Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1 | /* |
Shruti Gupta | a5a1cbd | 2023-01-19 21:50:55 +0000 | [diff] [blame] | 2 | * Copyright (c) 2022-2024, 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> |
Shruti Gupta | a5a1cbd | 2023-01-19 21:50:55 +0000 | [diff] [blame] | 9 | #include <stdio.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 10 | |
| 11 | #include <arch_helpers.h> |
| 12 | #include <bl31/bl31.h> |
| 13 | #include <bl31/ehf.h> |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 14 | #include <bl31/interrupt_mgmt.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 15 | #include <common/debug.h> |
| 16 | #include <common/fdt_wrappers.h> |
| 17 | #include <common/runtime_svc.h> |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 18 | #include <common/uuid.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 19 | #include <lib/el3_runtime/context_mgmt.h> |
| 20 | #include <lib/smccc.h> |
| 21 | #include <lib/utils.h> |
| 22 | #include <lib/xlat_tables/xlat_tables_v2.h> |
| 23 | #include <libfdt.h> |
| 24 | #include <plat/common/platform.h> |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 25 | #include <services/el3_spmc_logical_sp.h> |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 26 | #include <services/ffa_svc.h> |
| 27 | #include <services/spmc_svc.h> |
| 28 | #include <services/spmd_svc.h> |
| 29 | #include "spmc.h" |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 30 | #include "spmc_shared_mem.h" |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 31 | |
| 32 | #include <platform_def.h> |
| 33 | |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 34 | /* FFA_MEM_PERM_* helpers */ |
| 35 | #define FFA_MEM_PERM_MASK U(7) |
| 36 | #define FFA_MEM_PERM_DATA_MASK U(3) |
| 37 | #define FFA_MEM_PERM_DATA_SHIFT U(0) |
| 38 | #define FFA_MEM_PERM_DATA_NA U(0) |
| 39 | #define FFA_MEM_PERM_DATA_RW U(1) |
| 40 | #define FFA_MEM_PERM_DATA_RES U(2) |
| 41 | #define FFA_MEM_PERM_DATA_RO U(3) |
| 42 | #define FFA_MEM_PERM_INST_EXEC (U(0) << 2) |
| 43 | #define FFA_MEM_PERM_INST_NON_EXEC (U(1) << 2) |
| 44 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 45 | /* Declare the maximum number of SPs and El3 LPs. */ |
| 46 | #define MAX_SP_LP_PARTITIONS SECURE_PARTITION_COUNT + MAX_EL3_LP_DESCS_COUNT |
| 47 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 48 | /* |
| 49 | * Allocate a secure partition descriptor to describe each SP in the system that |
| 50 | * does not reside at EL3. |
| 51 | */ |
| 52 | static struct secure_partition_desc sp_desc[SECURE_PARTITION_COUNT]; |
| 53 | |
| 54 | /* |
| 55 | * Allocate an NS endpoint descriptor to describe each VM and the Hypervisor in |
| 56 | * the system that interacts with a SP. It is used to track the Hypervisor |
| 57 | * buffer pair, version and ID for now. It could be extended to track VM |
| 58 | * properties when the SPMC supports indirect messaging. |
| 59 | */ |
| 60 | static struct ns_endpoint_desc ns_ep_desc[NS_PARTITION_COUNT]; |
| 61 | |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 62 | static uint64_t spmc_sp_interrupt_handler(uint32_t id, |
| 63 | uint32_t flags, |
| 64 | void *handle, |
| 65 | void *cookie); |
| 66 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 67 | /* |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 68 | * Helper function to obtain the array storing the EL3 |
| 69 | * Logical Partition descriptors. |
| 70 | */ |
| 71 | struct el3_lp_desc *get_el3_lp_array(void) |
| 72 | { |
| 73 | return (struct el3_lp_desc *) EL3_LP_DESCS_START; |
| 74 | } |
| 75 | |
| 76 | /* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 77 | * Helper function to obtain the descriptor of the last SP to whom control was |
| 78 | * handed to on this physical cpu. Currently, we assume there is only one SP. |
| 79 | * TODO: Expand to track multiple partitions when required. |
| 80 | */ |
| 81 | struct secure_partition_desc *spmc_get_current_sp_ctx(void) |
| 82 | { |
| 83 | return &(sp_desc[ACTIVE_SP_DESC_INDEX]); |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Helper function to obtain the execution context of an SP on the |
| 88 | * current physical cpu. |
| 89 | */ |
| 90 | struct sp_exec_ctx *spmc_get_sp_ec(struct secure_partition_desc *sp) |
| 91 | { |
| 92 | return &(sp->ec[get_ec_index(sp)]); |
| 93 | } |
| 94 | |
| 95 | /* Helper function to get pointer to SP context from its ID. */ |
| 96 | struct secure_partition_desc *spmc_get_sp_ctx(uint16_t id) |
| 97 | { |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 98 | /* Check for Secure World Partitions. */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 99 | for (unsigned int i = 0U; i < SECURE_PARTITION_COUNT; i++) { |
| 100 | if (sp_desc[i].sp_id == id) { |
| 101 | return &(sp_desc[i]); |
| 102 | } |
| 103 | } |
| 104 | return NULL; |
| 105 | } |
| 106 | |
Marc Bonnici | 52a9cbc | 2021-11-24 10:32:16 +0000 | [diff] [blame] | 107 | /* |
| 108 | * Helper function to obtain the descriptor of the Hypervisor or OS kernel. |
| 109 | * We assume that the first descriptor is reserved for this entity. |
| 110 | */ |
| 111 | struct ns_endpoint_desc *spmc_get_hyp_ctx(void) |
| 112 | { |
| 113 | return &(ns_ep_desc[0]); |
| 114 | } |
| 115 | |
Marc Bonnici | a2cfa61 | 2021-11-24 10:33:48 +0000 | [diff] [blame] | 116 | /* |
| 117 | * Helper function to obtain the RX/TX buffer pair descriptor of the Hypervisor |
| 118 | * or OS kernel in the normal world or the last SP that was run. |
| 119 | */ |
| 120 | struct mailbox *spmc_get_mbox_desc(bool secure_origin) |
| 121 | { |
| 122 | /* Obtain the RX/TX buffer pair descriptor. */ |
| 123 | if (secure_origin) { |
| 124 | return &(spmc_get_current_sp_ctx()->mailbox); |
| 125 | } else { |
| 126 | return &(spmc_get_hyp_ctx()->mailbox); |
| 127 | } |
| 128 | } |
| 129 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 130 | /****************************************************************************** |
| 131 | * This function returns to the place where spmc_sp_synchronous_entry() was |
| 132 | * called originally. |
| 133 | ******************************************************************************/ |
| 134 | __dead2 void spmc_sp_synchronous_exit(struct sp_exec_ctx *ec, uint64_t rc) |
| 135 | { |
| 136 | /* |
| 137 | * The SPM must have initiated the original request through a |
| 138 | * synchronous entry into the secure partition. Jump back to the |
| 139 | * original C runtime context with the value of rc in x0; |
| 140 | */ |
| 141 | spm_secure_partition_exit(ec->c_rt_ctx, rc); |
| 142 | |
| 143 | panic(); |
| 144 | } |
| 145 | |
| 146 | /******************************************************************************* |
| 147 | * Return FFA_ERROR with specified error code. |
| 148 | ******************************************************************************/ |
| 149 | uint64_t spmc_ffa_error_return(void *handle, int error_code) |
| 150 | { |
| 151 | SMC_RET8(handle, FFA_ERROR, |
| 152 | FFA_TARGET_INFO_MBZ, error_code, |
| 153 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 154 | FFA_PARAM_MBZ, FFA_PARAM_MBZ); |
| 155 | } |
| 156 | |
| 157 | /****************************************************************************** |
| 158 | * Helper function to validate a secure partition ID to ensure it does not |
| 159 | * conflict with any other FF-A component and follows the convention to |
| 160 | * indicate it resides within the secure world. |
| 161 | ******************************************************************************/ |
| 162 | bool is_ffa_secure_id_valid(uint16_t partition_id) |
| 163 | { |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 164 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 165 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 166 | /* Ensure the ID is not the invalid partition ID. */ |
| 167 | if (partition_id == INV_SP_ID) { |
| 168 | return false; |
| 169 | } |
| 170 | |
| 171 | /* Ensure the ID is not the SPMD ID. */ |
| 172 | if (partition_id == SPMD_DIRECT_MSG_ENDPOINT_ID) { |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Ensure the ID follows the convention to indicate it resides |
| 178 | * in the secure world. |
| 179 | */ |
| 180 | if (!ffa_is_secure_world_id(partition_id)) { |
| 181 | return false; |
| 182 | } |
| 183 | |
| 184 | /* Ensure we don't conflict with the SPMC partition ID. */ |
| 185 | if (partition_id == FFA_SPMC_ID) { |
| 186 | return false; |
| 187 | } |
| 188 | |
| 189 | /* Ensure we do not already have an SP context with this ID. */ |
| 190 | if (spmc_get_sp_ctx(partition_id)) { |
| 191 | return false; |
| 192 | } |
| 193 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 194 | /* Ensure we don't clash with any Logical SP's. */ |
| 195 | for (unsigned int i = 0U; i < EL3_LP_DESCS_COUNT; i++) { |
| 196 | if (el3_lp_descs[i].sp_id == partition_id) { |
| 197 | return false; |
| 198 | } |
| 199 | } |
| 200 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 201 | return true; |
| 202 | } |
| 203 | |
| 204 | /******************************************************************************* |
Marc Bonnici | 7e19db8 | 2021-11-29 17:17:29 +0000 | [diff] [blame] | 205 | * This function either forwards the request to the other world or returns |
| 206 | * with an ERET depending on the source of the call. |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 207 | * We can assume that the destination is for an entity at a lower exception |
| 208 | * level as any messages destined for a logical SP resident in EL3 will have |
| 209 | * already been taken care of by the SPMC before entering this function. |
Marc Bonnici | 7e19db8 | 2021-11-29 17:17:29 +0000 | [diff] [blame] | 210 | ******************************************************************************/ |
| 211 | static uint64_t spmc_smc_return(uint32_t smc_fid, |
| 212 | bool secure_origin, |
| 213 | uint64_t x1, |
| 214 | uint64_t x2, |
| 215 | uint64_t x3, |
| 216 | uint64_t x4, |
| 217 | void *handle, |
| 218 | void *cookie, |
| 219 | uint64_t flags, |
| 220 | uint16_t dst_id) |
| 221 | { |
| 222 | /* If the destination is in the normal world always go via the SPMD. */ |
| 223 | if (ffa_is_normal_world_id(dst_id)) { |
| 224 | return spmd_smc_handler(smc_fid, x1, x2, x3, x4, |
| 225 | cookie, handle, flags); |
| 226 | } |
| 227 | /* |
| 228 | * If the caller is secure and we want to return to the secure world, |
| 229 | * ERET directly. |
| 230 | */ |
| 231 | else if (secure_origin && ffa_is_secure_world_id(dst_id)) { |
| 232 | SMC_RET5(handle, smc_fid, x1, x2, x3, x4); |
| 233 | } |
| 234 | /* If we originated in the normal world then switch contexts. */ |
| 235 | else if (!secure_origin && ffa_is_secure_world_id(dst_id)) { |
| 236 | return spmd_smc_switch_state(smc_fid, secure_origin, x1, x2, |
| 237 | x3, x4, handle); |
| 238 | } else { |
| 239 | /* Unknown State. */ |
| 240 | panic(); |
| 241 | } |
| 242 | |
| 243 | /* Shouldn't be Reached. */ |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | /******************************************************************************* |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 248 | * FF-A ABI Handlers. |
| 249 | ******************************************************************************/ |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 250 | |
| 251 | /******************************************************************************* |
| 252 | * Helper function to validate arg2 as part of a direct message. |
| 253 | ******************************************************************************/ |
| 254 | static inline bool direct_msg_validate_arg2(uint64_t x2) |
| 255 | { |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 256 | /* Check message type. */ |
| 257 | if (x2 & FFA_FWK_MSG_BIT) { |
| 258 | /* We have a framework message, ensure it is a known message. */ |
| 259 | if (x2 & ~(FFA_FWK_MSG_MASK | FFA_FWK_MSG_BIT)) { |
| 260 | VERBOSE("Invalid message format 0x%lx.\n", x2); |
| 261 | return false; |
| 262 | } |
| 263 | } else { |
| 264 | /* We have a partition messages, ensure x2 is not set. */ |
| 265 | if (x2 != (uint64_t) 0) { |
| 266 | VERBOSE("Arg2 MBZ for partition messages. (0x%lx).\n", |
| 267 | x2); |
| 268 | return false; |
| 269 | } |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 270 | } |
| 271 | return true; |
| 272 | } |
| 273 | |
| 274 | /******************************************************************************* |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 275 | * Helper function to validate the destination ID of a direct response. |
| 276 | ******************************************************************************/ |
| 277 | static bool direct_msg_validate_dst_id(uint16_t dst_id) |
| 278 | { |
| 279 | struct secure_partition_desc *sp; |
| 280 | |
| 281 | /* Check if we're targeting a normal world partition. */ |
| 282 | if (ffa_is_normal_world_id(dst_id)) { |
| 283 | return true; |
| 284 | } |
| 285 | |
| 286 | /* Or directed to the SPMC itself.*/ |
| 287 | if (dst_id == FFA_SPMC_ID) { |
| 288 | return true; |
| 289 | } |
| 290 | |
| 291 | /* Otherwise ensure the SP exists. */ |
| 292 | sp = spmc_get_sp_ctx(dst_id); |
| 293 | if (sp != NULL) { |
| 294 | return true; |
| 295 | } |
| 296 | |
| 297 | return false; |
| 298 | } |
| 299 | |
| 300 | /******************************************************************************* |
| 301 | * Helper function to validate the response from a Logical Partition. |
| 302 | ******************************************************************************/ |
| 303 | static bool direct_msg_validate_lp_resp(uint16_t origin_id, uint16_t lp_id, |
| 304 | void *handle) |
| 305 | { |
| 306 | /* Retrieve populated Direct Response Arguments. */ |
| 307 | uint64_t x1 = SMC_GET_GP(handle, CTX_GPREG_X1); |
| 308 | uint64_t x2 = SMC_GET_GP(handle, CTX_GPREG_X2); |
| 309 | uint16_t src_id = ffa_endpoint_source(x1); |
| 310 | uint16_t dst_id = ffa_endpoint_destination(x1); |
| 311 | |
| 312 | if (src_id != lp_id) { |
| 313 | ERROR("Invalid EL3 LP source ID (0x%x).\n", src_id); |
| 314 | return false; |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Check the destination ID is valid and ensure the LP is responding to |
| 319 | * the original request. |
| 320 | */ |
| 321 | if ((!direct_msg_validate_dst_id(dst_id)) || (dst_id != origin_id)) { |
| 322 | ERROR("Invalid EL3 LP destination ID (0x%x).\n", dst_id); |
| 323 | return false; |
| 324 | } |
| 325 | |
| 326 | if (!direct_msg_validate_arg2(x2)) { |
| 327 | ERROR("Invalid EL3 LP message encoding.\n"); |
| 328 | return false; |
| 329 | } |
| 330 | return true; |
| 331 | } |
| 332 | |
| 333 | /******************************************************************************* |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 334 | * Handle direct request messages and route to the appropriate destination. |
| 335 | ******************************************************************************/ |
| 336 | static uint64_t direct_req_smc_handler(uint32_t smc_fid, |
| 337 | bool secure_origin, |
| 338 | uint64_t x1, |
| 339 | uint64_t x2, |
| 340 | uint64_t x3, |
| 341 | uint64_t x4, |
| 342 | void *cookie, |
| 343 | void *handle, |
| 344 | uint64_t flags) |
| 345 | { |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 346 | uint16_t src_id = ffa_endpoint_source(x1); |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 347 | uint16_t dst_id = ffa_endpoint_destination(x1); |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 348 | struct el3_lp_desc *el3_lp_descs; |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 349 | struct secure_partition_desc *sp; |
| 350 | unsigned int idx; |
| 351 | |
| 352 | /* Check if arg2 has been populated correctly based on message type. */ |
| 353 | if (!direct_msg_validate_arg2(x2)) { |
| 354 | return spmc_ffa_error_return(handle, |
| 355 | FFA_ERROR_INVALID_PARAMETER); |
| 356 | } |
| 357 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 358 | /* Validate Sender is either the current SP or from the normal world. */ |
| 359 | if ((secure_origin && src_id != spmc_get_current_sp_ctx()->sp_id) || |
| 360 | (!secure_origin && !ffa_is_normal_world_id(src_id))) { |
| 361 | ERROR("Invalid direct request source ID (0x%x).\n", src_id); |
| 362 | return spmc_ffa_error_return(handle, |
| 363 | FFA_ERROR_INVALID_PARAMETER); |
| 364 | } |
| 365 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 366 | el3_lp_descs = get_el3_lp_array(); |
| 367 | |
| 368 | /* Check if the request is destined for a Logical Partition. */ |
| 369 | for (unsigned int i = 0U; i < MAX_EL3_LP_DESCS_COUNT; i++) { |
| 370 | if (el3_lp_descs[i].sp_id == dst_id) { |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 371 | uint64_t ret = el3_lp_descs[i].direct_req( |
| 372 | smc_fid, secure_origin, x1, x2, |
| 373 | x3, x4, cookie, handle, flags); |
| 374 | if (!direct_msg_validate_lp_resp(src_id, dst_id, |
| 375 | handle)) { |
| 376 | panic(); |
| 377 | } |
| 378 | |
| 379 | /* Message checks out. */ |
| 380 | return ret; |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 381 | } |
| 382 | } |
| 383 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 384 | /* |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 385 | * If the request was not targeted to a LSP and from the secure world |
| 386 | * then it is invalid since a SP cannot call into the Normal world and |
| 387 | * there is no other SP to call into. If there are other SPs in future |
| 388 | * then the partition runtime model would need to be validated as well. |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 389 | */ |
| 390 | if (secure_origin) { |
| 391 | VERBOSE("Direct request not supported to the Normal World.\n"); |
| 392 | return spmc_ffa_error_return(handle, |
| 393 | FFA_ERROR_INVALID_PARAMETER); |
| 394 | } |
| 395 | |
| 396 | /* Check if the SP ID is valid. */ |
| 397 | sp = spmc_get_sp_ctx(dst_id); |
| 398 | if (sp == NULL) { |
| 399 | VERBOSE("Direct request to unknown partition ID (0x%x).\n", |
| 400 | dst_id); |
| 401 | return spmc_ffa_error_return(handle, |
| 402 | FFA_ERROR_INVALID_PARAMETER); |
| 403 | } |
| 404 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 405 | /* Protect the runtime state of a UP S-EL0 SP with a lock. */ |
| 406 | if (sp->runtime_el == S_EL0) { |
| 407 | spin_lock(&sp->rt_state_lock); |
| 408 | } |
| 409 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 410 | /* |
| 411 | * Check that the target execution context is in a waiting state before |
| 412 | * forwarding the direct request to it. |
| 413 | */ |
| 414 | idx = get_ec_index(sp); |
| 415 | if (sp->ec[idx].rt_state != RT_STATE_WAITING) { |
| 416 | VERBOSE("SP context on core%u is not waiting (%u).\n", |
| 417 | idx, sp->ec[idx].rt_model); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 418 | |
| 419 | if (sp->runtime_el == S_EL0) { |
| 420 | spin_unlock(&sp->rt_state_lock); |
| 421 | } |
| 422 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 423 | return spmc_ffa_error_return(handle, FFA_ERROR_BUSY); |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Everything checks out so forward the request to the SP after updating |
| 428 | * its state and runtime model. |
| 429 | */ |
| 430 | sp->ec[idx].rt_state = RT_STATE_RUNNING; |
| 431 | sp->ec[idx].rt_model = RT_MODEL_DIR_REQ; |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 432 | sp->ec[idx].dir_req_origin_id = src_id; |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 433 | |
| 434 | if (sp->runtime_el == S_EL0) { |
| 435 | spin_unlock(&sp->rt_state_lock); |
| 436 | } |
| 437 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 438 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 439 | handle, cookie, flags, dst_id); |
| 440 | } |
| 441 | |
| 442 | /******************************************************************************* |
| 443 | * Handle direct response messages and route to the appropriate destination. |
| 444 | ******************************************************************************/ |
| 445 | static uint64_t direct_resp_smc_handler(uint32_t smc_fid, |
| 446 | bool secure_origin, |
| 447 | uint64_t x1, |
| 448 | uint64_t x2, |
| 449 | uint64_t x3, |
| 450 | uint64_t x4, |
| 451 | void *cookie, |
| 452 | void *handle, |
| 453 | uint64_t flags) |
| 454 | { |
| 455 | uint16_t dst_id = ffa_endpoint_destination(x1); |
| 456 | struct secure_partition_desc *sp; |
| 457 | unsigned int idx; |
| 458 | |
| 459 | /* Check if arg2 has been populated correctly based on message type. */ |
| 460 | if (!direct_msg_validate_arg2(x2)) { |
| 461 | return spmc_ffa_error_return(handle, |
| 462 | FFA_ERROR_INVALID_PARAMETER); |
| 463 | } |
| 464 | |
| 465 | /* Check that the response did not originate from the Normal world. */ |
| 466 | if (!secure_origin) { |
| 467 | VERBOSE("Direct Response not supported from Normal World.\n"); |
| 468 | return spmc_ffa_error_return(handle, |
| 469 | FFA_ERROR_INVALID_PARAMETER); |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * Check that the response is either targeted to the Normal world or the |
| 474 | * SPMC e.g. a PM response. |
| 475 | */ |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 476 | if (!direct_msg_validate_dst_id(dst_id)) { |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 477 | VERBOSE("Direct response to invalid partition ID (0x%x).\n", |
| 478 | dst_id); |
| 479 | return spmc_ffa_error_return(handle, |
| 480 | FFA_ERROR_INVALID_PARAMETER); |
| 481 | } |
| 482 | |
| 483 | /* Obtain the SP descriptor and update its runtime state. */ |
| 484 | sp = spmc_get_sp_ctx(ffa_endpoint_source(x1)); |
| 485 | if (sp == NULL) { |
| 486 | VERBOSE("Direct response to unknown partition ID (0x%x).\n", |
| 487 | dst_id); |
| 488 | return spmc_ffa_error_return(handle, |
| 489 | FFA_ERROR_INVALID_PARAMETER); |
| 490 | } |
| 491 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 492 | if (sp->runtime_el == S_EL0) { |
| 493 | spin_lock(&sp->rt_state_lock); |
| 494 | } |
| 495 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 496 | /* Sanity check state is being tracked correctly in the SPMC. */ |
| 497 | idx = get_ec_index(sp); |
| 498 | assert(sp->ec[idx].rt_state == RT_STATE_RUNNING); |
| 499 | |
| 500 | /* Ensure SP execution context was in the right runtime model. */ |
| 501 | if (sp->ec[idx].rt_model != RT_MODEL_DIR_REQ) { |
| 502 | VERBOSE("SP context on core%u not handling direct req (%u).\n", |
| 503 | idx, sp->ec[idx].rt_model); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 504 | if (sp->runtime_el == S_EL0) { |
| 505 | spin_unlock(&sp->rt_state_lock); |
| 506 | } |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 507 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 508 | } |
| 509 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 510 | if (sp->ec[idx].dir_req_origin_id != dst_id) { |
| 511 | WARN("Invalid direct resp partition ID 0x%x != 0x%x on core%u.\n", |
| 512 | dst_id, sp->ec[idx].dir_req_origin_id, idx); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 513 | if (sp->runtime_el == S_EL0) { |
| 514 | spin_unlock(&sp->rt_state_lock); |
| 515 | } |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 516 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 517 | } |
| 518 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 519 | /* Update the state of the SP execution context. */ |
| 520 | sp->ec[idx].rt_state = RT_STATE_WAITING; |
| 521 | |
Marc Bonnici | a939594 | 2022-11-15 11:15:48 +0000 | [diff] [blame] | 522 | /* Clear the ongoing direct request ID. */ |
| 523 | sp->ec[idx].dir_req_origin_id = INV_SP_ID; |
| 524 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 525 | if (sp->runtime_el == S_EL0) { |
| 526 | spin_unlock(&sp->rt_state_lock); |
| 527 | } |
| 528 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 529 | /* |
| 530 | * If the receiver is not the SPMC then forward the response to the |
| 531 | * Normal world. |
| 532 | */ |
| 533 | if (dst_id == FFA_SPMC_ID) { |
| 534 | spmc_sp_synchronous_exit(&sp->ec[idx], x4); |
| 535 | /* Should not get here. */ |
| 536 | panic(); |
| 537 | } |
| 538 | |
| 539 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 540 | handle, cookie, flags, dst_id); |
| 541 | } |
| 542 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 543 | /******************************************************************************* |
| 544 | * This function handles the FFA_MSG_WAIT SMC to allow an SP to relinquish its |
| 545 | * cycles. |
| 546 | ******************************************************************************/ |
| 547 | static uint64_t msg_wait_handler(uint32_t smc_fid, |
| 548 | bool secure_origin, |
| 549 | uint64_t x1, |
| 550 | uint64_t x2, |
| 551 | uint64_t x3, |
| 552 | uint64_t x4, |
| 553 | void *cookie, |
| 554 | void *handle, |
| 555 | uint64_t flags) |
| 556 | { |
| 557 | struct secure_partition_desc *sp; |
| 558 | unsigned int idx; |
| 559 | |
| 560 | /* |
| 561 | * Check that the response did not originate from the Normal world as |
| 562 | * only the secure world can call this ABI. |
| 563 | */ |
| 564 | if (!secure_origin) { |
| 565 | VERBOSE("Normal world cannot call FFA_MSG_WAIT.\n"); |
| 566 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 567 | } |
| 568 | |
| 569 | /* Get the descriptor of the SP that invoked FFA_MSG_WAIT. */ |
| 570 | sp = spmc_get_current_sp_ctx(); |
| 571 | if (sp == NULL) { |
| 572 | return spmc_ffa_error_return(handle, |
| 573 | FFA_ERROR_INVALID_PARAMETER); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * Get the execution context of the SP that invoked FFA_MSG_WAIT. |
| 578 | */ |
| 579 | idx = get_ec_index(sp); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 580 | if (sp->runtime_el == S_EL0) { |
| 581 | spin_lock(&sp->rt_state_lock); |
| 582 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 583 | |
| 584 | /* Ensure SP execution context was in the right runtime model. */ |
| 585 | if (sp->ec[idx].rt_model == RT_MODEL_DIR_REQ) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 586 | if (sp->runtime_el == S_EL0) { |
| 587 | spin_unlock(&sp->rt_state_lock); |
| 588 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 589 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 590 | } |
| 591 | |
| 592 | /* Sanity check the state is being tracked correctly in the SPMC. */ |
| 593 | assert(sp->ec[idx].rt_state == RT_STATE_RUNNING); |
| 594 | |
| 595 | /* |
| 596 | * Perform a synchronous exit if the partition was initialising. The |
| 597 | * state is updated after the exit. |
| 598 | */ |
| 599 | if (sp->ec[idx].rt_model == RT_MODEL_INIT) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 600 | if (sp->runtime_el == S_EL0) { |
| 601 | spin_unlock(&sp->rt_state_lock); |
| 602 | } |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 603 | spmc_sp_synchronous_exit(&sp->ec[idx], x4); |
| 604 | /* Should not get here */ |
| 605 | panic(); |
| 606 | } |
| 607 | |
| 608 | /* Update the state of the SP execution context. */ |
| 609 | sp->ec[idx].rt_state = RT_STATE_WAITING; |
| 610 | |
| 611 | /* Resume normal world if a secure interrupt was handled. */ |
| 612 | if (sp->ec[idx].rt_model == RT_MODEL_INTR) { |
| 613 | /* FFA_MSG_WAIT can only be called from the secure world. */ |
| 614 | unsigned int secure_state_in = SECURE; |
| 615 | unsigned int secure_state_out = NON_SECURE; |
| 616 | |
| 617 | cm_el1_sysregs_context_save(secure_state_in); |
| 618 | cm_el1_sysregs_context_restore(secure_state_out); |
| 619 | cm_set_next_eret_context(secure_state_out); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 620 | |
| 621 | if (sp->runtime_el == S_EL0) { |
| 622 | spin_unlock(&sp->rt_state_lock); |
| 623 | } |
| 624 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 625 | SMC_RET0(cm_get_context(secure_state_out)); |
| 626 | } |
| 627 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 628 | /* Protect the runtime state of a S-EL0 SP with a lock. */ |
| 629 | if (sp->runtime_el == S_EL0) { |
| 630 | spin_unlock(&sp->rt_state_lock); |
| 631 | } |
| 632 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 633 | /* Forward the response to the Normal world. */ |
| 634 | return spmc_smc_return(smc_fid, secure_origin, x1, x2, x3, x4, |
| 635 | handle, cookie, flags, FFA_NWD_ID); |
| 636 | } |
| 637 | |
Marc Bonnici | b4e9984 | 2021-12-10 09:21:56 +0000 | [diff] [blame] | 638 | static uint64_t ffa_error_handler(uint32_t smc_fid, |
| 639 | bool secure_origin, |
| 640 | uint64_t x1, |
| 641 | uint64_t x2, |
| 642 | uint64_t x3, |
| 643 | uint64_t x4, |
| 644 | void *cookie, |
| 645 | void *handle, |
| 646 | uint64_t flags) |
| 647 | { |
| 648 | struct secure_partition_desc *sp; |
| 649 | unsigned int idx; |
| 650 | |
| 651 | /* Check that the response did not originate from the Normal world. */ |
| 652 | if (!secure_origin) { |
| 653 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 654 | } |
| 655 | |
| 656 | /* Get the descriptor of the SP that invoked FFA_ERROR. */ |
| 657 | sp = spmc_get_current_sp_ctx(); |
| 658 | if (sp == NULL) { |
| 659 | return spmc_ffa_error_return(handle, |
| 660 | FFA_ERROR_INVALID_PARAMETER); |
| 661 | } |
| 662 | |
| 663 | /* Get the execution context of the SP that invoked FFA_ERROR. */ |
| 664 | idx = get_ec_index(sp); |
| 665 | |
| 666 | /* |
| 667 | * We only expect FFA_ERROR to be received during SP initialisation |
| 668 | * otherwise this is an invalid call. |
| 669 | */ |
| 670 | if (sp->ec[idx].rt_model == RT_MODEL_INIT) { |
| 671 | ERROR("SP 0x%x failed to initialize.\n", sp->sp_id); |
| 672 | spmc_sp_synchronous_exit(&sp->ec[idx], x2); |
| 673 | /* Should not get here. */ |
| 674 | panic(); |
| 675 | } |
| 676 | |
| 677 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 678 | } |
| 679 | |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 680 | static uint64_t ffa_version_handler(uint32_t smc_fid, |
| 681 | bool secure_origin, |
| 682 | uint64_t x1, |
| 683 | uint64_t x2, |
| 684 | uint64_t x3, |
| 685 | uint64_t x4, |
| 686 | void *cookie, |
| 687 | void *handle, |
| 688 | uint64_t flags) |
| 689 | { |
| 690 | uint32_t requested_version = x1 & FFA_VERSION_MASK; |
| 691 | |
| 692 | if (requested_version & FFA_VERSION_BIT31_MASK) { |
| 693 | /* Invalid encoding, return an error. */ |
| 694 | SMC_RET1(handle, FFA_ERROR_NOT_SUPPORTED); |
| 695 | /* Execution stops here. */ |
| 696 | } |
| 697 | |
| 698 | /* Determine the caller to store the requested version. */ |
| 699 | if (secure_origin) { |
| 700 | /* |
| 701 | * Ensure that the SP is reporting the same version as |
| 702 | * specified in its manifest. If these do not match there is |
| 703 | * something wrong with the SP. |
| 704 | * TODO: Should we abort the SP? For now assert this is not |
| 705 | * case. |
| 706 | */ |
| 707 | assert(requested_version == |
| 708 | spmc_get_current_sp_ctx()->ffa_version); |
| 709 | } else { |
| 710 | /* |
| 711 | * If this is called by the normal world, record this |
| 712 | * information in its descriptor. |
| 713 | */ |
| 714 | spmc_get_hyp_ctx()->ffa_version = requested_version; |
| 715 | } |
| 716 | |
| 717 | SMC_RET1(handle, MAKE_FFA_VERSION(FFA_VERSION_MAJOR, |
| 718 | FFA_VERSION_MINOR)); |
| 719 | } |
| 720 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 721 | /******************************************************************************* |
Marc Bonnici | 73fbe8f | 2021-12-09 11:32:30 +0000 | [diff] [blame] | 722 | * Helper function to obtain the FF-A version of the calling partition. |
| 723 | ******************************************************************************/ |
| 724 | uint32_t get_partition_ffa_version(bool secure_origin) |
| 725 | { |
| 726 | if (secure_origin) { |
| 727 | return spmc_get_current_sp_ctx()->ffa_version; |
| 728 | } else { |
| 729 | return spmc_get_hyp_ctx()->ffa_version; |
| 730 | } |
| 731 | } |
| 732 | |
Marc Bonnici | 0cf1a15 | 2021-08-25 12:09:37 +0100 | [diff] [blame] | 733 | static uint64_t rxtx_map_handler(uint32_t smc_fid, |
| 734 | bool secure_origin, |
| 735 | uint64_t x1, |
| 736 | uint64_t x2, |
| 737 | uint64_t x3, |
| 738 | uint64_t x4, |
| 739 | void *cookie, |
| 740 | void *handle, |
| 741 | uint64_t flags) |
| 742 | { |
| 743 | int ret; |
| 744 | uint32_t error_code; |
| 745 | uint32_t mem_atts = secure_origin ? MT_SECURE : MT_NS; |
| 746 | struct mailbox *mbox; |
| 747 | uintptr_t tx_address = x1; |
| 748 | uintptr_t rx_address = x2; |
| 749 | uint32_t page_count = x3 & FFA_RXTX_PAGE_COUNT_MASK; /* Bits [5:0] */ |
| 750 | uint32_t buf_size = page_count * FFA_PAGE_SIZE; |
| 751 | |
| 752 | /* |
| 753 | * The SPMC does not support mapping of VM RX/TX pairs to facilitate |
| 754 | * indirect messaging with SPs. Check if the Hypervisor has invoked this |
| 755 | * ABI on behalf of a VM and reject it if this is the case. |
| 756 | */ |
| 757 | if (tx_address == 0 || rx_address == 0) { |
| 758 | WARN("Mapping RX/TX Buffers on behalf of VM not supported.\n"); |
| 759 | return spmc_ffa_error_return(handle, |
| 760 | FFA_ERROR_INVALID_PARAMETER); |
| 761 | } |
| 762 | |
| 763 | /* Ensure the specified buffers are not the same. */ |
| 764 | if (tx_address == rx_address) { |
| 765 | WARN("TX Buffer must not be the same as RX Buffer.\n"); |
| 766 | return spmc_ffa_error_return(handle, |
| 767 | FFA_ERROR_INVALID_PARAMETER); |
| 768 | } |
| 769 | |
| 770 | /* Ensure the buffer size is not 0. */ |
| 771 | if (buf_size == 0U) { |
| 772 | WARN("Buffer size must not be 0\n"); |
| 773 | return spmc_ffa_error_return(handle, |
| 774 | FFA_ERROR_INVALID_PARAMETER); |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * Ensure the buffer size is a multiple of the translation granule size |
| 779 | * in TF-A. |
| 780 | */ |
| 781 | if (buf_size % PAGE_SIZE != 0U) { |
| 782 | WARN("Buffer size must be aligned to translation granule.\n"); |
| 783 | return spmc_ffa_error_return(handle, |
| 784 | FFA_ERROR_INVALID_PARAMETER); |
| 785 | } |
| 786 | |
| 787 | /* Obtain the RX/TX buffer pair descriptor. */ |
| 788 | mbox = spmc_get_mbox_desc(secure_origin); |
| 789 | |
| 790 | spin_lock(&mbox->lock); |
| 791 | |
| 792 | /* Check if buffers have already been mapped. */ |
| 793 | if (mbox->rx_buffer != 0 || mbox->tx_buffer != 0) { |
| 794 | WARN("RX/TX Buffers already mapped (%p/%p)\n", |
| 795 | (void *) mbox->rx_buffer, (void *)mbox->tx_buffer); |
| 796 | error_code = FFA_ERROR_DENIED; |
| 797 | goto err; |
| 798 | } |
| 799 | |
| 800 | /* memmap the TX buffer as read only. */ |
| 801 | ret = mmap_add_dynamic_region(tx_address, /* PA */ |
| 802 | tx_address, /* VA */ |
| 803 | buf_size, /* size */ |
| 804 | mem_atts | MT_RO_DATA); /* attrs */ |
| 805 | if (ret != 0) { |
| 806 | /* Return the correct error code. */ |
| 807 | error_code = (ret == -ENOMEM) ? FFA_ERROR_NO_MEMORY : |
| 808 | FFA_ERROR_INVALID_PARAMETER; |
| 809 | WARN("Unable to map TX buffer: %d\n", error_code); |
| 810 | goto err; |
| 811 | } |
| 812 | |
| 813 | /* memmap the RX buffer as read write. */ |
| 814 | ret = mmap_add_dynamic_region(rx_address, /* PA */ |
| 815 | rx_address, /* VA */ |
| 816 | buf_size, /* size */ |
| 817 | mem_atts | MT_RW_DATA); /* attrs */ |
| 818 | |
| 819 | if (ret != 0) { |
| 820 | error_code = (ret == -ENOMEM) ? FFA_ERROR_NO_MEMORY : |
| 821 | FFA_ERROR_INVALID_PARAMETER; |
| 822 | WARN("Unable to map RX buffer: %d\n", error_code); |
| 823 | /* Unmap the TX buffer again. */ |
| 824 | mmap_remove_dynamic_region(tx_address, buf_size); |
| 825 | goto err; |
| 826 | } |
| 827 | |
| 828 | mbox->tx_buffer = (void *) tx_address; |
| 829 | mbox->rx_buffer = (void *) rx_address; |
| 830 | mbox->rxtx_page_count = page_count; |
| 831 | spin_unlock(&mbox->lock); |
| 832 | |
| 833 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 834 | /* Execution stops here. */ |
| 835 | err: |
| 836 | spin_unlock(&mbox->lock); |
| 837 | return spmc_ffa_error_return(handle, error_code); |
| 838 | } |
| 839 | |
| 840 | static uint64_t rxtx_unmap_handler(uint32_t smc_fid, |
| 841 | bool secure_origin, |
| 842 | uint64_t x1, |
| 843 | uint64_t x2, |
| 844 | uint64_t x3, |
| 845 | uint64_t x4, |
| 846 | void *cookie, |
| 847 | void *handle, |
| 848 | uint64_t flags) |
| 849 | { |
| 850 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 851 | uint32_t buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 852 | |
| 853 | /* |
| 854 | * The SPMC does not support mapping of VM RX/TX pairs to facilitate |
| 855 | * indirect messaging with SPs. Check if the Hypervisor has invoked this |
| 856 | * ABI on behalf of a VM and reject it if this is the case. |
| 857 | */ |
| 858 | if (x1 != 0UL) { |
| 859 | return spmc_ffa_error_return(handle, |
| 860 | FFA_ERROR_INVALID_PARAMETER); |
| 861 | } |
| 862 | |
| 863 | spin_lock(&mbox->lock); |
| 864 | |
| 865 | /* Check if buffers are currently mapped. */ |
| 866 | if (mbox->rx_buffer == 0 || mbox->tx_buffer == 0) { |
| 867 | spin_unlock(&mbox->lock); |
| 868 | return spmc_ffa_error_return(handle, |
| 869 | FFA_ERROR_INVALID_PARAMETER); |
| 870 | } |
| 871 | |
| 872 | /* Unmap RX Buffer */ |
| 873 | if (mmap_remove_dynamic_region((uintptr_t) mbox->rx_buffer, |
| 874 | buf_size) != 0) { |
| 875 | WARN("Unable to unmap RX buffer!\n"); |
| 876 | } |
| 877 | |
| 878 | mbox->rx_buffer = 0; |
| 879 | |
| 880 | /* Unmap TX Buffer */ |
| 881 | if (mmap_remove_dynamic_region((uintptr_t) mbox->tx_buffer, |
| 882 | buf_size) != 0) { |
| 883 | WARN("Unable to unmap TX buffer!\n"); |
| 884 | } |
| 885 | |
| 886 | mbox->tx_buffer = 0; |
| 887 | mbox->rxtx_page_count = 0; |
| 888 | |
| 889 | spin_unlock(&mbox->lock); |
| 890 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 891 | } |
| 892 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 893 | /* |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 894 | * Helper function to populate the properties field of a Partition Info Get |
| 895 | * descriptor. |
| 896 | */ |
| 897 | static uint32_t |
| 898 | partition_info_get_populate_properties(uint32_t sp_properties, |
| 899 | enum sp_execution_state sp_ec_state) |
| 900 | { |
| 901 | uint32_t properties = sp_properties; |
| 902 | uint32_t ec_state; |
| 903 | |
| 904 | /* Determine the execution state of the SP. */ |
| 905 | ec_state = sp_ec_state == SP_STATE_AARCH64 ? |
| 906 | FFA_PARTITION_INFO_GET_AARCH64_STATE : |
| 907 | FFA_PARTITION_INFO_GET_AARCH32_STATE; |
| 908 | |
| 909 | properties |= ec_state << FFA_PARTITION_INFO_GET_EXEC_STATE_SHIFT; |
| 910 | |
| 911 | return properties; |
| 912 | } |
| 913 | |
| 914 | /* |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 915 | * Collate the partition information in a v1.1 partition information |
| 916 | * descriptor format, this will be converter later if required. |
| 917 | */ |
| 918 | static int partition_info_get_handler_v1_1(uint32_t *uuid, |
| 919 | struct ffa_partition_info_v1_1 |
| 920 | *partitions, |
| 921 | uint32_t max_partitions, |
| 922 | uint32_t *partition_count) |
| 923 | { |
| 924 | uint32_t index; |
| 925 | struct ffa_partition_info_v1_1 *desc; |
| 926 | bool null_uuid = is_null_uuid(uuid); |
| 927 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 928 | |
| 929 | /* Deal with Logical Partitions. */ |
| 930 | for (index = 0U; index < EL3_LP_DESCS_COUNT; index++) { |
| 931 | if (null_uuid || uuid_match(uuid, el3_lp_descs[index].uuid)) { |
| 932 | /* Found a matching UUID, populate appropriately. */ |
| 933 | if (*partition_count >= max_partitions) { |
| 934 | return FFA_ERROR_NO_MEMORY; |
| 935 | } |
| 936 | |
| 937 | desc = &partitions[*partition_count]; |
| 938 | desc->ep_id = el3_lp_descs[index].sp_id; |
| 939 | desc->execution_ctx_count = PLATFORM_CORE_COUNT; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 940 | /* LSPs must be AArch64. */ |
| 941 | desc->properties = |
| 942 | partition_info_get_populate_properties( |
| 943 | el3_lp_descs[index].properties, |
| 944 | SP_STATE_AARCH64); |
| 945 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 946 | if (null_uuid) { |
| 947 | copy_uuid(desc->uuid, el3_lp_descs[index].uuid); |
| 948 | } |
| 949 | (*partition_count)++; |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | /* Deal with physical SP's. */ |
| 954 | for (index = 0U; index < SECURE_PARTITION_COUNT; index++) { |
| 955 | if (null_uuid || uuid_match(uuid, sp_desc[index].uuid)) { |
| 956 | /* Found a matching UUID, populate appropriately. */ |
| 957 | if (*partition_count >= max_partitions) { |
| 958 | return FFA_ERROR_NO_MEMORY; |
| 959 | } |
| 960 | |
| 961 | desc = &partitions[*partition_count]; |
| 962 | desc->ep_id = sp_desc[index].sp_id; |
| 963 | /* |
| 964 | * Execution context count must match No. cores for |
| 965 | * S-EL1 SPs. |
| 966 | */ |
| 967 | desc->execution_ctx_count = PLATFORM_CORE_COUNT; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 968 | desc->properties = |
| 969 | partition_info_get_populate_properties( |
| 970 | sp_desc[index].properties, |
| 971 | sp_desc[index].execution_state); |
| 972 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 973 | if (null_uuid) { |
| 974 | copy_uuid(desc->uuid, sp_desc[index].uuid); |
| 975 | } |
| 976 | (*partition_count)++; |
| 977 | } |
| 978 | } |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | /* |
| 983 | * Handle the case where that caller only wants the count of partitions |
| 984 | * matching a given UUID and does not want the corresponding descriptors |
| 985 | * populated. |
| 986 | */ |
| 987 | static uint32_t partition_info_get_handler_count_only(uint32_t *uuid) |
| 988 | { |
| 989 | uint32_t index = 0; |
| 990 | uint32_t partition_count = 0; |
| 991 | bool null_uuid = is_null_uuid(uuid); |
| 992 | struct el3_lp_desc *el3_lp_descs = get_el3_lp_array(); |
| 993 | |
| 994 | /* Deal with Logical Partitions. */ |
| 995 | for (index = 0U; index < EL3_LP_DESCS_COUNT; index++) { |
| 996 | if (null_uuid || |
| 997 | uuid_match(uuid, el3_lp_descs[index].uuid)) { |
| 998 | (partition_count)++; |
| 999 | } |
| 1000 | } |
| 1001 | |
| 1002 | /* Deal with physical SP's. */ |
| 1003 | for (index = 0U; index < SECURE_PARTITION_COUNT; index++) { |
| 1004 | if (null_uuid || uuid_match(uuid, sp_desc[index].uuid)) { |
| 1005 | (partition_count)++; |
| 1006 | } |
| 1007 | } |
| 1008 | return partition_count; |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * 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] | 1013 | * the corresponding descriptor format from the v1.1 descriptor array. |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1014 | */ |
| 1015 | static uint64_t partition_info_populate_v1_0(struct ffa_partition_info_v1_1 |
| 1016 | *partitions, |
| 1017 | struct mailbox *mbox, |
| 1018 | int partition_count) |
| 1019 | { |
| 1020 | uint32_t index; |
| 1021 | uint32_t buf_size; |
| 1022 | uint32_t descriptor_size; |
| 1023 | struct ffa_partition_info_v1_0 *v1_0_partitions = |
| 1024 | (struct ffa_partition_info_v1_0 *) mbox->rx_buffer; |
| 1025 | |
| 1026 | buf_size = mbox->rxtx_page_count * FFA_PAGE_SIZE; |
| 1027 | descriptor_size = partition_count * |
| 1028 | sizeof(struct ffa_partition_info_v1_0); |
| 1029 | |
| 1030 | if (descriptor_size > buf_size) { |
| 1031 | return FFA_ERROR_NO_MEMORY; |
| 1032 | } |
| 1033 | |
| 1034 | for (index = 0U; index < partition_count; index++) { |
| 1035 | v1_0_partitions[index].ep_id = partitions[index].ep_id; |
| 1036 | v1_0_partitions[index].execution_ctx_count = |
| 1037 | partitions[index].execution_ctx_count; |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 1038 | /* Only report v1.0 properties. */ |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1039 | v1_0_partitions[index].properties = |
Marc Bonnici | 8078501 | 2022-10-26 14:58:29 +0100 | [diff] [blame] | 1040 | (partitions[index].properties & |
| 1041 | FFA_PARTITION_INFO_GET_PROPERTIES_V1_0_MASK); |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 1042 | } |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * Main handler for FFA_PARTITION_INFO_GET which supports both FF-A v1.1 and |
| 1048 | * v1.0 implementations. |
| 1049 | */ |
| 1050 | static uint64_t partition_info_get_handler(uint32_t smc_fid, |
| 1051 | bool secure_origin, |
| 1052 | uint64_t x1, |
| 1053 | uint64_t x2, |
| 1054 | uint64_t x3, |
| 1055 | uint64_t x4, |
| 1056 | void *cookie, |
| 1057 | void *handle, |
| 1058 | uint64_t flags) |
| 1059 | { |
| 1060 | int ret; |
| 1061 | uint32_t partition_count = 0; |
| 1062 | uint32_t size = 0; |
| 1063 | uint32_t ffa_version = get_partition_ffa_version(secure_origin); |
| 1064 | struct mailbox *mbox; |
| 1065 | uint64_t info_get_flags; |
| 1066 | bool count_only; |
| 1067 | uint32_t uuid[4]; |
| 1068 | |
| 1069 | uuid[0] = x1; |
| 1070 | uuid[1] = x2; |
| 1071 | uuid[2] = x3; |
| 1072 | uuid[3] = x4; |
| 1073 | |
| 1074 | /* Determine if the Partition descriptors should be populated. */ |
| 1075 | info_get_flags = SMC_GET_GP(handle, CTX_GPREG_X5); |
| 1076 | count_only = (info_get_flags & FFA_PARTITION_INFO_GET_COUNT_FLAG_MASK); |
| 1077 | |
| 1078 | /* Handle the case where we don't need to populate the descriptors. */ |
| 1079 | if (count_only) { |
| 1080 | partition_count = partition_info_get_handler_count_only(uuid); |
| 1081 | if (partition_count == 0) { |
| 1082 | return spmc_ffa_error_return(handle, |
| 1083 | FFA_ERROR_INVALID_PARAMETER); |
| 1084 | } |
| 1085 | } else { |
| 1086 | struct ffa_partition_info_v1_1 partitions[MAX_SP_LP_PARTITIONS]; |
| 1087 | |
| 1088 | /* |
| 1089 | * Handle the case where the partition descriptors are required, |
| 1090 | * check we have the buffers available and populate the |
| 1091 | * appropriate structure version. |
| 1092 | */ |
| 1093 | |
| 1094 | /* Obtain the v1.1 format of the descriptors. */ |
| 1095 | ret = partition_info_get_handler_v1_1(uuid, partitions, |
| 1096 | MAX_SP_LP_PARTITIONS, |
| 1097 | &partition_count); |
| 1098 | |
| 1099 | /* Check if an error occurred during discovery. */ |
| 1100 | if (ret != 0) { |
| 1101 | goto err; |
| 1102 | } |
| 1103 | |
| 1104 | /* If we didn't find any matches the UUID is unknown. */ |
| 1105 | if (partition_count == 0) { |
| 1106 | ret = FFA_ERROR_INVALID_PARAMETER; |
| 1107 | goto err; |
| 1108 | } |
| 1109 | |
| 1110 | /* Obtain the partition mailbox RX/TX buffer pair descriptor. */ |
| 1111 | mbox = spmc_get_mbox_desc(secure_origin); |
| 1112 | |
| 1113 | /* |
| 1114 | * If the caller has not bothered registering its RX/TX pair |
| 1115 | * then return an error code. |
| 1116 | */ |
| 1117 | spin_lock(&mbox->lock); |
| 1118 | if (mbox->rx_buffer == NULL) { |
| 1119 | ret = FFA_ERROR_BUSY; |
| 1120 | goto err_unlock; |
| 1121 | } |
| 1122 | |
| 1123 | /* Ensure the RX buffer is currently free. */ |
| 1124 | if (mbox->state != MAILBOX_STATE_EMPTY) { |
| 1125 | ret = FFA_ERROR_BUSY; |
| 1126 | goto err_unlock; |
| 1127 | } |
| 1128 | |
| 1129 | /* Zero the RX buffer before populating. */ |
| 1130 | (void)memset(mbox->rx_buffer, 0, |
| 1131 | mbox->rxtx_page_count * FFA_PAGE_SIZE); |
| 1132 | |
| 1133 | /* |
| 1134 | * Depending on the FF-A version of the requesting partition |
| 1135 | * we may need to convert to a v1.0 format otherwise we can copy |
| 1136 | * directly. |
| 1137 | */ |
| 1138 | if (ffa_version == MAKE_FFA_VERSION(U(1), U(0))) { |
| 1139 | ret = partition_info_populate_v1_0(partitions, |
| 1140 | mbox, |
| 1141 | partition_count); |
| 1142 | if (ret != 0) { |
| 1143 | goto err_unlock; |
| 1144 | } |
| 1145 | } else { |
| 1146 | uint32_t buf_size = mbox->rxtx_page_count * |
| 1147 | FFA_PAGE_SIZE; |
| 1148 | |
| 1149 | /* Ensure the descriptor will fit in the buffer. */ |
| 1150 | size = sizeof(struct ffa_partition_info_v1_1); |
| 1151 | if (partition_count * size > buf_size) { |
| 1152 | ret = FFA_ERROR_NO_MEMORY; |
| 1153 | goto err_unlock; |
| 1154 | } |
| 1155 | memcpy(mbox->rx_buffer, partitions, |
| 1156 | partition_count * size); |
| 1157 | } |
| 1158 | |
| 1159 | mbox->state = MAILBOX_STATE_FULL; |
| 1160 | spin_unlock(&mbox->lock); |
| 1161 | } |
| 1162 | SMC_RET4(handle, FFA_SUCCESS_SMC32, 0, partition_count, size); |
| 1163 | |
| 1164 | err_unlock: |
| 1165 | spin_unlock(&mbox->lock); |
| 1166 | err: |
| 1167 | return spmc_ffa_error_return(handle, ret); |
| 1168 | } |
| 1169 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1170 | static uint64_t ffa_feature_success(void *handle, uint32_t arg2) |
| 1171 | { |
| 1172 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0, arg2); |
| 1173 | } |
| 1174 | |
| 1175 | static uint64_t ffa_features_retrieve_request(bool secure_origin, |
| 1176 | uint32_t input_properties, |
| 1177 | void *handle) |
| 1178 | { |
| 1179 | /* |
| 1180 | * If we're called by the normal world we don't support any |
| 1181 | * additional features. |
| 1182 | */ |
| 1183 | if (!secure_origin) { |
| 1184 | if ((input_properties & FFA_FEATURES_RET_REQ_NS_BIT) != 0U) { |
| 1185 | return spmc_ffa_error_return(handle, |
| 1186 | FFA_ERROR_NOT_SUPPORTED); |
| 1187 | } |
| 1188 | |
| 1189 | } else { |
| 1190 | struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
| 1191 | /* |
| 1192 | * If v1.1 the NS bit must be set otherwise it is an invalid |
| 1193 | * call. If v1.0 check and store whether the SP has requested |
| 1194 | * the use of the NS bit. |
| 1195 | */ |
| 1196 | if (sp->ffa_version == MAKE_FFA_VERSION(1, 1)) { |
| 1197 | if ((input_properties & |
| 1198 | FFA_FEATURES_RET_REQ_NS_BIT) == 0U) { |
| 1199 | return spmc_ffa_error_return(handle, |
| 1200 | FFA_ERROR_NOT_SUPPORTED); |
| 1201 | } |
| 1202 | return ffa_feature_success(handle, |
| 1203 | FFA_FEATURES_RET_REQ_NS_BIT); |
| 1204 | } else { |
| 1205 | sp->ns_bit_requested = (input_properties & |
| 1206 | FFA_FEATURES_RET_REQ_NS_BIT) != |
| 1207 | 0U; |
| 1208 | } |
| 1209 | if (sp->ns_bit_requested) { |
| 1210 | return ffa_feature_success(handle, |
| 1211 | FFA_FEATURES_RET_REQ_NS_BIT); |
| 1212 | } |
| 1213 | } |
| 1214 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1215 | } |
| 1216 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1217 | static uint64_t ffa_features_handler(uint32_t smc_fid, |
| 1218 | bool secure_origin, |
| 1219 | uint64_t x1, |
| 1220 | uint64_t x2, |
| 1221 | uint64_t x3, |
| 1222 | uint64_t x4, |
| 1223 | void *cookie, |
| 1224 | void *handle, |
| 1225 | uint64_t flags) |
| 1226 | { |
| 1227 | uint32_t function_id = (uint32_t) x1; |
| 1228 | uint32_t input_properties = (uint32_t) x2; |
| 1229 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1230 | /* Check if a Feature ID was requested. */ |
| 1231 | if ((function_id & FFA_FEATURES_BIT31_MASK) == 0U) { |
| 1232 | /* We currently don't support any additional features. */ |
| 1233 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1234 | } |
| 1235 | |
Marc Bonnici | 08f28ef | 2022-04-19 16:52:59 +0100 | [diff] [blame] | 1236 | /* |
| 1237 | * Handle the cases where we have separate handlers due to additional |
| 1238 | * properties. |
| 1239 | */ |
| 1240 | switch (function_id) { |
| 1241 | case FFA_MEM_RETRIEVE_REQ_SMC32: |
| 1242 | case FFA_MEM_RETRIEVE_REQ_SMC64: |
| 1243 | return ffa_features_retrieve_request(secure_origin, |
| 1244 | input_properties, |
| 1245 | handle); |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * We don't currently support additional input properties for these |
| 1250 | * other ABIs therefore ensure this value is set to 0. |
| 1251 | */ |
| 1252 | if (input_properties != 0U) { |
| 1253 | return spmc_ffa_error_return(handle, |
| 1254 | FFA_ERROR_NOT_SUPPORTED); |
| 1255 | } |
| 1256 | |
| 1257 | /* Report if any other FF-A ABI is supported. */ |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1258 | switch (function_id) { |
| 1259 | /* Supported features from both worlds. */ |
| 1260 | case FFA_ERROR: |
| 1261 | case FFA_SUCCESS_SMC32: |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 1262 | case FFA_INTERRUPT: |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 1263 | case FFA_SPM_ID_GET: |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 1264 | case FFA_ID_GET: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1265 | case FFA_FEATURES: |
| 1266 | case FFA_VERSION: |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 1267 | case FFA_RX_RELEASE: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1268 | case FFA_MSG_SEND_DIRECT_REQ_SMC32: |
| 1269 | case FFA_MSG_SEND_DIRECT_REQ_SMC64: |
| 1270 | case FFA_PARTITION_INFO_GET: |
| 1271 | case FFA_RXTX_MAP_SMC32: |
| 1272 | case FFA_RXTX_MAP_SMC64: |
| 1273 | case FFA_RXTX_UNMAP: |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1274 | case FFA_MEM_FRAG_TX: |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1275 | case FFA_MSG_RUN: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1276 | |
| 1277 | /* |
| 1278 | * We are relying on the fact that the other registers |
| 1279 | * will be set to 0 as these values align with the |
| 1280 | * currently implemented features of the SPMC. If this |
| 1281 | * changes this function must be extended to handle |
| 1282 | * reporting the additional functionality. |
| 1283 | */ |
| 1284 | |
| 1285 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1286 | /* Execution stops here. */ |
| 1287 | |
| 1288 | /* Supported ABIs only from the secure world. */ |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1289 | case FFA_SECONDARY_EP_REGISTER_SMC64: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1290 | case FFA_MSG_SEND_DIRECT_RESP_SMC32: |
| 1291 | case FFA_MSG_SEND_DIRECT_RESP_SMC64: |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1292 | case FFA_MEM_RELINQUISH: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1293 | case FFA_MSG_WAIT: |
Shruti Gupta | a5a1cbd | 2023-01-19 21:50:55 +0000 | [diff] [blame] | 1294 | case FFA_CONSOLE_LOG_SMC32: |
| 1295 | case FFA_CONSOLE_LOG_SMC64: |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1296 | |
| 1297 | if (!secure_origin) { |
| 1298 | return spmc_ffa_error_return(handle, |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 1299 | FFA_ERROR_NOT_SUPPORTED); |
| 1300 | } |
| 1301 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1302 | /* Execution stops here. */ |
| 1303 | |
| 1304 | /* Supported features only from the normal world. */ |
| 1305 | case FFA_MEM_SHARE_SMC32: |
| 1306 | case FFA_MEM_SHARE_SMC64: |
| 1307 | case FFA_MEM_LEND_SMC32: |
| 1308 | case FFA_MEM_LEND_SMC64: |
| 1309 | case FFA_MEM_RECLAIM: |
| 1310 | case FFA_MEM_FRAG_RX: |
| 1311 | |
| 1312 | if (secure_origin) { |
| 1313 | return spmc_ffa_error_return(handle, |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 1314 | FFA_ERROR_NOT_SUPPORTED); |
| 1315 | } |
| 1316 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1317 | /* Execution stops here. */ |
| 1318 | |
| 1319 | default: |
| 1320 | return spmc_ffa_error_return(handle, |
| 1321 | FFA_ERROR_NOT_SUPPORTED); |
| 1322 | } |
| 1323 | } |
| 1324 | |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 1325 | static uint64_t ffa_id_get_handler(uint32_t smc_fid, |
| 1326 | bool secure_origin, |
| 1327 | uint64_t x1, |
| 1328 | uint64_t x2, |
| 1329 | uint64_t x3, |
| 1330 | uint64_t x4, |
| 1331 | void *cookie, |
| 1332 | void *handle, |
| 1333 | uint64_t flags) |
| 1334 | { |
| 1335 | if (secure_origin) { |
| 1336 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, |
| 1337 | spmc_get_current_sp_ctx()->sp_id); |
| 1338 | } else { |
| 1339 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, |
| 1340 | spmc_get_hyp_ctx()->ns_ep_id); |
| 1341 | } |
| 1342 | } |
| 1343 | |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 1344 | /* |
| 1345 | * Enable an SP to query the ID assigned to the SPMC. |
| 1346 | */ |
| 1347 | static uint64_t ffa_spm_id_get_handler(uint32_t smc_fid, |
| 1348 | bool secure_origin, |
| 1349 | uint64_t x1, |
| 1350 | uint64_t x2, |
| 1351 | uint64_t x3, |
| 1352 | uint64_t x4, |
| 1353 | void *cookie, |
| 1354 | void *handle, |
| 1355 | uint64_t flags) |
| 1356 | { |
| 1357 | assert(x1 == 0UL); |
| 1358 | assert(x2 == 0UL); |
| 1359 | assert(x3 == 0UL); |
| 1360 | assert(x4 == 0UL); |
| 1361 | assert(SMC_GET_GP(handle, CTX_GPREG_X5) == 0UL); |
| 1362 | assert(SMC_GET_GP(handle, CTX_GPREG_X6) == 0UL); |
| 1363 | assert(SMC_GET_GP(handle, CTX_GPREG_X7) == 0UL); |
| 1364 | |
| 1365 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0x0, FFA_SPMC_ID); |
| 1366 | } |
| 1367 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1368 | static uint64_t ffa_run_handler(uint32_t smc_fid, |
| 1369 | bool secure_origin, |
| 1370 | uint64_t x1, |
| 1371 | uint64_t x2, |
| 1372 | uint64_t x3, |
| 1373 | uint64_t x4, |
| 1374 | void *cookie, |
| 1375 | void *handle, |
| 1376 | uint64_t flags) |
| 1377 | { |
| 1378 | struct secure_partition_desc *sp; |
| 1379 | uint16_t target_id = FFA_RUN_EP_ID(x1); |
| 1380 | uint16_t vcpu_id = FFA_RUN_VCPU_ID(x1); |
| 1381 | unsigned int idx; |
| 1382 | unsigned int *rt_state; |
| 1383 | unsigned int *rt_model; |
| 1384 | |
| 1385 | /* Can only be called from the normal world. */ |
| 1386 | if (secure_origin) { |
| 1387 | ERROR("FFA_RUN can only be called from NWd.\n"); |
| 1388 | return spmc_ffa_error_return(handle, |
| 1389 | FFA_ERROR_INVALID_PARAMETER); |
| 1390 | } |
| 1391 | |
| 1392 | /* Cannot run a Normal world partition. */ |
| 1393 | if (ffa_is_normal_world_id(target_id)) { |
| 1394 | ERROR("Cannot run a NWd partition (0x%x).\n", target_id); |
| 1395 | return spmc_ffa_error_return(handle, |
| 1396 | FFA_ERROR_INVALID_PARAMETER); |
| 1397 | } |
| 1398 | |
| 1399 | /* Check that the target SP exists. */ |
| 1400 | sp = spmc_get_sp_ctx(target_id); |
| 1401 | ERROR("Unknown partition ID (0x%x).\n", target_id); |
| 1402 | if (sp == NULL) { |
| 1403 | return spmc_ffa_error_return(handle, |
| 1404 | FFA_ERROR_INVALID_PARAMETER); |
| 1405 | } |
| 1406 | |
| 1407 | idx = get_ec_index(sp); |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1408 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1409 | if (idx != vcpu_id) { |
| 1410 | ERROR("Cannot run vcpu %d != %d.\n", idx, vcpu_id); |
| 1411 | return spmc_ffa_error_return(handle, |
| 1412 | FFA_ERROR_INVALID_PARAMETER); |
| 1413 | } |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1414 | if (sp->runtime_el == S_EL0) { |
| 1415 | spin_lock(&sp->rt_state_lock); |
| 1416 | } |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1417 | rt_state = &((sp->ec[idx]).rt_state); |
| 1418 | rt_model = &((sp->ec[idx]).rt_model); |
| 1419 | if (*rt_state == RT_STATE_RUNNING) { |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1420 | if (sp->runtime_el == S_EL0) { |
| 1421 | spin_unlock(&sp->rt_state_lock); |
| 1422 | } |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1423 | ERROR("Partition (0x%x) is already running.\n", target_id); |
| 1424 | return spmc_ffa_error_return(handle, FFA_ERROR_BUSY); |
| 1425 | } |
| 1426 | |
| 1427 | /* |
| 1428 | * Sanity check that if the execution context was not waiting then it |
| 1429 | * was either in the direct request or the run partition runtime model. |
| 1430 | */ |
| 1431 | if (*rt_state == RT_STATE_PREEMPTED || *rt_state == RT_STATE_BLOCKED) { |
| 1432 | assert(*rt_model == RT_MODEL_RUN || |
| 1433 | *rt_model == RT_MODEL_DIR_REQ); |
| 1434 | } |
| 1435 | |
| 1436 | /* |
| 1437 | * If the context was waiting then update the partition runtime model. |
| 1438 | */ |
| 1439 | if (*rt_state == RT_STATE_WAITING) { |
| 1440 | *rt_model = RT_MODEL_RUN; |
| 1441 | } |
| 1442 | |
| 1443 | /* |
| 1444 | * Forward the request to the correct SP vCPU after updating |
| 1445 | * its state. |
| 1446 | */ |
| 1447 | *rt_state = RT_STATE_RUNNING; |
| 1448 | |
Nishant Sharma | 32d340b | 2022-04-28 12:16:57 +0100 | [diff] [blame] | 1449 | if (sp->runtime_el == S_EL0) { |
| 1450 | spin_unlock(&sp->rt_state_lock); |
| 1451 | } |
| 1452 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 1453 | return spmc_smc_return(smc_fid, secure_origin, x1, 0, 0, 0, |
| 1454 | handle, cookie, flags, target_id); |
| 1455 | } |
| 1456 | |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 1457 | static uint64_t rx_release_handler(uint32_t smc_fid, |
| 1458 | bool secure_origin, |
| 1459 | uint64_t x1, |
| 1460 | uint64_t x2, |
| 1461 | uint64_t x3, |
| 1462 | uint64_t x4, |
| 1463 | void *cookie, |
| 1464 | void *handle, |
| 1465 | uint64_t flags) |
| 1466 | { |
| 1467 | struct mailbox *mbox = spmc_get_mbox_desc(secure_origin); |
| 1468 | |
| 1469 | spin_lock(&mbox->lock); |
| 1470 | |
| 1471 | if (mbox->state != MAILBOX_STATE_FULL) { |
| 1472 | spin_unlock(&mbox->lock); |
| 1473 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1474 | } |
| 1475 | |
| 1476 | mbox->state = MAILBOX_STATE_EMPTY; |
| 1477 | spin_unlock(&mbox->lock); |
| 1478 | |
| 1479 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1480 | } |
| 1481 | |
Shruti Gupta | a5a1cbd | 2023-01-19 21:50:55 +0000 | [diff] [blame] | 1482 | static uint64_t spmc_ffa_console_log(uint32_t smc_fid, |
| 1483 | bool secure_origin, |
| 1484 | uint64_t x1, |
| 1485 | uint64_t x2, |
| 1486 | uint64_t x3, |
| 1487 | uint64_t x4, |
| 1488 | void *cookie, |
| 1489 | void *handle, |
| 1490 | uint64_t flags) |
| 1491 | { |
| 1492 | char *chars; |
| 1493 | size_t chars_max; |
| 1494 | size_t chars_count = x1; |
| 1495 | |
| 1496 | /* Does not support request from Nwd. */ |
| 1497 | if (!secure_origin) { |
| 1498 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1499 | } |
| 1500 | |
| 1501 | assert(smc_fid == FFA_CONSOLE_LOG_SMC32 || smc_fid == FFA_CONSOLE_LOG_SMC64); |
| 1502 | if (smc_fid == FFA_CONSOLE_LOG_SMC32) { |
| 1503 | uint32_t registers[] = { |
| 1504 | (uint32_t)x2, |
| 1505 | (uint32_t)x3, |
| 1506 | (uint32_t)x4, |
| 1507 | (uint32_t)SMC_GET_GP(handle, CTX_GPREG_X5), |
| 1508 | (uint32_t)SMC_GET_GP(handle, CTX_GPREG_X6), |
| 1509 | (uint32_t)SMC_GET_GP(handle, CTX_GPREG_X7), |
| 1510 | }; |
| 1511 | chars_max = ARRAY_SIZE(registers) * sizeof(uint32_t); |
| 1512 | chars = (char *)registers; |
| 1513 | } else { |
| 1514 | uint64_t registers[] = { |
| 1515 | x2, |
| 1516 | x3, |
| 1517 | x4, |
| 1518 | SMC_GET_GP(handle, CTX_GPREG_X5), |
| 1519 | SMC_GET_GP(handle, CTX_GPREG_X6), |
| 1520 | SMC_GET_GP(handle, CTX_GPREG_X7), |
| 1521 | }; |
| 1522 | chars_max = ARRAY_SIZE(registers) * sizeof(uint64_t); |
| 1523 | chars = (char *)registers; |
| 1524 | } |
| 1525 | |
| 1526 | if ((chars_count == 0) || (chars_count > chars_max)) { |
| 1527 | return spmc_ffa_error_return(handle, FFA_ERROR_INVALID_PARAMETER); |
| 1528 | } |
| 1529 | |
| 1530 | for (size_t i = 0; (i < chars_count) && (chars[i] != '\0'); i++) { |
| 1531 | putchar(chars[i]); |
| 1532 | } |
| 1533 | |
| 1534 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1535 | } |
| 1536 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1537 | /* |
| 1538 | * Perform initial validation on the provided secondary entry point. |
| 1539 | * For now ensure it does not lie within the BL31 Image or the SP's |
| 1540 | * RX/TX buffers as these are mapped within EL3. |
| 1541 | * TODO: perform validation for additional invalid memory regions. |
| 1542 | */ |
| 1543 | static int validate_secondary_ep(uintptr_t ep, struct secure_partition_desc *sp) |
| 1544 | { |
| 1545 | struct mailbox *mb; |
| 1546 | uintptr_t buffer_size; |
| 1547 | uintptr_t sp_rx_buffer; |
| 1548 | uintptr_t sp_tx_buffer; |
| 1549 | uintptr_t sp_rx_buffer_limit; |
| 1550 | uintptr_t sp_tx_buffer_limit; |
| 1551 | |
| 1552 | mb = &sp->mailbox; |
| 1553 | buffer_size = (uintptr_t) (mb->rxtx_page_count * FFA_PAGE_SIZE); |
| 1554 | sp_rx_buffer = (uintptr_t) mb->rx_buffer; |
| 1555 | sp_tx_buffer = (uintptr_t) mb->tx_buffer; |
| 1556 | sp_rx_buffer_limit = sp_rx_buffer + buffer_size; |
| 1557 | sp_tx_buffer_limit = sp_tx_buffer + buffer_size; |
| 1558 | |
| 1559 | /* |
| 1560 | * Check if the entry point lies within BL31, or the |
| 1561 | * SP's RX or TX buffer. |
| 1562 | */ |
| 1563 | if ((ep >= BL31_BASE && ep < BL31_LIMIT) || |
| 1564 | (ep >= sp_rx_buffer && ep < sp_rx_buffer_limit) || |
| 1565 | (ep >= sp_tx_buffer && ep < sp_tx_buffer_limit)) { |
| 1566 | return -EINVAL; |
| 1567 | } |
| 1568 | return 0; |
| 1569 | } |
| 1570 | |
Marc Bonnici | 73fbe8f | 2021-12-09 11:32:30 +0000 | [diff] [blame] | 1571 | /******************************************************************************* |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1572 | * This function handles the FFA_SECONDARY_EP_REGISTER SMC to allow an SP to |
| 1573 | * register an entry point for initialization during a secondary cold boot. |
| 1574 | ******************************************************************************/ |
| 1575 | static uint64_t ffa_sec_ep_register_handler(uint32_t smc_fid, |
| 1576 | bool secure_origin, |
| 1577 | uint64_t x1, |
| 1578 | uint64_t x2, |
| 1579 | uint64_t x3, |
| 1580 | uint64_t x4, |
| 1581 | void *cookie, |
| 1582 | void *handle, |
| 1583 | uint64_t flags) |
| 1584 | { |
| 1585 | struct secure_partition_desc *sp; |
| 1586 | struct sp_exec_ctx *sp_ctx; |
| 1587 | |
| 1588 | /* This request cannot originate from the Normal world. */ |
| 1589 | if (!secure_origin) { |
| 1590 | WARN("%s: Can only be called from SWd.\n", __func__); |
| 1591 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1592 | } |
| 1593 | |
| 1594 | /* Get the context of the current SP. */ |
| 1595 | sp = spmc_get_current_sp_ctx(); |
| 1596 | if (sp == NULL) { |
| 1597 | WARN("%s: Cannot find SP context.\n", __func__); |
| 1598 | return spmc_ffa_error_return(handle, |
| 1599 | FFA_ERROR_INVALID_PARAMETER); |
| 1600 | } |
| 1601 | |
| 1602 | /* Only an S-EL1 SP should be invoking this ABI. */ |
| 1603 | if (sp->runtime_el != S_EL1) { |
| 1604 | WARN("%s: Can only be called for a S-EL1 SP.\n", __func__); |
| 1605 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1606 | } |
| 1607 | |
| 1608 | /* Ensure the SP is in its initialization state. */ |
| 1609 | sp_ctx = spmc_get_sp_ec(sp); |
| 1610 | if (sp_ctx->rt_model != RT_MODEL_INIT) { |
| 1611 | WARN("%s: Can only be called during SP initialization.\n", |
| 1612 | __func__); |
| 1613 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1614 | } |
| 1615 | |
| 1616 | /* Perform initial validation of the secondary entry point. */ |
| 1617 | if (validate_secondary_ep(x1, sp)) { |
| 1618 | WARN("%s: Invalid entry point provided (0x%lx).\n", |
| 1619 | __func__, x1); |
| 1620 | return spmc_ffa_error_return(handle, |
| 1621 | FFA_ERROR_INVALID_PARAMETER); |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Update the secondary entrypoint in SP context. |
| 1626 | * We don't need a lock here as during partition initialization there |
| 1627 | * will only be a single core online. |
| 1628 | */ |
| 1629 | sp->secondary_ep = x1; |
| 1630 | VERBOSE("%s: 0x%lx\n", __func__, sp->secondary_ep); |
| 1631 | |
| 1632 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1633 | } |
| 1634 | |
| 1635 | /******************************************************************************* |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 1636 | * Permissions are encoded using a different format in the FFA_MEM_PERM_* ABIs |
| 1637 | * than in the Trusted Firmware, where the mmap_attr_t enum type is used. This |
| 1638 | * function converts a permission value from the FF-A format to the mmap_attr_t |
| 1639 | * format by setting MT_RW/MT_RO, MT_USER/MT_PRIVILEGED and |
| 1640 | * MT_EXECUTE/MT_EXECUTE_NEVER. The other fields are left as 0 because they are |
| 1641 | * ignored by the function xlat_change_mem_attributes_ctx(). |
| 1642 | ******************************************************************************/ |
| 1643 | static unsigned int ffa_perm_to_mmap_perm(unsigned int perms) |
| 1644 | { |
| 1645 | unsigned int tf_attr = 0U; |
| 1646 | unsigned int access; |
| 1647 | |
| 1648 | /* Deal with data access permissions first. */ |
| 1649 | access = (perms & FFA_MEM_PERM_DATA_MASK) >> FFA_MEM_PERM_DATA_SHIFT; |
| 1650 | |
| 1651 | switch (access) { |
| 1652 | case FFA_MEM_PERM_DATA_RW: |
| 1653 | /* Return 0 if the execute is set with RW. */ |
| 1654 | if ((perms & FFA_MEM_PERM_INST_NON_EXEC) != 0) { |
| 1655 | tf_attr |= MT_RW | MT_USER | MT_EXECUTE_NEVER; |
| 1656 | } |
| 1657 | break; |
| 1658 | |
| 1659 | case FFA_MEM_PERM_DATA_RO: |
| 1660 | tf_attr |= MT_RO | MT_USER; |
| 1661 | /* Deal with the instruction access permissions next. */ |
| 1662 | if ((perms & FFA_MEM_PERM_INST_NON_EXEC) == 0) { |
| 1663 | tf_attr |= MT_EXECUTE; |
| 1664 | } else { |
| 1665 | tf_attr |= MT_EXECUTE_NEVER; |
| 1666 | } |
| 1667 | break; |
| 1668 | |
| 1669 | case FFA_MEM_PERM_DATA_NA: |
| 1670 | default: |
| 1671 | return tf_attr; |
| 1672 | } |
| 1673 | |
| 1674 | return tf_attr; |
| 1675 | } |
| 1676 | |
| 1677 | /******************************************************************************* |
| 1678 | * Handler to set the permissions of a set of contiguous pages of a S-EL0 SP |
| 1679 | ******************************************************************************/ |
| 1680 | static uint64_t ffa_mem_perm_set_handler(uint32_t smc_fid, |
| 1681 | bool secure_origin, |
| 1682 | uint64_t x1, |
| 1683 | uint64_t x2, |
| 1684 | uint64_t x3, |
| 1685 | uint64_t x4, |
| 1686 | void *cookie, |
| 1687 | void *handle, |
| 1688 | uint64_t flags) |
| 1689 | { |
| 1690 | struct secure_partition_desc *sp; |
| 1691 | unsigned int idx; |
| 1692 | uintptr_t base_va = (uintptr_t) x1; |
| 1693 | size_t size = (size_t)(x2 * PAGE_SIZE); |
| 1694 | uint32_t tf_attr; |
| 1695 | int ret; |
| 1696 | |
| 1697 | /* This request cannot originate from the Normal world. */ |
| 1698 | if (!secure_origin) { |
| 1699 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1700 | } |
| 1701 | |
| 1702 | if (size == 0) { |
| 1703 | return spmc_ffa_error_return(handle, |
| 1704 | FFA_ERROR_INVALID_PARAMETER); |
| 1705 | } |
| 1706 | |
| 1707 | /* Get the context of the current SP. */ |
| 1708 | sp = spmc_get_current_sp_ctx(); |
| 1709 | if (sp == NULL) { |
| 1710 | return spmc_ffa_error_return(handle, |
| 1711 | FFA_ERROR_INVALID_PARAMETER); |
| 1712 | } |
| 1713 | |
| 1714 | /* A S-EL1 SP has no business invoking this ABI. */ |
| 1715 | if (sp->runtime_el == S_EL1) { |
| 1716 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1717 | } |
| 1718 | |
| 1719 | if ((x3 & ~((uint64_t)FFA_MEM_PERM_MASK)) != 0) { |
| 1720 | return spmc_ffa_error_return(handle, |
| 1721 | FFA_ERROR_INVALID_PARAMETER); |
| 1722 | } |
| 1723 | |
| 1724 | /* Get the execution context of the calling SP. */ |
| 1725 | idx = get_ec_index(sp); |
| 1726 | |
| 1727 | /* |
| 1728 | * Ensure that the S-EL0 SP is initialising itself. We do not need to |
| 1729 | * synchronise this operation through a spinlock since a S-EL0 SP is UP |
| 1730 | * and can only be initialising on this cpu. |
| 1731 | */ |
| 1732 | if (sp->ec[idx].rt_model != RT_MODEL_INIT) { |
| 1733 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1734 | } |
| 1735 | |
| 1736 | VERBOSE("Setting memory permissions:\n"); |
| 1737 | VERBOSE(" Start address : 0x%lx\n", base_va); |
| 1738 | VERBOSE(" Number of pages: %lu (%zu bytes)\n", x2, size); |
| 1739 | VERBOSE(" Attributes : 0x%x\n", (uint32_t)x3); |
| 1740 | |
| 1741 | /* Convert inbound permissions to TF-A permission attributes */ |
| 1742 | tf_attr = ffa_perm_to_mmap_perm((unsigned int)x3); |
| 1743 | if (tf_attr == 0U) { |
| 1744 | return spmc_ffa_error_return(handle, |
| 1745 | FFA_ERROR_INVALID_PARAMETER); |
| 1746 | } |
| 1747 | |
| 1748 | /* Request the change in permissions */ |
| 1749 | ret = xlat_change_mem_attributes_ctx(sp->xlat_ctx_handle, |
| 1750 | base_va, size, tf_attr); |
| 1751 | if (ret != 0) { |
| 1752 | return spmc_ffa_error_return(handle, |
| 1753 | FFA_ERROR_INVALID_PARAMETER); |
| 1754 | } |
| 1755 | |
| 1756 | SMC_RET1(handle, FFA_SUCCESS_SMC32); |
| 1757 | } |
| 1758 | |
| 1759 | /******************************************************************************* |
| 1760 | * Permissions are encoded using a different format in the FFA_MEM_PERM_* ABIs |
| 1761 | * than in the Trusted Firmware, where the mmap_attr_t enum type is used. This |
| 1762 | * function converts a permission value from the mmap_attr_t format to the FF-A |
| 1763 | * format. |
| 1764 | ******************************************************************************/ |
| 1765 | static unsigned int mmap_perm_to_ffa_perm(unsigned int attr) |
| 1766 | { |
| 1767 | unsigned int perms = 0U; |
| 1768 | unsigned int data_access; |
| 1769 | |
| 1770 | if ((attr & MT_USER) == 0) { |
| 1771 | /* No access from EL0. */ |
| 1772 | data_access = FFA_MEM_PERM_DATA_NA; |
| 1773 | } else { |
| 1774 | if ((attr & MT_RW) != 0) { |
| 1775 | data_access = FFA_MEM_PERM_DATA_RW; |
| 1776 | } else { |
| 1777 | data_access = FFA_MEM_PERM_DATA_RO; |
| 1778 | } |
| 1779 | } |
| 1780 | |
| 1781 | perms |= (data_access & FFA_MEM_PERM_DATA_MASK) |
| 1782 | << FFA_MEM_PERM_DATA_SHIFT; |
| 1783 | |
| 1784 | if ((attr & MT_EXECUTE_NEVER) != 0U) { |
| 1785 | perms |= FFA_MEM_PERM_INST_NON_EXEC; |
| 1786 | } |
| 1787 | |
| 1788 | return perms; |
| 1789 | } |
| 1790 | |
| 1791 | /******************************************************************************* |
| 1792 | * Handler to get the permissions of a set of contiguous pages of a S-EL0 SP |
| 1793 | ******************************************************************************/ |
| 1794 | static uint64_t ffa_mem_perm_get_handler(uint32_t smc_fid, |
| 1795 | bool secure_origin, |
| 1796 | uint64_t x1, |
| 1797 | uint64_t x2, |
| 1798 | uint64_t x3, |
| 1799 | uint64_t x4, |
| 1800 | void *cookie, |
| 1801 | void *handle, |
| 1802 | uint64_t flags) |
| 1803 | { |
| 1804 | struct secure_partition_desc *sp; |
| 1805 | unsigned int idx; |
| 1806 | uintptr_t base_va = (uintptr_t)x1; |
| 1807 | uint32_t tf_attr = 0; |
| 1808 | int ret; |
| 1809 | |
| 1810 | /* This request cannot originate from the Normal world. */ |
| 1811 | if (!secure_origin) { |
| 1812 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 1813 | } |
| 1814 | |
| 1815 | /* Get the context of the current SP. */ |
| 1816 | sp = spmc_get_current_sp_ctx(); |
| 1817 | if (sp == NULL) { |
| 1818 | return spmc_ffa_error_return(handle, |
| 1819 | FFA_ERROR_INVALID_PARAMETER); |
| 1820 | } |
| 1821 | |
| 1822 | /* A S-EL1 SP has no business invoking this ABI. */ |
| 1823 | if (sp->runtime_el == S_EL1) { |
| 1824 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1825 | } |
| 1826 | |
| 1827 | /* Get the execution context of the calling SP. */ |
| 1828 | idx = get_ec_index(sp); |
| 1829 | |
| 1830 | /* |
| 1831 | * Ensure that the S-EL0 SP is initialising itself. We do not need to |
| 1832 | * synchronise this operation through a spinlock since a S-EL0 SP is UP |
| 1833 | * and can only be initialising on this cpu. |
| 1834 | */ |
| 1835 | if (sp->ec[idx].rt_model != RT_MODEL_INIT) { |
| 1836 | return spmc_ffa_error_return(handle, FFA_ERROR_DENIED); |
| 1837 | } |
| 1838 | |
| 1839 | /* Request the permissions */ |
| 1840 | ret = xlat_get_mem_attributes_ctx(sp->xlat_ctx_handle, base_va, &tf_attr); |
| 1841 | if (ret != 0) { |
| 1842 | return spmc_ffa_error_return(handle, |
| 1843 | FFA_ERROR_INVALID_PARAMETER); |
| 1844 | } |
| 1845 | |
| 1846 | /* Convert TF-A permission to FF-A permissions attributes. */ |
| 1847 | x2 = mmap_perm_to_ffa_perm(tf_attr); |
| 1848 | |
| 1849 | SMC_RET3(handle, FFA_SUCCESS_SMC32, 0, x2); |
| 1850 | } |
| 1851 | |
| 1852 | /******************************************************************************* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1853 | * This function will parse the Secure Partition Manifest. From manifest, it |
| 1854 | * will fetch details for preparing Secure partition image context and secure |
| 1855 | * partition image boot arguments if any. |
| 1856 | ******************************************************************************/ |
| 1857 | static int sp_manifest_parse(void *sp_manifest, int offset, |
| 1858 | struct secure_partition_desc *sp, |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 1859 | entry_point_info_t *ep_info, |
| 1860 | int32_t *boot_info_reg) |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1861 | { |
| 1862 | int32_t ret, node; |
| 1863 | uint32_t config_32; |
| 1864 | |
| 1865 | /* |
| 1866 | * Look for the mandatory fields that are expected to be present in |
| 1867 | * the SP manifests. |
| 1868 | */ |
| 1869 | node = fdt_path_offset(sp_manifest, "/"); |
| 1870 | if (node < 0) { |
| 1871 | ERROR("Did not find root node.\n"); |
| 1872 | return node; |
| 1873 | } |
| 1874 | |
Marc Bonnici | 21e644d | 2021-08-24 11:31:52 +0100 | [diff] [blame] | 1875 | ret = fdt_read_uint32_array(sp_manifest, node, "uuid", |
| 1876 | ARRAY_SIZE(sp->uuid), sp->uuid); |
| 1877 | if (ret != 0) { |
| 1878 | ERROR("Missing Secure Partition UUID.\n"); |
| 1879 | return ret; |
| 1880 | } |
| 1881 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1882 | ret = fdt_read_uint32(sp_manifest, node, "exception-level", &config_32); |
| 1883 | if (ret != 0) { |
| 1884 | ERROR("Missing SP Exception Level information.\n"); |
| 1885 | return ret; |
| 1886 | } |
| 1887 | |
| 1888 | sp->runtime_el = config_32; |
| 1889 | |
| 1890 | ret = fdt_read_uint32(sp_manifest, node, "ffa-version", &config_32); |
| 1891 | if (ret != 0) { |
| 1892 | ERROR("Missing Secure Partition FF-A Version.\n"); |
| 1893 | return ret; |
| 1894 | } |
| 1895 | |
| 1896 | sp->ffa_version = config_32; |
| 1897 | |
| 1898 | ret = fdt_read_uint32(sp_manifest, node, "execution-state", &config_32); |
| 1899 | if (ret != 0) { |
| 1900 | ERROR("Missing Secure Partition Execution State.\n"); |
| 1901 | return ret; |
| 1902 | } |
| 1903 | |
| 1904 | sp->execution_state = config_32; |
| 1905 | |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1906 | ret = fdt_read_uint32(sp_manifest, node, |
Marc Bonnici | f524489 | 2021-12-09 18:34:02 +0000 | [diff] [blame] | 1907 | "messaging-method", &config_32); |
| 1908 | if (ret != 0) { |
| 1909 | ERROR("Missing Secure Partition messaging method.\n"); |
| 1910 | return ret; |
| 1911 | } |
| 1912 | |
| 1913 | /* Validate this entry, we currently only support direct messaging. */ |
| 1914 | if ((config_32 & ~(FFA_PARTITION_DIRECT_REQ_RECV | |
| 1915 | FFA_PARTITION_DIRECT_REQ_SEND)) != 0U) { |
| 1916 | WARN("Invalid Secure Partition messaging method (0x%x)\n", |
| 1917 | config_32); |
| 1918 | return -EINVAL; |
| 1919 | } |
| 1920 | |
| 1921 | sp->properties = config_32; |
| 1922 | |
| 1923 | ret = fdt_read_uint32(sp_manifest, node, |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1924 | "execution-ctx-count", &config_32); |
| 1925 | |
| 1926 | if (ret != 0) { |
| 1927 | ERROR("Missing SP Execution Context Count.\n"); |
| 1928 | return ret; |
| 1929 | } |
| 1930 | |
| 1931 | /* |
| 1932 | * Ensure this field is set correctly in the manifest however |
| 1933 | * since this is currently a hardcoded value for S-EL1 partitions |
| 1934 | * we don't need to save it here, just validate. |
| 1935 | */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 1936 | if ((sp->runtime_el == S_EL1) && (config_32 != PLATFORM_CORE_COUNT)) { |
Marc Bonnici | eec0d04 | 2021-12-09 10:51:05 +0000 | [diff] [blame] | 1937 | ERROR("SP Execution Context Count (%u) must be %u.\n", |
| 1938 | config_32, PLATFORM_CORE_COUNT); |
| 1939 | return -EINVAL; |
| 1940 | } |
| 1941 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1942 | /* |
| 1943 | * Look for the optional fields that are expected to be present in |
| 1944 | * an SP manifest. |
| 1945 | */ |
| 1946 | ret = fdt_read_uint32(sp_manifest, node, "id", &config_32); |
| 1947 | if (ret != 0) { |
| 1948 | WARN("Missing Secure Partition ID.\n"); |
| 1949 | } else { |
| 1950 | if (!is_ffa_secure_id_valid(config_32)) { |
| 1951 | ERROR("Invalid Secure Partition ID (0x%x).\n", |
| 1952 | config_32); |
| 1953 | return -EINVAL; |
| 1954 | } |
| 1955 | sp->sp_id = config_32; |
| 1956 | } |
| 1957 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1958 | ret = fdt_read_uint32(sp_manifest, node, |
| 1959 | "power-management-messages", &config_32); |
| 1960 | if (ret != 0) { |
| 1961 | WARN("Missing Power Management Messages entry.\n"); |
| 1962 | } else { |
Nishant Sharma | a3ddb3b | 2022-04-28 14:28:44 +0100 | [diff] [blame] | 1963 | if ((sp->runtime_el == S_EL0) && (config_32 != 0)) { |
| 1964 | ERROR("Power messages not supported for S-EL0 SP\n"); |
| 1965 | return -EINVAL; |
| 1966 | } |
| 1967 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 1968 | /* |
| 1969 | * Ensure only the currently supported power messages have |
| 1970 | * been requested. |
| 1971 | */ |
| 1972 | if (config_32 & ~(FFA_PM_MSG_SUB_CPU_OFF | |
| 1973 | FFA_PM_MSG_SUB_CPU_SUSPEND | |
| 1974 | FFA_PM_MSG_SUB_CPU_SUSPEND_RESUME)) { |
| 1975 | ERROR("Requested unsupported PM messages (%x)\n", |
| 1976 | config_32); |
| 1977 | return -EINVAL; |
| 1978 | } |
| 1979 | sp->pwr_mgmt_msgs = config_32; |
| 1980 | } |
| 1981 | |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 1982 | ret = fdt_read_uint32(sp_manifest, node, |
| 1983 | "gp-register-num", &config_32); |
| 1984 | if (ret != 0) { |
| 1985 | WARN("Missing boot information register.\n"); |
| 1986 | } else { |
| 1987 | /* Check if a register number between 0-3 is specified. */ |
| 1988 | if (config_32 < 4) { |
| 1989 | *boot_info_reg = config_32; |
| 1990 | } else { |
| 1991 | WARN("Incorrect boot information register (%u).\n", |
| 1992 | config_32); |
| 1993 | } |
| 1994 | } |
| 1995 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 1996 | return 0; |
| 1997 | } |
| 1998 | |
| 1999 | /******************************************************************************* |
| 2000 | * This function gets the Secure Partition Manifest base and maps the manifest |
| 2001 | * region. |
| 2002 | * Currently only one Secure Partition manifest is considered which is used to |
| 2003 | * prepare the context for the single Secure Partition. |
| 2004 | ******************************************************************************/ |
| 2005 | static int find_and_prepare_sp_context(void) |
| 2006 | { |
| 2007 | void *sp_manifest; |
| 2008 | uintptr_t manifest_base; |
| 2009 | uintptr_t manifest_base_align; |
| 2010 | entry_point_info_t *next_image_ep_info; |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 2011 | int32_t ret, boot_info_reg = -1; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2012 | struct secure_partition_desc *sp; |
| 2013 | |
| 2014 | next_image_ep_info = bl31_plat_get_next_image_ep_info(SECURE); |
| 2015 | if (next_image_ep_info == NULL) { |
| 2016 | WARN("No Secure Partition image provided by BL2.\n"); |
| 2017 | return -ENOENT; |
| 2018 | } |
| 2019 | |
| 2020 | sp_manifest = (void *)next_image_ep_info->args.arg0; |
| 2021 | if (sp_manifest == NULL) { |
| 2022 | WARN("Secure Partition manifest absent.\n"); |
| 2023 | return -ENOENT; |
| 2024 | } |
| 2025 | |
| 2026 | manifest_base = (uintptr_t)sp_manifest; |
| 2027 | manifest_base_align = page_align(manifest_base, DOWN); |
| 2028 | |
| 2029 | /* |
| 2030 | * Map the secure partition manifest region in the EL3 translation |
| 2031 | * regime. |
| 2032 | * Map an area equal to (2 * PAGE_SIZE) for now. During manifest base |
| 2033 | * alignment the region of 1 PAGE_SIZE from manifest align base may |
| 2034 | * not completely accommodate the secure partition manifest region. |
| 2035 | */ |
| 2036 | ret = mmap_add_dynamic_region((unsigned long long)manifest_base_align, |
| 2037 | manifest_base_align, |
| 2038 | PAGE_SIZE * 2, |
| 2039 | MT_RO_DATA); |
| 2040 | if (ret != 0) { |
| 2041 | ERROR("Error while mapping SP manifest (%d).\n", ret); |
| 2042 | return ret; |
| 2043 | } |
| 2044 | |
| 2045 | ret = fdt_node_offset_by_compatible(sp_manifest, -1, |
| 2046 | "arm,ffa-manifest-1.0"); |
| 2047 | if (ret < 0) { |
| 2048 | ERROR("Error happened in SP manifest reading.\n"); |
| 2049 | return -EINVAL; |
| 2050 | } |
| 2051 | |
| 2052 | /* |
| 2053 | * Store the size of the manifest so that it can be used later to pass |
| 2054 | * the manifest as boot information later. |
| 2055 | */ |
| 2056 | next_image_ep_info->args.arg1 = fdt_totalsize(sp_manifest); |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2057 | INFO("Manifest adr = %lx , size = %lu bytes\n", manifest_base, |
| 2058 | next_image_ep_info->args.arg1); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2059 | |
| 2060 | /* |
| 2061 | * Select an SP descriptor for initialising the partition's execution |
| 2062 | * context on the primary CPU. |
| 2063 | */ |
| 2064 | sp = spmc_get_current_sp_ctx(); |
| 2065 | |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2066 | #if SPMC_AT_EL3_SEL0_SP |
| 2067 | /* Assign translation tables context. */ |
| 2068 | sp_desc->xlat_ctx_handle = spm_get_sp_xlat_context(); |
| 2069 | |
| 2070 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2071 | /* Initialize entry point information for the SP */ |
| 2072 | SET_PARAM_HEAD(next_image_ep_info, PARAM_EP, VERSION_1, |
| 2073 | SECURE | EP_ST_ENABLE); |
| 2074 | |
| 2075 | /* Parse the SP manifest. */ |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 2076 | ret = sp_manifest_parse(sp_manifest, ret, sp, next_image_ep_info, |
| 2077 | &boot_info_reg); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2078 | if (ret != 0) { |
| 2079 | ERROR("Error in Secure Partition manifest parsing.\n"); |
| 2080 | return ret; |
| 2081 | } |
| 2082 | |
| 2083 | /* Check that the runtime EL in the manifest was correct. */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2084 | if (sp->runtime_el != S_EL0 && sp->runtime_el != S_EL1) { |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2085 | ERROR("Unexpected runtime EL: %d\n", sp->runtime_el); |
| 2086 | return -EINVAL; |
| 2087 | } |
| 2088 | |
| 2089 | /* Perform any common initialisation. */ |
Achin Gupta | eaf1716 | 2021-10-19 12:21:16 +0100 | [diff] [blame] | 2090 | spmc_sp_common_setup(sp, next_image_ep_info, boot_info_reg); |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2091 | |
| 2092 | /* Perform any initialisation specific to S-EL1 SPs. */ |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2093 | if (sp->runtime_el == S_EL1) { |
| 2094 | spmc_el1_sp_setup(sp, next_image_ep_info); |
| 2095 | } |
| 2096 | |
| 2097 | #if SPMC_AT_EL3_SEL0_SP |
| 2098 | /* Setup spsr in endpoint info for common context management routine. */ |
| 2099 | if (sp->runtime_el == S_EL0) { |
| 2100 | spmc_el0_sp_spsr_setup(next_image_ep_info); |
| 2101 | } |
| 2102 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2103 | |
| 2104 | /* Initialize the SP context with the required ep info. */ |
| 2105 | spmc_sp_common_ep_commit(sp, next_image_ep_info); |
| 2106 | |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2107 | #if SPMC_AT_EL3_SEL0_SP |
| 2108 | /* |
| 2109 | * Perform any initialisation specific to S-EL0 not set by common |
| 2110 | * context management routine. |
| 2111 | */ |
| 2112 | if (sp->runtime_el == S_EL0) { |
Nishant Sharma | 6817bdb | 2022-04-28 11:52:07 +0100 | [diff] [blame] | 2113 | spmc_el0_sp_setup(sp, boot_info_reg, sp_manifest); |
Nishant Sharma | 9dc905b | 2022-04-28 10:58:24 +0100 | [diff] [blame] | 2114 | } |
| 2115 | #endif /* SPMC_AT_EL3_SEL0_SP */ |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2116 | return 0; |
| 2117 | } |
| 2118 | |
| 2119 | /******************************************************************************* |
| 2120 | * This function takes an SP context pointer and performs a synchronous entry |
| 2121 | * into it. |
| 2122 | ******************************************************************************/ |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 2123 | static int32_t logical_sp_init(void) |
| 2124 | { |
| 2125 | int32_t rc = 0; |
| 2126 | struct el3_lp_desc *el3_lp_descs; |
| 2127 | |
| 2128 | /* Perform initial validation of the Logical Partitions. */ |
| 2129 | rc = el3_sp_desc_validate(); |
| 2130 | if (rc != 0) { |
| 2131 | ERROR("Logical Partition validation failed!\n"); |
| 2132 | return rc; |
| 2133 | } |
| 2134 | |
| 2135 | el3_lp_descs = get_el3_lp_array(); |
| 2136 | |
| 2137 | INFO("Logical Secure Partition init start.\n"); |
| 2138 | for (unsigned int i = 0U; i < EL3_LP_DESCS_COUNT; i++) { |
| 2139 | rc = el3_lp_descs[i].init(); |
| 2140 | if (rc != 0) { |
| 2141 | ERROR("Logical SP (0x%x) Failed to Initialize\n", |
| 2142 | el3_lp_descs[i].sp_id); |
| 2143 | return rc; |
| 2144 | } |
| 2145 | VERBOSE("Logical SP (0x%x) Initialized\n", |
| 2146 | el3_lp_descs[i].sp_id); |
| 2147 | } |
| 2148 | |
| 2149 | INFO("Logical Secure Partition init completed.\n"); |
| 2150 | |
| 2151 | return rc; |
| 2152 | } |
| 2153 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2154 | uint64_t spmc_sp_synchronous_entry(struct sp_exec_ctx *ec) |
| 2155 | { |
| 2156 | uint64_t rc; |
| 2157 | |
| 2158 | assert(ec != NULL); |
| 2159 | |
| 2160 | /* Assign the context of the SP to this CPU */ |
| 2161 | cm_set_context(&(ec->cpu_ctx), SECURE); |
| 2162 | |
| 2163 | /* Restore the context assigned above */ |
| 2164 | cm_el1_sysregs_context_restore(SECURE); |
| 2165 | cm_set_next_eret_context(SECURE); |
| 2166 | |
| 2167 | /* Invalidate TLBs at EL1. */ |
| 2168 | tlbivmalle1(); |
| 2169 | dsbish(); |
| 2170 | |
| 2171 | /* Enter Secure Partition */ |
| 2172 | rc = spm_secure_partition_enter(&ec->c_rt_ctx); |
| 2173 | |
| 2174 | /* Save secure state */ |
| 2175 | cm_el1_sysregs_context_save(SECURE); |
| 2176 | |
| 2177 | return rc; |
| 2178 | } |
| 2179 | |
| 2180 | /******************************************************************************* |
| 2181 | * SPMC Helper Functions. |
| 2182 | ******************************************************************************/ |
| 2183 | static int32_t sp_init(void) |
| 2184 | { |
| 2185 | uint64_t rc; |
| 2186 | struct secure_partition_desc *sp; |
| 2187 | struct sp_exec_ctx *ec; |
| 2188 | |
| 2189 | sp = spmc_get_current_sp_ctx(); |
| 2190 | ec = spmc_get_sp_ec(sp); |
| 2191 | ec->rt_model = RT_MODEL_INIT; |
| 2192 | ec->rt_state = RT_STATE_RUNNING; |
| 2193 | |
| 2194 | INFO("Secure Partition (0x%x) init start.\n", sp->sp_id); |
| 2195 | |
| 2196 | rc = spmc_sp_synchronous_entry(ec); |
| 2197 | if (rc != 0) { |
| 2198 | /* Indicate SP init was not successful. */ |
| 2199 | ERROR("SP (0x%x) failed to initialize (%lu).\n", |
| 2200 | sp->sp_id, rc); |
| 2201 | return 0; |
| 2202 | } |
| 2203 | |
| 2204 | ec->rt_state = RT_STATE_WAITING; |
| 2205 | INFO("Secure Partition initialized.\n"); |
| 2206 | |
| 2207 | return 1; |
| 2208 | } |
| 2209 | |
| 2210 | static void initalize_sp_descs(void) |
| 2211 | { |
| 2212 | struct secure_partition_desc *sp; |
| 2213 | |
| 2214 | for (unsigned int i = 0U; i < SECURE_PARTITION_COUNT; i++) { |
| 2215 | sp = &sp_desc[i]; |
| 2216 | sp->sp_id = INV_SP_ID; |
Marc Bonnici | ecc460a | 2021-09-02 13:18:41 +0100 | [diff] [blame] | 2217 | sp->mailbox.rx_buffer = NULL; |
| 2218 | sp->mailbox.tx_buffer = NULL; |
| 2219 | sp->mailbox.state = MAILBOX_STATE_EMPTY; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2220 | sp->secondary_ep = 0; |
| 2221 | } |
| 2222 | } |
| 2223 | |
| 2224 | static void initalize_ns_ep_descs(void) |
| 2225 | { |
| 2226 | struct ns_endpoint_desc *ns_ep; |
| 2227 | |
| 2228 | for (unsigned int i = 0U; i < NS_PARTITION_COUNT; i++) { |
| 2229 | ns_ep = &ns_ep_desc[i]; |
| 2230 | /* |
| 2231 | * Clashes with the Hypervisor ID but will not be a |
| 2232 | * problem in practice. |
| 2233 | */ |
| 2234 | ns_ep->ns_ep_id = 0; |
| 2235 | ns_ep->ffa_version = 0; |
Marc Bonnici | ecc460a | 2021-09-02 13:18:41 +0100 | [diff] [blame] | 2236 | ns_ep->mailbox.rx_buffer = NULL; |
| 2237 | ns_ep->mailbox.tx_buffer = NULL; |
| 2238 | ns_ep->mailbox.state = MAILBOX_STATE_EMPTY; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2239 | } |
| 2240 | } |
| 2241 | |
| 2242 | /******************************************************************************* |
Marc Bonnici | 1c33cc3 | 2021-11-29 17:57:03 +0000 | [diff] [blame] | 2243 | * Initialize SPMC attributes for the SPMD. |
| 2244 | ******************************************************************************/ |
| 2245 | void spmc_populate_attrs(spmc_manifest_attribute_t *spmc_attrs) |
| 2246 | { |
| 2247 | spmc_attrs->major_version = FFA_VERSION_MAJOR; |
| 2248 | spmc_attrs->minor_version = FFA_VERSION_MINOR; |
| 2249 | spmc_attrs->exec_state = MODE_RW_64; |
| 2250 | spmc_attrs->spmc_id = FFA_SPMC_ID; |
| 2251 | } |
| 2252 | |
| 2253 | /******************************************************************************* |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2254 | * Initialize contexts of all Secure Partitions. |
| 2255 | ******************************************************************************/ |
| 2256 | int32_t spmc_setup(void) |
| 2257 | { |
| 2258 | int32_t ret; |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2259 | uint32_t flags; |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2260 | |
| 2261 | /* Initialize endpoint descriptors */ |
| 2262 | initalize_sp_descs(); |
| 2263 | initalize_ns_ep_descs(); |
| 2264 | |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 2265 | /* |
| 2266 | * Retrieve the information of the datastore for tracking shared memory |
| 2267 | * requests allocated by platform code and zero the region if available. |
| 2268 | */ |
| 2269 | ret = plat_spmc_shmem_datastore_get(&spmc_shmem_obj_state.data, |
| 2270 | &spmc_shmem_obj_state.data_size); |
| 2271 | if (ret != 0) { |
| 2272 | ERROR("Failed to obtain memory descriptor backing store!\n"); |
| 2273 | return ret; |
| 2274 | } |
| 2275 | memset(spmc_shmem_obj_state.data, 0, spmc_shmem_obj_state.data_size); |
| 2276 | |
Marc Bonnici | 9a29704 | 2022-02-14 17:06:09 +0000 | [diff] [blame] | 2277 | /* Setup logical SPs. */ |
| 2278 | ret = logical_sp_init(); |
| 2279 | if (ret != 0) { |
| 2280 | ERROR("Failed to initialize Logical Partitions.\n"); |
| 2281 | return ret; |
| 2282 | } |
| 2283 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2284 | /* Perform physical SP setup. */ |
| 2285 | |
| 2286 | /* Disable MMU at EL1 (initialized by BL2) */ |
| 2287 | disable_mmu_icache_el1(); |
| 2288 | |
| 2289 | /* Initialize context of the SP */ |
| 2290 | INFO("Secure Partition context setup start.\n"); |
| 2291 | |
| 2292 | ret = find_and_prepare_sp_context(); |
| 2293 | if (ret != 0) { |
| 2294 | ERROR("Error in SP finding and context preparation.\n"); |
| 2295 | return ret; |
| 2296 | } |
| 2297 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 2298 | /* Register power management hooks with PSCI */ |
| 2299 | psci_register_spd_pm_hook(&spmc_pm); |
| 2300 | |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2301 | /* |
| 2302 | * Register an interrupt handler for S-EL1 interrupts |
| 2303 | * when generated during code executing in the |
| 2304 | * non-secure state. |
| 2305 | */ |
| 2306 | flags = 0; |
| 2307 | set_interrupt_rm_flag(flags, NON_SECURE); |
| 2308 | ret = register_interrupt_type_handler(INTR_TYPE_S_EL1, |
| 2309 | spmc_sp_interrupt_handler, |
| 2310 | flags); |
| 2311 | if (ret != 0) { |
| 2312 | ERROR("Failed to register interrupt handler! (%d)\n", ret); |
| 2313 | panic(); |
| 2314 | } |
| 2315 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2316 | /* Register init function for deferred init. */ |
| 2317 | bl31_register_bl32_init(&sp_init); |
| 2318 | |
| 2319 | INFO("Secure Partition setup done.\n"); |
| 2320 | |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | /******************************************************************************* |
| 2325 | * Secure Partition Manager SMC handler. |
| 2326 | ******************************************************************************/ |
| 2327 | uint64_t spmc_smc_handler(uint32_t smc_fid, |
| 2328 | bool secure_origin, |
| 2329 | uint64_t x1, |
| 2330 | uint64_t x2, |
| 2331 | uint64_t x3, |
| 2332 | uint64_t x4, |
| 2333 | void *cookie, |
| 2334 | void *handle, |
| 2335 | uint64_t flags) |
| 2336 | { |
| 2337 | switch (smc_fid) { |
| 2338 | |
Marc Bonnici | e95eb7c | 2021-12-08 14:24:03 +0000 | [diff] [blame] | 2339 | case FFA_VERSION: |
| 2340 | return ffa_version_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2341 | x4, cookie, handle, flags); |
| 2342 | |
Marc Bonnici | 38add67 | 2021-11-25 15:54:52 +0000 | [diff] [blame] | 2343 | case FFA_SPM_ID_GET: |
| 2344 | return ffa_spm_id_get_handler(smc_fid, secure_origin, x1, x2, |
| 2345 | x3, x4, cookie, handle, flags); |
| 2346 | |
Marc Bonnici | faa4a76 | 2021-11-24 15:40:00 +0000 | [diff] [blame] | 2347 | case FFA_ID_GET: |
| 2348 | return ffa_id_get_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2349 | x4, cookie, handle, flags); |
| 2350 | |
Marc Bonnici | d4bb245 | 2021-12-13 11:08:59 +0000 | [diff] [blame] | 2351 | case FFA_FEATURES: |
| 2352 | return ffa_features_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2353 | x4, cookie, handle, flags); |
| 2354 | |
Marc Bonnici | 25f4b54 | 2022-04-12 17:18:13 +0100 | [diff] [blame] | 2355 | case FFA_SECONDARY_EP_REGISTER_SMC64: |
| 2356 | return ffa_sec_ep_register_handler(smc_fid, secure_origin, x1, |
| 2357 | x2, x3, x4, cookie, handle, |
| 2358 | flags); |
| 2359 | |
Marc Bonnici | 5eeacd5 | 2021-11-29 17:05:57 +0000 | [diff] [blame] | 2360 | case FFA_MSG_SEND_DIRECT_REQ_SMC32: |
| 2361 | case FFA_MSG_SEND_DIRECT_REQ_SMC64: |
| 2362 | return direct_req_smc_handler(smc_fid, secure_origin, x1, x2, |
| 2363 | x3, x4, cookie, handle, flags); |
| 2364 | |
| 2365 | case FFA_MSG_SEND_DIRECT_RESP_SMC32: |
| 2366 | case FFA_MSG_SEND_DIRECT_RESP_SMC64: |
| 2367 | return direct_resp_smc_handler(smc_fid, secure_origin, x1, x2, |
| 2368 | x3, x4, cookie, handle, flags); |
| 2369 | |
Marc Bonnici | 0cf1a15 | 2021-08-25 12:09:37 +0100 | [diff] [blame] | 2370 | case FFA_RXTX_MAP_SMC32: |
| 2371 | case FFA_RXTX_MAP_SMC64: |
| 2372 | return rxtx_map_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2373 | cookie, handle, flags); |
| 2374 | |
| 2375 | case FFA_RXTX_UNMAP: |
| 2376 | return rxtx_unmap_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2377 | x4, cookie, handle, flags); |
| 2378 | |
Marc Bonnici | 37dd8e1 | 2021-08-17 18:00:07 +0100 | [diff] [blame] | 2379 | case FFA_PARTITION_INFO_GET: |
| 2380 | return partition_info_get_handler(smc_fid, secure_origin, x1, |
| 2381 | x2, x3, x4, cookie, handle, |
| 2382 | flags); |
| 2383 | |
Marc Bonnici | cb17d31 | 2022-04-12 17:17:45 +0100 | [diff] [blame] | 2384 | case FFA_RX_RELEASE: |
| 2385 | return rx_release_handler(smc_fid, secure_origin, x1, x2, x3, |
| 2386 | x4, cookie, handle, flags); |
| 2387 | |
Marc Bonnici | 8eb1520 | 2021-11-29 17:05:33 +0000 | [diff] [blame] | 2388 | case FFA_MSG_WAIT: |
| 2389 | return msg_wait_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2390 | cookie, handle, flags); |
| 2391 | |
Marc Bonnici | b4e9984 | 2021-12-10 09:21:56 +0000 | [diff] [blame] | 2392 | case FFA_ERROR: |
| 2393 | return ffa_error_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2394 | cookie, handle, flags); |
| 2395 | |
Marc Bonnici | 764e667 | 2021-08-31 17:57:04 +0100 | [diff] [blame] | 2396 | case FFA_MSG_RUN: |
| 2397 | return ffa_run_handler(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2398 | cookie, handle, flags); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 2399 | |
| 2400 | case FFA_MEM_SHARE_SMC32: |
| 2401 | case FFA_MEM_SHARE_SMC64: |
| 2402 | case FFA_MEM_LEND_SMC32: |
| 2403 | case FFA_MEM_LEND_SMC64: |
| 2404 | return spmc_ffa_mem_send(smc_fid, secure_origin, x1, x2, x3, x4, |
| 2405 | cookie, handle, flags); |
| 2406 | |
| 2407 | case FFA_MEM_FRAG_TX: |
| 2408 | return spmc_ffa_mem_frag_tx(smc_fid, secure_origin, x1, x2, x3, |
| 2409 | x4, cookie, handle, flags); |
| 2410 | |
| 2411 | case FFA_MEM_FRAG_RX: |
| 2412 | return spmc_ffa_mem_frag_rx(smc_fid, secure_origin, x1, x2, x3, |
| 2413 | x4, cookie, handle, flags); |
| 2414 | |
| 2415 | case FFA_MEM_RETRIEVE_REQ_SMC32: |
| 2416 | case FFA_MEM_RETRIEVE_REQ_SMC64: |
| 2417 | return spmc_ffa_mem_retrieve_req(smc_fid, secure_origin, x1, x2, |
| 2418 | x3, x4, cookie, handle, flags); |
| 2419 | |
| 2420 | case FFA_MEM_RELINQUISH: |
| 2421 | return spmc_ffa_mem_relinquish(smc_fid, secure_origin, x1, x2, |
| 2422 | x3, x4, cookie, handle, flags); |
| 2423 | |
| 2424 | case FFA_MEM_RECLAIM: |
| 2425 | return spmc_ffa_mem_reclaim(smc_fid, secure_origin, x1, x2, x3, |
Shruti Gupta | a5a1cbd | 2023-01-19 21:50:55 +0000 | [diff] [blame] | 2426 | x4, cookie, handle, flags); |
| 2427 | case FFA_CONSOLE_LOG_SMC32: |
| 2428 | case FFA_CONSOLE_LOG_SMC64: |
| 2429 | return spmc_ffa_console_log(smc_fid, secure_origin, x1, x2, x3, |
| 2430 | x4, cookie, handle, flags); |
Marc Bonnici | 9f23c8d | 2021-10-01 16:06:04 +0100 | [diff] [blame] | 2431 | |
Nishant Sharma | 789052c | 2022-03-25 23:52:34 +0000 | [diff] [blame] | 2432 | case FFA_MEM_PERM_GET: |
| 2433 | return ffa_mem_perm_get_handler(smc_fid, secure_origin, x1, x2, |
| 2434 | x3, x4, cookie, handle, flags); |
| 2435 | |
| 2436 | case FFA_MEM_PERM_SET: |
| 2437 | return ffa_mem_perm_set_handler(smc_fid, secure_origin, x1, x2, |
| 2438 | x3, x4, cookie, handle, flags); |
| 2439 | |
Marc Bonnici | 8e1a755 | 2021-12-01 17:57:04 +0000 | [diff] [blame] | 2440 | default: |
| 2441 | WARN("Unsupported FF-A call 0x%08x.\n", smc_fid); |
| 2442 | break; |
| 2443 | } |
| 2444 | return spmc_ffa_error_return(handle, FFA_ERROR_NOT_SUPPORTED); |
| 2445 | } |
Achin Gupta | 2ec5dbe | 2021-10-04 20:17:45 +0100 | [diff] [blame] | 2446 | |
| 2447 | /******************************************************************************* |
| 2448 | * This function is the handler registered for S-EL1 interrupts by the SPMC. It |
| 2449 | * validates the interrupt and upon success arranges entry into the SP for |
| 2450 | * handling the interrupt. |
| 2451 | ******************************************************************************/ |
| 2452 | static uint64_t spmc_sp_interrupt_handler(uint32_t id, |
| 2453 | uint32_t flags, |
| 2454 | void *handle, |
| 2455 | void *cookie) |
| 2456 | { |
| 2457 | struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
| 2458 | struct sp_exec_ctx *ec; |
| 2459 | uint32_t linear_id = plat_my_core_pos(); |
| 2460 | |
| 2461 | /* Sanity check for a NULL pointer dereference. */ |
| 2462 | assert(sp != NULL); |
| 2463 | |
| 2464 | /* Check the security state when the exception was generated. */ |
| 2465 | assert(get_interrupt_src_ss(flags) == NON_SECURE); |
| 2466 | |
| 2467 | /* Panic if not an S-EL1 Partition. */ |
| 2468 | if (sp->runtime_el != S_EL1) { |
| 2469 | ERROR("Interrupt received for a non S-EL1 SP on core%u.\n", |
| 2470 | linear_id); |
| 2471 | panic(); |
| 2472 | } |
| 2473 | |
| 2474 | /* Obtain a reference to the SP execution context. */ |
| 2475 | ec = spmc_get_sp_ec(sp); |
| 2476 | |
| 2477 | /* Ensure that the execution context is in waiting state else panic. */ |
| 2478 | if (ec->rt_state != RT_STATE_WAITING) { |
| 2479 | ERROR("SP EC on core%u is not waiting (%u), it is (%u).\n", |
| 2480 | linear_id, RT_STATE_WAITING, ec->rt_state); |
| 2481 | panic(); |
| 2482 | } |
| 2483 | |
| 2484 | /* Update the runtime model and state of the partition. */ |
| 2485 | ec->rt_model = RT_MODEL_INTR; |
| 2486 | ec->rt_state = RT_STATE_RUNNING; |
| 2487 | |
| 2488 | VERBOSE("SP (0x%x) interrupt start on core%u.\n", sp->sp_id, linear_id); |
| 2489 | |
| 2490 | /* |
| 2491 | * Forward the interrupt to the S-EL1 SP. The interrupt ID is not |
| 2492 | * populated as the SP can determine this by itself. |
| 2493 | */ |
| 2494 | return spmd_smc_switch_state(FFA_INTERRUPT, false, |
| 2495 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 2496 | FFA_PARAM_MBZ, FFA_PARAM_MBZ, |
| 2497 | handle); |
| 2498 | } |