arch/x86/kernel/kexec-bzimage64.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Kexec bzImage loader
   4  *
   5  * Copyright (C) 2014 Red Hat Inc.
   6  * Authors:
   7  *      Vivek Goyal <vgoyal@redhat.com>
   8  */
   9
  10 #define pr_fmt(fmt)     "kexec-bzImage64: " fmt
  11
  12 #include <linux/string.h>
  13 #include <linux/printk.h>
  14 #include <linux/errno.h>
  15 #include <linux/slab.h>
  16 #include <linux/kexec.h>
  17 #include <linux/kernel.h>
  18 #include <linux/mm.h>
  19 #include <linux/efi.h>
  20 #include <linux/random.h>
  21
  22 #include <asm/bootparam.h>
  23 #include <asm/setup.h>
  24 #include <asm/crash.h>
  25 #include <asm/efi.h>
  26 #include <asm/e820/api.h>
  27 #include <asm/kexec-bzimage64.h>
  28
  29 #define MAX_ELFCOREHDR_STR_LEN  30      /* elfcorehdr=0x<64bit-value> */
  30
  31 /*
  32  * Defines lowest physical address for various segments. Not sure where
  33  * exactly these limits came from. Current bzimage64 loader in kexec-tools
  34  * uses these so I am retaining it. It can be changed over time as we gain
  35  * more insight.
  36  */
  37 #define MIN_PURGATORY_ADDR      0x3000
  38 #define MIN_BOOTPARAM_ADDR      0x3000
  39 #define MIN_KERNEL_LOAD_ADDR    0x100000
  40 #define MIN_INITRD_LOAD_ADDR    0x1000000
  41
  42 /*
  43  * This is a place holder for all boot loader specific data structure which
  44  * gets allocated in one call but gets freed much later during cleanup
  45  * time. Right now there is only one field but it can grow as need be.
  46  */
  47 struct bzimage64_data {
  48         /*
  49          * Temporary buffer to hold bootparams buffer. This should be
  50          * freed once the bootparam segment has been loaded.
  51          */
  52         void *bootparams_buf;
  53 };
  54
  55 static int setup_initrd(struct boot_params *params,
  56                 unsigned long initrd_load_addr, unsigned long initrd_len)
  57 {
  58         params->hdr.ramdisk_image = initrd_load_addr & 0xffffffffUL;
  59         params->hdr.ramdisk_size = initrd_len & 0xffffffffUL;
  60
  61         params->ext_ramdisk_image = initrd_load_addr >> 32;
  62         params->ext_ramdisk_size = initrd_len >> 32;
  63
  64         return 0;
  65 }
  66
  67 static int setup_cmdline(struct kimage *image, struct boot_params *params,
  68                          unsigned long bootparams_load_addr,
  69                          unsigned long cmdline_offset, char *cmdline,
  70                          unsigned long cmdline_len)
  71 {
  72         char *cmdline_ptr = ((char *)params) + cmdline_offset;
  73         unsigned long cmdline_ptr_phys, len = 0;
  74         uint32_t cmdline_low_32, cmdline_ext_32;
  75
  76         if (image->type == KEXEC_TYPE_CRASH) {
  77                 len = sprintf(cmdline_ptr,
  78                         "elfcorehdr=0x%lx ", image->elf_load_addr);
  79         }
  80         memcpy(cmdline_ptr + len, cmdline, cmdline_len);
  81         cmdline_len += len;
  82
  83         cmdline_ptr[cmdline_len - 1] = '\0';
  84
  85         kexec_dprintk("Final command line is: %s\n", cmdline_ptr);
  86         cmdline_ptr_phys = bootparams_load_addr + cmdline_offset;
  87         cmdline_low_32 = cmdline_ptr_phys & 0xffffffffUL;
  88         cmdline_ext_32 = cmdline_ptr_phys >> 32;
  89
  90         params->hdr.cmd_line_ptr = cmdline_low_32;
  91         if (cmdline_ext_32)
  92                 params->ext_cmd_line_ptr = cmdline_ext_32;
  93
  94         return 0;
  95 }
  96
  97 static int setup_e820_entries(struct boot_params *params)
  98 {
  99         unsigned int nr_e820_entries;
 100
 101         nr_e820_entries = e820_table_kexec->nr_entries;
 102
 103         /* TODO: Pass entries more than E820_MAX_ENTRIES_ZEROPAGE in bootparams setup data */
 104         if (nr_e820_entries > E820_MAX_ENTRIES_ZEROPAGE)
 105                 nr_e820_entries = E820_MAX_ENTRIES_ZEROPAGE;
 106
 107         params->e820_entries = nr_e820_entries;
 108         memcpy(&params->e820_table, &e820_table_kexec->entries, nr_e820_entries*sizeof(struct e820_entry));
 109
 110         return 0;
 111 }
 112
 113 enum { RNG_SEED_LENGTH = 32 };
 114
 115 static void
 116 setup_rng_seed(struct boot_params *params, unsigned long params_load_addr,
 117                unsigned int rng_seed_setup_data_offset)
 118 {
 119         struct setup_data *sd = (void *)params + rng_seed_setup_data_offset;
 120         unsigned long setup_data_phys;
 121
 122         if (!rng_is_initialized())
 123                 return;
 124
 125         sd->type = SETUP_RNG_SEED;
 126         sd->len = RNG_SEED_LENGTH;
 127         get_random_bytes(sd->data, RNG_SEED_LENGTH);
 128         setup_data_phys = params_load_addr + rng_seed_setup_data_offset;
 129         sd->next = params->hdr.setup_data;
 130         params->hdr.setup_data = setup_data_phys;
 131 }
 132
 133 #ifdef CONFIG_EFI
 134 static int setup_efi_info_memmap(struct boot_params *params,
 135                                   unsigned long params_load_addr,
 136                                   unsigned int efi_map_offset,
 137                                   unsigned int efi_map_sz)
 138 {
 139         void *efi_map = (void *)params + efi_map_offset;
 140         unsigned long efi_map_phys_addr = params_load_addr + efi_map_offset;
 141         struct efi_info *ei = &params->efi_info;
 142
 143         if (!efi_map_sz)
 144                 return 0;
 145
 146         efi_runtime_map_copy(efi_map, efi_map_sz);
 147
 148         ei->efi_memmap = efi_map_phys_addr & 0xffffffff;
 149         ei->efi_memmap_hi = efi_map_phys_addr >> 32;
 150         ei->efi_memmap_size = efi_map_sz;
 151
 152         return 0;
 153 }
 154
 155 static int
 156 prepare_add_efi_setup_data(struct boot_params *params,
 157                        unsigned long params_load_addr,
 158                        unsigned int efi_setup_data_offset)
 159 {
 160         unsigned long setup_data_phys;
 161         struct setup_data *sd = (void *)params + efi_setup_data_offset;
 162         struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data);
 163
 164         esd->fw_vendor = efi_fw_vendor;
 165         esd->tables = efi_config_table;
 166         esd->smbios = efi.smbios;
 167
 168         sd->type = SETUP_EFI;
 169         sd->len = sizeof(struct efi_setup_data);
 170
 171         /* Add setup data */
 172         setup_data_phys = params_load_addr + efi_setup_data_offset;
 173         sd->next = params->hdr.setup_data;
 174         params->hdr.setup_data = setup_data_phys;
 175
 176         return 0;
 177 }
 178
 179 static int
 180 setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
 181                 unsigned int efi_map_offset, unsigned int efi_map_sz,
 182                 unsigned int efi_setup_data_offset)
 183 {
 184         struct efi_info *current_ei = &boot_params.efi_info;
 185         struct efi_info *ei = &params->efi_info;
 186
 187         if (!efi_enabled(EFI_RUNTIME_SERVICES))
 188                 return 0;
 189
 190         if (!current_ei->efi_memmap_size)
 191                 return 0;
 192
 193         params->secure_boot = boot_params.secure_boot;
 194         ei->efi_loader_signature = current_ei->efi_loader_signature;
 195         ei->efi_systab = current_ei->efi_systab;
 196         ei->efi_systab_hi = current_ei->efi_systab_hi;
 197
 198         ei->efi_memdesc_version = current_ei->efi_memdesc_version;
 199         ei->efi_memdesc_size = efi_get_runtime_map_desc_size();
 200
 201         setup_efi_info_memmap(params, params_load_addr, efi_map_offset,
 202                               efi_map_sz);
 203         prepare_add_efi_setup_data(params, params_load_addr,
 204                                    efi_setup_data_offset);
 205         return 0;
 206 }
 207 #endif /* CONFIG_EFI */
 208
 209 static void
 210 setup_ima_state(const struct kimage *image, struct boot_params *params,
 211                 unsigned long params_load_addr,
 212                 unsigned int ima_setup_data_offset)
 213 {
 214 #ifdef CONFIG_IMA_KEXEC
 215         struct setup_data *sd = (void *)params + ima_setup_data_offset;
 216         unsigned long setup_data_phys;
 217         struct ima_setup_data *ima;
 218
 219         if (!image->ima_buffer_size)
 220                 return;
 221
 222         sd->type = SETUP_IMA;
 223         sd->len = sizeof(*ima);
 224
 225         ima = (void *)sd + sizeof(struct setup_data);
 226         ima->addr = image->ima_buffer_addr;
 227         ima->size = image->ima_buffer_size;
 228
 229         /* Add setup data */
 230         setup_data_phys = params_load_addr + ima_setup_data_offset;
 231         sd->next = params->hdr.setup_data;
 232         params->hdr.setup_data = setup_data_phys;
 233 #endif /* CONFIG_IMA_KEXEC */
 234 }
 235
 236 static int
 237 setup_boot_parameters(struct kimage *image, struct boot_params *params,
 238                       unsigned long params_load_addr,
 239                       unsigned int efi_map_offset, unsigned int efi_map_sz,
 240                       unsigned int setup_data_offset)
 241 {
 242         unsigned int nr_e820_entries;
 243         unsigned long long mem_k, start, end;
 244         int i, ret = 0;
 245
 246         /* Get subarch from existing bootparams */
 247         params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch;
 248
 249         /* Copying screen_info will do? */
 250         memcpy(&params->screen_info, &screen_info, sizeof(struct screen_info));
 251
 252         /* Fill in memsize later */
 253         params->screen_info.ext_mem_k = 0;
 254         params->alt_mem_k = 0;
 255
 256         /* Always fill in RSDP: it is either 0 or a valid value */
 257         params->acpi_rsdp_addr = boot_params.acpi_rsdp_addr;
 258
 259         /* Default APM info */
 260         memset(&params->apm_bios_info, 0, sizeof(params->apm_bios_info));
 261
 262         /* Default drive info */
 263         memset(&params->hd0_info, 0, sizeof(params->hd0_info));
 264         memset(&params->hd1_info, 0, sizeof(params->hd1_info));
 265
 266 #ifdef CONFIG_CRASH_DUMP
 267         if (image->type == KEXEC_TYPE_CRASH) {
 268                 ret = crash_setup_memmap_entries(image, params);
 269                 if (ret)
 270                         return ret;
 271         } else
 272 #endif
 273                 setup_e820_entries(params);
 274
 275         nr_e820_entries = params->e820_entries;
 276
 277         kexec_dprintk("E820 memmap:\n");
 278         for (i = 0; i < nr_e820_entries; i++) {
 279                 kexec_dprintk("%016llx-%016llx (%d)\n",
 280                               params->e820_table[i].addr,
 281                               params->e820_table[i].addr + params->e820_table[i].size - 1,
 282                               params->e820_table[i].type);
 283                 if (params->e820_table[i].type != E820_TYPE_RAM)
 284                         continue;
 285                 start = params->e820_table[i].addr;
 286                 end = params->e820_table[i].addr + params->e820_table[i].size - 1;
 287
 288                 if ((start <= 0x100000) && end > 0x100000) {
 289                         mem_k = (end >> 10) - (0x100000 >> 10);
 290                         params->screen_info.ext_mem_k = mem_k;
 291                         params->alt_mem_k = mem_k;
 292                         if (mem_k > 0xfc00)
 293                                 params->screen_info.ext_mem_k = 0xfc00; /* 64M*/
 294                         if (mem_k > 0xffffffff)
 295                                 params->alt_mem_k = 0xffffffff;
 296                 }
 297         }
 298
 299 #ifdef CONFIG_EFI
 300         /* Setup EFI state */
 301         setup_efi_state(params, params_load_addr, efi_map_offset, efi_map_sz,
 302                         setup_data_offset);
 303         setup_data_offset += sizeof(struct setup_data) +
 304                         sizeof(struct efi_setup_data);
 305 #endif
 306
 307         if (IS_ENABLED(CONFIG_IMA_KEXEC)) {
 308                 /* Setup IMA log buffer state */
 309                 setup_ima_state(image, params, params_load_addr,
 310                                 setup_data_offset);
 311                 setup_data_offset += sizeof(struct setup_data) +
 312                                      sizeof(struct ima_setup_data);
 313         }
 314
 315         /* Setup RNG seed */
 316         setup_rng_seed(params, params_load_addr, setup_data_offset);
 317
 318         /* Setup EDD info */
 319         memcpy(params->eddbuf, boot_params.eddbuf,
 320                                 EDDMAXNR * sizeof(struct edd_info));
 321         params->eddbuf_entries = boot_params.eddbuf_entries;
 322
 323         memcpy(params->edd_mbr_sig_buffer, boot_params.edd_mbr_sig_buffer,
 324                EDD_MBR_SIG_MAX * sizeof(unsigned int));
 325
 326         return ret;
 327 }
 328
 329 static int bzImage64_probe(const char *buf, unsigned long len)
 330 {
 331         int ret = -ENOEXEC;
 332         struct setup_header *header;
 333
 334         /* kernel should be at least two sectors long */
 335         if (len < 2 * 512) {
 336                 pr_err("File is too short to be a bzImage\n");
 337                 return ret;
 338         }
 339
 340         header = (struct setup_header *)(buf + offsetof(struct boot_params, hdr));
 341         if (memcmp((char *)&header->header, "HdrS", 4) != 0) {
 342                 pr_err("Not a bzImage\n");
 343                 return ret;
 344         }
 345
 346         if (header->boot_flag != 0xAA55) {
 347                 pr_err("No x86 boot sector present\n");
 348                 return ret;
 349         }
 350
 351         if (header->version < 0x020C) {
 352                 pr_err("Must be at least protocol version 2.12\n");
 353                 return ret;
 354         }
 355
 356         if (!(header->loadflags & LOADED_HIGH)) {
 357                 pr_err("zImage not a bzImage\n");
 358                 return ret;
 359         }
 360
 361         if (!(header->xloadflags & XLF_KERNEL_64)) {
 362                 pr_err("Not a bzImage64. XLF_KERNEL_64 is not set.\n");
 363                 return ret;
 364         }
 365
 366         if (!(header->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)) {
 367                 pr_err("XLF_CAN_BE_LOADED_ABOVE_4G is not set.\n");
 368                 return ret;
 369         }
 370
 371         /*
 372          * Can't handle 32bit EFI as it does not allow loading kernel
 373          * above 4G. This should be handled by 32bit bzImage loader
 374          */
 375         if (efi_enabled(EFI_RUNTIME_SERVICES) && !efi_enabled(EFI_64BIT)) {
 376                 pr_debug("EFI is 32 bit. Can't load kernel above 4G.\n");
 377                 return ret;
 378         }
 379
 380         if (!(header->xloadflags & XLF_5LEVEL) && pgtable_l5_enabled()) {
 381                 pr_err("bzImage cannot handle 5-level paging mode.\n");
 382                 return ret;
 383         }
 384
 385         /* I've got a bzImage */
 386         pr_debug("It's a relocatable bzImage64\n");
 387         ret = 0;
 388
 389         return ret;
 390 }
 391
 392 static void *bzImage64_load(struct kimage *image, char *kernel,
 393                             unsigned long kernel_len, char *initrd,
 394                             unsigned long initrd_len, char *cmdline,
 395                             unsigned long cmdline_len)
 396 {
 397
 398         struct setup_header *header;
 399         int setup_sects, kern16_size, ret = 0;
 400         unsigned long setup_header_size, params_cmdline_sz;
 401         struct boot_params *params;
 402         unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr;
 403         struct bzimage64_data *ldata;
 404         struct kexec_entry64_regs regs64;
 405         void *stack;
 406         unsigned int setup_hdr_offset = offsetof(struct boot_params, hdr);
 407         unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset;
 408         struct kexec_buf kbuf = { .image = image, .buf_max = ULONG_MAX,
 409                                   .top_down = true };
 410         struct kexec_buf pbuf = { .image = image, .buf_min = MIN_PURGATORY_ADDR,
 411                                   .buf_max = ULONG_MAX, .top_down = true };
 412
 413         header = (struct setup_header *)(kernel + setup_hdr_offset);
 414         setup_sects = header->setup_sects;
 415         if (setup_sects == 0)
 416                 setup_sects = 4;
 417
 418         kern16_size = (setup_sects + 1) * 512;
 419         if (kernel_len < kern16_size) {
 420                 pr_err("bzImage truncated\n");
 421                 return ERR_PTR(-ENOEXEC);
 422         }
 423
 424         if (cmdline_len > header->cmdline_size) {
 425                 pr_err("Kernel command line too long\n");
 426                 return ERR_PTR(-EINVAL);
 427         }
 428
 429         /*
 430          * In case of crash dump, we will append elfcorehdr=<addr> to
 431          * command line. Make sure it does not overflow
 432          */
 433         if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) {
 434                 pr_err("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
 435                 return ERR_PTR(-EINVAL);
 436         }
 437
 438 #ifdef CONFIG_CRASH_DUMP
 439         /* Allocate and load backup region */
 440         if (image->type == KEXEC_TYPE_CRASH) {
 441                 ret = crash_load_segments(image);
 442                 if (ret)
 443                         return ERR_PTR(ret);
 444         }
 445 #endif
 446
 447         /*
 448          * Load purgatory. For 64bit entry point, purgatory  code can be
 449          * anywhere.
 450          */
 451         ret = kexec_load_purgatory(image, &pbuf);
 452         if (ret) {
 453                 pr_err("Loading purgatory failed\n");
 454                 return ERR_PTR(ret);
 455         }
 456
 457         kexec_dprintk("Loaded purgatory at 0x%lx\n", pbuf.mem);
 458
 459
 460         /*
 461          * Load Bootparams and cmdline and space for efi stuff.
 462          *
 463          * Allocate memory together for multiple data structures so
 464          * that they all can go in single area/segment and we don't
 465          * have to create separate segment for each. Keeps things
 466          * little bit simple
 467          */
 468         efi_map_sz = efi_get_runtime_map_size();
 469         params_cmdline_sz = sizeof(struct boot_params) + cmdline_len +
 470                                 MAX_ELFCOREHDR_STR_LEN;
 471         params_cmdline_sz = ALIGN(params_cmdline_sz, 16);
 472         kbuf.bufsz = params_cmdline_sz + ALIGN(efi_map_sz, 16) +
 473                                 sizeof(struct setup_data) +
 474                                 sizeof(struct efi_setup_data) +
 475                                 sizeof(struct setup_data) +
 476                                 RNG_SEED_LENGTH;
 477
 478         if (IS_ENABLED(CONFIG_IMA_KEXEC))
 479                 kbuf.bufsz += sizeof(struct setup_data) +
 480                               sizeof(struct ima_setup_data);
 481
 482         params = kzalloc(kbuf.bufsz, GFP_KERNEL);
 483         if (!params)
 484                 return ERR_PTR(-ENOMEM);
 485         efi_map_offset = params_cmdline_sz;
 486         efi_setup_data_offset = efi_map_offset + ALIGN(efi_map_sz, 16);
 487
 488         /* Copy setup header onto bootparams. Documentation/arch/x86/boot.rst */
 489         setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset;
 490
 491         /* Is there a limit on setup header size? */
 492         memcpy(&params->hdr, (kernel + setup_hdr_offset), setup_header_size);
 493
 494         kbuf.buffer = params;
 495         kbuf.memsz = kbuf.bufsz;
 496         kbuf.buf_align = 16;
 497         kbuf.buf_min = MIN_BOOTPARAM_ADDR;
 498         ret = kexec_add_buffer(&kbuf);
 499         if (ret)
 500                 goto out_free_params;
 501         bootparam_load_addr = kbuf.mem;
 502         kexec_dprintk("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 503                       bootparam_load_addr, kbuf.bufsz, kbuf.memsz);
 504
 505         /* Load kernel */
 506         kbuf.buffer = kernel + kern16_size;
 507         kbuf.bufsz =  kernel_len - kern16_size;
 508         kbuf.memsz = PAGE_ALIGN(header->init_size);
 509         kbuf.buf_align = header->kernel_alignment;
 510         if (header->pref_address < MIN_KERNEL_LOAD_ADDR)
 511                 kbuf.buf_min = MIN_KERNEL_LOAD_ADDR;
 512         else
 513                 kbuf.buf_min = header->pref_address;
 514         kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
 515         ret = kexec_add_buffer(&kbuf);
 516         if (ret)
 517                 goto out_free_params;
 518         kernel_load_addr = kbuf.mem;
 519
 520         kexec_dprintk("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 521                       kernel_load_addr, kbuf.bufsz, kbuf.memsz);
 522
 523         /* Load initrd high */
 524         if (initrd) {
 525                 kbuf.buffer = initrd;
 526                 kbuf.bufsz = kbuf.memsz = initrd_len;
 527                 kbuf.buf_align = PAGE_SIZE;
 528                 kbuf.buf_min = MIN_INITRD_LOAD_ADDR;
 529                 kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
 530                 ret = kexec_add_buffer(&kbuf);
 531                 if (ret)
 532                         goto out_free_params;
 533                 initrd_load_addr = kbuf.mem;
 534
 535                 kexec_dprintk("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 536                               initrd_load_addr, initrd_len, initrd_len);
 537
 538                 setup_initrd(params, initrd_load_addr, initrd_len);
 539         }
 540
 541         setup_cmdline(image, params, bootparam_load_addr,
 542                       sizeof(struct boot_params), cmdline, cmdline_len);
 543
 544         /* bootloader info. Do we need a separate ID for kexec kernel loader? */
 545         params->hdr.type_of_loader = 0x0D << 4;
 546         params->hdr.loadflags = 0;
 547
 548         /* Setup purgatory regs for entry */
 549         ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
 550                                              sizeof(regs64), 1);
 551         if (ret)
 552                 goto out_free_params;
 553
 554         regs64.rbx = 0; /* Bootstrap Processor */
 555         regs64.rsi = bootparam_load_addr;
 556         regs64.rip = kernel_load_addr + 0x200;
 557         stack = kexec_purgatory_get_symbol_addr(image, "stack_end");
 558         if (IS_ERR(stack)) {
 559                 pr_err("Could not find address of symbol stack_end\n");
 560                 ret = -EINVAL;
 561                 goto out_free_params;
 562         }
 563
 564         regs64.rsp = (unsigned long)stack;
 565         ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
 566                                              sizeof(regs64), 0);
 567         if (ret)
 568                 goto out_free_params;
 569
 570         ret = setup_boot_parameters(image, params, bootparam_load_addr,
 571                                     efi_map_offset, efi_map_sz,
 572                                     efi_setup_data_offset);
 573         if (ret)
 574                 goto out_free_params;
 575
 576         /* Allocate loader specific data */
 577         ldata = kzalloc(sizeof(struct bzimage64_data), GFP_KERNEL);
 578         if (!ldata) {
 579                 ret = -ENOMEM;
 580                 goto out_free_params;
 581         }
 582
 583         /*
 584          * Store pointer to params so that it could be freed after loading
 585          * params segment has been loaded and contents have been copied
 586          * somewhere else.
 587          */
 588         ldata->bootparams_buf = params;
 589         return ldata;
 590
 591 out_free_params:
 592         kfree(params);
 593         return ERR_PTR(ret);
 594 }
 595
 596 /* This cleanup function is called after various segments have been loaded */
 597 static int bzImage64_cleanup(void *loader_data)
 598 {
 599         struct bzimage64_data *ldata = loader_data;
 600
 601         if (!ldata)
 602                 return 0;
 603
 604         kfree(ldata->bootparams_buf);
 605         ldata->bootparams_buf = NULL;
 606
 607         return 0;
 608 }
 609
 610 const struct kexec_file_ops kexec_bzImage64_ops = {
 611         .probe = bzImage64_probe,
 612         .load = bzImage64_load,
 613         .cleanup = bzImage64_cleanup,
 614 #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG
 615         .verify_sig = kexec_kernel_verify_pe_sig,
 616 #endif
 617 };