14febfb8dSArd Biesheuvel // SPDX-License-Identifier: GPL-2.0 2f4f75ad5SArd Biesheuvel /* 3f4f75ad5SArd Biesheuvel * Helper functions used by the EFI stub on multiple 4f4f75ad5SArd Biesheuvel * architectures. This should be #included by the EFI stub 5f4f75ad5SArd Biesheuvel * implementation files. 6f4f75ad5SArd Biesheuvel * 7f4f75ad5SArd Biesheuvel * Copyright 2011 Intel Corporation; author Matt Fleming 8f4f75ad5SArd Biesheuvel */ 9f4f75ad5SArd Biesheuvel 10f4f75ad5SArd Biesheuvel #include <linux/efi.h> 11f4f75ad5SArd Biesheuvel #include <asm/efi.h> 12f4f75ad5SArd Biesheuvel 13f4f75ad5SArd Biesheuvel #include "efistub.h" 14f4f75ad5SArd Biesheuvel 15980771f6SArd Biesheuvel bool efi_nochunk; 16980771f6SArd Biesheuvel bool efi_nokaslr; 17980771f6SArd Biesheuvel bool efi_noinitrd; 18980771f6SArd Biesheuvel bool efi_quiet; 19980771f6SArd Biesheuvel bool efi_novamap; 20980771f6SArd Biesheuvel 2154439370SArvind Sankar static bool efi_nosoftreserve; 2254439370SArvind Sankar static bool efi_disable_pci_dma = IS_ENABLED(CONFIG_EFI_DISABLE_PCI_DMA); 2360f38de7SArd Biesheuvel 24b617c526SDan Williams bool __pure __efi_soft_reserve_enabled(void) 25b617c526SDan Williams { 26b617c526SDan Williams return !efi_nosoftreserve; 27b617c526SDan Williams } 2860f38de7SArd Biesheuvel 29cb8c90a0SArvind Sankar void efi_char16_puts(efi_char16_t *str) 30cb8c90a0SArvind Sankar { 31cb8c90a0SArvind Sankar efi_call_proto(efi_table_attr(efi_system_table, con_out), 32cb8c90a0SArvind Sankar output_string, str); 33cb8c90a0SArvind Sankar } 34cb8c90a0SArvind Sankar 35cb8c90a0SArvind Sankar void efi_puts(const char *str) 36f4f75ad5SArd Biesheuvel { 370b8d9fc9SArd Biesheuvel while (*str) { 380b8d9fc9SArd Biesheuvel efi_char16_t ch[] = { *str++, L'\0' }; 39f4f75ad5SArd Biesheuvel 400b8d9fc9SArd Biesheuvel if (ch[0] == L'\n') 41cb8c90a0SArvind Sankar efi_char16_puts(L"\r\n"); 420b8d9fc9SArd Biesheuvel else 43cb8c90a0SArvind Sankar efi_char16_puts(ch); 44f4f75ad5SArd Biesheuvel } 45f4f75ad5SArd Biesheuvel } 46f4f75ad5SArd Biesheuvel 475a17dae4SMatt Fleming /* 485a17dae4SMatt Fleming * Parse the ASCII string 'cmdline' for EFI options, denoted by the efi= 495a17dae4SMatt Fleming * option, e.g. efi=nochunk. 505a17dae4SMatt Fleming * 515a17dae4SMatt Fleming * It should be noted that efi= is parsed in two very different 525a17dae4SMatt Fleming * environments, first in the early boot environment of the EFI boot 535a17dae4SMatt Fleming * stub, and subsequently during the kernel boot. 545a17dae4SMatt Fleming */ 5560f38de7SArd Biesheuvel efi_status_t efi_parse_options(char const *cmdline) 565a17dae4SMatt Fleming { 5791d150c0SArd Biesheuvel size_t len = strlen(cmdline) + 1; 5891d150c0SArd Biesheuvel efi_status_t status; 5991d150c0SArd Biesheuvel char *str, *buf; 605a17dae4SMatt Fleming 6191d150c0SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, len, (void **)&buf); 6291d150c0SArd Biesheuvel if (status != EFI_SUCCESS) 6391d150c0SArd Biesheuvel return status; 6491d150c0SArd Biesheuvel 6591d150c0SArd Biesheuvel str = skip_spaces(memcpy(buf, cmdline, len)); 6691d150c0SArd Biesheuvel 6791d150c0SArd Biesheuvel while (*str) { 6891d150c0SArd Biesheuvel char *param, *val; 6991d150c0SArd Biesheuvel 7091d150c0SArd Biesheuvel str = next_arg(str, ¶m, &val); 7191d150c0SArd Biesheuvel 7291d150c0SArd Biesheuvel if (!strcmp(param, "nokaslr")) { 737d4e323dSArd Biesheuvel efi_nokaslr = true; 7491d150c0SArd Biesheuvel } else if (!strcmp(param, "quiet")) { 757d4e323dSArd Biesheuvel efi_quiet = true; 7679d3219dSArd Biesheuvel } else if (!strcmp(param, "noinitrd")) { 7779d3219dSArd Biesheuvel efi_noinitrd = true; 7891d150c0SArd Biesheuvel } else if (!strcmp(param, "efi") && val) { 7991d150c0SArd Biesheuvel efi_nochunk = parse_option_str(val, "nochunk"); 8091d150c0SArd Biesheuvel efi_novamap = parse_option_str(val, "novamap"); 81eeff7d63SArd Biesheuvel 8291d150c0SArd Biesheuvel efi_nosoftreserve = IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) && 8391d150c0SArd Biesheuvel parse_option_str(val, "nosoftreserve"); 845a17dae4SMatt Fleming 8591d150c0SArd Biesheuvel if (parse_option_str(val, "disable_early_pci_dma")) 864444f854SMatthew Garrett efi_disable_pci_dma = true; 8791d150c0SArd Biesheuvel if (parse_option_str(val, "no_disable_early_pci_dma")) 884444f854SMatthew Garrett efi_disable_pci_dma = false; 89fffb6804SArvind Sankar } else if (!strcmp(param, "video") && 90fffb6804SArvind Sankar val && strstarts(val, "efifb:")) { 91fffb6804SArvind Sankar efi_parse_option_graphics(val + strlen("efifb:")); 924444f854SMatthew Garrett } 935a17dae4SMatt Fleming } 9491d150c0SArd Biesheuvel efi_bs_call(free_pool, buf); 955a17dae4SMatt Fleming return EFI_SUCCESS; 965a17dae4SMatt Fleming } 97f4f75ad5SArd Biesheuvel 98f4f75ad5SArd Biesheuvel /* 99f4f75ad5SArd Biesheuvel * Get the number of UTF-8 bytes corresponding to an UTF-16 character. 100f4f75ad5SArd Biesheuvel * This overestimates for surrogates, but that is okay. 101f4f75ad5SArd Biesheuvel */ 102f4f75ad5SArd Biesheuvel static int efi_utf8_bytes(u16 c) 103f4f75ad5SArd Biesheuvel { 104f4f75ad5SArd Biesheuvel return 1 + (c >= 0x80) + (c >= 0x800); 105f4f75ad5SArd Biesheuvel } 106f4f75ad5SArd Biesheuvel 107f4f75ad5SArd Biesheuvel /* 108f4f75ad5SArd Biesheuvel * Convert an UTF-16 string, not necessarily null terminated, to UTF-8. 109f4f75ad5SArd Biesheuvel */ 110f4f75ad5SArd Biesheuvel static u8 *efi_utf16_to_utf8(u8 *dst, const u16 *src, int n) 111f4f75ad5SArd Biesheuvel { 112f4f75ad5SArd Biesheuvel unsigned int c; 113f4f75ad5SArd Biesheuvel 114f4f75ad5SArd Biesheuvel while (n--) { 115f4f75ad5SArd Biesheuvel c = *src++; 116f4f75ad5SArd Biesheuvel if (n && c >= 0xd800 && c <= 0xdbff && 117f4f75ad5SArd Biesheuvel *src >= 0xdc00 && *src <= 0xdfff) { 118f4f75ad5SArd Biesheuvel c = 0x10000 + ((c & 0x3ff) << 10) + (*src & 0x3ff); 119f4f75ad5SArd Biesheuvel src++; 120f4f75ad5SArd Biesheuvel n--; 121f4f75ad5SArd Biesheuvel } 122f4f75ad5SArd Biesheuvel if (c >= 0xd800 && c <= 0xdfff) 123f4f75ad5SArd Biesheuvel c = 0xfffd; /* Unmatched surrogate */ 124f4f75ad5SArd Biesheuvel if (c < 0x80) { 125f4f75ad5SArd Biesheuvel *dst++ = c; 126f4f75ad5SArd Biesheuvel continue; 127f4f75ad5SArd Biesheuvel } 128f4f75ad5SArd Biesheuvel if (c < 0x800) { 129f4f75ad5SArd Biesheuvel *dst++ = 0xc0 + (c >> 6); 130f4f75ad5SArd Biesheuvel goto t1; 131f4f75ad5SArd Biesheuvel } 132f4f75ad5SArd Biesheuvel if (c < 0x10000) { 133f4f75ad5SArd Biesheuvel *dst++ = 0xe0 + (c >> 12); 134f4f75ad5SArd Biesheuvel goto t2; 135f4f75ad5SArd Biesheuvel } 136f4f75ad5SArd Biesheuvel *dst++ = 0xf0 + (c >> 18); 137f4f75ad5SArd Biesheuvel *dst++ = 0x80 + ((c >> 12) & 0x3f); 138f4f75ad5SArd Biesheuvel t2: 139f4f75ad5SArd Biesheuvel *dst++ = 0x80 + ((c >> 6) & 0x3f); 140f4f75ad5SArd Biesheuvel t1: 141f4f75ad5SArd Biesheuvel *dst++ = 0x80 + (c & 0x3f); 142f4f75ad5SArd Biesheuvel } 143f4f75ad5SArd Biesheuvel 144f4f75ad5SArd Biesheuvel return dst; 145f4f75ad5SArd Biesheuvel } 146f4f75ad5SArd Biesheuvel 147f4f75ad5SArd Biesheuvel /* 148f4f75ad5SArd Biesheuvel * Convert the unicode UEFI command line to ASCII to pass to kernel. 149f4f75ad5SArd Biesheuvel * Size of memory allocated return in *cmd_line_len. 150f4f75ad5SArd Biesheuvel * Returns NULL on error. 151f4f75ad5SArd Biesheuvel */ 152cd33a5c1SArd Biesheuvel char *efi_convert_cmdline(efi_loaded_image_t *image, 1531e45bf73SArd Biesheuvel int *cmd_line_len, unsigned long max_addr) 154f4f75ad5SArd Biesheuvel { 155f4f75ad5SArd Biesheuvel const u16 *s2; 156f4f75ad5SArd Biesheuvel u8 *s1 = NULL; 157f4f75ad5SArd Biesheuvel unsigned long cmdline_addr = 0; 158f7b85b33SArd Biesheuvel int load_options_chars = efi_table_attr(image, load_options_size) / 2; 159f7b85b33SArd Biesheuvel const u16 *options = efi_table_attr(image, load_options); 160f4f75ad5SArd Biesheuvel int options_bytes = 0; /* UTF-8 bytes */ 161f4f75ad5SArd Biesheuvel int options_chars = 0; /* UTF-16 chars */ 162f4f75ad5SArd Biesheuvel efi_status_t status; 163f4f75ad5SArd Biesheuvel u16 zero = 0; 164f4f75ad5SArd Biesheuvel 165f4f75ad5SArd Biesheuvel if (options) { 166f4f75ad5SArd Biesheuvel s2 = options; 167f4f75ad5SArd Biesheuvel while (*s2 && *s2 != '\n' 168f4f75ad5SArd Biesheuvel && options_chars < load_options_chars) { 169f4f75ad5SArd Biesheuvel options_bytes += efi_utf8_bytes(*s2++); 170f4f75ad5SArd Biesheuvel options_chars++; 171f4f75ad5SArd Biesheuvel } 172f4f75ad5SArd Biesheuvel } 173f4f75ad5SArd Biesheuvel 174f4f75ad5SArd Biesheuvel if (!options_chars) { 175f4f75ad5SArd Biesheuvel /* No command line options, so return empty string*/ 176f4f75ad5SArd Biesheuvel options = &zero; 177f4f75ad5SArd Biesheuvel } 178f4f75ad5SArd Biesheuvel 179f4f75ad5SArd Biesheuvel options_bytes++; /* NUL termination */ 180f4f75ad5SArd Biesheuvel 1811e45bf73SArd Biesheuvel status = efi_allocate_pages(options_bytes, &cmdline_addr, max_addr); 182f4f75ad5SArd Biesheuvel if (status != EFI_SUCCESS) 183f4f75ad5SArd Biesheuvel return NULL; 184f4f75ad5SArd Biesheuvel 185f4f75ad5SArd Biesheuvel s1 = (u8 *)cmdline_addr; 186f4f75ad5SArd Biesheuvel s2 = (const u16 *)options; 187f4f75ad5SArd Biesheuvel 188f4f75ad5SArd Biesheuvel s1 = efi_utf16_to_utf8(s1, s2, options_chars); 189f4f75ad5SArd Biesheuvel *s1 = '\0'; 190f4f75ad5SArd Biesheuvel 191f4f75ad5SArd Biesheuvel *cmd_line_len = options_bytes; 192f4f75ad5SArd Biesheuvel return (char *)cmdline_addr; 193f4f75ad5SArd Biesheuvel } 194fc07716bSJeffrey Hugo 195fc07716bSJeffrey Hugo /* 196fc07716bSJeffrey Hugo * Handle calling ExitBootServices according to the requirements set out by the 197fc07716bSJeffrey Hugo * spec. Obtains the current memory map, and returns that info after calling 198fc07716bSJeffrey Hugo * ExitBootServices. The client must specify a function to perform any 199fc07716bSJeffrey Hugo * processing of the memory map data prior to ExitBootServices. A client 200fc07716bSJeffrey Hugo * specific structure may be passed to the function via priv. The client 201fc07716bSJeffrey Hugo * function may be called multiple times. 202fc07716bSJeffrey Hugo */ 203cd33a5c1SArd Biesheuvel efi_status_t efi_exit_boot_services(void *handle, 204fc07716bSJeffrey Hugo struct efi_boot_memmap *map, 205fc07716bSJeffrey Hugo void *priv, 206fc07716bSJeffrey Hugo efi_exit_boot_map_processing priv_func) 207fc07716bSJeffrey Hugo { 208fc07716bSJeffrey Hugo efi_status_t status; 209fc07716bSJeffrey Hugo 210cd33a5c1SArd Biesheuvel status = efi_get_memory_map(map); 211fc07716bSJeffrey Hugo 212fc07716bSJeffrey Hugo if (status != EFI_SUCCESS) 213fc07716bSJeffrey Hugo goto fail; 214fc07716bSJeffrey Hugo 215cd33a5c1SArd Biesheuvel status = priv_func(map, priv); 216fc07716bSJeffrey Hugo if (status != EFI_SUCCESS) 217fc07716bSJeffrey Hugo goto free_map; 218fc07716bSJeffrey Hugo 2194444f854SMatthew Garrett if (efi_disable_pci_dma) 2204444f854SMatthew Garrett efi_pci_disable_bridge_busmaster(); 2214444f854SMatthew Garrett 222966291f6SArd Biesheuvel status = efi_bs_call(exit_boot_services, handle, *map->key_ptr); 223fc07716bSJeffrey Hugo 224fc07716bSJeffrey Hugo if (status == EFI_INVALID_PARAMETER) { 225fc07716bSJeffrey Hugo /* 226fc07716bSJeffrey Hugo * The memory map changed between efi_get_memory_map() and 227fc07716bSJeffrey Hugo * exit_boot_services(). Per the UEFI Spec v2.6, Section 6.4: 228fc07716bSJeffrey Hugo * EFI_BOOT_SERVICES.ExitBootServices we need to get the 229fc07716bSJeffrey Hugo * updated map, and try again. The spec implies one retry 230fc07716bSJeffrey Hugo * should be sufficent, which is confirmed against the EDK2 231fc07716bSJeffrey Hugo * implementation. Per the spec, we can only invoke 232fc07716bSJeffrey Hugo * get_memory_map() and exit_boot_services() - we cannot alloc 233fc07716bSJeffrey Hugo * so efi_get_memory_map() cannot be used, and we must reuse 234fc07716bSJeffrey Hugo * the buffer. For all practical purposes, the headroom in the 235fc07716bSJeffrey Hugo * buffer should account for any changes in the map so the call 236fc07716bSJeffrey Hugo * to get_memory_map() is expected to succeed here. 237fc07716bSJeffrey Hugo */ 238fc07716bSJeffrey Hugo *map->map_size = *map->buff_size; 239966291f6SArd Biesheuvel status = efi_bs_call(get_memory_map, 240fc07716bSJeffrey Hugo map->map_size, 241fc07716bSJeffrey Hugo *map->map, 242fc07716bSJeffrey Hugo map->key_ptr, 243fc07716bSJeffrey Hugo map->desc_size, 244fc07716bSJeffrey Hugo map->desc_ver); 245fc07716bSJeffrey Hugo 246fc07716bSJeffrey Hugo /* exit_boot_services() was called, thus cannot free */ 247fc07716bSJeffrey Hugo if (status != EFI_SUCCESS) 248fc07716bSJeffrey Hugo goto fail; 249fc07716bSJeffrey Hugo 250cd33a5c1SArd Biesheuvel status = priv_func(map, priv); 251fc07716bSJeffrey Hugo /* exit_boot_services() was called, thus cannot free */ 252fc07716bSJeffrey Hugo if (status != EFI_SUCCESS) 253fc07716bSJeffrey Hugo goto fail; 254fc07716bSJeffrey Hugo 255966291f6SArd Biesheuvel status = efi_bs_call(exit_boot_services, handle, *map->key_ptr); 256fc07716bSJeffrey Hugo } 257fc07716bSJeffrey Hugo 258fc07716bSJeffrey Hugo /* exit_boot_services() was called, thus cannot free */ 259fc07716bSJeffrey Hugo if (status != EFI_SUCCESS) 260fc07716bSJeffrey Hugo goto fail; 261fc07716bSJeffrey Hugo 262fc07716bSJeffrey Hugo return EFI_SUCCESS; 263fc07716bSJeffrey Hugo 264fc07716bSJeffrey Hugo free_map: 265966291f6SArd Biesheuvel efi_bs_call(free_pool, *map->map); 266fc07716bSJeffrey Hugo fail: 267fc07716bSJeffrey Hugo return status; 268fc07716bSJeffrey Hugo } 26982d736acSMatthew Garrett 270cd33a5c1SArd Biesheuvel void *get_efi_config_table(efi_guid_t guid) 27182d736acSMatthew Garrett { 272ccc27ae7SArd Biesheuvel unsigned long tables = efi_table_attr(efi_system_table, tables); 273ccc27ae7SArd Biesheuvel int nr_tables = efi_table_attr(efi_system_table, nr_tables); 274f958efe9SArd Biesheuvel int i; 275f958efe9SArd Biesheuvel 276f958efe9SArd Biesheuvel for (i = 0; i < nr_tables; i++) { 277f958efe9SArd Biesheuvel efi_config_table_t *t = (void *)tables; 278f958efe9SArd Biesheuvel 279f958efe9SArd Biesheuvel if (efi_guidcmp(t->guid, guid) == 0) 28099ea8b1dSArd Biesheuvel return efi_table_attr(t, table); 281f958efe9SArd Biesheuvel 282f958efe9SArd Biesheuvel tables += efi_is_native() ? sizeof(efi_config_table_t) 283f958efe9SArd Biesheuvel : sizeof(efi_config_table_32_t); 284f958efe9SArd Biesheuvel } 285f958efe9SArd Biesheuvel return NULL; 28682d736acSMatthew Garrett } 287dc29da14SArd Biesheuvel 288ec93fc37SArd Biesheuvel /* 289ec93fc37SArd Biesheuvel * The LINUX_EFI_INITRD_MEDIA_GUID vendor media device path below provides a way 290ec93fc37SArd Biesheuvel * for the firmware or bootloader to expose the initrd data directly to the stub 291ec93fc37SArd Biesheuvel * via the trivial LoadFile2 protocol, which is defined in the UEFI spec, and is 292ec93fc37SArd Biesheuvel * very easy to implement. It is a simple Linux initrd specific conduit between 293ec93fc37SArd Biesheuvel * kernel and firmware, allowing us to put the EFI stub (being part of the 294ec93fc37SArd Biesheuvel * kernel) in charge of where and when to load the initrd, while leaving it up 295ec93fc37SArd Biesheuvel * to the firmware to decide whether it needs to expose its filesystem hierarchy 296ec93fc37SArd Biesheuvel * via EFI protocols. 297ec93fc37SArd Biesheuvel */ 298ec93fc37SArd Biesheuvel static const struct { 299ec93fc37SArd Biesheuvel struct efi_vendor_dev_path vendor; 300ec93fc37SArd Biesheuvel struct efi_generic_dev_path end; 301ec93fc37SArd Biesheuvel } __packed initrd_dev_path = { 302ec93fc37SArd Biesheuvel { 303ec93fc37SArd Biesheuvel { 304ec93fc37SArd Biesheuvel EFI_DEV_MEDIA, 305ec93fc37SArd Biesheuvel EFI_DEV_MEDIA_VENDOR, 306ec93fc37SArd Biesheuvel sizeof(struct efi_vendor_dev_path), 307ec93fc37SArd Biesheuvel }, 308ec93fc37SArd Biesheuvel LINUX_EFI_INITRD_MEDIA_GUID 309ec93fc37SArd Biesheuvel }, { 310ec93fc37SArd Biesheuvel EFI_DEV_END_PATH, 311ec93fc37SArd Biesheuvel EFI_DEV_END_ENTIRE, 312ec93fc37SArd Biesheuvel sizeof(struct efi_generic_dev_path) 313ec93fc37SArd Biesheuvel } 314ec93fc37SArd Biesheuvel }; 315ec93fc37SArd Biesheuvel 316ec93fc37SArd Biesheuvel /** 317ec93fc37SArd Biesheuvel * efi_load_initrd_dev_path - load the initrd from the Linux initrd device path 318ec93fc37SArd Biesheuvel * @load_addr: pointer to store the address where the initrd was loaded 319ec93fc37SArd Biesheuvel * @load_size: pointer to store the size of the loaded initrd 320ec93fc37SArd Biesheuvel * @max: upper limit for the initrd memory allocation 321ec93fc37SArd Biesheuvel * @return: %EFI_SUCCESS if the initrd was loaded successfully, in which 322ec93fc37SArd Biesheuvel * case @load_addr and @load_size are assigned accordingly 323ec93fc37SArd Biesheuvel * %EFI_NOT_FOUND if no LoadFile2 protocol exists on the initrd 324ec93fc37SArd Biesheuvel * device path 325ec93fc37SArd Biesheuvel * %EFI_INVALID_PARAMETER if load_addr == NULL or load_size == NULL 326ec93fc37SArd Biesheuvel * %EFI_OUT_OF_RESOURCES if memory allocation failed 327ec93fc37SArd Biesheuvel * %EFI_LOAD_ERROR in all other cases 328ec93fc37SArd Biesheuvel */ 329f61900fdSArvind Sankar static 330ec93fc37SArd Biesheuvel efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr, 331ec93fc37SArd Biesheuvel unsigned long *load_size, 332ec93fc37SArd Biesheuvel unsigned long max) 333ec93fc37SArd Biesheuvel { 334ec93fc37SArd Biesheuvel efi_guid_t lf2_proto_guid = EFI_LOAD_FILE2_PROTOCOL_GUID; 335ec93fc37SArd Biesheuvel efi_device_path_protocol_t *dp; 336ec93fc37SArd Biesheuvel efi_load_file2_protocol_t *lf2; 337ec93fc37SArd Biesheuvel unsigned long initrd_addr; 338ec93fc37SArd Biesheuvel unsigned long initrd_size; 339ec93fc37SArd Biesheuvel efi_handle_t handle; 340ec93fc37SArd Biesheuvel efi_status_t status; 341ec93fc37SArd Biesheuvel 342ec93fc37SArd Biesheuvel dp = (efi_device_path_protocol_t *)&initrd_dev_path; 343ec93fc37SArd Biesheuvel status = efi_bs_call(locate_device_path, &lf2_proto_guid, &dp, &handle); 344ec93fc37SArd Biesheuvel if (status != EFI_SUCCESS) 345ec93fc37SArd Biesheuvel return status; 346ec93fc37SArd Biesheuvel 347ec93fc37SArd Biesheuvel status = efi_bs_call(handle_protocol, handle, &lf2_proto_guid, 348ec93fc37SArd Biesheuvel (void **)&lf2); 349ec93fc37SArd Biesheuvel if (status != EFI_SUCCESS) 350ec93fc37SArd Biesheuvel return status; 351ec93fc37SArd Biesheuvel 352ec93fc37SArd Biesheuvel status = efi_call_proto(lf2, load_file, dp, false, &initrd_size, NULL); 353ec93fc37SArd Biesheuvel if (status != EFI_BUFFER_TOO_SMALL) 354ec93fc37SArd Biesheuvel return EFI_LOAD_ERROR; 355ec93fc37SArd Biesheuvel 356ec93fc37SArd Biesheuvel status = efi_allocate_pages(initrd_size, &initrd_addr, max); 357ec93fc37SArd Biesheuvel if (status != EFI_SUCCESS) 358ec93fc37SArd Biesheuvel return status; 359ec93fc37SArd Biesheuvel 360ec93fc37SArd Biesheuvel status = efi_call_proto(lf2, load_file, dp, false, &initrd_size, 361ec93fc37SArd Biesheuvel (void *)initrd_addr); 362ec93fc37SArd Biesheuvel if (status != EFI_SUCCESS) { 363ec93fc37SArd Biesheuvel efi_free(initrd_size, initrd_addr); 364ec93fc37SArd Biesheuvel return EFI_LOAD_ERROR; 365ec93fc37SArd Biesheuvel } 366ec93fc37SArd Biesheuvel 367ec93fc37SArd Biesheuvel *load_addr = initrd_addr; 368ec93fc37SArd Biesheuvel *load_size = initrd_size; 369ec93fc37SArd Biesheuvel return EFI_SUCCESS; 370ec93fc37SArd Biesheuvel } 371f61900fdSArvind Sankar 372f61900fdSArvind Sankar static 373f61900fdSArvind Sankar efi_status_t efi_load_initrd_cmdline(efi_loaded_image_t *image, 374f61900fdSArvind Sankar unsigned long *load_addr, 375f61900fdSArvind Sankar unsigned long *load_size, 376f61900fdSArvind Sankar unsigned long soft_limit, 377f61900fdSArvind Sankar unsigned long hard_limit) 378f61900fdSArvind Sankar { 379f61900fdSArvind Sankar if (!IS_ENABLED(CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER) || 380f61900fdSArvind Sankar (IS_ENABLED(CONFIG_X86) && (!efi_is_native() || image == NULL))) { 381f61900fdSArvind Sankar *load_addr = *load_size = 0; 382f61900fdSArvind Sankar return EFI_SUCCESS; 383f61900fdSArvind Sankar } 384f61900fdSArvind Sankar 385f61900fdSArvind Sankar return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2, 386f61900fdSArvind Sankar soft_limit, hard_limit, 387f61900fdSArvind Sankar load_addr, load_size); 388f61900fdSArvind Sankar } 389f61900fdSArvind Sankar 390f61900fdSArvind Sankar efi_status_t efi_load_initrd(efi_loaded_image_t *image, 391f61900fdSArvind Sankar unsigned long *load_addr, 392f61900fdSArvind Sankar unsigned long *load_size, 393f61900fdSArvind Sankar unsigned long soft_limit, 394f61900fdSArvind Sankar unsigned long hard_limit) 395f61900fdSArvind Sankar { 396f61900fdSArvind Sankar efi_status_t status; 397f61900fdSArvind Sankar 398f61900fdSArvind Sankar if (!load_addr || !load_size) 399f61900fdSArvind Sankar return EFI_INVALID_PARAMETER; 400f61900fdSArvind Sankar 401f61900fdSArvind Sankar status = efi_load_initrd_dev_path(load_addr, load_size, hard_limit); 402f61900fdSArvind Sankar if (status == EFI_SUCCESS) { 403f61900fdSArvind Sankar efi_info("Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path\n"); 404f61900fdSArvind Sankar } else if (status == EFI_NOT_FOUND) { 405f61900fdSArvind Sankar status = efi_load_initrd_cmdline(image, load_addr, load_size, 406f61900fdSArvind Sankar soft_limit, hard_limit); 407f61900fdSArvind Sankar if (status == EFI_SUCCESS && *load_size > 0) 408f61900fdSArvind Sankar efi_info("Loaded initrd from command line option\n"); 409f61900fdSArvind Sankar } 410f61900fdSArvind Sankar 411f61900fdSArvind Sankar return status; 412f61900fdSArvind Sankar } 413