arch/arm/mach-imx/imx8/ahab.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2018-2019 NXP
   4  */
   5
   6 #include <common.h>
   7 #include <errno.h>
   8 #include <asm/io.h>
   9 #include <asm/arch/sci/sci.h>
  10 #include <asm/mach-imx/sys_proto.h>
  11 #include <asm/arch-imx/cpu.h>
  12 #include <asm/arch/sys_proto.h>
  13 #include <asm/arch/image.h>
  14 #include <console.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #define SEC_SECURE_RAM_BASE             (0x31800000UL)
  19 #define SEC_SECURE_RAM_END_BASE         (SEC_SECURE_RAM_BASE + 0xFFFFUL)
  20 #define SECO_LOCAL_SEC_SEC_SECURE_RAM_BASE  (0x60000000UL)
  21
  22 #define SECO_PT                 2U
  23
  24 static inline bool check_in_dram(ulong addr)
  25 {
  26         int i;
  27         bd_t *bd = gd->bd;
  28
  29         for (i = 0; i < CONFIG_NR_DRAM_BANKS; ++i) {
  30                 if (bd->bi_dram[i].size) {
  31                         if (addr >= bd->bi_dram[i].start &&
  32                             addr < (bd->bi_dram[i].start + bd->bi_dram[i].size))
  33                                 return true;
  34                 }
  35         }
  36
  37         return false;
  38 }
  39
  40 int authenticate_os_container(ulong addr)
  41 {
  42         struct container_hdr *phdr;
  43         int i, ret = 0;
  44         int err;
  45         sc_rm_mr_t mr;
  46         sc_faddr_t start, end;
  47         u16 length;
  48         struct boot_img_t *img;
  49         unsigned long s, e;
  50
  51         if (addr % 4) {
  52                 puts("Error: Image's address is not 4 byte aligned\n");
  53                 return -EINVAL;
  54         }
  55
  56         if (!check_in_dram(addr)) {
  57                 puts("Error: Image's address is invalid\n");
  58                 return -EINVAL;
  59         }
  60
  61         phdr = (struct container_hdr *)addr;
  62         if (phdr->tag != 0x87 && phdr->version != 0x0) {
  63                 printf("Error: Wrong container header\n");
  64                 return -EFAULT;
  65         }
  66
  67         if (!phdr->num_images) {
  68                 printf("Error: Wrong container, no image found\n");
  69                 return -EFAULT;
  70         }
  71
  72         length = phdr->length_lsb + (phdr->length_msb << 8);
  73
  74         debug("container length %u\n", length);
  75         memcpy((void *)SEC_SECURE_RAM_BASE, (const void *)addr,
  76                ALIGN(length, CONFIG_SYS_CACHELINE_SIZE));
  77
  78         err = sc_seco_authenticate(-1, SC_SECO_AUTH_CONTAINER,
  79                                    SECO_LOCAL_SEC_SEC_SECURE_RAM_BASE);
  80         if (err) {
  81                 printf("Authenticate container hdr failed, return %d\n",
  82                        err);
  83                 ret = -EIO;
  84                 goto exit;
  85         }
  86
  87         /* Copy images to dest address */
  88         for (i = 0; i < phdr->num_images; i++) {
  89                 img = (struct boot_img_t *)(addr +
  90                                             sizeof(struct container_hdr) +
  91                                             i * sizeof(struct boot_img_t));
  92
  93                 debug("img %d, dst 0x%llx, src 0x%lx, size 0x%x\n",
  94                       i, img->dst, img->offset + addr, img->size);
  95
  96                 memcpy((void *)img->dst, (const void *)(img->offset + addr),
  97                        img->size);
  98
  99                 s = img->dst & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
 100                 e = ALIGN(img->dst + img->size, CONFIG_SYS_CACHELINE_SIZE);
 101
 102                 flush_dcache_range(s, e);
 103
 104                 /* Find the memreg and set permission for seco pt */
 105                 err = sc_rm_find_memreg(-1, &mr, s, e);
 106                 if (err) {
 107                         printf("Not found memreg for image: %d, error %d\n",
 108                                i, err);
 109                         ret = -ENOMEM;
 110                         goto exit;
 111                 }
 112
 113                 err = sc_rm_get_memreg_info(-1, mr, &start, &end);
 114                 if (!err)
 115                         debug("memreg %u 0x%llx -- 0x%llx\n", mr, start, end);
 116
 117                 err = sc_rm_set_memreg_permissions(-1, mr, SECO_PT,
 118                                                    SC_RM_PERM_FULL);
 119                 if (err) {
 120                         printf("Set permission failed for img %d, error %d\n",
 121                                i, err);
 122                         ret = -EPERM;
 123                         goto exit;
 124                 }
 125
 126                 err = sc_seco_authenticate(-1, SC_SECO_VERIFY_IMAGE,
 127                                            (1 << i));
 128                 if (err) {
 129                         printf("Authenticate img %d failed, return %d\n",
 130                                i, err);
 131                         ret = -EIO;
 132                 }
 133
 134                 err = sc_rm_set_memreg_permissions(-1, mr, SECO_PT,
 135                                                    SC_RM_PERM_NONE);
 136                 if (err) {
 137                         printf("Remove permission failed for img %d, err %d\n",
 138                                i, err);
 139                         ret = -EPERM;
 140                 }
 141
 142                 if (ret)
 143                         goto exit;
 144         }
 145
 146 exit:
 147         if (sc_seco_authenticate(-1, SC_SECO_REL_CONTAINER, 0) != SC_ERR_NONE)
 148                 printf("Error: release container failed!\n");
 149
 150         return ret;
 151 }
 152
 153 static int do_authenticate(cmd_tbl_t *cmdtp, int flag, int argc,
 154                            char * const argv[])
 155 {
 156         ulong addr;
 157
 158         if (argc < 2)
 159                 return CMD_RET_USAGE;
 160
 161         addr = simple_strtoul(argv[1], NULL, 16);
 162
 163         printf("Authenticate OS container at 0x%lx\n", addr);
 164
 165         if (authenticate_os_container(addr))
 166                 return CMD_RET_FAILURE;
 167
 168         return CMD_RET_SUCCESS;
 169 }
 170
 171 static void display_life_cycle(u16 lc)
 172 {
 173         printf("Lifecycle: 0x%04X, ", lc);
 174         switch (lc) {
 175         case 0x1:
 176                 printf("Pristine\n\n");
 177                 break;
 178         case 0x2:
 179                 printf("Fab\n\n");
 180                 break;
 181         case 0x8:
 182                 printf("Open\n\n");
 183                 break;
 184         case 0x20:
 185                 printf("NXP closed\n\n");
 186                 break;
 187         case 0x80:
 188                 printf("OEM closed\n\n");
 189                 break;
 190         case 0x100:
 191                 printf("Partial field return\n\n");
 192                 break;
 193         case 0x200:
 194                 printf("Full field return\n\n");
 195                 break;
 196         case 0x400:
 197                 printf("No return\n\n");
 198                 break;
 199         default:
 200                 printf("Unknown\n\n");
 201                 break;
 202         }
 203 }
 204
 205 #define AHAB_AUTH_CONTAINER_REQ 0x87
 206 #define AHAB_VERIFY_IMAGE_REQ 0x88
 207
 208 #define AHAB_NO_AUTHENTICATION_IND 0xee
 209 #define AHAB_BAD_KEY_HASH_IND 0xfa
 210 #define AHAB_INVALID_KEY_IND 0xf9
 211 #define AHAB_BAD_SIGNATURE_IND 0xf0
 212 #define AHAB_BAD_HASH_IND 0xf1
 213
 214 static void display_ahab_auth_event(u32 event)
 215 {
 216         u8 cmd = (event >> 16) & 0xff;
 217         u8 resp_ind = (event >> 8) & 0xff;
 218
 219         switch (cmd) {
 220         case AHAB_AUTH_CONTAINER_REQ:
 221                 printf("\tCMD = AHAB_AUTH_CONTAINER_REQ (0x%02X)\n", cmd);
 222                 printf("\tIND = ");
 223                 break;
 224         case AHAB_VERIFY_IMAGE_REQ:
 225                 printf("\tCMD = AHAB_VERIFY_IMAGE_REQ (0x%02X)\n", cmd);
 226                 printf("\tIND = ");
 227                 break;
 228         default:
 229                 return;
 230         }
 231
 232         switch (resp_ind) {
 233         case AHAB_NO_AUTHENTICATION_IND:
 234                 printf("AHAB_NO_AUTHENTICATION_IND (0x%02X)\n\n", resp_ind);
 235                 break;
 236         case AHAB_BAD_KEY_HASH_IND:
 237                 printf("AHAB_BAD_KEY_HASH_IND (0x%02X)\n\n", resp_ind);
 238                 break;
 239         case AHAB_INVALID_KEY_IND:
 240                 printf("AHAB_INVALID_KEY_IND (0x%02X)\n\n", resp_ind);
 241                 break;
 242         case AHAB_BAD_SIGNATURE_IND:
 243                 printf("AHAB_BAD_SIGNATURE_IND (0x%02X)\n\n", resp_ind);
 244                 break;
 245         case AHAB_BAD_HASH_IND:
 246                 printf("AHAB_BAD_HASH_IND (0x%02X)\n\n", resp_ind);
 247                 break;
 248         default:
 249                 printf("Unknown Indicator (0x%02X)\n\n", resp_ind);
 250                 break;
 251         }
 252 }
 253
 254 static int do_ahab_status(cmd_tbl_t *cmdtp, int flag, int argc,
 255                           char * const argv[])
 256 {
 257         int err;
 258         u8 idx = 0U;
 259         u32 event;
 260         u16 lc;
 261
 262         err = sc_seco_chip_info(-1, &lc, NULL, NULL, NULL);
 263         if (err != SC_ERR_NONE) {
 264                 printf("Error in get lifecycle\n");
 265                 return -EIO;
 266         }
 267
 268         display_life_cycle(lc);
 269
 270         err = sc_seco_get_event(-1, idx, &event);
 271         while (err == SC_ERR_NONE) {
 272                 printf("SECO Event[%u] = 0x%08X\n", idx, event);
 273                 display_ahab_auth_event(event);
 274
 275                 idx++;
 276                 err = sc_seco_get_event(-1, idx, &event);
 277         }
 278
 279         if (idx == 0)
 280                 printf("No SECO Events Found!\n\n");
 281
 282         return 0;
 283 }
 284
 285 static int confirm_close(void)
 286 {
 287         puts("Warning: Please ensure your sample is in NXP closed state, "
 288              "OEM SRK hash has been fused, \n"
 289              "         and you are able to boot a signed image successfully "
 290              "without any SECO events reported.\n"
 291              "         If not, your sample will be unrecoverable.\n"
 292              "\nReally perform this operation? <y/N>\n");
 293
 294         if (confirm_yesno())
 295                 return 1;
 296
 297         puts("Ahab close aborted\n");
 298         return 0;
 299 }
 300
 301 static int do_ahab_close(cmd_tbl_t *cmdtp, int flag, int argc,
 302                          char * const argv[])
 303 {
 304         int err;
 305         u16 lc;
 306
 307         if (!confirm_close())
 308                 return -EACCES;
 309
 310         err = sc_seco_chip_info(-1, &lc, NULL, NULL, NULL);
 311         if (err != SC_ERR_NONE) {
 312                 printf("Error in get lifecycle\n");
 313                 return -EIO;
 314         }
 315
 316         if (lc != 0x20) {
 317                 puts("Current lifecycle is NOT NXP closed, can't move to OEM closed\n");
 318                 display_life_cycle(lc);
 319                 return -EPERM;
 320         }
 321
 322         err = sc_seco_forward_lifecycle(-1, 16);
 323         if (err != SC_ERR_NONE) {
 324                 printf("Error in forward lifecycle to OEM closed\n");
 325                 return -EIO;
 326         }
 327
 328         printf("Change to OEM closed successfully\n");
 329
 330         return 0;
 331 }
 332
 333 U_BOOT_CMD(auth_cntr, CONFIG_SYS_MAXARGS, 1, do_authenticate,
 334            "autenticate OS container via AHAB",
 335            "addr\n"
 336            "addr - OS container hex address\n"
 337 );
 338
 339 U_BOOT_CMD(ahab_status, CONFIG_SYS_MAXARGS, 1, do_ahab_status,
 340            "display AHAB lifecycle and events from seco",
 341            ""
 342 );
 343
 344 U_BOOT_CMD(ahab_close, CONFIG_SYS_MAXARGS, 1, do_ahab_close,
 345            "Change AHAB lifecycle to OEM closed",
 346            ""
 347 );