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         if (image->type == KEXEC_TYPE_CRASH) {
 267                 ret = crash_setup_memmap_entries(image, params);
 268                 if (ret)
 269                         return ret;
 270         } else
 271                 setup_e820_entries(params);
 272
 273         nr_e820_entries = params->e820_entries;
 274
 275         kexec_dprintk("E820 memmap:\n");
 276         for (i = 0; i < nr_e820_entries; i++) {
 277                 kexec_dprintk("%016llx-%016llx (%d)\n",
 278                               params->e820_table[i].addr,
 279                               params->e820_table[i].addr + params->e820_table[i].size - 1,
 280                               params->e820_table[i].type);
 281                 if (params->e820_table[i].type != E820_TYPE_RAM)
 282                         continue;
 283                 start = params->e820_table[i].addr;
 284                 end = params->e820_table[i].addr + params->e820_table[i].size - 1;
 285
 286                 if ((start <= 0x100000) && end > 0x100000) {
 287                         mem_k = (end >> 10) - (0x100000 >> 10);
 288                         params->screen_info.ext_mem_k = mem_k;
 289                         params->alt_mem_k = mem_k;
 290                         if (mem_k > 0xfc00)
 291                                 params->screen_info.ext_mem_k = 0xfc00; /* 64M*/
 292                         if (mem_k > 0xffffffff)
 293                                 params->alt_mem_k = 0xffffffff;
 294                 }
 295         }
 296
 297 #ifdef CONFIG_EFI
 298         /* Setup EFI state */
 299         setup_efi_state(params, params_load_addr, efi_map_offset, efi_map_sz,
 300                         setup_data_offset);
 301         setup_data_offset += sizeof(struct setup_data) +
 302                         sizeof(struct efi_setup_data);
 303 #endif
 304
 305         if (IS_ENABLED(CONFIG_IMA_KEXEC)) {
 306                 /* Setup IMA log buffer state */
 307                 setup_ima_state(image, params, params_load_addr,
 308                                 setup_data_offset);
 309                 setup_data_offset += sizeof(struct setup_data) +
 310                                      sizeof(struct ima_setup_data);
 311         }
 312
 313         /* Setup RNG seed */
 314         setup_rng_seed(params, params_load_addr, setup_data_offset);
 315
 316         /* Setup EDD info */
 317         memcpy(params->eddbuf, boot_params.eddbuf,
 318                                 EDDMAXNR * sizeof(struct edd_info));
 319         params->eddbuf_entries = boot_params.eddbuf_entries;
 320
 321         memcpy(params->edd_mbr_sig_buffer, boot_params.edd_mbr_sig_buffer,
 322                EDD_MBR_SIG_MAX * sizeof(unsigned int));
 323
 324         return ret;
 325 }
 326
 327 static int bzImage64_probe(const char *buf, unsigned long len)
 328 {
 329         int ret = -ENOEXEC;
 330         struct setup_header *header;
 331
 332         /* kernel should be at least two sectors long */
 333         if (len < 2 * 512) {
 334                 pr_err("File is too short to be a bzImage\n");
 335                 return ret;
 336         }
 337
 338         header = (struct setup_header *)(buf + offsetof(struct boot_params, hdr));
 339         if (memcmp((char *)&header->header, "HdrS", 4) != 0) {
 340                 pr_err("Not a bzImage\n");
 341                 return ret;
 342         }
 343
 344         if (header->boot_flag != 0xAA55) {
 345                 pr_err("No x86 boot sector present\n");
 346                 return ret;
 347         }
 348
 349         if (header->version < 0x020C) {
 350                 pr_err("Must be at least protocol version 2.12\n");
 351                 return ret;
 352         }
 353
 354         if (!(header->loadflags & LOADED_HIGH)) {
 355                 pr_err("zImage not a bzImage\n");
 356                 return ret;
 357         }
 358
 359         if (!(header->xloadflags & XLF_KERNEL_64)) {
 360                 pr_err("Not a bzImage64. XLF_KERNEL_64 is not set.\n");
 361                 return ret;
 362         }
 363
 364         if (!(header->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)) {
 365                 pr_err("XLF_CAN_BE_LOADED_ABOVE_4G is not set.\n");
 366                 return ret;
 367         }
 368
 369         /*
 370          * Can't handle 32bit EFI as it does not allow loading kernel
 371          * above 4G. This should be handled by 32bit bzImage loader
 372          */
 373         if (efi_enabled(EFI_RUNTIME_SERVICES) && !efi_enabled(EFI_64BIT)) {
 374                 pr_debug("EFI is 32 bit. Can't load kernel above 4G.\n");
 375                 return ret;
 376         }
 377
 378         if (!(header->xloadflags & XLF_5LEVEL) && pgtable_l5_enabled()) {
 379                 pr_err("bzImage cannot handle 5-level paging mode.\n");
 380                 return ret;
 381         }
 382
 383         /* I've got a bzImage */
 384         pr_debug("It's a relocatable bzImage64\n");
 385         ret = 0;
 386
 387         return ret;
 388 }
 389
 390 static void *bzImage64_load(struct kimage *image, char *kernel,
 391                             unsigned long kernel_len, char *initrd,
 392                             unsigned long initrd_len, char *cmdline,
 393                             unsigned long cmdline_len)
 394 {
 395
 396         struct setup_header *header;
 397         int setup_sects, kern16_size, ret = 0;
 398         unsigned long setup_header_size, params_cmdline_sz;
 399         struct boot_params *params;
 400         unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr;
 401         struct bzimage64_data *ldata;
 402         struct kexec_entry64_regs regs64;
 403         void *stack;
 404         unsigned int setup_hdr_offset = offsetof(struct boot_params, hdr);
 405         unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset;
 406         struct kexec_buf kbuf = { .image = image, .buf_max = ULONG_MAX,
 407                                   .top_down = true };
 408         struct kexec_buf pbuf = { .image = image, .buf_min = MIN_PURGATORY_ADDR,
 409                                   .buf_max = ULONG_MAX, .top_down = true };
 410
 411         header = (struct setup_header *)(kernel + setup_hdr_offset);
 412         setup_sects = header->setup_sects;
 413         if (setup_sects == 0)
 414                 setup_sects = 4;
 415
 416         kern16_size = (setup_sects + 1) * 512;
 417         if (kernel_len < kern16_size) {
 418                 pr_err("bzImage truncated\n");
 419                 return ERR_PTR(-ENOEXEC);
 420         }
 421
 422         if (cmdline_len > header->cmdline_size) {
 423                 pr_err("Kernel command line too long\n");
 424                 return ERR_PTR(-EINVAL);
 425         }
 426
 427         /*
 428          * In case of crash dump, we will append elfcorehdr=<addr> to
 429          * command line. Make sure it does not overflow
 430          */
 431         if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) {
 432                 pr_err("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
 433                 return ERR_PTR(-EINVAL);
 434         }
 435
 436         /* Allocate and load backup region */
 437         if (image->type == KEXEC_TYPE_CRASH) {
 438                 ret = crash_load_segments(image);
 439                 if (ret)
 440                         return ERR_PTR(ret);
 441         }
 442
 443         /*
 444          * Load purgatory. For 64bit entry point, purgatory  code can be
 445          * anywhere.
 446          */
 447         ret = kexec_load_purgatory(image, &pbuf);
 448         if (ret) {
 449                 pr_err("Loading purgatory failed\n");
 450                 return ERR_PTR(ret);
 451         }
 452
 453         kexec_dprintk("Loaded purgatory at 0x%lx\n", pbuf.mem);
 454
 455
 456         /*
 457          * Load Bootparams and cmdline and space for efi stuff.
 458          *
 459          * Allocate memory together for multiple data structures so
 460          * that they all can go in single area/segment and we don't
 461          * have to create separate segment for each. Keeps things
 462          * little bit simple
 463          */
 464         efi_map_sz = efi_get_runtime_map_size();
 465         params_cmdline_sz = sizeof(struct boot_params) + cmdline_len +
 466                                 MAX_ELFCOREHDR_STR_LEN;
 467         params_cmdline_sz = ALIGN(params_cmdline_sz, 16);
 468         kbuf.bufsz = params_cmdline_sz + ALIGN(efi_map_sz, 16) +
 469                                 sizeof(struct setup_data) +
 470                                 sizeof(struct efi_setup_data) +
 471                                 sizeof(struct setup_data) +
 472                                 RNG_SEED_LENGTH;
 473
 474         if (IS_ENABLED(CONFIG_IMA_KEXEC))
 475                 kbuf.bufsz += sizeof(struct setup_data) +
 476                               sizeof(struct ima_setup_data);
 477
 478         params = kzalloc(kbuf.bufsz, GFP_KERNEL);
 479         if (!params)
 480                 return ERR_PTR(-ENOMEM);
 481         efi_map_offset = params_cmdline_sz;
 482         efi_setup_data_offset = efi_map_offset + ALIGN(efi_map_sz, 16);
 483
 484         /* Copy setup header onto bootparams. Documentation/arch/x86/boot.rst */
 485         setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset;
 486
 487         /* Is there a limit on setup header size? */
 488         memcpy(&params->hdr, (kernel + setup_hdr_offset), setup_header_size);
 489
 490         kbuf.buffer = params;
 491         kbuf.memsz = kbuf.bufsz;
 492         kbuf.buf_align = 16;
 493         kbuf.buf_min = MIN_BOOTPARAM_ADDR;
 494         ret = kexec_add_buffer(&kbuf);
 495         if (ret)
 496                 goto out_free_params;
 497         bootparam_load_addr = kbuf.mem;
 498         kexec_dprintk("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 499                       bootparam_load_addr, kbuf.bufsz, kbuf.memsz);
 500
 501         /* Load kernel */
 502         kbuf.buffer = kernel + kern16_size;
 503         kbuf.bufsz =  kernel_len - kern16_size;
 504         kbuf.memsz = PAGE_ALIGN(header->init_size);
 505         kbuf.buf_align = header->kernel_alignment;
 506         kbuf.buf_min = MIN_KERNEL_LOAD_ADDR;
 507         kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
 508         ret = kexec_add_buffer(&kbuf);
 509         if (ret)
 510                 goto out_free_params;
 511         kernel_load_addr = kbuf.mem;
 512
 513         kexec_dprintk("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 514                       kernel_load_addr, kbuf.bufsz, kbuf.memsz);
 515
 516         /* Load initrd high */
 517         if (initrd) {
 518                 kbuf.buffer = initrd;
 519                 kbuf.bufsz = kbuf.memsz = initrd_len;
 520                 kbuf.buf_align = PAGE_SIZE;
 521                 kbuf.buf_min = MIN_INITRD_LOAD_ADDR;
 522                 kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
 523                 ret = kexec_add_buffer(&kbuf);
 524                 if (ret)
 525                         goto out_free_params;
 526                 initrd_load_addr = kbuf.mem;
 527
 528                 kexec_dprintk("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
 529                               initrd_load_addr, initrd_len, initrd_len);
 530
 531                 setup_initrd(params, initrd_load_addr, initrd_len);
 532         }
 533
 534         setup_cmdline(image, params, bootparam_load_addr,
 535                       sizeof(struct boot_params), cmdline, cmdline_len);
 536
 537         /* bootloader info. Do we need a separate ID for kexec kernel loader? */
 538         params->hdr.type_of_loader = 0x0D << 4;
 539         params->hdr.loadflags = 0;
 540
 541         /* Setup purgatory regs for entry */
 542         ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
 543                                              sizeof(regs64), 1);
 544         if (ret)
 545                 goto out_free_params;
 546
 547         regs64.rbx = 0; /* Bootstrap Processor */
 548         regs64.rsi = bootparam_load_addr;
 549         regs64.rip = kernel_load_addr + 0x200;
 550         stack = kexec_purgatory_get_symbol_addr(image, "stack_end");
 551         if (IS_ERR(stack)) {
 552                 pr_err("Could not find address of symbol stack_end\n");
 553                 ret = -EINVAL;
 554                 goto out_free_params;
 555         }
 556
 557         regs64.rsp = (unsigned long)stack;
 558         ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
 559                                              sizeof(regs64), 0);
 560         if (ret)
 561                 goto out_free_params;
 562
 563         ret = setup_boot_parameters(image, params, bootparam_load_addr,
 564                                     efi_map_offset, efi_map_sz,
 565                                     efi_setup_data_offset);
 566         if (ret)
 567                 goto out_free_params;
 568
 569         /* Allocate loader specific data */
 570         ldata = kzalloc(sizeof(struct bzimage64_data), GFP_KERNEL);
 571         if (!ldata) {
 572                 ret = -ENOMEM;
 573                 goto out_free_params;
 574         }
 575
 576         /*
 577          * Store pointer to params so that it could be freed after loading
 578          * params segment has been loaded and contents have been copied
 579          * somewhere else.
 580          */
 581         ldata->bootparams_buf = params;
 582         return ldata;
 583
 584 out_free_params:
 585         kfree(params);
 586         return ERR_PTR(ret);
 587 }
 588
 589 /* This cleanup function is called after various segments have been loaded */
 590 static int bzImage64_cleanup(void *loader_data)
 591 {
 592         struct bzimage64_data *ldata = loader_data;
 593
 594         if (!ldata)
 595                 return 0;
 596
 597         kfree(ldata->bootparams_buf);
 598         ldata->bootparams_buf = NULL;
 599
 600         return 0;
 601 }
 602
 603 const struct kexec_file_ops kexec_bzImage64_ops = {
 604         .probe = bzImage64_probe,
 605         .load = bzImage64_load,
 606         .cleanup = bzImage64_cleanup,
 607 #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG
 608         .verify_sig = kexec_kernel_verify_pe_sig,
 609 #endif
 610 };