1 /* 2 * Copyright (c) 2015, Linaro Limited 3 * All rights reserved. 4 * Copyright (c) 2014, STMicroelectronics International N.V. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <tee/entry_fast.h> 31 #include <optee_msg.h> 32 #include <sm/optee_smc.h> 33 #include <kernel/generic_boot.h> 34 #include <kernel/tee_l2cc_mutex.h> 35 #include <kernel/misc.h> 36 #include <mm/core_mmu.h> 37 38 static void tee_entry_get_shm_config(struct thread_smc_args *args) 39 { 40 args->a0 = OPTEE_SMC_RETURN_OK; 41 args->a1 = default_nsec_shm_paddr; 42 args->a2 = default_nsec_shm_size; 43 /* Should this be TEESMC cache attributes instead? */ 44 args->a3 = core_mmu_is_shm_cached(); 45 } 46 47 static void tee_entry_fastcall_l2cc_mutex(struct thread_smc_args *args) 48 { 49 TEE_Result ret; 50 #ifdef ARM32 51 paddr_t pa = 0; 52 53 switch (args->a1) { 54 case OPTEE_SMC_L2CC_MUTEX_GET_ADDR: 55 ret = tee_get_l2cc_mutex(&pa); 56 reg_pair_from_64(pa, &args->a2, &args->a3); 57 break; 58 case OPTEE_SMC_L2CC_MUTEX_SET_ADDR: 59 pa = reg_pair_to_64(args->a2, args->a3); 60 ret = tee_set_l2cc_mutex(&pa); 61 break; 62 case OPTEE_SMC_L2CC_MUTEX_ENABLE: 63 ret = tee_enable_l2cc_mutex(); 64 break; 65 case OPTEE_SMC_L2CC_MUTEX_DISABLE: 66 ret = tee_disable_l2cc_mutex(); 67 break; 68 default: 69 args->a0 = OPTEE_SMC_RETURN_EBADCMD; 70 return; 71 } 72 #else 73 ret = TEE_ERROR_NOT_SUPPORTED; 74 #endif 75 if (ret == TEE_ERROR_NOT_SUPPORTED) 76 args->a0 = OPTEE_SMC_RETURN_UNKNOWN_FUNCTION; 77 else if (ret) 78 args->a0 = OPTEE_SMC_RETURN_EBADADDR; 79 else 80 args->a0 = OPTEE_SMC_RETURN_OK; 81 } 82 83 static void tee_entry_exchange_capabilities(struct thread_smc_args *args) 84 { 85 /* 86 * Currently we ignore OPTEE_SMC_NSEC_CAP_UNIPROCESSOR. 87 * 88 * The memory mapping of shared memory is defined as normal 89 * shared memory for SMP systems and normal memory for UP 90 * systems. Currently we map all memory as shared in secure 91 * world. 92 * 93 * When translation tables are created with shared bit cleared for 94 * uniprocessor systems we'll need to check 95 * OPTEE_SMC_NSEC_CAP_UNIPROCESSOR. 96 */ 97 98 if (args->a1 & ~OPTEE_SMC_NSEC_CAP_UNIPROCESSOR) { 99 /* Unknown capability. */ 100 args->a0 = OPTEE_SMC_RETURN_ENOTAVAIL; 101 return; 102 } 103 104 args->a0 = OPTEE_SMC_RETURN_OK; 105 args->a1 = OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM; 106 } 107 108 static void tee_entry_disable_shm_cache(struct thread_smc_args *args) 109 { 110 uint64_t cookie; 111 112 if (!thread_disable_prealloc_rpc_cache(&cookie)) { 113 args->a0 = OPTEE_SMC_RETURN_EBUSY; 114 return; 115 } 116 117 if (!cookie) { 118 args->a0 = OPTEE_SMC_RETURN_ENOTAVAIL; 119 return; 120 } 121 122 args->a0 = OPTEE_SMC_RETURN_OK; 123 args->a1 = cookie >> 32; 124 args->a2 = cookie; 125 } 126 127 static void tee_entry_enable_shm_cache(struct thread_smc_args *args) 128 { 129 if (thread_enable_prealloc_rpc_cache()) 130 args->a0 = OPTEE_SMC_RETURN_OK; 131 else 132 args->a0 = OPTEE_SMC_RETURN_EBUSY; 133 } 134 135 static void tee_entry_boot_secondary(struct thread_smc_args *args) 136 { 137 #if defined(CFG_BOOT_SECONDARY_REQUEST) 138 if (!generic_boot_core_release(args->a1, (paddr_t)(args->a3))) 139 args->a0 = OPTEE_SMC_RETURN_OK; 140 else 141 args->a0 = OPTEE_SMC_RETURN_EBADCMD; 142 #else 143 args->a0 = OPTEE_SMC_RETURN_ENOTAVAIL; 144 #endif 145 } 146 147 void tee_entry_fast(struct thread_smc_args *args) 148 { 149 switch (args->a0) { 150 151 /* Generic functions */ 152 case OPTEE_SMC_CALLS_COUNT: 153 tee_entry_get_api_call_count(args); 154 break; 155 case OPTEE_SMC_CALLS_UID: 156 tee_entry_get_api_uuid(args); 157 break; 158 case OPTEE_SMC_CALLS_REVISION: 159 tee_entry_get_api_revision(args); 160 break; 161 case OPTEE_SMC_CALL_GET_OS_UUID: 162 tee_entry_get_os_uuid(args); 163 break; 164 case OPTEE_SMC_CALL_GET_OS_REVISION: 165 tee_entry_get_os_revision(args); 166 break; 167 168 /* OP-TEE specific SMC functions */ 169 case OPTEE_SMC_GET_SHM_CONFIG: 170 tee_entry_get_shm_config(args); 171 break; 172 case OPTEE_SMC_L2CC_MUTEX: 173 tee_entry_fastcall_l2cc_mutex(args); 174 break; 175 case OPTEE_SMC_EXCHANGE_CAPABILITIES: 176 tee_entry_exchange_capabilities(args); 177 break; 178 case OPTEE_SMC_DISABLE_SHM_CACHE: 179 tee_entry_disable_shm_cache(args); 180 break; 181 case OPTEE_SMC_ENABLE_SHM_CACHE: 182 tee_entry_enable_shm_cache(args); 183 break; 184 case OPTEE_SMC_BOOT_SECONDARY: 185 tee_entry_boot_secondary(args); 186 break; 187 188 default: 189 args->a0 = OPTEE_SMC_RETURN_UNKNOWN_FUNCTION; 190 break; 191 } 192 } 193 194 size_t tee_entry_generic_get_api_call_count(void) 195 { 196 /* 197 * All the different calls handled in this file. If the specific 198 * target has additional calls it will call this function and 199 * add the number of calls the target has added. 200 */ 201 return 9; 202 } 203 204 void __weak tee_entry_get_api_call_count(struct thread_smc_args *args) 205 { 206 args->a0 = tee_entry_generic_get_api_call_count(); 207 } 208 209 void __weak tee_entry_get_api_uuid(struct thread_smc_args *args) 210 { 211 args->a0 = OPTEE_MSG_UID_0; 212 args->a1 = OPTEE_MSG_UID_1; 213 args->a2 = OPTEE_MSG_UID_2; 214 args->a3 = OPTEE_MSG_UID_3; 215 } 216 217 void __weak tee_entry_get_api_revision(struct thread_smc_args *args) 218 { 219 args->a0 = OPTEE_MSG_REVISION_MAJOR; 220 args->a1 = OPTEE_MSG_REVISION_MINOR; 221 } 222 223 void __weak tee_entry_get_os_uuid(struct thread_smc_args *args) 224 { 225 args->a0 = OPTEE_MSG_OS_OPTEE_UUID_0; 226 args->a1 = OPTEE_MSG_OS_OPTEE_UUID_1; 227 args->a2 = OPTEE_MSG_OS_OPTEE_UUID_2; 228 args->a3 = OPTEE_MSG_OS_OPTEE_UUID_3; 229 } 230 231 void __weak tee_entry_get_os_revision(struct thread_smc_args *args) 232 { 233 args->a0 = CFG_OPTEE_REVISION_MAJOR; 234 args->a1 = CFG_OPTEE_REVISION_MINOR; 235 } 236