Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1 | /* |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 2 | * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved. |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <assert.h> |
| 8 | #include <errno.h> |
| 9 | |
| 10 | #include <arch_helpers.h> |
| 11 | #include <bl31/bl31.h> |
| 12 | #include <bl31/ehf.h> |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 13 | #include <bl31/interrupt_mgmt.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 14 | #include <common/debug.h> |
| 15 | #include <common/fdt_wrappers.h> |
| 16 | #include <common/runtime_svc.h> |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 17 | #include <common/uuid.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 18 | #include <lib/el3_runtime/context_mgmt.h> |
| 19 | #include <lib/smccc.h> |
| 20 | #include <lib/utils.h> |
| 21 | #include <lib/xlat_tables/xlat_tables_v2.h> |
| 22 | #include <libfdt.h> |
| 23 | #include <plat/common/platform.h> |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 24 | #include <services/el3_spmc_logical_sp.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 25 | #include <services/ffa_svc.h> |
| 26 | #include <services/spmc_svc.h> |
| 27 | #include <services/spmd_svc.h> |
| 28 | #include "spmc.h" |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 29 | #include "spmc_shared_mem.h" |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 30 | |
| 31 | #include <platform_def.h> |
| 32 | |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 33 | /* FFA_MEM_PERM_* helpers */ |
| 34 | #define FFA_MEM_PERM_MASK U(7) |
| 35 | #define FFA_MEM_PERM_DATA_MASK U(3) |
| 36 | #define FFA_MEM_PERM_DATA_SHIFT U(0) |
| 37 | #define FFA_MEM_PERM_DATA_NA U(0) |
| 38 | #define FFA_MEM_PERM_DATA_RW U(1) |
| 39 | #define FFA_MEM_PERM_DATA_RES U(2) |
| 40 | #define FFA_MEM_PERM_DATA_RO U(3) |
| 41 | #define FFA_MEM_PERM_INST_EXEC (U(0) << 2) |
| 42 | #define FFA_MEM_PERM_INST_NON_EXEC (U(1) << 2) |
| 43 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 44 | /* Declare the maximum number of SPs and El3 LPs. */ |
| 45 | #define MAX_SP_LP_PARTITIONS SECURE_PARTITION_COUNT + MAX_EL3_LP_DESCS_COUNT |
| 46 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 47 | /* |
| 48 | * Allocate a secure partition descriptor to describe each SP in the system that |
| 49 | * does not reside at EL3. |
| 50 | */ |
| 51 | static struct secure_partition_desc sp_desc[SECURE_PARTITION_COUNT]; |
| 52 | |
| 53 | /* |
| 54 | * Allocate an NS endpoint descriptor to describe each VM and the Hypervisor in |
| 55 | * the system that interacts with a SP. It is used to track the Hypervisor |
| 56 | * buffer pair, version and ID for now. It could be extended to track VM |
| 57 | * properties when the SPMC supports indirect messaging. |
| 58 | */ |
| 59 | static struct ns_endpoint_desc ns_ep_desc[NS_PARTITION_COUNT]; |
| 60 | |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 61 | static uint64_t spmc_sp_interrupt_handler(uint32_t id, |
| 62 | uint32_t flags, |
| 63 | void *handle, |
| 64 | void *cookie); |
| 65 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 66 | /* |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 67 | * Helper function to obtain the array storing the EL3 |
| 68 | * Logical Partition descriptors. |
| 69 | */ |
| 70 | struct el3_lp_desc *get_el3_lp_array(void) |
| 71 | { |
| 72 | return (struct el3_lp_desc *) EL3_LP_DESCS_START; |
| 73 | } |
| 74 | |
| 75 | /* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 76 | * Helper function to obtain the descriptor of the last SP to whom control was |
| 77 | * handed to on this physical cpu. Currently, we assume there is only one SP. |
| 78 | * TODO: Expand to track multiple partitions when required. |
| 79 | */ |
| 80 | struct secure_partition_desc *spmc_get_current_sp_ctx(void) |
| 81 | { |
| 82 | return &(sp_desc[ACTIVE_SP_DESC_INDEX]); |
| 83 | } |
| 84 | |
| 85 | /* |
| 86 | * Helper function to obtain the execution context of an SP on the |
| 87 | * current physical cpu. |
| 88 | */ |
| 89 | struct sp_exec_ctx *spmc_get_sp_ec(struct secure_partition_desc *sp) |
| 90 | { |
| 91 | return &(sp->ec[get_ec_index(sp)]); |
| 92 | } |
| 93 | |
| 94 | /* Helper function to get pointer to SP context from its ID. */ |
| 95 | struct secure_partition_desc *spmc_get_sp_ctx(uint16_t id) |
| 96 | { |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 97 | /* Check for Secure World Partitions. */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 98 | for (unsigned int i = 0U; i < SECURE_PARTITION_COUNT; i++) { |
| 99 | if (sp_desc[i].sp_id == id) { |
| 100 | return &(sp_desc[i]); |
| 101 | } |
| 102 | } |
| 103 | return NULL; |
| 104 | } |
| 105 | |
Marc Bonnici | 52a9cbc | 2021-11-24 10:32:16 +0000 | [diff] [blame] | 106 | /* |
| 107 | * Helper function to obtain the descriptor of the Hypervisor or OS kernel. |
| 108 | * We assume that the first descriptor is reserved for this entity. |
| 109 | */ |
| 110 | struct ns_endpoint_desc *spmc_get_hyp_ctx(void) |
| 111 | { |
| 112 | return &(ns_ep_desc[0]); |
| 113 | } |
| 114 | |
Marc Bonnici | a2cfa61 | 2021-11-24 10:33:48 +0000 | [diff] [blame] | 115 | /* |
| 116 | * Helper function to obtain the RX/TX buffer pair descriptor of the Hypervisor |
| 117 | * or OS kernel in the normal world or the last SP that was run. |
| 118 | */ |
| 119 | struct mailbox *spmc_get_mbox_desc(bool secure_origin) |
| 120 | { |
| 121 | /* Obtain the RX/TX buffer pair descriptor. */ |
| 122 | if (secure_origin) { |
| 123 | return &(spmc_get_current_sp_ctx()->mailbox); |
| 124 | } else { |
| 125 | return &(spmc_get_hyp_ctx()->mailbox); |
| 126 | } |
| 127 | } |
| 128 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 129 | /****************************************************************************** |
| 130 | * This function returns to the place where spmc_sp_synchronous_entry() was |
| 131 | * called originally. |
| 132 | ******************************************************************************/ |
| 133 | __dead2 void spmc_sp_synchronous_exit(struct sp_exec_ctx *ec, uint64_t rc) |
| 134 | { |
| 135 | /* |
| 136 | * The SPM must have initiated the original request through a |
| 137 | * synchronous entry into the secure partition. Jump back to the |
| 138 | * original C runtime context with the value of rc in x0; |
| 139 | */ |
| 140 | spm_secure_partition_exit(ec->c_rt_ctx, rc); |
| 141 | |
| 142 | panic(); |
| 143 | } |
| 144 | |
| 145 | /******************************************************************************* |
| 146 | * Return FFA_ERROR with specified error code. |
| 147 | ******************************************************************************/ |
| 148 | uint64_t spmc_ffa_error_return(void *handle, int error_code) |
| 149 | { |
| 150 | SMC_RET8(handle, FFA_ERROR, |
| 151 | FFA_TARGET_INFO_MBZ, error_code, |
| 152 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 153 | FFA_PARAM_MBZ, FFA_PARAM_MBZ); |
| 154 | } |
| 155 | |
| 156 | /****************************************************************************** |
| 157 | * Helper function to validate a secure partition ID to ensure it does not |
| 158 | * conflict with any other FF-A component and follows the convention to |
| 159 | * indicate it resides within the secure world. |
| 160 | ******************************************************************************/ |
| 161 | bool is_ffa_secure_id_valid(uint16_t partition_id) |
| 162 | { |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 163 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 164 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 165 | /* Ensure the ID is not the invalid partition ID. */ |
| 166 | if (partition_id == INV_SP_ID) { |
| 167 | return false; |
| 168 | } |
| 169 | |
| 170 | /* Ensure the ID is not the SPMD ID. */ |
| 171 | if (partition_id == SPMD_DIRECT_MSG_ENDPOINT_ID) { |
| 172 | return false; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Ensure the ID follows the convention to indicate it resides |
| 177 | * in the secure world. |
| 178 | */ |
| 179 | if (!ffa_is_secure_world_id(partition_id)) { |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | /* Ensure we don't conflict with the SPMC partition ID. */ |
| 184 | if (partition_id == FFA_SPMC_ID) { |
| 185 | return false; |
| 186 | } |
| 187 | |
| 188 | /* Ensure we do not already have an SP context with this ID. */ |
| 189 | if (spmc_get_sp_ctx(partition_id)) { |
| 190 | return false; |
| 191 | } |
| 192 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 193 | /* Ensure we don't clash with any Logical SP's. */ |
| 194 | for (unsigned int i = 0U; i < EL3_LP_DESCS_COUNT; i++) { |
| 195 | if (el3_lp_descs[i].sp_id == partition_id) { |
| 196 | return false; |
| 197 | } |
| 198 | } |
| 199 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 200 | return true; |
| 201 | } |
| 202 | |
| 203 | /******************************************************************************* |
Marc Bonnici | 7e19db8 | 2021-11-29 17:17:29 +0000 | [diff] [blame] | 204 | * This function either forwards the request to the other world or returns |
| 205 | * with an ERET depending on the source of the call. |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 206 | * We can assume that the destination is for an entity at a lower exception |
| 207 | * level as any messages destined for a logical SP resident in EL3 will have |
| 208 | * already been taken care of by the SPMC before entering this function. |
Marc Bonnici | 7e19db8 | 2021-11-29 17:17:29 +0000 | [diff] [blame] | 209 | ******************************************************************************/ |
| 210 | static uint64_t spmc_smc_return(uint32_t smc_fid, |
| 211 | bool secure_origin, |
| 212 | uint64_t x1, |
| 213 | uint64_t x2, |
| 214 | uint64_t x3, |
| 215 | uint64_t x4, |
| 216 | void *handle, |
| 217 | void *cookie, |
| 218 | uint64_t flags, |
| 219 | uint16_t dst_id) |
| 220 | { |
| 221 | /* If the destination is in the normal world always go via the SPMD. */ |
| 222 | if (ffa_is_normal_world_id(dst_id)) { |
| 223 | return spmd_smc_handler(smc_fid, x1, x2, x3, x4, |
| 224 | cookie, handle, flags); |
| 225 | } |
| 226 | /* |
| 227 | * If the caller is secure and we want to return to the secure world, |
| 228 | * ERET directly. |
| 229 | */ |
| 230 | else if (secure_origin && ffa_is_secure_world_id(dst_id)) { |
| 231 | SMC_RET5(handle, smc_fid, x1, x2, x3, x4); |
| 232 | } |
| 233 | /* If we originated in the normal world then switch contexts. */ |
| 234 | else if (!secure_origin && ffa_is_secure_world_id(dst_id)) { |
| 235 | return spmd_smc_switch_state(smc_fid, secure_origin, x1, x2, |
| 236 | x3, x4, handle); |
| 237 | } else { |
| 238 | /* Unknown State. */ |
| 239 | panic(); |
| 240 | } |
| 241 | |
| 242 | /* Shouldn't be Reached. */ |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | /******************************************************************************* |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 247 | * FF-A ABI Handlers. |
| 248 | ******************************************************************************/ |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 249 | |
| 250 | /******************************************************************************* |
| 251 | * Helper function to validate arg2 as part of a direct message. |
| 252 | ******************************************************************************/ |
| 253 | static inline bool direct_msg_validate_arg2(uint64_t x2) |
| 254 | { |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 255 | /* Check message type. */ |
| 256 | if (x2 & FFA_FWK_MSG_BIT) { |
| 257 | /* We have a framework message, ensure it is a known message. */ |
| 258 | if (x2 & ~(FFA_FWK_MSG_MASK | FFA_FWK_MSG_BIT)) { |
| 259 | VERBOSE("Invalid message format 0x%lx.\n", x2); |
| 260 | return false; |
| 261 | } |
| 262 | } else { |
| 263 | /* We have a partition messages, ensure x2 is not set. */ |
| 264 | if (x2 != (uint64_t) 0) { |
| 265 | VERBOSE("Arg2 MBZ for partition messages. (0x%lx).\n", |
| 266 | x2); |
| 267 | return false; |
| 268 | } |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 269 | } |
| 270 | return true; |
| 271 | } |
| 272 | |
| 273 | /******************************************************************************* |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 274 | * Helper function to validate the destination ID of a direct response. |
| 275 | ******************************************************************************/ |
| 276 | static bool direct_msg_validate_dst_id(uint16_t dst_id) |
| 277 | { |
| 278 | struct secure_partition_desc *sp; |
| 279 | |
| 280 | /* Check if we're targeting a normal world partition. */ |
| 281 | if (ffa_is_normal_world_id(dst_id)) { |
| 282 | return true; |
| 283 | } |
| 284 | |
| 285 | /* Or directed to the SPMC itself.*/ |
| 286 | if (dst_id == FFA_SPMC_ID) { |
| 287 | return true; |
| 288 | } |
| 289 | |
| 290 | /* Otherwise ensure the SP exists. */ |
| 291 | sp = spmc_get_sp_ctx(dst_id); |
| 292 | if (sp != NULL) { |
| 293 | return true; |
| 294 | } |
| 295 | |
| 296 | return false; |
| 297 | } |
| 298 | |
| 299 | /******************************************************************************* |
| 300 | * Helper function to validate the response from a Logical Partition. |
| 301 | ******************************************************************************/ |
| 302 | static bool direct_msg_validate_lp_resp(uint16_t origin_id, uint16_t lp_id, |
| 303 | void *handle) |
| 304 | { |
| 305 | /* Retrieve populated Direct Response Arguments. */ |
| 306 | uint64_t x1 = SMC_GET_GP(handle, CTX_GPREG_X1); |
| 307 | uint64_t x2 = SMC_GET_GP(handle, CTX_GPREG_X2); |
| 308 | uint16_t src_id = ffa_endpoint_source(x1); |
| 309 | uint16_t dst_id = ffa_endpoint_destination(x1); |
| 310 | |
| 311 | if (src_id != lp_id) { |
| 312 | ERROR("Invalid EL3 LP source ID (0x%x).\n", src_id); |
| 313 | return false; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Check the destination ID is valid and ensure the LP is responding to |
| 318 | * the original request. |
| 319 | */ |
| 320 | if ((!direct_msg_validate_dst_id(dst_id)) || (dst_id != origin_id)) { |
| 321 | ERROR("Invalid EL3 LP destination ID (0x%x).\n", dst_id); |
| 322 | return false; |
| 323 | } |
| 324 | |
| 325 | if (!direct_msg_validate_arg2(x2)) { |
| 326 | ERROR("Invalid EL3 LP message encoding.\n"); |
| 327 | return false; |
| 328 | } |
| 329 | return true; |
| 330 | } |
| 331 | |
| 332 | /******************************************************************************* |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 333 | * Handle direct request messages and route to the appropriate destination. |
| 334 | ******************************************************************************/ |
| 335 | static uint64_t direct_req_smc_handler(uint32_t smc_fid, |
| 336 | bool secure_origin, |
| 337 | uint64_t x1, |
| 338 | uint64_t x2, |
| 339 | uint64_t x3, |
| 340 | uint64_t x4, |
| 341 | void *cookie, |
| 342 | void *handle, |
| 343 | uint64_t flags) |
| 344 | { |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 345 | uint16_t src_id = ffa_endpoint_source(x1); |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 346 | uint16_t dst_id = ffa_endpoint_destination(x1); |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 347 | struct el3_lp_desc *el3_lp_descs; |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 348 | struct secure_partition_desc *sp; |
| 349 | unsigned int idx; |
| 350 | |
| 351 | /* Check if arg2 has been populated correctly based on message type. */ |
| 352 | if (!direct_msg_validate_arg2(x2)) { |
| 353 | return spmc_ffa_error_return(handle, |
| 354 | FFA_ERROR_INVALID_PARAMETER); |
| 355 | } |
| 356 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 357 | /* Validate Sender is either the current SP or from the normal world. */ |
| 358 | if ((secure_origin && src_id != spmc_get_current_sp_ctx()->sp_id) || |
| 359 | (!secure_origin && !ffa_is_normal_world_id(src_id))) { |
| 360 | ERROR("Invalid direct request source ID (0x%x).\n", src_id); |
| 361 | return spmc_ffa_error_return(handle, |
| 362 | FFA_ERROR_INVALID_PARAMETER); |
| 363 | } |
| 364 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 365 | el3_lp_descs = get_el3_lp_array(); |
| 366 | |
| 367 | /* Check if the request is destined for a Logical Partition. */ |
| 368 | for (unsigned int i = 0U; i < MAX_EL3_LP_DESCS_COUNT; i++) { |
| 369 | if (el3_lp_descs[i].sp_id == dst_id) { |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 370 | uint64_t ret = el3_lp_descs[i].direct_req( |
| 371 | smc_fid, secure_origin, x1, x2, |
| 372 | x3, x4, cookie, handle, flags); |
| 373 | if (!direct_msg_validate_lp_resp(src_id, dst_id, |
| 374 | handle)) { |
| 375 | panic(); |
| 376 | } |
| 377 | |
| 378 | /* Message checks out. */ |
| 379 | return ret; |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 380 | } |
| 381 | } |
| 382 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 383 | /* |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 384 | * If the request was not targeted to a LSP and from the secure world |
| 385 | * then it is invalid since a SP cannot call into the Normal world and |
| 386 | * there is no other SP to call into. If there are other SPs in future |
| 387 | * then the partition runtime model would need to be validated as well. |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 388 | */ |
| 389 | if (secure_origin) { |
| 390 | VERBOSE("Direct request not supported to the Normal World.\n"); |
| 391 | return spmc_ffa_error_return(handle, |
| 392 | FFA_ERROR_INVALID_PARAMETER); |
| 393 | } |
| 394 | |
| 395 | /* Check if the SP ID is valid. */ |
| 396 | sp = spmc_get_sp_ctx(dst_id); |
| 397 | if (sp == NULL) { |
| 398 | VERBOSE("Direct request to unknown partition ID (0x%x).\n", |
| 399 | dst_id); |
| 400 | return spmc_ffa_error_return(handle, |
| 401 | FFA_ERROR_INVALID_PARAMETER); |
| 402 | } |
| 403 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 404 | /* Protect the runtime state of a UP S-EL0 SP with a lock. */ |
| 405 | if (sp->runtime_el == S_EL0) { |
| 406 | spin_lock(&sp->rt_state_lock); |
| 407 | } |
| 408 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 409 | /* |
| 410 | * Check that the target execution context is in a waiting state before |
| 411 | * forwarding the direct request to it. |
| 412 | */ |
| 413 | idx = get_ec_index(sp); |
| 414 | if (sp->ec[idx].rt_state != RT_STATE_WAITING) { |
| 415 | VERBOSE("SP context on core%u is not waiting (%u).\n", |
| 416 | idx, sp->ec[idx].rt_model); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 417 | |
| 418 | if (sp->runtime_el == S_EL0) { |
| 419 | spin_unlock(&sp->rt_state_lock); |
| 420 | } |
| 421 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 422 | return spmc_ffa_error_return(handle, FFA_ERROR_BUSY); |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * Everything checks out so forward the request to the SP after updating |
| 427 | * its state and runtime model. |
| 428 | */ |
| 429 | sp->ec[idx].rt_state = RT_STATE_RUNNING; |
| 430 | sp->ec[idx].rt_model = RT_MODEL_DIR_REQ; |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 431 | sp->ec[idx].dir_req_origin_id = src_id; |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 432 | |
| 433 | if (sp->runtime_el == S_EL0) { |
| 434 | spin_unlock(&sp->rt_state_lock); |
| 435 | } |
| 436 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 437 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 438 | handle, cookie, flags, dst_id); |
| 439 | } |
| 440 | |
| 441 | /******************************************************************************* |
| 442 | * Handle direct response messages and route to the appropriate destination. |
| 443 | ******************************************************************************/ |
| 444 | static uint64_t direct_resp_smc_handler(uint32_t smc_fid, |
| 445 | bool secure_origin, |
| 446 | uint64_t x1, |
| 447 | uint64_t x2, |
| 448 | uint64_t x3, |
| 449 | uint64_t x4, |
| 450 | void *cookie, |
| 451 | void *handle, |
| 452 | uint64_t flags) |
| 453 | { |
| 454 | uint16_t dst_id = ffa_endpoint_destination(x1); |
| 455 | struct secure_partition_desc *sp; |
| 456 | unsigned int idx; |
| 457 | |
| 458 | /* Check if arg2 has been populated correctly based on message type. */ |
| 459 | if (!direct_msg_validate_arg2(x2)) { |
| 460 | return spmc_ffa_error_return(handle, |
| 461 | FFA_ERROR_INVALID_PARAMETER); |
| 462 | } |
| 463 | |
| 464 | /* Check that the response did not originate from the Normal world. */ |
| 465 | if (!secure_origin) { |
| 466 | VERBOSE("Direct Response not supported from Normal World.\n"); |
| 467 | return spmc_ffa_error_return(handle, |
| 468 | FFA_ERROR_INVALID_PARAMETER); |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Check that the response is either targeted to the Normal world or the |
| 473 | * SPMC e.g. a PM response. |
| 474 | */ |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 475 | if (!direct_msg_validate_dst_id(dst_id)) { |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 476 | VERBOSE("Direct response to invalid partition ID (0x%x).\n", |
| 477 | dst_id); |
| 478 | return spmc_ffa_error_return(handle, |
| 479 | FFA_ERROR_INVALID_PARAMETER); |
| 480 | } |
| 481 | |
| 482 | /* Obtain the SP descriptor and update its runtime state. */ |
| 483 | sp = spmc_get_sp_ctx(ffa_endpoint_source(x1)); |
| 484 | if (sp == NULL) { |
| 485 | VERBOSE("Direct response to unknown partition ID (0x%x).\n", |
| 486 | dst_id); |
| 487 | return spmc_ffa_error_return(handle, |
| 488 | FFA_ERROR_INVALID_PARAMETER); |
| 489 | } |
| 490 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 491 | if (sp->runtime_el == S_EL0) { |
| 492 | spin_lock(&sp->rt_state_lock); |
| 493 | } |
| 494 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 495 | /* Sanity check state is being tracked correctly in the SPMC. */ |
| 496 | idx = get_ec_index(sp); |
| 497 | assert(sp->ec[idx].rt_state == RT_STATE_RUNNING); |
| 498 | |
| 499 | /* Ensure SP execution context was in the right runtime model. */ |
| 500 | if (sp->ec[idx].rt_model != RT_MODEL_DIR_REQ) { |
| 501 | VERBOSE("SP context on core%u not handling direct req (%u).\n", |
| 502 | idx, sp->ec[idx].rt_model); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 503 | if (sp->runtime_el == S_EL0) { |
| 504 | spin_unlock(&sp->rt_state_lock); |
| 505 | } |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 506 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 507 | } |
| 508 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 509 | if (sp->ec[idx].dir_req_origin_id != dst_id) { |
| 510 | WARN("Invalid direct resp partition ID 0x%x != 0x%x on core%u.\n", |
| 511 | dst_id, sp->ec[idx].dir_req_origin_id, idx); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 512 | if (sp->runtime_el == S_EL0) { |
| 513 | spin_unlock(&sp->rt_state_lock); |
| 514 | } |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 515 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 516 | } |
| 517 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 518 | /* Update the state of the SP execution context. */ |
| 519 | sp->ec[idx].rt_state = RT_STATE_WAITING; |
| 520 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 521 | /* Clear the ongoing direct request ID. */ |
| 522 | sp->ec[idx].dir_req_origin_id = INV_SP_ID; |
| 523 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 524 | if (sp->runtime_el == S_EL0) { |
| 525 | spin_unlock(&sp->rt_state_lock); |
| 526 | } |
| 527 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 528 | /* |
| 529 | * If the receiver is not the SPMC then forward the response to the |
| 530 | * Normal world. |
| 531 | */ |
| 532 | if (dst_id == FFA_SPMC_ID) { |
| 533 | spmc_sp_synchronous_exit(&sp->ec[idx], x4); |
| 534 | /* Should not get here. */ |
| 535 | panic(); |
| 536 | } |
| 537 | |
| 538 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 539 | handle, cookie, flags, dst_id); |
| 540 | } |
| 541 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 542 | /******************************************************************************* |
| 543 | * This function handles the FFA_MSG_WAIT SMC to allow an SP to relinquish its |
| 544 | * cycles. |
| 545 | ******************************************************************************/ |
| 546 | static uint64_t msg_wait_handler(uint32_t smc_fid, |
| 547 | bool secure_origin, |
| 548 | uint64_t x1, |
| 549 | uint64_t x2, |
| 550 | uint64_t x3, |
| 551 | uint64_t x4, |
| 552 | void *cookie, |
| 553 | void *handle, |
| 554 | uint64_t flags) |
| 555 | { |
| 556 | struct secure_partition_desc *sp; |
| 557 | unsigned int idx; |
| 558 | |
| 559 | /* |
| 560 | * Check that the response did not originate from the Normal world as |
| 561 | * only the secure world can call this ABI. |
| 562 | */ |
| 563 | if (!secure_origin) { |
| 564 | VERBOSE("Normal world cannot call FFA_MSG_WAIT.\n"); |
| 565 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 566 | } |
| 567 | |
| 568 | /* Get the descriptor of the SP that invoked FFA_MSG_WAIT. */ |
| 569 | sp = spmc_get_current_sp_ctx(); |
| 570 | if (sp == NULL) { |
| 571 | return spmc_ffa_error_return(handle, |
| 572 | FFA_ERROR_INVALID_PARAMETER); |
| 573 | } |
| 574 | |
| 575 | /* |
| 576 | * Get the execution context of the SP that invoked FFA_MSG_WAIT. |
| 577 | */ |
| 578 | idx = get_ec_index(sp); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 579 | if (sp->runtime_el == S_EL0) { |
| 580 | spin_lock(&sp->rt_state_lock); |
| 581 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 582 | |
| 583 | /* Ensure SP execution context was in the right runtime model. */ |
| 584 | if (sp->ec[idx].rt_model == RT_MODEL_DIR_REQ) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 585 | if (sp->runtime_el == S_EL0) { |
| 586 | spin_unlock(&sp->rt_state_lock); |
| 587 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 588 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 589 | } |
| 590 | |
| 591 | /* Sanity check the state is being tracked correctly in the SPMC. */ |
| 592 | assert(sp->ec[idx].rt_state == RT_STATE_RUNNING); |
| 593 | |
| 594 | /* |
| 595 | * Perform a synchronous exit if the partition was initialising. The |
| 596 | * state is updated after the exit. |
| 597 | */ |
| 598 | if (sp->ec[idx].rt_model == RT_MODEL_INIT) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 599 | if (sp->runtime_el == S_EL0) { |
| 600 | spin_unlock(&sp->rt_state_lock); |
| 601 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 602 | spmc_sp_synchronous_exit(&sp->ec[idx], x4); |
| 603 | /* Should not get here */ |
| 604 | panic(); |
| 605 | } |
| 606 | |
| 607 | /* Update the state of the SP execution context. */ |
| 608 | sp->ec[idx].rt_state = RT_STATE_WAITING; |
| 609 | |
| 610 | /* Resume normal world if a secure interrupt was handled. */ |
| 611 | if (sp->ec[idx].rt_model == RT_MODEL_INTR) { |
| 612 | /* FFA_MSG_WAIT can only be called from the secure world. */ |
| 613 | unsigned int secure_state_in = SECURE; |
| 614 | unsigned int secure_state_out = NON_SECURE; |
| 615 | |
| 616 | cm_el1_sysregs_context_save(secure_state_in); |
| 617 | cm_el1_sysregs_context_restore(secure_state_out); |
| 618 | cm_set_next_eret_context(secure_state_out); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 619 | |
| 620 | if (sp->runtime_el == S_EL0) { |
| 621 | spin_unlock(&sp->rt_state_lock); |
| 622 | } |
| 623 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 624 | SMC_RET0(cm_get_context(secure_state_out)); |
| 625 | } |
| 626 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 627 | /* Protect the runtime state of a S-EL0 SP with a lock. */ |
| 628 | if (sp->runtime_el == S_EL0) { |
| 629 | spin_unlock(&sp->rt_state_lock); |
| 630 | } |
| 631 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 632 | /* Forward the response to the Normal world. */ |
| 633 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 634 | handle, cookie, flags, FFA_NWD_ID); |
| 635 | } |
| 636 | |
Marc Bonnici | b4e9984 | 2021-12-10 09:21:56 +0000 | [diff] [blame] | 637 | static uint64_t ffa_error_handler(uint32_t smc_fid, |
| 638 | bool secure_origin, |
| 639 | uint64_t x1, |
| 640 | uint64_t x2, |
| 641 | uint64_t x3, |
| 642 | uint64_t x4, |
| 643 | void *cookie, |
| 644 | void *handle, |
| 645 | uint64_t flags) |
| 646 | { |
| 647 | struct secure_partition_desc *sp; |
| 648 | unsigned int idx; |
| 649 | |
| 650 | /* Check that the response did not originate from the Normal world. */ |
| 651 | if (!secure_origin) { |
| 652 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 653 | } |
| 654 | |
| 655 | /* Get the descriptor of the SP that invoked FFA_ERROR. */ |
| 656 | sp = spmc_get_current_sp_ctx(); |
| 657 | if (sp == NULL) { |
| 658 | return spmc_ffa_error_return(handle, |
| 659 | FFA_ERROR_INVALID_PARAMETER); |
| 660 | } |
| 661 | |
| 662 | /* Get the execution context of the SP that invoked FFA_ERROR. */ |
| 663 | idx = get_ec_index(sp); |
| 664 | |
| 665 | /* |
| 666 | * We only expect FFA_ERROR to be received during SP initialisation |
| 667 | * otherwise this is an invalid call. |
| 668 | */ |
| 669 | if (sp->ec[idx].rt_model == RT_MODEL_INIT) { |
| 670 | ERROR("SP 0x%x failed to initialize.\n", sp->sp_id); |
| 671 | spmc_sp_synchronous_exit(&sp->ec[idx], x2); |
| 672 | /* Should not get here. */ |
| 673 | panic(); |
| 674 | } |
| 675 | |
| 676 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 677 | } |
| 678 | |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 679 | static uint64_t ffa_version_handler(uint32_t smc_fid, |
| 680 | bool secure_origin, |
| 681 | uint64_t x1, |
| 682 | uint64_t x2, |
| 683 | uint64_t x3, |
| 684 | uint64_t x4, |
| 685 | void *cookie, |
| 686 | void *handle, |
| 687 | uint64_t flags) |
| 688 | { |
| 689 | uint32_t requested_version = x1 & FFA_VERSION_MASK; |
| 690 | |
| 691 | if (requested_version & FFA_VERSION_BIT31_MASK) { |
| 692 | /* Invalid encoding, return an error. */ |
| 693 | SMC_RET1(handle, FFA_ERROR_NOT_SUPPORTED); |
| 694 | /* Execution stops here. */ |
| 695 | } |
| 696 | |
| 697 | /* Determine the caller to store the requested version. */ |
| 698 | if (secure_origin) { |
| 699 | /* |
| 700 | * Ensure that the SP is reporting the same version as |
| 701 | * specified in its manifest. If these do not match there is |
| 702 | * something wrong with the SP. |
| 703 | * TODO: Should we abort the SP? For now assert this is not |
| 704 | * case. |
| 705 | */ |
| 706 | assert(requested_version == |
| 707 | spmc_get_current_sp_ctx()->ffa_version); |
| 708 | } else { |
| 709 | /* |
| 710 | * If this is called by the normal world, record this |
| 711 | * information in its descriptor. |
| 712 | */ |
| 713 | spmc_get_hyp_ctx()->ffa_version = requested_version; |
| 714 | } |
| 715 | |
| 716 | SMC_RET1(handle, MAKE_FFA_VERSION(FFA_VERSION_MAJOR, |
| 717 | FFA_VERSION_MINOR)); |
| 718 | } |
| 719 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 720 | /******************************************************************************* |
Marc Bonnici | 73fbe8f | 2021-12-09 11:32:30 +0000 | [diff] [blame] | 721 | * Helper function to obtain the FF-A version of the calling partition. |
| 722 | ******************************************************************************/ |
| 723 | uint32_t get_partition_ffa_version(bool secure_origin) |
| 724 | { |
| 725 | if (secure_origin) { |
| 726 | return spmc_get_current_sp_ctx()->ffa_version; |
| 727 | } else { |
| 728 | return spmc_get_hyp_ctx()->ffa_version; |
| 729 | } |
| 730 | } |
| 731 | |
Marc Bonnici | 0cf1a15 | 2021-08-25 12:09:37 +0100 | [diff] [blame] | 732 | static uint64_t rxtx_map_handler(uint32_t smc_fid, |
| 733 | bool secure_origin, |
| 734 | uint64_t x1, |
| 735 | uint64_t x2, |
| 736 | uint64_t x3, |
| 737 | uint64_t x4, |
| 738 | void *cookie, |
| 739 | void *handle, |
| 740 | uint64_t flags) |
| 741 | { |
| 742 | int ret; |
| 743 | uint32_t error_code; |
| 744 | uint32_t mem_atts = secure_origin ? MT_SECURE : MT_NS; |
| 745 | struct mailbox *mbox; |
| 746 | uintptr_t tx_address = x1; |
| 747 | uintptr_t rx_address = x2; |
| 748 | uint32_t page_count = x3 & FFA_RXTX_PAGE_COUNT_MASK; /* Bits [5:0] */ |
| 749 | uint32_t buf_size = page_count * FFA_PAGE_SIZE; |
| 750 | |
| 751 | /* |
| 752 | * The SPMC does not support mapping of VM RX/TX pairs to facilitate |
| 753 | * indirect messaging with SPs. Check if the Hypervisor has invoked this |
| 754 | * ABI on behalf of a VM and reject it if this is the case. |
| 755 | */ |
| 756 | if (tx_address == 0 || rx_address == 0) { |
| 757 | WARN("Mapping RX/TX Buffers on behalf of VM not supported.\n"); |
| 758 | return spmc_ffa_error_return(handle, |
| 759 | FFA_ERROR_INVALID_PARAMETER); |
| 760 | } |
| 761 | |
| 762 | /* Ensure the specified buffers are not the same. */ |
| 763 | if (tx_address == rx_address) { |
| 764 | WARN("TX Buffer must not be the same as RX Buffer.\n"); |
| 765 | return spmc_ffa_error_return(handle, |
| 766 | FFA_ERROR_INVALID_PARAMETER); |
| 767 | } |
| 768 | |
| 769 | /* Ensure the buffer size is not 0. */ |
| 770 | if (buf_size == 0U) { |
| 771 | WARN("Buffer size must not be 0\n"); |
| 772 | return spmc_ffa_error_return(handle, |
| 773 | FFA_ERROR_INVALID_PARAMETER); |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | * Ensure the buffer size is a multiple of the translation granule size |
| 778 | * in TF-A. |
| 779 | */ |
| 780 | if (buf_size % PAGE_SIZE != 0U) { |
| 781 | WARN("Buffer size must be aligned to translation granule.\n"); |
| 782 | return spmc_ffa_error_return(handle, |
| 783 | FFA_ERROR_INVALID_PARAMETER); |
| 784 | } |
| 785 | |
| 786 | /* Obtain the RX/TX buffer pair descriptor. */ |
| 787 | mbox = spmc_get_mbox_desc(secure_origin); |
| 788 | |
| 789 | spin_lock(&mbox->lock); |
| 790 | |
| 791 | /* Check if buffers have already been mapped. */ |
| 792 | if (mbox->rx_buffer != 0 || mbox->tx_buffer != 0) { |
| 793 | WARN("RX/TX Buffers already mapped (%p/%p)\n", |
| 794 | (void *) mbox->rx_buffer, (void *)mbox->tx_buffer); |
| 795 | error_code = FFA_ERROR_DENIED; |
| 796 | goto err; |
| 797 | } |
| 798 | |
| 799 | /* memmap the TX buffer as read only. */ |
| 800 | ret = mmap_add_dynamic_region(tx_address, /* PA */ |
| 801 | tx_address, /* VA */ |
| 802 | buf_size, /* size */ |
| 803 | mem_atts | MT_RO_DATA); /* attrs */ |
| 804 | if (ret != 0) { |
| 805 | /* Return the correct error code. */ |
| 806 | error_code = (ret == -ENOMEM) ? FFA_ERROR_NO_MEMORY : |
| 807 | FFA_ERROR_INVALID_PARAMETER; |
| 808 | WARN("Unable to map TX buffer: %d\n", error_code); |
| 809 | goto err; |
| 810 | } |
| 811 | |
| 812 | /* memmap the RX buffer as read write. */ |
| 813 | ret = mmap_add_dynamic_region(rx_address, /* PA */ |
| 814 | rx_address, /* VA */ |
| 815 | buf_size, /* size */ |
| 816 | mem_atts | MT_RW_DATA); /* attrs */ |
| 817 | |
| 818 | if (ret != 0) { |
| 819 | error_code = (ret == -ENOMEM) ? FFA_ERROR_NO_MEMORY : |
| 820 | FFA_ERROR_INVALID_PARAMETER; |
| 821 | WARN("Unable to map RX buffer: %d\n", error_code); |
| 822 | /* Unmap the TX buffer again. */ |
| 823 | mmap_remove_dynamic_region(tx_address, buf_size); |
| 824 | goto err; |
| 825 | } |
| 826 | |
| 827 | mbox->tx_buffer = (void *) tx_address; |
| 828 | mbox->rx_buffer = (void *) rx_address; |
| 829 | mbox->rxtx_page_count = page_count; |
| 830 | spin_unlock(&mbox->lock); |
| 831 | |
| 832 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 833 | /* Execution stops here. */ |
| 834 | err: |
| 835 | spin_unlock(&mbox->lock); |
| 836 | return spmc_ffa_error_return(handle, error_code); |
| 837 | } |
| 838 | |
| 839 | static uint64_t rxtx_unmap_handler(uint32_t smc_fid, |
| 840 | bool secure_origin, |
| 841 | uint64_t x1, |
| 842 | uint64_t x2, |
| 843 | uint64_t x3, |
| 844 | uint64_t x4, |
| 845 | void *cookie, |
| 846 | void *handle, |
| 847 | uint64_t flags) |
| 848 | { |
| 849 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 850 | uint32_t buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 851 | |
| 852 | /* |
| 853 | * The SPMC does not support mapping of VM RX/TX pairs to facilitate |
| 854 | * indirect messaging with SPs. Check if the Hypervisor has invoked this |
| 855 | * ABI on behalf of a VM and reject it if this is the case. |
| 856 | */ |
| 857 | if (x1 != 0UL) { |
| 858 | return spmc_ffa_error_return(handle, |
| 859 | FFA_ERROR_INVALID_PARAMETER); |
| 860 | } |
| 861 | |
| 862 | spin_lock(&mbox->lock); |
| 863 | |
| 864 | /* Check if buffers are currently mapped. */ |
| 865 | if (mbox->rx_buffer == 0 || mbox->tx_buffer == 0) { |
| 866 | spin_unlock(&mbox->lock); |
| 867 | return spmc_ffa_error_return(handle, |
| 868 | FFA_ERROR_INVALID_PARAMETER); |
| 869 | } |
| 870 | |
| 871 | /* Unmap RX Buffer */ |
| 872 | if (mmap_remove_dynamic_region((uintptr_t) mbox->rx_buffer, |
| 873 | buf_size) != 0) { |
| 874 | WARN("Unable to unmap RX buffer!\n"); |
| 875 | } |
| 876 | |
| 877 | mbox->rx_buffer = 0; |
| 878 | |
| 879 | /* Unmap TX Buffer */ |
| 880 | if (mmap_remove_dynamic_region((uintptr_t) mbox->tx_buffer, |
| 881 | buf_size) != 0) { |
| 882 | WARN("Unable to unmap TX buffer!\n"); |
| 883 | } |
| 884 | |
| 885 | mbox->tx_buffer = 0; |
| 886 | mbox->rxtx_page_count = 0; |
| 887 | |
| 888 | spin_unlock(&mbox->lock); |
| 889 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 890 | } |
| 891 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 892 | /* |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 893 | * Helper function to populate the properties field of a Partition Info Get |
| 894 | * descriptor. |
| 895 | */ |
| 896 | static uint32_t |
| 897 | partition_info_get_populate_properties(uint32_t sp_properties, |
| 898 | enum sp_execution_state sp_ec_state) |
| 899 | { |
| 900 | uint32_t properties = sp_properties; |
| 901 | uint32_t ec_state; |
| 902 | |
| 903 | /* Determine the execution state of the SP. */ |
| 904 | ec_state = sp_ec_state == SP_STATE_AARCH64 ? |
| 905 | FFA_PARTITION_INFO_GET_AARCH64_STATE : |
| 906 | FFA_PARTITION_INFO_GET_AARCH32_STATE; |
| 907 | |
| 908 | properties |= ec_state << FFA_PARTITION_INFO_GET_EXEC_STATE_SHIFT; |
| 909 | |
| 910 | return properties; |
| 911 | } |
| 912 | |
| 913 | /* |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 914 | * Collate the partition information in a v1.1 partition information |
| 915 | * descriptor format, this will be converter later if required. |
| 916 | */ |
| 917 | static int partition_info_get_handler_v1_1(uint32_t *uuid, |
| 918 | struct ffa_partition_info_v1_1 |
| 919 | *partitions, |
| 920 | uint32_t max_partitions, |
| 921 | uint32_t *partition_count) |
| 922 | { |
| 923 | uint32_t index; |
| 924 | struct ffa_partition_info_v1_1 *desc; |
| 925 | bool null_uuid = is_null_uuid(uuid); |
| 926 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 927 | |
| 928 | /* Deal with Logical Partitions. */ |
| 929 | for (index = 0U; index < EL3_LP_DESCS_COUNT; index++) { |
| 930 | if (null_uuid || uuid_match(uuid, el3_lp_descs[index].uuid)) { |
| 931 | /* Found a matching UUID, populate appropriately. */ |
| 932 | if (*partition_count >= max_partitions) { |
| 933 | return FFA_ERROR_NO_MEMORY; |
| 934 | } |
| 935 | |
| 936 | desc = &partitions[*partition_count]; |
| 937 | desc->ep_id = el3_lp_descs[index].sp_id; |
| 938 | desc->execution_ctx_count = PLATFORM_CORE_COUNT; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 939 | /* LSPs must be AArch64. */ |
| 940 | desc->properties = |
| 941 | partition_info_get_populate_properties( |
| 942 | el3_lp_descs[index].properties, |
| 943 | SP_STATE_AARCH64); |
| 944 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 945 | if (null_uuid) { |
| 946 | copy_uuid(desc->uuid, el3_lp_descs[index].uuid); |
| 947 | } |
| 948 | (*partition_count)++; |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | /* Deal with physical SP's. */ |
| 953 | for (index = 0U; index < SECURE_PARTITION_COUNT; index++) { |
| 954 | if (null_uuid || uuid_match(uuid, sp_desc[index].uuid)) { |
| 955 | /* Found a matching UUID, populate appropriately. */ |
| 956 | if (*partition_count >= max_partitions) { |
| 957 | return FFA_ERROR_NO_MEMORY; |
| 958 | } |
| 959 | |
| 960 | desc = &partitions[*partition_count]; |
| 961 | desc->ep_id = sp_desc[index].sp_id; |
| 962 | /* |
| 963 | * Execution context count must match No. cores for |
| 964 | * S-EL1 SPs. |
| 965 | */ |
| 966 | desc->execution_ctx_count = PLATFORM_CORE_COUNT; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 967 | desc->properties = |
| 968 | partition_info_get_populate_properties( |
| 969 | sp_desc[index].properties, |
| 970 | sp_desc[index].execution_state); |
| 971 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 972 | if (null_uuid) { |
| 973 | copy_uuid(desc->uuid, sp_desc[index].uuid); |
| 974 | } |
| 975 | (*partition_count)++; |
| 976 | } |
| 977 | } |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | /* |
| 982 | * Handle the case where that caller only wants the count of partitions |
| 983 | * matching a given UUID and does not want the corresponding descriptors |
| 984 | * populated. |
| 985 | */ |
| 986 | static uint32_t partition_info_get_handler_count_only(uint32_t *uuid) |
| 987 | { |
| 988 | uint32_t index = 0; |
| 989 | uint32_t partition_count = 0; |
| 990 | bool null_uuid = is_null_uuid(uuid); |
| 991 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 992 | |
| 993 | /* Deal with Logical Partitions. */ |
| 994 | for (index = 0U; index < EL3_LP_DESCS_COUNT; index++) { |
| 995 | if (null_uuid || |
| 996 | uuid_match(uuid, el3_lp_descs[index].uuid)) { |
| 997 | (partition_count)++; |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | /* Deal with physical SP's. */ |
| 1002 | for (index = 0U; index < SECURE_PARTITION_COUNT; index++) { |
| 1003 | if (null_uuid || uuid_match(uuid, sp_desc[index].uuid)) { |
| 1004 | (partition_count)++; |
| 1005 | } |
| 1006 | } |
| 1007 | return partition_count; |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * If the caller of the PARTITION_INFO_GET ABI was a v1.0 caller, populate |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 1012 | * the corresponding descriptor format from the v1.1 descriptor array. |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1013 | */ |
| 1014 | static uint64_t partition_info_populate_v1_0(struct ffa_partition_info_v1_1 |
| 1015 | *partitions, |
| 1016 | struct mailbox *mbox, |
| 1017 | int partition_count) |
| 1018 | { |
| 1019 | uint32_t index; |
| 1020 | uint32_t buf_size; |
| 1021 | uint32_t descriptor_size; |
| 1022 | struct ffa_partition_info_v1_0 *v1_0_partitions = |
| 1023 | (struct ffa_partition_info_v1_0 *) mbox->rx_buffer; |
| 1024 | |
| 1025 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1026 | descriptor_size = partition_count * |
| 1027 | sizeof(struct ffa_partition_info_v1_0); |
| 1028 | |
| 1029 | if (descriptor_size > buf_size) { |
| 1030 | return FFA_ERROR_NO_MEMORY; |
| 1031 | } |
| 1032 | |
| 1033 | for (index = 0U; index < partition_count; index++) { |
| 1034 | v1_0_partitions[index].ep_id = partitions[index].ep_id; |
| 1035 | v1_0_partitions[index].execution_ctx_count = |
| 1036 | partitions[index].execution_ctx_count; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 1037 | /* Only report v1.0 properties. */ |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1038 | v1_0_partitions[index].properties = |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 1039 | (partitions[index].properties & |
| 1040 | FFA_PARTITION_INFO_GET_PROPERTIES_V1_0_MASK); |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1041 | } |
| 1042 | return 0; |
| 1043 | } |
| 1044 | |
| 1045 | /* |
| 1046 | * Main handler for FFA_PARTITION_INFO_GET which supports both FF-A v1.1 and |
| 1047 | * v1.0 implementations. |
| 1048 | */ |
| 1049 | static uint64_t partition_info_get_handler(uint32_t smc_fid, |
| 1050 | bool secure_origin, |
| 1051 | uint64_t x1, |
| 1052 | uint64_t x2, |
| 1053 | uint64_t x3, |
| 1054 | uint64_t x4, |
| 1055 | void *cookie, |
| 1056 | void *handle, |
| 1057 | uint64_t flags) |
| 1058 | { |
| 1059 | int ret; |
| 1060 | uint32_t partition_count = 0; |
| 1061 | uint32_t size = 0; |
| 1062 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| 1063 | struct mailbox *mbox; |
| 1064 | uint64_t info_get_flags; |
| 1065 | bool count_only; |
| 1066 | uint32_t uuid[4]; |
| 1067 | |
| 1068 | uuid[0] = x1; |
| 1069 | uuid[1] = x2; |
| 1070 | uuid[2] = x3; |
| 1071 | uuid[3] = x4; |
| 1072 | |
| 1073 | /* Determine if the Partition descriptors should be populated. */ |
| 1074 | info_get_flags = SMC_GET_GP(handle, CTX_GPREG_X5); |
| 1075 | count_only = (info_get_flags & FFA_PARTITION_INFO_GET_COUNT_FLAG_MASK); |
| 1076 | |
| 1077 | /* Handle the case where we don't need to populate the descriptors. */ |
| 1078 | if (count_only) { |
| 1079 | partition_count = partition_info_get_handler_count_only(uuid); |
| 1080 | if (partition_count == 0) { |
| 1081 | return spmc_ffa_error_return(handle, |
| 1082 | FFA_ERROR_INVALID_PARAMETER); |
| 1083 | } |
| 1084 | } else { |
| 1085 | struct ffa_partition_info_v1_1 partitions[MAX_SP_LP_PARTITIONS]; |
| 1086 | |
| 1087 | /* |
| 1088 | * Handle the case where the partition descriptors are required, |
| 1089 | * check we have the buffers available and populate the |
| 1090 | * appropriate structure version. |
| 1091 | */ |
| 1092 | |
| 1093 | /* Obtain the v1.1 format of the descriptors. */ |
| 1094 | ret = partition_info_get_handler_v1_1(uuid, partitions, |
| 1095 | MAX_SP_LP_PARTITIONS, |
| 1096 | &partition_count); |
| 1097 | |
| 1098 | /* Check if an error occurred during discovery. */ |
| 1099 | if (ret != 0) { |
| 1100 | goto err; |
| 1101 | } |
| 1102 | |
| 1103 | /* If we didn't find any matches the UUID is unknown. */ |
| 1104 | if (partition_count == 0) { |
| 1105 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1106 | goto err; |
| 1107 | } |
| 1108 | |
| 1109 | /* Obtain the partition mailbox RX/TX buffer pair descriptor. */ |
| 1110 | mbox = spmc_get_mbox_desc(secure_origin); |
| 1111 | |
| 1112 | /* |
| 1113 | * If the caller has not bothered registering its RX/TX pair |
| 1114 | * then return an error code. |
| 1115 | */ |
| 1116 | spin_lock(&mbox->lock); |
| 1117 | if (mbox->rx_buffer == NULL) { |
| 1118 | ret = FFA_ERROR_BUSY; |
| 1119 | goto err_unlock; |
| 1120 | } |
| 1121 | |
| 1122 | /* Ensure the RX buffer is currently free. */ |
| 1123 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1124 | ret = FFA_ERROR_BUSY; |
| 1125 | goto err_unlock; |
| 1126 | } |
| 1127 | |
| 1128 | /* Zero the RX buffer before populating. */ |
| 1129 | (void)memset(mbox->rx_buffer, 0, |
| 1130 | mbox->rxtx_page_count * FFA_PAGE_SIZE); |
| 1131 | |
| 1132 | /* |
| 1133 | * Depending on the FF-A version of the requesting partition |
| 1134 | * we may need to convert to a v1.0 format otherwise we can copy |
| 1135 | * directly. |
| 1136 | */ |
| 1137 | if (ffa_version == MAKE_FFA_VERSION(U(1), U(0))) { |
| 1138 | ret = partition_info_populate_v1_0(partitions, |
| 1139 | mbox, |
| 1140 | partition_count); |
| 1141 | if (ret != 0) { |
| 1142 | goto err_unlock; |
| 1143 | } |
| 1144 | } else { |
| 1145 | uint32_t buf_size = mbox->rxtx_page_count * |
| 1146 | FFA_PAGE_SIZE; |
| 1147 | |
| 1148 | /* Ensure the descriptor will fit in the buffer. */ |
| 1149 | size = sizeof(struct ffa_partition_info_v1_1); |
| 1150 | if (partition_count * size > buf_size) { |
| 1151 | ret = FFA_ERROR_NO_MEMORY; |
| 1152 | goto err_unlock; |
| 1153 | } |
| 1154 | memcpy(mbox->rx_buffer, partitions, |
| 1155 | partition_count * size); |
| 1156 | } |
| 1157 | |
| 1158 | mbox->state = MAILBOX_STATE_FULL; |
| 1159 | spin_unlock(&mbox->lock); |
| 1160 | } |
| 1161 | SMC_RET4(handle, FFA_SUCCESS_SMC32, 0, partition_count, size); |
| 1162 | |
| 1163 | err_unlock: |
| 1164 | spin_unlock(&mbox->lock); |
| 1165 | err: |
| 1166 | return spmc_ffa_error_return(handle, ret); |
| 1167 | } |
| 1168 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1169 | static uint64_t ffa_feature_success(void *handle, uint32_t arg2) |
| 1170 | { |
| 1171 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0, arg2); |
| 1172 | } |
| 1173 | |
| 1174 | static uint64_t ffa_features_retrieve_request(bool secure_origin, |
| 1175 | uint32_t input_properties, |
| 1176 | void *handle) |
| 1177 | { |
| 1178 | /* |
| 1179 | * If we're called by the normal world we don't support any |
| 1180 | * additional features. |
| 1181 | */ |
| 1182 | if (!secure_origin) { |
| 1183 | if ((input_properties & FFA_FEATURES_RET_REQ_NS_BIT) != 0U) { |
| 1184 | return spmc_ffa_error_return(handle, |
| 1185 | FFA_ERROR_NOT_SUPPORTED); |
| 1186 | } |
| 1187 | |
| 1188 | } else { |
| 1189 | struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
| 1190 | /* |
| 1191 | * If v1.1 the NS bit must be set otherwise it is an invalid |
| 1192 | * call. If v1.0 check and store whether the SP has requested |
| 1193 | * the use of the NS bit. |
| 1194 | */ |
| 1195 | if (sp->ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 1196 | if ((input_properties & |
| 1197 | FFA_FEATURES_RET_REQ_NS_BIT) == 0U) { |
| 1198 | return spmc_ffa_error_return(handle, |
| 1199 | FFA_ERROR_NOT_SUPPORTED); |
| 1200 | } |
| 1201 | return ffa_feature_success(handle, |
| 1202 | FFA_FEATURES_RET_REQ_NS_BIT); |
| 1203 | } else { |
| 1204 | sp->ns_bit_requested = (input_properties & |
| 1205 | FFA_FEATURES_RET_REQ_NS_BIT) != |
| 1206 | 0U; |
| 1207 | } |
| 1208 | if (sp->ns_bit_requested) { |
| 1209 | return ffa_feature_success(handle, |
| 1210 | FFA_FEATURES_RET_REQ_NS_BIT); |
| 1211 | } |
| 1212 | } |
| 1213 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1214 | } |
| 1215 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1216 | static uint64_t ffa_features_handler(uint32_t smc_fid, |
| 1217 | bool secure_origin, |
| 1218 | uint64_t x1, |
| 1219 | uint64_t x2, |
| 1220 | uint64_t x3, |
| 1221 | uint64_t x4, |
| 1222 | void *cookie, |
| 1223 | void *handle, |
| 1224 | uint64_t flags) |
| 1225 | { |
| 1226 | uint32_t function_id = (uint32_t) x1; |
| 1227 | uint32_t input_properties = (uint32_t) x2; |
| 1228 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1229 | /* Check if a Feature ID was requested. */ |
| 1230 | if ((function_id & FFA_FEATURES_BIT31_MASK) == 0U) { |
| 1231 | /* We currently don't support any additional features. */ |
| 1232 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1233 | } |
| 1234 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1235 | /* |
| 1236 | * Handle the cases where we have separate handlers due to additional |
| 1237 | * properties. |
| 1238 | */ |
| 1239 | switch (function_id) { |
| 1240 | case FFA_MEM_RETRIEVE_REQ_SMC32: |
| 1241 | case FFA_MEM_RETRIEVE_REQ_SMC64: |
| 1242 | return ffa_features_retrieve_request(secure_origin, |
| 1243 | input_properties, |
| 1244 | handle); |
| 1245 | } |
| 1246 | |
| 1247 | /* |
| 1248 | * We don't currently support additional input properties for these |
| 1249 | * other ABIs therefore ensure this value is set to 0. |
| 1250 | */ |
| 1251 | if (input_properties != 0U) { |
| 1252 | return spmc_ffa_error_return(handle, |
| 1253 | FFA_ERROR_NOT_SUPPORTED); |
| 1254 | } |
| 1255 | |
| 1256 | /* Report if any other FF-A ABI is supported. */ |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1257 | switch (function_id) { |
| 1258 | /* Supported features from both worlds. */ |
| 1259 | case FFA_ERROR: |
| 1260 | case FFA_SUCCESS_SMC32: |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 1261 | case FFA_INTERRUPT: |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 1262 | case FFA_SPM_ID_GET: |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 1263 | case FFA_ID_GET: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1264 | case FFA_FEATURES: |
| 1265 | case FFA_VERSION: |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 1266 | case FFA_RX_RELEASE: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1267 | case FFA_MSG_SEND_DIRECT_REQ_SMC32: |
| 1268 | case FFA_MSG_SEND_DIRECT_REQ_SMC64: |
| 1269 | case FFA_PARTITION_INFO_GET: |
| 1270 | case FFA_RXTX_MAP_SMC32: |
| 1271 | case FFA_RXTX_MAP_SMC64: |
| 1272 | case FFA_RXTX_UNMAP: |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1273 | case FFA_MEM_FRAG_TX: |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1274 | case FFA_MSG_RUN: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1275 | |
| 1276 | /* |
| 1277 | * We are relying on the fact that the other registers |
| 1278 | * will be set to 0 as these values align with the |
| 1279 | * currently implemented features of the SPMC. If this |
| 1280 | * changes this function must be extended to handle |
| 1281 | * reporting the additional functionality. |
| 1282 | */ |
| 1283 | |
| 1284 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1285 | /* Execution stops here. */ |
| 1286 | |
| 1287 | /* Supported ABIs only from the secure world. */ |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1288 | case FFA_SECONDARY_EP_REGISTER_SMC64: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1289 | case FFA_MSG_SEND_DIRECT_RESP_SMC32: |
| 1290 | case FFA_MSG_SEND_DIRECT_RESP_SMC64: |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1291 | case FFA_MEM_RELINQUISH: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1292 | case FFA_MSG_WAIT: |
| 1293 | |
| 1294 | if (!secure_origin) { |
| 1295 | return spmc_ffa_error_return(handle, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1296 | FFA_ERROR_NOT_SUPPORTED); |
| 1297 | } |
| 1298 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1299 | /* Execution stops here. */ |
| 1300 | |
| 1301 | /* Supported features only from the normal world. */ |
| 1302 | case FFA_MEM_SHARE_SMC32: |
| 1303 | case FFA_MEM_SHARE_SMC64: |
| 1304 | case FFA_MEM_LEND_SMC32: |
| 1305 | case FFA_MEM_LEND_SMC64: |
| 1306 | case FFA_MEM_RECLAIM: |
| 1307 | case FFA_MEM_FRAG_RX: |
| 1308 | |
| 1309 | if (secure_origin) { |
| 1310 | return spmc_ffa_error_return(handle, |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1311 | FFA_ERROR_NOT_SUPPORTED); |
| 1312 | } |
| 1313 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1314 | /* Execution stops here. */ |
| 1315 | |
| 1316 | default: |
| 1317 | return spmc_ffa_error_return(handle, |
| 1318 | FFA_ERROR_NOT_SUPPORTED); |
| 1319 | } |
| 1320 | } |
| 1321 | |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 1322 | static uint64_t ffa_id_get_handler(uint32_t smc_fid, |
| 1323 | bool secure_origin, |
| 1324 | uint64_t x1, |
| 1325 | uint64_t x2, |
| 1326 | uint64_t x3, |
| 1327 | uint64_t x4, |
| 1328 | void *cookie, |
| 1329 | void *handle, |
| 1330 | uint64_t flags) |
| 1331 | { |
| 1332 | if (secure_origin) { |
| 1333 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, |
| 1334 | spmc_get_current_sp_ctx()->sp_id); |
| 1335 | } else { |
| 1336 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, |
| 1337 | spmc_get_hyp_ctx()->ns_ep_id); |
| 1338 | } |
| 1339 | } |
| 1340 | |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 1341 | /* |
| 1342 | * Enable an SP to query the ID assigned to the SPMC. |
| 1343 | */ |
| 1344 | static uint64_t ffa_spm_id_get_handler(uint32_t smc_fid, |
| 1345 | bool secure_origin, |
| 1346 | uint64_t x1, |
| 1347 | uint64_t x2, |
| 1348 | uint64_t x3, |
| 1349 | uint64_t x4, |
| 1350 | void *cookie, |
| 1351 | void *handle, |
| 1352 | uint64_t flags) |
| 1353 | { |
| 1354 | assert(x1 == 0UL); |
| 1355 | assert(x2 == 0UL); |
| 1356 | assert(x3 == 0UL); |
| 1357 | assert(x4 == 0UL); |
| 1358 | assert(SMC_GET_GP(handle, CTX_GPREG_X5) == 0UL); |
| 1359 | assert(SMC_GET_GP(handle, CTX_GPREG_X6) == 0UL); |
| 1360 | assert(SMC_GET_GP(handle, CTX_GPREG_X7) == 0UL); |
| 1361 | |
| 1362 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, FFA_SPMC_ID); |
| 1363 | } |
| 1364 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1365 | static uint64_t ffa_run_handler(uint32_t smc_fid, |
| 1366 | bool secure_origin, |
| 1367 | uint64_t x1, |
| 1368 | uint64_t x2, |
| 1369 | uint64_t x3, |
| 1370 | uint64_t x4, |
| 1371 | void *cookie, |
| 1372 | void *handle, |
| 1373 | uint64_t flags) |
| 1374 | { |
| 1375 | struct secure_partition_desc *sp; |
| 1376 | uint16_t target_id = FFA_RUN_EP_ID(x1); |
| 1377 | uint16_t vcpu_id = FFA_RUN_VCPU_ID(x1); |
| 1378 | unsigned int idx; |
| 1379 | unsigned int *rt_state; |
| 1380 | unsigned int *rt_model; |
| 1381 | |
| 1382 | /* Can only be called from the normal world. */ |
| 1383 | if (secure_origin) { |
| 1384 | ERROR("FFA_RUN can only be called from NWd.\n"); |
| 1385 | return spmc_ffa_error_return(handle, |
| 1386 | FFA_ERROR_INVALID_PARAMETER); |
| 1387 | } |
| 1388 | |
| 1389 | /* Cannot run a Normal world partition. */ |
| 1390 | if (ffa_is_normal_world_id(target_id)) { |
| 1391 | ERROR("Cannot run a NWd partition (0x%x).\n", target_id); |
| 1392 | return spmc_ffa_error_return(handle, |
| 1393 | FFA_ERROR_INVALID_PARAMETER); |
| 1394 | } |
| 1395 | |
| 1396 | /* Check that the target SP exists. */ |
| 1397 | sp = spmc_get_sp_ctx(target_id); |
| 1398 | ERROR("Unknown partition ID (0x%x).\n", target_id); |
| 1399 | if (sp == NULL) { |
| 1400 | return spmc_ffa_error_return(handle, |
| 1401 | FFA_ERROR_INVALID_PARAMETER); |
| 1402 | } |
| 1403 | |
| 1404 | idx = get_ec_index(sp); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1405 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1406 | if (idx != vcpu_id) { |
| 1407 | ERROR("Cannot run vcpu %d != %d.\n", idx, vcpu_id); |
| 1408 | return spmc_ffa_error_return(handle, |
| 1409 | FFA_ERROR_INVALID_PARAMETER); |
| 1410 | } |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1411 | if (sp->runtime_el == S_EL0) { |
| 1412 | spin_lock(&sp->rt_state_lock); |
| 1413 | } |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1414 | rt_state = &((sp->ec[idx]).rt_state); |
| 1415 | rt_model = &((sp->ec[idx]).rt_model); |
| 1416 | if (*rt_state == RT_STATE_RUNNING) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1417 | if (sp->runtime_el == S_EL0) { |
| 1418 | spin_unlock(&sp->rt_state_lock); |
| 1419 | } |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1420 | ERROR("Partition (0x%x) is already running.\n", target_id); |
| 1421 | return spmc_ffa_error_return(handle, FFA_ERROR_BUSY); |
| 1422 | } |
| 1423 | |
| 1424 | /* |
| 1425 | * Sanity check that if the execution context was not waiting then it |
| 1426 | * was either in the direct request or the run partition runtime model. |
| 1427 | */ |
| 1428 | if (*rt_state == RT_STATE_PREEMPTED || *rt_state == RT_STATE_BLOCKED) { |
| 1429 | assert(*rt_model == RT_MODEL_RUN || |
| 1430 | *rt_model == RT_MODEL_DIR_REQ); |
| 1431 | } |
| 1432 | |
| 1433 | /* |
| 1434 | * If the context was waiting then update the partition runtime model. |
| 1435 | */ |
| 1436 | if (*rt_state == RT_STATE_WAITING) { |
| 1437 | *rt_model = RT_MODEL_RUN; |
| 1438 | } |
| 1439 | |
| 1440 | /* |
| 1441 | * Forward the request to the correct SP vCPU after updating |
| 1442 | * its state. |
| 1443 | */ |
| 1444 | *rt_state = RT_STATE_RUNNING; |
| 1445 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1446 | if (sp->runtime_el == S_EL0) { |
| 1447 | spin_unlock(&sp->rt_state_lock); |
| 1448 | } |
| 1449 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1450 | return spmc_smc_return(smc_fid, secure_origin, x1, 0, 0, 0, |
| 1451 | handle, cookie, flags, target_id); |
| 1452 | } |
| 1453 | |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 1454 | static uint64_t rx_release_handler(uint32_t smc_fid, |
| 1455 | bool secure_origin, |
| 1456 | uint64_t x1, |
| 1457 | uint64_t x2, |
| 1458 | uint64_t x3, |
| 1459 | uint64_t x4, |
| 1460 | void *cookie, |
| 1461 | void *handle, |
| 1462 | uint64_t flags) |
| 1463 | { |
| 1464 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1465 | |
| 1466 | spin_lock(&mbox->lock); |
| 1467 | |
| 1468 | if (mbox->state != MAILBOX_STATE_FULL) { |
| 1469 | spin_unlock(&mbox->lock); |
| 1470 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1471 | } |
| 1472 | |
| 1473 | mbox->state = MAILBOX_STATE_EMPTY; |
| 1474 | spin_unlock(&mbox->lock); |
| 1475 | |
| 1476 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1477 | } |
| 1478 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1479 | /* |
| 1480 | * Perform initial validation on the provided secondary entry point. |
| 1481 | * For now ensure it does not lie within the BL31 Image or the SP's |
| 1482 | * RX/TX buffers as these are mapped within EL3. |
| 1483 | * TODO: perform validation for additional invalid memory regions. |
| 1484 | */ |
| 1485 | static int validate_secondary_ep(uintptr_t ep, struct secure_partition_desc *sp) |
| 1486 | { |
| 1487 | struct mailbox *mb; |
| 1488 | uintptr_t buffer_size; |
| 1489 | uintptr_t sp_rx_buffer; |
| 1490 | uintptr_t sp_tx_buffer; |
| 1491 | uintptr_t sp_rx_buffer_limit; |
| 1492 | uintptr_t sp_tx_buffer_limit; |
| 1493 | |
| 1494 | mb = &sp->mailbox; |
| 1495 | buffer_size = (uintptr_t) (mb->rxtx_page_count * FFA_PAGE_SIZE); |
| 1496 | sp_rx_buffer = (uintptr_t) mb->rx_buffer; |
| 1497 | sp_tx_buffer = (uintptr_t) mb->tx_buffer; |
| 1498 | sp_rx_buffer_limit = sp_rx_buffer + buffer_size; |
| 1499 | sp_tx_buffer_limit = sp_tx_buffer + buffer_size; |
| 1500 | |
| 1501 | /* |
| 1502 | * Check if the entry point lies within BL31, or the |
| 1503 | * SP's RX or TX buffer. |
| 1504 | */ |
| 1505 | if ((ep >= BL31_BASE && ep < BL31_LIMIT) || |
| 1506 | (ep >= sp_rx_buffer && ep < sp_rx_buffer_limit) || |
| 1507 | (ep >= sp_tx_buffer && ep < sp_tx_buffer_limit)) { |
| 1508 | return -EINVAL; |
| 1509 | } |
| 1510 | return 0; |
| 1511 | } |
| 1512 | |
Marc Bonnici | 73fbe8f | 2021-12-09 11:32:30 +0000 | [diff] [blame] | 1513 | /******************************************************************************* |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1514 | * This function handles the FFA_SECONDARY_EP_REGISTER SMC to allow an SP to |
| 1515 | * register an entry point for initialization during a secondary cold boot. |
| 1516 | ******************************************************************************/ |
| 1517 | static uint64_t ffa_sec_ep_register_handler(uint32_t smc_fid, |
| 1518 | bool secure_origin, |
| 1519 | uint64_t x1, |
| 1520 | uint64_t x2, |
| 1521 | uint64_t x3, |
| 1522 | uint64_t x4, |
| 1523 | void *cookie, |
| 1524 | void *handle, |
| 1525 | uint64_t flags) |
| 1526 | { |
| 1527 | struct secure_partition_desc *sp; |
| 1528 | struct sp_exec_ctx *sp_ctx; |
| 1529 | |
| 1530 | /* This request cannot originate from the Normal world. */ |
| 1531 | if (!secure_origin) { |
| 1532 | WARN("%s: Can only be called from SWd.\n", __func__); |
| 1533 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1534 | } |
| 1535 | |
| 1536 | /* Get the context of the current SP. */ |
| 1537 | sp = spmc_get_current_sp_ctx(); |
| 1538 | if (sp == NULL) { |
| 1539 | WARN("%s: Cannot find SP context.\n", __func__); |
| 1540 | return spmc_ffa_error_return(handle, |
| 1541 | FFA_ERROR_INVALID_PARAMETER); |
| 1542 | } |
| 1543 | |
| 1544 | /* Only an S-EL1 SP should be invoking this ABI. */ |
| 1545 | if (sp->runtime_el != S_EL1) { |
| 1546 | WARN("%s: Can only be called for a S-EL1 SP.\n", __func__); |
| 1547 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1548 | } |
| 1549 | |
| 1550 | /* Ensure the SP is in its initialization state. */ |
| 1551 | sp_ctx = spmc_get_sp_ec(sp); |
| 1552 | if (sp_ctx->rt_model != RT_MODEL_INIT) { |
| 1553 | WARN("%s: Can only be called during SP initialization.\n", |
| 1554 | __func__); |
| 1555 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1556 | } |
| 1557 | |
| 1558 | /* Perform initial validation of the secondary entry point. */ |
| 1559 | if (validate_secondary_ep(x1, sp)) { |
| 1560 | WARN("%s: Invalid entry point provided (0x%lx).\n", |
| 1561 | __func__, x1); |
| 1562 | return spmc_ffa_error_return(handle, |
| 1563 | FFA_ERROR_INVALID_PARAMETER); |
| 1564 | } |
| 1565 | |
| 1566 | /* |
| 1567 | * Update the secondary entrypoint in SP context. |
| 1568 | * We don't need a lock here as during partition initialization there |
| 1569 | * will only be a single core online. |
| 1570 | */ |
| 1571 | sp->secondary_ep = x1; |
| 1572 | VERBOSE("%s: 0x%lx\n", __func__, sp->secondary_ep); |
| 1573 | |
| 1574 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1575 | } |
| 1576 | |
| 1577 | /******************************************************************************* |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 1578 | * Permissions are encoded using a different format in the FFA_MEM_PERM_* ABIs |
| 1579 | * than in the Trusted Firmware, where the mmap_attr_t enum type is used. This |
| 1580 | * function converts a permission value from the FF-A format to the mmap_attr_t |
| 1581 | * format by setting MT_RW/MT_RO, MT_USER/MT_PRIVILEGED and |
| 1582 | * MT_EXECUTE/MT_EXECUTE_NEVER. The other fields are left as 0 because they are |
| 1583 | * ignored by the function xlat_change_mem_attributes_ctx(). |
| 1584 | ******************************************************************************/ |
| 1585 | static unsigned int ffa_perm_to_mmap_perm(unsigned int perms) |
| 1586 | { |
| 1587 | unsigned int tf_attr = 0U; |
| 1588 | unsigned int access; |
| 1589 | |
| 1590 | /* Deal with data access permissions first. */ |
| 1591 | access = (perms & FFA_MEM_PERM_DATA_MASK) >> FFA_MEM_PERM_DATA_SHIFT; |
| 1592 | |
| 1593 | switch (access) { |
| 1594 | case FFA_MEM_PERM_DATA_RW: |
| 1595 | /* Return 0 if the execute is set with RW. */ |
| 1596 | if ((perms & FFA_MEM_PERM_INST_NON_EXEC) != 0) { |
| 1597 | tf_attr |= MT_RW | MT_USER | MT_EXECUTE_NEVER; |
| 1598 | } |
| 1599 | break; |
| 1600 | |
| 1601 | case FFA_MEM_PERM_DATA_RO: |
| 1602 | tf_attr |= MT_RO | MT_USER; |
| 1603 | /* Deal with the instruction access permissions next. */ |
| 1604 | if ((perms & FFA_MEM_PERM_INST_NON_EXEC) == 0) { |
| 1605 | tf_attr |= MT_EXECUTE; |
| 1606 | } else { |
| 1607 | tf_attr |= MT_EXECUTE_NEVER; |
| 1608 | } |
| 1609 | break; |
| 1610 | |
| 1611 | case FFA_MEM_PERM_DATA_NA: |
| 1612 | default: |
| 1613 | return tf_attr; |
| 1614 | } |
| 1615 | |
| 1616 | return tf_attr; |
| 1617 | } |
| 1618 | |
| 1619 | /******************************************************************************* |
| 1620 | * Handler to set the permissions of a set of contiguous pages of a S-EL0 SP |
| 1621 | ******************************************************************************/ |
| 1622 | static uint64_t ffa_mem_perm_set_handler(uint32_t smc_fid, |
| 1623 | bool secure_origin, |
| 1624 | uint64_t x1, |
| 1625 | uint64_t x2, |
| 1626 | uint64_t x3, |
| 1627 | uint64_t x4, |
| 1628 | void *cookie, |
| 1629 | void *handle, |
| 1630 | uint64_t flags) |
| 1631 | { |
| 1632 | struct secure_partition_desc *sp; |
| 1633 | unsigned int idx; |
| 1634 | uintptr_t base_va = (uintptr_t) x1; |
| 1635 | size_t size = (size_t)(x2 * PAGE_SIZE); |
| 1636 | uint32_t tf_attr; |
| 1637 | int ret; |
| 1638 | |
| 1639 | /* This request cannot originate from the Normal world. */ |
| 1640 | if (!secure_origin) { |
| 1641 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1642 | } |
| 1643 | |
| 1644 | if (size == 0) { |
| 1645 | return spmc_ffa_error_return(handle, |
| 1646 | FFA_ERROR_INVALID_PARAMETER); |
| 1647 | } |
| 1648 | |
| 1649 | /* Get the context of the current SP. */ |
| 1650 | sp = spmc_get_current_sp_ctx(); |
| 1651 | if (sp == NULL) { |
| 1652 | return spmc_ffa_error_return(handle, |
| 1653 | FFA_ERROR_INVALID_PARAMETER); |
| 1654 | } |
| 1655 | |
| 1656 | /* A S-EL1 SP has no business invoking this ABI. */ |
| 1657 | if (sp->runtime_el == S_EL1) { |
| 1658 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1659 | } |
| 1660 | |
| 1661 | if ((x3 & ~((uint64_t)FFA_MEM_PERM_MASK)) != 0) { |
| 1662 | return spmc_ffa_error_return(handle, |
| 1663 | FFA_ERROR_INVALID_PARAMETER); |
| 1664 | } |
| 1665 | |
| 1666 | /* Get the execution context of the calling SP. */ |
| 1667 | idx = get_ec_index(sp); |
| 1668 | |
| 1669 | /* |
| 1670 | * Ensure that the S-EL0 SP is initialising itself. We do not need to |
| 1671 | * synchronise this operation through a spinlock since a S-EL0 SP is UP |
| 1672 | * and can only be initialising on this cpu. |
| 1673 | */ |
| 1674 | if (sp->ec[idx].rt_model != RT_MODEL_INIT) { |
| 1675 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1676 | } |
| 1677 | |
| 1678 | VERBOSE("Setting memory permissions:\n"); |
| 1679 | VERBOSE(" Start address : 0x%lx\n", base_va); |
| 1680 | VERBOSE(" Number of pages: %lu (%zu bytes)\n", x2, size); |
| 1681 | VERBOSE(" Attributes : 0x%x\n", (uint32_t)x3); |
| 1682 | |
| 1683 | /* Convert inbound permissions to TF-A permission attributes */ |
| 1684 | tf_attr = ffa_perm_to_mmap_perm((unsigned int)x3); |
| 1685 | if (tf_attr == 0U) { |
| 1686 | return spmc_ffa_error_return(handle, |
| 1687 | FFA_ERROR_INVALID_PARAMETER); |
| 1688 | } |
| 1689 | |
| 1690 | /* Request the change in permissions */ |
| 1691 | ret = xlat_change_mem_attributes_ctx(sp->xlat_ctx_handle, |
| 1692 | base_va, size, tf_attr); |
| 1693 | if (ret != 0) { |
| 1694 | return spmc_ffa_error_return(handle, |
| 1695 | FFA_ERROR_INVALID_PARAMETER); |
| 1696 | } |
| 1697 | |
| 1698 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1699 | } |
| 1700 | |
| 1701 | /******************************************************************************* |
| 1702 | * Permissions are encoded using a different format in the FFA_MEM_PERM_* ABIs |
| 1703 | * than in the Trusted Firmware, where the mmap_attr_t enum type is used. This |
| 1704 | * function converts a permission value from the mmap_attr_t format to the FF-A |
| 1705 | * format. |
| 1706 | ******************************************************************************/ |
| 1707 | static unsigned int mmap_perm_to_ffa_perm(unsigned int attr) |
| 1708 | { |
| 1709 | unsigned int perms = 0U; |
| 1710 | unsigned int data_access; |
| 1711 | |
| 1712 | if ((attr & MT_USER) == 0) { |
| 1713 | /* No access from EL0. */ |
| 1714 | data_access = FFA_MEM_PERM_DATA_NA; |
| 1715 | } else { |
| 1716 | if ((attr & MT_RW) != 0) { |
| 1717 | data_access = FFA_MEM_PERM_DATA_RW; |
| 1718 | } else { |
| 1719 | data_access = FFA_MEM_PERM_DATA_RO; |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | perms |= (data_access & FFA_MEM_PERM_DATA_MASK) |
| 1724 | << FFA_MEM_PERM_DATA_SHIFT; |
| 1725 | |
| 1726 | if ((attr & MT_EXECUTE_NEVER) != 0U) { |
| 1727 | perms |= FFA_MEM_PERM_INST_NON_EXEC; |
| 1728 | } |
| 1729 | |
| 1730 | return perms; |
| 1731 | } |
| 1732 | |
| 1733 | /******************************************************************************* |
| 1734 | * Handler to get the permissions of a set of contiguous pages of a S-EL0 SP |
| 1735 | ******************************************************************************/ |
| 1736 | static uint64_t ffa_mem_perm_get_handler(uint32_t smc_fid, |
| 1737 | bool secure_origin, |
| 1738 | uint64_t x1, |
| 1739 | uint64_t x2, |
| 1740 | uint64_t x3, |
| 1741 | uint64_t x4, |
| 1742 | void *cookie, |
| 1743 | void *handle, |
| 1744 | uint64_t flags) |
| 1745 | { |
| 1746 | struct secure_partition_desc *sp; |
| 1747 | unsigned int idx; |
| 1748 | uintptr_t base_va = (uintptr_t)x1; |
| 1749 | uint32_t tf_attr = 0; |
| 1750 | int ret; |
| 1751 | |
| 1752 | /* This request cannot originate from the Normal world. */ |
| 1753 | if (!secure_origin) { |
| 1754 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1755 | } |
| 1756 | |
| 1757 | /* Get the context of the current SP. */ |
| 1758 | sp = spmc_get_current_sp_ctx(); |
| 1759 | if (sp == NULL) { |
| 1760 | return spmc_ffa_error_return(handle, |
| 1761 | FFA_ERROR_INVALID_PARAMETER); |
| 1762 | } |
| 1763 | |
| 1764 | /* A S-EL1 SP has no business invoking this ABI. */ |
| 1765 | if (sp->runtime_el == S_EL1) { |
| 1766 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1767 | } |
| 1768 | |
| 1769 | /* Get the execution context of the calling SP. */ |
| 1770 | idx = get_ec_index(sp); |
| 1771 | |
| 1772 | /* |
| 1773 | * Ensure that the S-EL0 SP is initialising itself. We do not need to |
| 1774 | * synchronise this operation through a spinlock since a S-EL0 SP is UP |
| 1775 | * and can only be initialising on this cpu. |
| 1776 | */ |
| 1777 | if (sp->ec[idx].rt_model != RT_MODEL_INIT) { |
| 1778 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1779 | } |
| 1780 | |
| 1781 | /* Request the permissions */ |
| 1782 | ret = xlat_get_mem_attributes_ctx(sp->xlat_ctx_handle, base_va, &tf_attr); |
| 1783 | if (ret != 0) { |
| 1784 | return spmc_ffa_error_return(handle, |
| 1785 | FFA_ERROR_INVALID_PARAMETER); |
| 1786 | } |
| 1787 | |
| 1788 | /* Convert TF-A permission to FF-A permissions attributes. */ |
| 1789 | x2 = mmap_perm_to_ffa_perm(tf_attr); |
| 1790 | |
| 1791 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0, x2); |
| 1792 | } |
| 1793 | |
| 1794 | /******************************************************************************* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1795 | * This function will parse the Secure Partition Manifest. From manifest, it |
| 1796 | * will fetch details for preparing Secure partition image context and secure |
| 1797 | * partition image boot arguments if any. |
| 1798 | ******************************************************************************/ |
| 1799 | static int sp_manifest_parse(void *sp_manifest, int offset, |
| 1800 | struct secure_partition_desc *sp, |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 1801 | entry_point_info_t *ep_info, |
| 1802 | int32_t *boot_info_reg) |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1803 | { |
| 1804 | int32_t ret, node; |
| 1805 | uint32_t config_32; |
| 1806 | |
| 1807 | /* |
| 1808 | * Look for the mandatory fields that are expected to be present in |
| 1809 | * the SP manifests. |
| 1810 | */ |
| 1811 | node = fdt_path_offset(sp_manifest, "/"); |
| 1812 | if (node < 0) { |
| 1813 | ERROR("Did not find root node.\n"); |
| 1814 | return node; |
| 1815 | } |
| 1816 | |
Marc Bonnici | 21e644d | 2021-08-24 11:31:52 +0100 | [diff] [blame] | 1817 | ret = fdt_read_uint32_array(sp_manifest, node, "uuid", |
| 1818 | ARRAY_SIZE(sp->uuid), sp->uuid); |
| 1819 | if (ret != 0) { |
| 1820 | ERROR("Missing Secure Partition UUID.\n"); |
| 1821 | return ret; |
| 1822 | } |
| 1823 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1824 | ret = fdt_read_uint32(sp_manifest, node, "exception-level", &config_32); |
| 1825 | if (ret != 0) { |
| 1826 | ERROR("Missing SP Exception Level information.\n"); |
| 1827 | return ret; |
| 1828 | } |
| 1829 | |
| 1830 | sp->runtime_el = config_32; |
| 1831 | |
| 1832 | ret = fdt_read_uint32(sp_manifest, node, "ffa-version", &config_32); |
| 1833 | if (ret != 0) { |
| 1834 | ERROR("Missing Secure Partition FF-A Version.\n"); |
| 1835 | return ret; |
| 1836 | } |
| 1837 | |
| 1838 | sp->ffa_version = config_32; |
| 1839 | |
| 1840 | ret = fdt_read_uint32(sp_manifest, node, "execution-state", &config_32); |
| 1841 | if (ret != 0) { |
| 1842 | ERROR("Missing Secure Partition Execution State.\n"); |
| 1843 | return ret; |
| 1844 | } |
| 1845 | |
| 1846 | sp->execution_state = config_32; |
| 1847 | |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1848 | ret = fdt_read_uint32(sp_manifest, node, |
Marc Bonnici | f524489 | 2021-12-09 18:34:02 +0000 | [diff] [blame] | 1849 | "messaging-method", &config_32); |
| 1850 | if (ret != 0) { |
| 1851 | ERROR("Missing Secure Partition messaging method.\n"); |
| 1852 | return ret; |
| 1853 | } |
| 1854 | |
| 1855 | /* Validate this entry, we currently only support direct messaging. */ |
| 1856 | if ((config_32 & ~(FFA_PARTITION_DIRECT_REQ_RECV | |
| 1857 | FFA_PARTITION_DIRECT_REQ_SEND)) != 0U) { |
| 1858 | WARN("Invalid Secure Partition messaging method (0x%x)\n", |
| 1859 | config_32); |
| 1860 | return -EINVAL; |
| 1861 | } |
| 1862 | |
| 1863 | sp->properties = config_32; |
| 1864 | |
| 1865 | ret = fdt_read_uint32(sp_manifest, node, |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1866 | "execution-ctx-count", &config_32); |
| 1867 | |
| 1868 | if (ret != 0) { |
| 1869 | ERROR("Missing SP Execution Context Count.\n"); |
| 1870 | return ret; |
| 1871 | } |
| 1872 | |
| 1873 | /* |
| 1874 | * Ensure this field is set correctly in the manifest however |
| 1875 | * since this is currently a hardcoded value for S-EL1 partitions |
| 1876 | * we don't need to save it here, just validate. |
| 1877 | */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 1878 | if ((sp->runtime_el == S_EL1) && (config_32 != PLATFORM_CORE_COUNT)) { |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1879 | ERROR("SP Execution Context Count (%u) must be %u.\n", |
| 1880 | config_32, PLATFORM_CORE_COUNT); |
| 1881 | return -EINVAL; |
| 1882 | } |
| 1883 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1884 | /* |
| 1885 | * Look for the optional fields that are expected to be present in |
| 1886 | * an SP manifest. |
| 1887 | */ |
| 1888 | ret = fdt_read_uint32(sp_manifest, node, "id", &config_32); |
| 1889 | if (ret != 0) { |
| 1890 | WARN("Missing Secure Partition ID.\n"); |
| 1891 | } else { |
| 1892 | if (!is_ffa_secure_id_valid(config_32)) { |
| 1893 | ERROR("Invalid Secure Partition ID (0x%x).\n", |
| 1894 | config_32); |
| 1895 | return -EINVAL; |
| 1896 | } |
| 1897 | sp->sp_id = config_32; |
| 1898 | } |
| 1899 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1900 | ret = fdt_read_uint32(sp_manifest, node, |
| 1901 | "power-management-messages", &config_32); |
| 1902 | if (ret != 0) { |
| 1903 | WARN("Missing Power Management Messages entry.\n"); |
| 1904 | } else { |
Nishant Sharma | a3ddb3b | 2022-04-28 14:28:44 +0100 | [diff] [blame] | 1905 | if ((sp->runtime_el == S_EL0) && (config_32 != 0)) { |
| 1906 | ERROR("Power messages not supported for S-EL0 SP\n"); |
| 1907 | return -EINVAL; |
| 1908 | } |
| 1909 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1910 | /* |
| 1911 | * Ensure only the currently supported power messages have |
| 1912 | * been requested. |
| 1913 | */ |
| 1914 | if (config_32 & ~(FFA_PM_MSG_SUB_CPU_OFF | |
| 1915 | FFA_PM_MSG_SUB_CPU_SUSPEND | |
| 1916 | FFA_PM_MSG_SUB_CPU_SUSPEND_RESUME)) { |
| 1917 | ERROR("Requested unsupported PM messages (%x)\n", |
| 1918 | config_32); |
| 1919 | return -EINVAL; |
| 1920 | } |
| 1921 | sp->pwr_mgmt_msgs = config_32; |
| 1922 | } |
| 1923 | |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 1924 | ret = fdt_read_uint32(sp_manifest, node, |
| 1925 | "gp-register-num", &config_32); |
| 1926 | if (ret != 0) { |
| 1927 | WARN("Missing boot information register.\n"); |
| 1928 | } else { |
| 1929 | /* Check if a register number between 0-3 is specified. */ |
| 1930 | if (config_32 < 4) { |
| 1931 | *boot_info_reg = config_32; |
| 1932 | } else { |
| 1933 | WARN("Incorrect boot information register (%u).\n", |
| 1934 | config_32); |
| 1935 | } |
| 1936 | } |
| 1937 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1938 | return 0; |
| 1939 | } |
| 1940 | |
| 1941 | /******************************************************************************* |
| 1942 | * This function gets the Secure Partition Manifest base and maps the manifest |
| 1943 | * region. |
| 1944 | * Currently only one Secure Partition manifest is considered which is used to |
| 1945 | * prepare the context for the single Secure Partition. |
| 1946 | ******************************************************************************/ |
| 1947 | static int find_and_prepare_sp_context(void) |
| 1948 | { |
| 1949 | void *sp_manifest; |
| 1950 | uintptr_t manifest_base; |
| 1951 | uintptr_t manifest_base_align; |
| 1952 | entry_point_info_t *next_image_ep_info; |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 1953 | int32_t ret, boot_info_reg = -1; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1954 | struct secure_partition_desc *sp; |
| 1955 | |
| 1956 | next_image_ep_info = bl31_plat_get_next_image_ep_info(SECURE); |
| 1957 | if (next_image_ep_info == NULL) { |
| 1958 | WARN("No Secure Partition image provided by BL2.\n"); |
| 1959 | return -ENOENT; |
| 1960 | } |
| 1961 | |
| 1962 | sp_manifest = (void *)next_image_ep_info->args.arg0; |
| 1963 | if (sp_manifest == NULL) { |
| 1964 | WARN("Secure Partition manifest absent.\n"); |
| 1965 | return -ENOENT; |
| 1966 | } |
| 1967 | |
| 1968 | manifest_base = (uintptr_t)sp_manifest; |
| 1969 | manifest_base_align = page_align(manifest_base, DOWN); |
| 1970 | |
| 1971 | /* |
| 1972 | * Map the secure partition manifest region in the EL3 translation |
| 1973 | * regime. |
| 1974 | * Map an area equal to (2 * PAGE_SIZE) for now. During manifest base |
| 1975 | * alignment the region of 1 PAGE_SIZE from manifest align base may |
| 1976 | * not completely accommodate the secure partition manifest region. |
| 1977 | */ |
| 1978 | ret = mmap_add_dynamic_region((unsigned long long)manifest_base_align, |
| 1979 | manifest_base_align, |
| 1980 | PAGE_SIZE * 2, |
| 1981 | MT_RO_DATA); |
| 1982 | if (ret != 0) { |
| 1983 | ERROR("Error while mapping SP manifest (%d).\n", ret); |
| 1984 | return ret; |
| 1985 | } |
| 1986 | |
| 1987 | ret = fdt_node_offset_by_compatible(sp_manifest, -1, |
| 1988 | "arm,ffa-manifest-1.0"); |
| 1989 | if (ret < 0) { |
| 1990 | ERROR("Error happened in SP manifest reading.\n"); |
| 1991 | return -EINVAL; |
| 1992 | } |
| 1993 | |
| 1994 | /* |
| 1995 | * Store the size of the manifest so that it can be used later to pass |
| 1996 | * the manifest as boot information later. |
| 1997 | */ |
| 1998 | next_image_ep_info->args.arg1 = fdt_totalsize(sp_manifest); |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 1999 | INFO("Manifest adr = %lx , size = %lu bytes\n", manifest_base, |
| 2000 | next_image_ep_info->args.arg1); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2001 | |
| 2002 | /* |
| 2003 | * Select an SP descriptor for initialising the partition's execution |
| 2004 | * context on the primary CPU. |
| 2005 | */ |
| 2006 | sp = spmc_get_current_sp_ctx(); |
| 2007 | |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2008 | #if SPMC_AT_EL3_SEL0_SP |
| 2009 | /* Assign translation tables context. */ |
| 2010 | sp_desc->xlat_ctx_handle = spm_get_sp_xlat_context(); |
| 2011 | |
| 2012 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2013 | /* Initialize entry point information for the SP */ |
| 2014 | SET_PARAM_HEAD(next_image_ep_info, PARAM_EP, VERSION_1, |
| 2015 | SECURE | EP_ST_ENABLE); |
| 2016 | |
| 2017 | /* Parse the SP manifest. */ |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 2018 | ret = sp_manifest_parse(sp_manifest, ret, sp, next_image_ep_info, |
| 2019 | &boot_info_reg); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2020 | if (ret != 0) { |
| 2021 | ERROR("Error in Secure Partition manifest parsing.\n"); |
| 2022 | return ret; |
| 2023 | } |
| 2024 | |
| 2025 | /* Check that the runtime EL in the manifest was correct. */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2026 | if (sp->runtime_el != S_EL0 && sp->runtime_el != S_EL1) { |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2027 | ERROR("Unexpected runtime EL: %d\n", sp->runtime_el); |
| 2028 | return -EINVAL; |
| 2029 | } |
| 2030 | |
| 2031 | /* Perform any common initialisation. */ |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 2032 | spmc_sp_common_setup(sp, next_image_ep_info, boot_info_reg); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2033 | |
| 2034 | /* Perform any initialisation specific to S-EL1 SPs. */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2035 | if (sp->runtime_el == S_EL1) { |
| 2036 | spmc_el1_sp_setup(sp, next_image_ep_info); |
| 2037 | } |
| 2038 | |
| 2039 | #if SPMC_AT_EL3_SEL0_SP |
| 2040 | /* Setup spsr in endpoint info for common context management routine. */ |
| 2041 | if (sp->runtime_el == S_EL0) { |
| 2042 | spmc_el0_sp_spsr_setup(next_image_ep_info); |
| 2043 | } |
| 2044 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2045 | |
| 2046 | /* Initialize the SP context with the required ep info. */ |
| 2047 | spmc_sp_common_ep_commit(sp, next_image_ep_info); |
| 2048 | |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2049 | #if SPMC_AT_EL3_SEL0_SP |
| 2050 | /* |
| 2051 | * Perform any initialisation specific to S-EL0 not set by common |
| 2052 | * context management routine. |
| 2053 | */ |
| 2054 | if (sp->runtime_el == S_EL0) { |
Nishant Sharma | 6817bdb | 2022-04-28 11:52:07 +0100 | [diff] [blame] | 2055 | spmc_el0_sp_setup(sp, boot_info_reg, sp_manifest); |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2056 | } |
| 2057 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2058 | return 0; |
| 2059 | } |
| 2060 | |
| 2061 | /******************************************************************************* |
| 2062 | * This function takes an SP context pointer and performs a synchronous entry |
| 2063 | * into it. |
| 2064 | ******************************************************************************/ |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 2065 | static int32_t logical_sp_init(void) |
| 2066 | { |
| 2067 | int32_t rc = 0; |
| 2068 | struct el3_lp_desc *el3_lp_descs; |
| 2069 | |
| 2070 | /* Perform initial validation of the Logical Partitions. */ |
| 2071 | rc = el3_sp_desc_validate(); |
| 2072 | if (rc != 0) { |
| 2073 | ERROR("Logical Partition validation failed!\n"); |
| 2074 | return rc; |
| 2075 | } |
| 2076 | |
| 2077 | el3_lp_descs = get_el3_lp_array(); |
| 2078 | |
| 2079 | INFO("Logical Secure Partition init start.\n"); |
| 2080 | for (unsigned int i = 0U; i < EL3_LP_DESCS_COUNT; i++) { |
| 2081 | rc = el3_lp_descs[i].init(); |
| 2082 | if (rc != 0) { |
| 2083 | ERROR("Logical SP (0x%x) Failed to Initialize\n", |
| 2084 | el3_lp_descs[i].sp_id); |
| 2085 | return rc; |
| 2086 | } |
| 2087 | VERBOSE("Logical SP (0x%x) Initialized\n", |
| 2088 | el3_lp_descs[i].sp_id); |
| 2089 | } |
| 2090 | |
| 2091 | INFO("Logical Secure Partition init completed.\n"); |
| 2092 | |
| 2093 | return rc; |
| 2094 | } |
| 2095 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2096 | uint64_t spmc_sp_synchronous_entry(struct sp_exec_ctx *ec) |
| 2097 | { |
| 2098 | uint64_t rc; |
| 2099 | |
| 2100 | assert(ec != NULL); |
| 2101 | |
| 2102 | /* Assign the context of the SP to this CPU */ |
| 2103 | cm_set_context(&(ec->cpu_ctx), SECURE); |
| 2104 | |
| 2105 | /* Restore the context assigned above */ |
| 2106 | cm_el1_sysregs_context_restore(SECURE); |
| 2107 | cm_set_next_eret_context(SECURE); |
| 2108 | |
| 2109 | /* Invalidate TLBs at EL1. */ |
| 2110 | tlbivmalle1(); |
| 2111 | dsbish(); |
| 2112 | |
| 2113 | /* Enter Secure Partition */ |
| 2114 | rc = spm_secure_partition_enter(&ec->c_rt_ctx); |
| 2115 | |
| 2116 | /* Save secure state */ |
| 2117 | cm_el1_sysregs_context_save(SECURE); |
| 2118 | |
| 2119 | return rc; |
| 2120 | } |
| 2121 | |
| 2122 | /******************************************************************************* |
| 2123 | * SPMC Helper Functions. |
| 2124 | ******************************************************************************/ |
| 2125 | static int32_t sp_init(void) |
| 2126 | { |
| 2127 | uint64_t rc; |
| 2128 | struct secure_partition_desc *sp; |
| 2129 | struct sp_exec_ctx *ec; |
| 2130 | |
| 2131 | sp = spmc_get_current_sp_ctx(); |
| 2132 | ec = spmc_get_sp_ec(sp); |
| 2133 | ec->rt_model = RT_MODEL_INIT; |
| 2134 | ec->rt_state = RT_STATE_RUNNING; |
| 2135 | |
| 2136 | INFO("Secure Partition (0x%x) init start.\n", sp->sp_id); |
| 2137 | |
| 2138 | rc = spmc_sp_synchronous_entry(ec); |
| 2139 | if (rc != 0) { |
| 2140 | /* Indicate SP init was not successful. */ |
| 2141 | ERROR("SP (0x%x) failed to initialize (%lu).\n", |
| 2142 | sp->sp_id, rc); |
| 2143 | return 0; |
| 2144 | } |
| 2145 | |
| 2146 | ec->rt_state = RT_STATE_WAITING; |
| 2147 | INFO("Secure Partition initialized.\n"); |
| 2148 | |
| 2149 | return 1; |
| 2150 | } |
| 2151 | |
| 2152 | static void initalize_sp_descs(void) |
| 2153 | { |
| 2154 | struct secure_partition_desc *sp; |
| 2155 | |
| 2156 | for (unsigned int i = 0U; i < SECURE_PARTITION_COUNT; i++) { |
| 2157 | sp = &sp_desc[i]; |
| 2158 | sp->sp_id = INV_SP_ID; |
Marc Bonnici | ecc460a | 2021-09-02 13:18:41 +0100 | [diff] [blame] | 2159 | sp->mailbox.rx_buffer = NULL; |
| 2160 | sp->mailbox.tx_buffer = NULL; |
| 2161 | sp->mailbox.state = MAILBOX_STATE_EMPTY; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2162 | sp->secondary_ep = 0; |
| 2163 | } |
| 2164 | } |
| 2165 | |
| 2166 | static void initalize_ns_ep_descs(void) |
| 2167 | { |
| 2168 | struct ns_endpoint_desc *ns_ep; |
| 2169 | |
| 2170 | for (unsigned int i = 0U; i < NS_PARTITION_COUNT; i++) { |
| 2171 | ns_ep = &ns_ep_desc[i]; |
| 2172 | /* |
| 2173 | * Clashes with the Hypervisor ID but will not be a |
| 2174 | * problem in practice. |
| 2175 | */ |
| 2176 | ns_ep->ns_ep_id = 0; |
| 2177 | ns_ep->ffa_version = 0; |
Marc Bonnici | ecc460a | 2021-09-02 13:18:41 +0100 | [diff] [blame] | 2178 | ns_ep->mailbox.rx_buffer = NULL; |
| 2179 | ns_ep->mailbox.tx_buffer = NULL; |
| 2180 | ns_ep->mailbox.state = MAILBOX_STATE_EMPTY; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2181 | } |
| 2182 | } |
| 2183 | |
| 2184 | /******************************************************************************* |
Marc Bonnici | 1c33cc3 | 2021-11-29 17:57:03 +0000 | [diff] [blame] | 2185 | * Initialize SPMC attributes for the SPMD. |
| 2186 | ******************************************************************************/ |
| 2187 | void spmc_populate_attrs(spmc_manifest_attribute_t *spmc_attrs) |
| 2188 | { |
| 2189 | spmc_attrs->major_version = FFA_VERSION_MAJOR; |
| 2190 | spmc_attrs->minor_version = FFA_VERSION_MINOR; |
| 2191 | spmc_attrs->exec_state = MODE_RW_64; |
| 2192 | spmc_attrs->spmc_id = FFA_SPMC_ID; |
| 2193 | } |
| 2194 | |
| 2195 | /******************************************************************************* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2196 | * Initialize contexts of all Secure Partitions. |
| 2197 | ******************************************************************************/ |
| 2198 | int32_t spmc_setup(void) |
| 2199 | { |
| 2200 | int32_t ret; |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2201 | uint32_t flags; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2202 | |
| 2203 | /* Initialize endpoint descriptors */ |
| 2204 | initalize_sp_descs(); |
| 2205 | initalize_ns_ep_descs(); |
| 2206 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 2207 | /* |
| 2208 | * Retrieve the information of the datastore for tracking shared memory |
| 2209 | * requests allocated by platform code and zero the region if available. |
| 2210 | */ |
| 2211 | ret = plat_spmc_shmem_datastore_get(&spmc_shmem_obj_state.data, |
| 2212 | &spmc_shmem_obj_state.data_size); |
| 2213 | if (ret != 0) { |
| 2214 | ERROR("Failed to obtain memory descriptor backing store!\n"); |
| 2215 | return ret; |
| 2216 | } |
| 2217 | memset(spmc_shmem_obj_state.data, 0, spmc_shmem_obj_state.data_size); |
| 2218 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 2219 | /* Setup logical SPs. */ |
| 2220 | ret = logical_sp_init(); |
| 2221 | if (ret != 0) { |
| 2222 | ERROR("Failed to initialize Logical Partitions.\n"); |
| 2223 | return ret; |
| 2224 | } |
| 2225 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2226 | /* Perform physical SP setup. */ |
| 2227 | |
| 2228 | /* Disable MMU at EL1 (initialized by BL2) */ |
| 2229 | disable_mmu_icache_el1(); |
| 2230 | |
| 2231 | /* Initialize context of the SP */ |
| 2232 | INFO("Secure Partition context setup start.\n"); |
| 2233 | |
| 2234 | ret = find_and_prepare_sp_context(); |
| 2235 | if (ret != 0) { |
| 2236 | ERROR("Error in SP finding and context preparation.\n"); |
| 2237 | return ret; |
| 2238 | } |
| 2239 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 2240 | /* Register power management hooks with PSCI */ |
| 2241 | psci_register_spd_pm_hook(&spmc_pm); |
| 2242 | |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2243 | /* |
| 2244 | * Register an interrupt handler for S-EL1 interrupts |
| 2245 | * when generated during code executing in the |
| 2246 | * non-secure state. |
| 2247 | */ |
| 2248 | flags = 0; |
| 2249 | set_interrupt_rm_flag(flags, NON_SECURE); |
| 2250 | ret = register_interrupt_type_handler(INTR_TYPE_S_EL1, |
| 2251 | spmc_sp_interrupt_handler, |
| 2252 | flags); |
| 2253 | if (ret != 0) { |
| 2254 | ERROR("Failed to register interrupt handler! (%d)\n", ret); |
| 2255 | panic(); |
| 2256 | } |
| 2257 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2258 | /* Register init function for deferred init. */ |
| 2259 | bl31_register_bl32_init(&sp_init); |
| 2260 | |
| 2261 | INFO("Secure Partition setup done.\n"); |
| 2262 | |
| 2263 | return 0; |
| 2264 | } |
| 2265 | |
| 2266 | /******************************************************************************* |
| 2267 | * Secure Partition Manager SMC handler. |
| 2268 | ******************************************************************************/ |
| 2269 | uint64_t spmc_smc_handler(uint32_t smc_fid, |
| 2270 | bool secure_origin, |
| 2271 | uint64_t x1, |
| 2272 | uint64_t x2, |
| 2273 | uint64_t x3, |
| 2274 | uint64_t x4, |
| 2275 | void *cookie, |
| 2276 | void *handle, |
| 2277 | uint64_t flags) |
| 2278 | { |
| 2279 | switch (smc_fid) { |
| 2280 | |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 2281 | case FFA_VERSION: |
| 2282 | return ffa_version_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2283 | x4, cookie, handle, flags); |
| 2284 | |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 2285 | case FFA_SPM_ID_GET: |
| 2286 | return ffa_spm_id_get_handler(smc_fid, secure_origin, x1, x2, |
| 2287 | x3, x4, cookie, handle, flags); |
| 2288 | |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 2289 | case FFA_ID_GET: |
| 2290 | return ffa_id_get_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2291 | x4, cookie, handle, flags); |
| 2292 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 2293 | case FFA_FEATURES: |
| 2294 | return ffa_features_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2295 | x4, cookie, handle, flags); |
| 2296 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 2297 | case FFA_SECONDARY_EP_REGISTER_SMC64: |
| 2298 | return ffa_sec_ep_register_handler(smc_fid, secure_origin, x1, |
| 2299 | x2, x3, x4, cookie, handle, |
| 2300 | flags); |
| 2301 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 2302 | case FFA_MSG_SEND_DIRECT_REQ_SMC32: |
| 2303 | case FFA_MSG_SEND_DIRECT_REQ_SMC64: |
| 2304 | return direct_req_smc_handler(smc_fid, secure_origin, x1, x2, |
| 2305 | x3, x4, cookie, handle, flags); |
| 2306 | |
| 2307 | case FFA_MSG_SEND_DIRECT_RESP_SMC32: |
| 2308 | case FFA_MSG_SEND_DIRECT_RESP_SMC64: |
| 2309 | return direct_resp_smc_handler(smc_fid, secure_origin, x1, x2, |
| 2310 | x3, x4, cookie, handle, flags); |
| 2311 | |
Marc Bonnici | 0cf1a15 | 2021-08-25 12:09:37 +0100 | [diff] [blame] | 2312 | case FFA_RXTX_MAP_SMC32: |
| 2313 | case FFA_RXTX_MAP_SMC64: |
| 2314 | return rxtx_map_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2315 | cookie, handle, flags); |
| 2316 | |
| 2317 | case FFA_RXTX_UNMAP: |
| 2318 | return rxtx_unmap_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2319 | x4, cookie, handle, flags); |
| 2320 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 2321 | case FFA_PARTITION_INFO_GET: |
| 2322 | return partition_info_get_handler(smc_fid, secure_origin, x1, |
| 2323 | x2, x3, x4, cookie, handle, |
| 2324 | flags); |
| 2325 | |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 2326 | case FFA_RX_RELEASE: |
| 2327 | return rx_release_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2328 | x4, cookie, handle, flags); |
| 2329 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 2330 | case FFA_MSG_WAIT: |
| 2331 | return msg_wait_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2332 | cookie, handle, flags); |
| 2333 | |
Marc Bonnici | b4e9984 | 2021-12-10 09:21:56 +0000 | [diff] [blame] | 2334 | case FFA_ERROR: |
| 2335 | return ffa_error_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2336 | cookie, handle, flags); |
| 2337 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 2338 | case FFA_MSG_RUN: |
| 2339 | return ffa_run_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2340 | cookie, handle, flags); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 2341 | |
| 2342 | case FFA_MEM_SHARE_SMC32: |
| 2343 | case FFA_MEM_SHARE_SMC64: |
| 2344 | case FFA_MEM_LEND_SMC32: |
| 2345 | case FFA_MEM_LEND_SMC64: |
| 2346 | return spmc_ffa_mem_send(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2347 | cookie, handle, flags); |
| 2348 | |
| 2349 | case FFA_MEM_FRAG_TX: |
| 2350 | return spmc_ffa_mem_frag_tx(smc_fid, secure_origin, x1, x2, x3, |
| 2351 | x4, cookie, handle, flags); |
| 2352 | |
| 2353 | case FFA_MEM_FRAG_RX: |
| 2354 | return spmc_ffa_mem_frag_rx(smc_fid, secure_origin, x1, x2, x3, |
| 2355 | x4, cookie, handle, flags); |
| 2356 | |
| 2357 | case FFA_MEM_RETRIEVE_REQ_SMC32: |
| 2358 | case FFA_MEM_RETRIEVE_REQ_SMC64: |
| 2359 | return spmc_ffa_mem_retrieve_req(smc_fid, secure_origin, x1, x2, |
| 2360 | x3, x4, cookie, handle, flags); |
| 2361 | |
| 2362 | case FFA_MEM_RELINQUISH: |
| 2363 | return spmc_ffa_mem_relinquish(smc_fid, secure_origin, x1, x2, |
| 2364 | x3, x4, cookie, handle, flags); |
| 2365 | |
| 2366 | case FFA_MEM_RECLAIM: |
| 2367 | return spmc_ffa_mem_reclaim(smc_fid, secure_origin, x1, x2, x3, |
| 2368 | x4, cookie, handle, flags); |
| 2369 | |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 2370 | case FFA_MEM_PERM_GET: |
| 2371 | return ffa_mem_perm_get_handler(smc_fid, secure_origin, x1, x2, |
| 2372 | x3, x4, cookie, handle, flags); |
| 2373 | |
| 2374 | case FFA_MEM_PERM_SET: |
| 2375 | return ffa_mem_perm_set_handler(smc_fid, secure_origin, x1, x2, |
| 2376 | x3, x4, cookie, handle, flags); |
| 2377 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2378 | default: |
| 2379 | WARN("Unsupported FF-A call 0x%08x.\n", smc_fid); |
| 2380 | break; |
| 2381 | } |
| 2382 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 2383 | } |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2384 | |
| 2385 | /******************************************************************************* |
| 2386 | * This function is the handler registered for S-EL1 interrupts by the SPMC. It |
| 2387 | * validates the interrupt and upon success arranges entry into the SP for |
| 2388 | * handling the interrupt. |
| 2389 | ******************************************************************************/ |
| 2390 | static uint64_t spmc_sp_interrupt_handler(uint32_t id, |
| 2391 | uint32_t flags, |
| 2392 | void *handle, |
| 2393 | void *cookie) |
| 2394 | { |
| 2395 | struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
| 2396 | struct sp_exec_ctx *ec; |
| 2397 | uint32_t linear_id = plat_my_core_pos(); |
| 2398 | |
| 2399 | /* Sanity check for a NULL pointer dereference. */ |
| 2400 | assert(sp != NULL); |
| 2401 | |
| 2402 | /* Check the security state when the exception was generated. */ |
| 2403 | assert(get_interrupt_src_ss(flags) == NON_SECURE); |
| 2404 | |
| 2405 | /* Panic if not an S-EL1 Partition. */ |
| 2406 | if (sp->runtime_el != S_EL1) { |
| 2407 | ERROR("Interrupt received for a non S-EL1 SP on core%u.\n", |
| 2408 | linear_id); |
| 2409 | panic(); |
| 2410 | } |
| 2411 | |
| 2412 | /* Obtain a reference to the SP execution context. */ |
| 2413 | ec = spmc_get_sp_ec(sp); |
| 2414 | |
| 2415 | /* Ensure that the execution context is in waiting state else panic. */ |
| 2416 | if (ec->rt_state != RT_STATE_WAITING) { |
| 2417 | ERROR("SP EC on core%u is not waiting (%u), it is (%u).\n", |
| 2418 | linear_id, RT_STATE_WAITING, ec->rt_state); |
| 2419 | panic(); |
| 2420 | } |
| 2421 | |
| 2422 | /* Update the runtime model and state of the partition. */ |
| 2423 | ec->rt_model = RT_MODEL_INTR; |
| 2424 | ec->rt_state = RT_STATE_RUNNING; |
| 2425 | |
| 2426 | VERBOSE("SP (0x%x) interrupt start on core%u.\n", sp->sp_id, linear_id); |
| 2427 | |
| 2428 | /* |
| 2429 | * Forward the interrupt to the S-EL1 SP. The interrupt ID is not |
| 2430 | * populated as the SP can determine this by itself. |
| 2431 | */ |
| 2432 | return spmd_smc_switch_state(FFA_INTERRUPT, false, |
| 2433 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 2434 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 2435 | handle); |
| 2436 | } |