DRTM_SVC_CLOSE_LOCALITY: |
| 135 | WARN("DRTM service handler: close locality %s\n", |
| 136 | "is not supported"); |
| 137 | SMC_RET1(handle, NOT_SUPPORTED); |
| 138 | break; /* not reached */ |
| 139 | |
| 140 | case ARM_DRTM_SVC_GET_ERROR: |
| 141 | INFO("DRTM service handler: get error\n"); |
| 142 | SMC_RET2(handle, SMC_OK, 0); |
| 143 | break; /* not reached */ |
| 144 | |
| 145 | case ARM_DRTM_SVC_SET_ERROR: |
| 146 | INFO("DRTM service handler: set error\n"); |
| 147 | SMC_RET1(handle, SMC_OK); |
| 148 | break; /* not reached */ |
| 149 | |
| 150 | case ARM_DRTM_SVC_SET_TCB_HASH: |
| 151 | WARN("DRTM service handler: set TCB hash %s\n", |
| 152 | "is not supported"); |
| 153 | SMC_RET1(handle, NOT_SUPPORTED); |
| 154 | break; /* not reached */ |
| 155 | |
| 156 | case ARM_DRTM_SVC_LOCK_TCB_HASH: |
| 157 | WARN("DRTM service handler: lock TCB hash %s\n", |
| 158 | "is not supported"); |
| 159 | SMC_RET1(handle, NOT_SUPPORTED); |
| 160 | break; /* not reached */ |
| 161 | |
| 162 | default: |
| 163 | ERROR("Unknown DRTM service function: 0x%x\n", smc_fid); |
| 164 | SMC_RET1(handle, SMC_UNK); |
| 165 | break; /* not reached */ |
| 166 | } |
| 167 | |
| 168 | /* not reached */ |
| 169 | SMC_RET1(handle, SMC_UNK); |
| 170 | } |