1c2d0b470SArd Biesheuvel // SPDX-License-Identifier: GPL-2.0-only 2c2d0b470SArd Biesheuvel 3c2d0b470SArd Biesheuvel /* ----------------------------------------------------------------------- 4c2d0b470SArd Biesheuvel * 5c2d0b470SArd Biesheuvel * Copyright 2011 Intel Corporation; author Matt Fleming 6c2d0b470SArd Biesheuvel * 7c2d0b470SArd Biesheuvel * ----------------------------------------------------------------------- */ 8c2d0b470SArd Biesheuvel 9c2d0b470SArd Biesheuvel #include <linux/efi.h> 10c2d0b470SArd Biesheuvel #include <linux/pci.h> 1159476f80SArvind Sankar #include <linux/stddef.h> 12c2d0b470SArd Biesheuvel 13c2d0b470SArd Biesheuvel #include <asm/efi.h> 14c2d0b470SArd Biesheuvel #include <asm/e820/types.h> 15c2d0b470SArd Biesheuvel #include <asm/setup.h> 16c2d0b470SArd Biesheuvel #include <asm/desc.h> 17c2d0b470SArd Biesheuvel #include <asm/boot.h> 18c2d0b470SArd Biesheuvel 19c2d0b470SArd Biesheuvel #include "efistub.h" 20cb1c9e02SArd Biesheuvel #include "x86-stub.h" 21c2d0b470SArd Biesheuvel 22d5cdf4cfSArvind Sankar /* Maximum physical address for 64-bit kernel with 4-level paging */ 23d5cdf4cfSArvind Sankar #define MAXMEM_X86_64_4LEVEL (1ull << 46) 24d5cdf4cfSArvind Sankar 25ccc27ae7SArd Biesheuvel const efi_system_table_t *efi_system_table; 263ba75c13SBaskov Evgeniy const efi_dxe_services_table_t *efi_dxe_table; 274b520162SArd Biesheuvel u32 image_offset __section(".data"); 28987053a3SArvind Sankar static efi_loaded_image_t *image = NULL; 29*11078876SArd Biesheuvel static efi_memory_attribute_protocol_t *memattr; 30c2d0b470SArd Biesheuvel 31c0461bd1SDionna Glaze typedef union sev_memory_acceptance_protocol sev_memory_acceptance_protocol_t; 32c0461bd1SDionna Glaze union sev_memory_acceptance_protocol { 33c0461bd1SDionna Glaze struct { 34c0461bd1SDionna Glaze efi_status_t (__efiapi * allow_unaccepted_memory)( 35c0461bd1SDionna Glaze sev_memory_acceptance_protocol_t *); 36c0461bd1SDionna Glaze }; 37c0461bd1SDionna Glaze struct { 38c0461bd1SDionna Glaze u32 allow_unaccepted_memory; 39c0461bd1SDionna Glaze } mixed_mode; 40c0461bd1SDionna Glaze }; 41c0461bd1SDionna Glaze 42c2d0b470SArd Biesheuvel static efi_status_t 43c2d0b470SArd Biesheuvel preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) 44c2d0b470SArd Biesheuvel { 45c2d0b470SArd Biesheuvel struct pci_setup_rom *rom = NULL; 46c2d0b470SArd Biesheuvel efi_status_t status; 47c2d0b470SArd Biesheuvel unsigned long size; 48c2d0b470SArd Biesheuvel uint64_t romsize; 49c2d0b470SArd Biesheuvel void *romimage; 50c2d0b470SArd Biesheuvel 51c2d0b470SArd Biesheuvel /* 52c2d0b470SArd Biesheuvel * Some firmware images contain EFI function pointers at the place where 53c2d0b470SArd Biesheuvel * the romimage and romsize fields are supposed to be. Typically the EFI 54c2d0b470SArd Biesheuvel * code is mapped at high addresses, translating to an unrealistically 55c2d0b470SArd Biesheuvel * large romsize. The UEFI spec limits the size of option ROMs to 16 56c2d0b470SArd Biesheuvel * MiB so we reject any ROMs over 16 MiB in size to catch this. 57c2d0b470SArd Biesheuvel */ 58c2d0b470SArd Biesheuvel romimage = efi_table_attr(pci, romimage); 59c2d0b470SArd Biesheuvel romsize = efi_table_attr(pci, romsize); 60c2d0b470SArd Biesheuvel if (!romimage || !romsize || romsize > SZ_16M) 61c2d0b470SArd Biesheuvel return EFI_INVALID_PARAMETER; 62c2d0b470SArd Biesheuvel 63c2d0b470SArd Biesheuvel size = romsize + sizeof(*rom); 64c2d0b470SArd Biesheuvel 65c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 66c2d0b470SArd Biesheuvel (void **)&rom); 67c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 6836bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'rom'\n"); 69c2d0b470SArd Biesheuvel return status; 70c2d0b470SArd Biesheuvel } 71c2d0b470SArd Biesheuvel 72c2d0b470SArd Biesheuvel memset(rom, 0, sizeof(*rom)); 73c2d0b470SArd Biesheuvel 74c2d0b470SArd Biesheuvel rom->data.type = SETUP_PCI; 75c2d0b470SArd Biesheuvel rom->data.len = size - sizeof(struct setup_data); 76c2d0b470SArd Biesheuvel rom->data.next = 0; 77c2d0b470SArd Biesheuvel rom->pcilen = pci->romsize; 78c2d0b470SArd Biesheuvel *__rom = rom; 79c2d0b470SArd Biesheuvel 80c2d0b470SArd Biesheuvel status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, 81c2d0b470SArd Biesheuvel PCI_VENDOR_ID, 1, &rom->vendor); 82c2d0b470SArd Biesheuvel 83c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 8436bdd0a7SArvind Sankar efi_err("Failed to read rom->vendor\n"); 85c2d0b470SArd Biesheuvel goto free_struct; 86c2d0b470SArd Biesheuvel } 87c2d0b470SArd Biesheuvel 88c2d0b470SArd Biesheuvel status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, 89c2d0b470SArd Biesheuvel PCI_DEVICE_ID, 1, &rom->devid); 90c2d0b470SArd Biesheuvel 91c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 9236bdd0a7SArvind Sankar efi_err("Failed to read rom->devid\n"); 93c2d0b470SArd Biesheuvel goto free_struct; 94c2d0b470SArd Biesheuvel } 95c2d0b470SArd Biesheuvel 96c2d0b470SArd Biesheuvel status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, 97c2d0b470SArd Biesheuvel &rom->device, &rom->function); 98c2d0b470SArd Biesheuvel 99c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 100c2d0b470SArd Biesheuvel goto free_struct; 101c2d0b470SArd Biesheuvel 102c2d0b470SArd Biesheuvel memcpy(rom->romdata, romimage, romsize); 103c2d0b470SArd Biesheuvel return status; 104c2d0b470SArd Biesheuvel 105c2d0b470SArd Biesheuvel free_struct: 106c2d0b470SArd Biesheuvel efi_bs_call(free_pool, rom); 107c2d0b470SArd Biesheuvel return status; 108c2d0b470SArd Biesheuvel } 109c2d0b470SArd Biesheuvel 110c2d0b470SArd Biesheuvel /* 111c2d0b470SArd Biesheuvel * There's no way to return an informative status from this function, 112c2d0b470SArd Biesheuvel * because any analysis (and printing of error messages) needs to be 113c2d0b470SArd Biesheuvel * done directly at the EFI function call-site. 114c2d0b470SArd Biesheuvel * 115c2d0b470SArd Biesheuvel * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we 116c2d0b470SArd Biesheuvel * just didn't find any PCI devices, but there's no way to tell outside 117c2d0b470SArd Biesheuvel * the context of the call. 118c2d0b470SArd Biesheuvel */ 119c2d0b470SArd Biesheuvel static void setup_efi_pci(struct boot_params *params) 120c2d0b470SArd Biesheuvel { 121c2d0b470SArd Biesheuvel efi_status_t status; 122c2d0b470SArd Biesheuvel void **pci_handle = NULL; 123c2d0b470SArd Biesheuvel efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; 124c2d0b470SArd Biesheuvel unsigned long size = 0; 125c2d0b470SArd Biesheuvel struct setup_data *data; 126c2d0b470SArd Biesheuvel efi_handle_t h; 127c2d0b470SArd Biesheuvel int i; 128c2d0b470SArd Biesheuvel 129c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 130c2d0b470SArd Biesheuvel &pci_proto, NULL, &size, pci_handle); 131c2d0b470SArd Biesheuvel 132c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) { 133c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 134c2d0b470SArd Biesheuvel (void **)&pci_handle); 135c2d0b470SArd Biesheuvel 136c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 13736bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'pci_handle'\n"); 138c2d0b470SArd Biesheuvel return; 139c2d0b470SArd Biesheuvel } 140c2d0b470SArd Biesheuvel 141c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 142c2d0b470SArd Biesheuvel &pci_proto, NULL, &size, pci_handle); 143c2d0b470SArd Biesheuvel } 144c2d0b470SArd Biesheuvel 145c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 146c2d0b470SArd Biesheuvel goto free_handle; 147c2d0b470SArd Biesheuvel 148c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)params->hdr.setup_data; 149c2d0b470SArd Biesheuvel 150c2d0b470SArd Biesheuvel while (data && data->next) 151c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 152c2d0b470SArd Biesheuvel 153c2d0b470SArd Biesheuvel for_each_efi_handle(h, pci_handle, size, i) { 154c2d0b470SArd Biesheuvel efi_pci_io_protocol_t *pci = NULL; 155c2d0b470SArd Biesheuvel struct pci_setup_rom *rom; 156c2d0b470SArd Biesheuvel 157c2d0b470SArd Biesheuvel status = efi_bs_call(handle_protocol, h, &pci_proto, 158c2d0b470SArd Biesheuvel (void **)&pci); 159c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS || !pci) 160c2d0b470SArd Biesheuvel continue; 161c2d0b470SArd Biesheuvel 162c2d0b470SArd Biesheuvel status = preserve_pci_rom_image(pci, &rom); 163c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 164c2d0b470SArd Biesheuvel continue; 165c2d0b470SArd Biesheuvel 166c2d0b470SArd Biesheuvel if (data) 167c2d0b470SArd Biesheuvel data->next = (unsigned long)rom; 168c2d0b470SArd Biesheuvel else 169c2d0b470SArd Biesheuvel params->hdr.setup_data = (unsigned long)rom; 170c2d0b470SArd Biesheuvel 171c2d0b470SArd Biesheuvel data = (struct setup_data *)rom; 172c2d0b470SArd Biesheuvel } 173c2d0b470SArd Biesheuvel 174c2d0b470SArd Biesheuvel free_handle: 175c2d0b470SArd Biesheuvel efi_bs_call(free_pool, pci_handle); 176c2d0b470SArd Biesheuvel } 177c2d0b470SArd Biesheuvel 178c2d0b470SArd Biesheuvel static void retrieve_apple_device_properties(struct boot_params *boot_params) 179c2d0b470SArd Biesheuvel { 180c2d0b470SArd Biesheuvel efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; 181c2d0b470SArd Biesheuvel struct setup_data *data, *new; 182c2d0b470SArd Biesheuvel efi_status_t status; 183c2d0b470SArd Biesheuvel u32 size = 0; 184c2d0b470SArd Biesheuvel apple_properties_protocol_t *p; 185c2d0b470SArd Biesheuvel 186c2d0b470SArd Biesheuvel status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); 187c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 188c2d0b470SArd Biesheuvel return; 189c2d0b470SArd Biesheuvel 190c2d0b470SArd Biesheuvel if (efi_table_attr(p, version) != 0x10000) { 19136bdd0a7SArvind Sankar efi_err("Unsupported properties proto version\n"); 192c2d0b470SArd Biesheuvel return; 193c2d0b470SArd Biesheuvel } 194c2d0b470SArd Biesheuvel 195c2d0b470SArd Biesheuvel efi_call_proto(p, get_all, NULL, &size); 196c2d0b470SArd Biesheuvel if (!size) 197c2d0b470SArd Biesheuvel return; 198c2d0b470SArd Biesheuvel 199c2d0b470SArd Biesheuvel do { 200c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, 201c2d0b470SArd Biesheuvel size + sizeof(struct setup_data), 202c2d0b470SArd Biesheuvel (void **)&new); 203c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 20436bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'properties'\n"); 205c2d0b470SArd Biesheuvel return; 206c2d0b470SArd Biesheuvel } 207c2d0b470SArd Biesheuvel 208c2d0b470SArd Biesheuvel status = efi_call_proto(p, get_all, new->data, &size); 209c2d0b470SArd Biesheuvel 210c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 211c2d0b470SArd Biesheuvel efi_bs_call(free_pool, new); 212c2d0b470SArd Biesheuvel } while (status == EFI_BUFFER_TOO_SMALL); 213c2d0b470SArd Biesheuvel 214c2d0b470SArd Biesheuvel new->type = SETUP_APPLE_PROPERTIES; 215c2d0b470SArd Biesheuvel new->len = size; 216c2d0b470SArd Biesheuvel new->next = 0; 217c2d0b470SArd Biesheuvel 218c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; 219c2d0b470SArd Biesheuvel if (!data) { 220c2d0b470SArd Biesheuvel boot_params->hdr.setup_data = (unsigned long)new; 221c2d0b470SArd Biesheuvel } else { 222c2d0b470SArd Biesheuvel while (data->next) 223c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 224c2d0b470SArd Biesheuvel data->next = (unsigned long)new; 225c2d0b470SArd Biesheuvel } 226c2d0b470SArd Biesheuvel } 227c2d0b470SArd Biesheuvel 228cb1c9e02SArd Biesheuvel void efi_adjust_memory_range_protection(unsigned long start, 229cb1c9e02SArd Biesheuvel unsigned long size) 23082e0d6d7SBaskov Evgeniy { 23182e0d6d7SBaskov Evgeniy efi_status_t status; 23282e0d6d7SBaskov Evgeniy efi_gcd_memory_space_desc_t desc; 23382e0d6d7SBaskov Evgeniy unsigned long end, next; 23482e0d6d7SBaskov Evgeniy unsigned long rounded_start, rounded_end; 23582e0d6d7SBaskov Evgeniy unsigned long unprotect_start, unprotect_size; 23682e0d6d7SBaskov Evgeniy 23782e0d6d7SBaskov Evgeniy rounded_start = rounddown(start, EFI_PAGE_SIZE); 23882e0d6d7SBaskov Evgeniy rounded_end = roundup(start + size, EFI_PAGE_SIZE); 23982e0d6d7SBaskov Evgeniy 240*11078876SArd Biesheuvel if (memattr != NULL) { 241*11078876SArd Biesheuvel efi_call_proto(memattr, clear_memory_attributes, rounded_start, 242*11078876SArd Biesheuvel rounded_end - rounded_start, EFI_MEMORY_XP); 243*11078876SArd Biesheuvel return; 244*11078876SArd Biesheuvel } 245*11078876SArd Biesheuvel 246*11078876SArd Biesheuvel if (efi_dxe_table == NULL) 247*11078876SArd Biesheuvel return; 248*11078876SArd Biesheuvel 24982e0d6d7SBaskov Evgeniy /* 25082e0d6d7SBaskov Evgeniy * Don't modify memory region attributes, they are 25182e0d6d7SBaskov Evgeniy * already suitable, to lower the possibility to 25282e0d6d7SBaskov Evgeniy * encounter firmware bugs. 25382e0d6d7SBaskov Evgeniy */ 25482e0d6d7SBaskov Evgeniy 25582e0d6d7SBaskov Evgeniy for (end = start + size; start < end; start = next) { 25682e0d6d7SBaskov Evgeniy 25782e0d6d7SBaskov Evgeniy status = efi_dxe_call(get_memory_space_descriptor, start, &desc); 25882e0d6d7SBaskov Evgeniy 25982e0d6d7SBaskov Evgeniy if (status != EFI_SUCCESS) 26082e0d6d7SBaskov Evgeniy return; 26182e0d6d7SBaskov Evgeniy 26282e0d6d7SBaskov Evgeniy next = desc.base_address + desc.length; 26382e0d6d7SBaskov Evgeniy 26482e0d6d7SBaskov Evgeniy /* 26582e0d6d7SBaskov Evgeniy * Only system memory is suitable for trampoline/kernel image placement, 26682e0d6d7SBaskov Evgeniy * so only this type of memory needs its attributes to be modified. 26782e0d6d7SBaskov Evgeniy */ 26882e0d6d7SBaskov Evgeniy 26982e0d6d7SBaskov Evgeniy if (desc.gcd_memory_type != EfiGcdMemoryTypeSystemMemory || 27082e0d6d7SBaskov Evgeniy (desc.attributes & (EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0) 27182e0d6d7SBaskov Evgeniy continue; 27282e0d6d7SBaskov Evgeniy 27382e0d6d7SBaskov Evgeniy unprotect_start = max(rounded_start, (unsigned long)desc.base_address); 27482e0d6d7SBaskov Evgeniy unprotect_size = min(rounded_end, next) - unprotect_start; 27582e0d6d7SBaskov Evgeniy 27682e0d6d7SBaskov Evgeniy status = efi_dxe_call(set_memory_space_attributes, 27782e0d6d7SBaskov Evgeniy unprotect_start, unprotect_size, 27882e0d6d7SBaskov Evgeniy EFI_MEMORY_WB); 27982e0d6d7SBaskov Evgeniy 28082e0d6d7SBaskov Evgeniy if (status != EFI_SUCCESS) { 28131f1a0edSArd Biesheuvel efi_warn("Unable to unprotect memory range [%08lx,%08lx]: %lx\n", 28282e0d6d7SBaskov Evgeniy unprotect_start, 28382e0d6d7SBaskov Evgeniy unprotect_start + unprotect_size, 28431f1a0edSArd Biesheuvel status); 28582e0d6d7SBaskov Evgeniy } 28682e0d6d7SBaskov Evgeniy } 28782e0d6d7SBaskov Evgeniy } 28882e0d6d7SBaskov Evgeniy 289d2d7a54fSArd Biesheuvel extern const u8 startup_32[], startup_64[]; 29082e0d6d7SBaskov Evgeniy 29182e0d6d7SBaskov Evgeniy static void 29282e0d6d7SBaskov Evgeniy setup_memory_protection(unsigned long image_base, unsigned long image_size) 29382e0d6d7SBaskov Evgeniy { 29482e0d6d7SBaskov Evgeniy #ifdef CONFIG_64BIT 29582e0d6d7SBaskov Evgeniy if (image_base != (unsigned long)startup_32) 296cb1c9e02SArd Biesheuvel efi_adjust_memory_range_protection(image_base, image_size); 29782e0d6d7SBaskov Evgeniy #else 29882e0d6d7SBaskov Evgeniy /* 29982e0d6d7SBaskov Evgeniy * Clear protection flags on a whole range of possible 30082e0d6d7SBaskov Evgeniy * addresses used for KASLR. We don't need to do that 30182e0d6d7SBaskov Evgeniy * on x86_64, since KASLR/extraction is performed after 30282e0d6d7SBaskov Evgeniy * dedicated identity page tables are built and we only 30382e0d6d7SBaskov Evgeniy * need to remove possible protection on relocated image 30482e0d6d7SBaskov Evgeniy * itself disregarding further relocations. 30582e0d6d7SBaskov Evgeniy */ 306cb1c9e02SArd Biesheuvel efi_adjust_memory_range_protection(LOAD_PHYSICAL_ADDR, 30782e0d6d7SBaskov Evgeniy KERNEL_IMAGE_SIZE - LOAD_PHYSICAL_ADDR); 30882e0d6d7SBaskov Evgeniy #endif 30982e0d6d7SBaskov Evgeniy } 31082e0d6d7SBaskov Evgeniy 311c0461bd1SDionna Glaze static void setup_unaccepted_memory(void) 312c0461bd1SDionna Glaze { 313c0461bd1SDionna Glaze efi_guid_t mem_acceptance_proto = OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID; 314c0461bd1SDionna Glaze sev_memory_acceptance_protocol_t *proto; 315c0461bd1SDionna Glaze efi_status_t status; 316c0461bd1SDionna Glaze 317c0461bd1SDionna Glaze if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) 318c0461bd1SDionna Glaze return; 319c0461bd1SDionna Glaze 320c0461bd1SDionna Glaze /* 321c0461bd1SDionna Glaze * Enable unaccepted memory before calling exit boot services in order 322c0461bd1SDionna Glaze * for the UEFI to not accept all memory on EBS. 323c0461bd1SDionna Glaze */ 324c0461bd1SDionna Glaze status = efi_bs_call(locate_protocol, &mem_acceptance_proto, NULL, 325c0461bd1SDionna Glaze (void **)&proto); 326c0461bd1SDionna Glaze if (status != EFI_SUCCESS) 327c0461bd1SDionna Glaze return; 328c0461bd1SDionna Glaze 329c0461bd1SDionna Glaze status = efi_call_proto(proto, allow_unaccepted_memory); 330c0461bd1SDionna Glaze if (status != EFI_SUCCESS) 331c0461bd1SDionna Glaze efi_err("Memory acceptance protocol failed\n"); 332c0461bd1SDionna Glaze } 333c0461bd1SDionna Glaze 334c2d0b470SArd Biesheuvel static const efi_char16_t apple[] = L"Apple"; 335c2d0b470SArd Biesheuvel 33682e0d6d7SBaskov Evgeniy static void setup_quirks(struct boot_params *boot_params, 33782e0d6d7SBaskov Evgeniy unsigned long image_base, 33882e0d6d7SBaskov Evgeniy unsigned long image_size) 339c2d0b470SArd Biesheuvel { 340c2d0b470SArd Biesheuvel efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) 341ccc27ae7SArd Biesheuvel efi_table_attr(efi_system_table, fw_vendor); 342c2d0b470SArd Biesheuvel 343c2d0b470SArd Biesheuvel if (!memcmp(fw_vendor, apple, sizeof(apple))) { 344c2d0b470SArd Biesheuvel if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) 345c2d0b470SArd Biesheuvel retrieve_apple_device_properties(boot_params); 346c2d0b470SArd Biesheuvel } 34782e0d6d7SBaskov Evgeniy 34882e0d6d7SBaskov Evgeniy if (IS_ENABLED(CONFIG_EFI_DXE_MEM_ATTRIBUTES)) 34982e0d6d7SBaskov Evgeniy setup_memory_protection(image_base, image_size); 350c2d0b470SArd Biesheuvel } 351c2d0b470SArd Biesheuvel 352c2d0b470SArd Biesheuvel /* 353c2d0b470SArd Biesheuvel * See if we have Universal Graphics Adapter (UGA) protocol 354c2d0b470SArd Biesheuvel */ 355c2d0b470SArd Biesheuvel static efi_status_t 356c2d0b470SArd Biesheuvel setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) 357c2d0b470SArd Biesheuvel { 358c2d0b470SArd Biesheuvel efi_status_t status; 359c2d0b470SArd Biesheuvel u32 width, height; 360c2d0b470SArd Biesheuvel void **uga_handle = NULL; 361c2d0b470SArd Biesheuvel efi_uga_draw_protocol_t *uga = NULL, *first_uga; 362c2d0b470SArd Biesheuvel efi_handle_t handle; 363c2d0b470SArd Biesheuvel int i; 364c2d0b470SArd Biesheuvel 365c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 366c2d0b470SArd Biesheuvel (void **)&uga_handle); 367c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 368c2d0b470SArd Biesheuvel return status; 369c2d0b470SArd Biesheuvel 370c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 371c2d0b470SArd Biesheuvel uga_proto, NULL, &size, uga_handle); 372c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 373c2d0b470SArd Biesheuvel goto free_handle; 374c2d0b470SArd Biesheuvel 375c2d0b470SArd Biesheuvel height = 0; 376c2d0b470SArd Biesheuvel width = 0; 377c2d0b470SArd Biesheuvel 378c2d0b470SArd Biesheuvel first_uga = NULL; 379c2d0b470SArd Biesheuvel for_each_efi_handle(handle, uga_handle, size, i) { 380c2d0b470SArd Biesheuvel efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; 381c2d0b470SArd Biesheuvel u32 w, h, depth, refresh; 382c2d0b470SArd Biesheuvel void *pciio; 383c2d0b470SArd Biesheuvel 384c2d0b470SArd Biesheuvel status = efi_bs_call(handle_protocol, handle, uga_proto, 385c2d0b470SArd Biesheuvel (void **)&uga); 386c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 387c2d0b470SArd Biesheuvel continue; 388c2d0b470SArd Biesheuvel 389c2d0b470SArd Biesheuvel pciio = NULL; 390c2d0b470SArd Biesheuvel efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); 391c2d0b470SArd Biesheuvel 392c2d0b470SArd Biesheuvel status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); 393c2d0b470SArd Biesheuvel if (status == EFI_SUCCESS && (!first_uga || pciio)) { 394c2d0b470SArd Biesheuvel width = w; 395c2d0b470SArd Biesheuvel height = h; 396c2d0b470SArd Biesheuvel 397c2d0b470SArd Biesheuvel /* 398c2d0b470SArd Biesheuvel * Once we've found a UGA supporting PCIIO, 399c2d0b470SArd Biesheuvel * don't bother looking any further. 400c2d0b470SArd Biesheuvel */ 401c2d0b470SArd Biesheuvel if (pciio) 402c2d0b470SArd Biesheuvel break; 403c2d0b470SArd Biesheuvel 404c2d0b470SArd Biesheuvel first_uga = uga; 405c2d0b470SArd Biesheuvel } 406c2d0b470SArd Biesheuvel } 407c2d0b470SArd Biesheuvel 408c2d0b470SArd Biesheuvel if (!width && !height) 409c2d0b470SArd Biesheuvel goto free_handle; 410c2d0b470SArd Biesheuvel 411c2d0b470SArd Biesheuvel /* EFI framebuffer */ 412c2d0b470SArd Biesheuvel si->orig_video_isVGA = VIDEO_TYPE_EFI; 413c2d0b470SArd Biesheuvel 414c2d0b470SArd Biesheuvel si->lfb_depth = 32; 415c2d0b470SArd Biesheuvel si->lfb_width = width; 416c2d0b470SArd Biesheuvel si->lfb_height = height; 417c2d0b470SArd Biesheuvel 418c2d0b470SArd Biesheuvel si->red_size = 8; 419c2d0b470SArd Biesheuvel si->red_pos = 16; 420c2d0b470SArd Biesheuvel si->green_size = 8; 421c2d0b470SArd Biesheuvel si->green_pos = 8; 422c2d0b470SArd Biesheuvel si->blue_size = 8; 423c2d0b470SArd Biesheuvel si->blue_pos = 0; 424c2d0b470SArd Biesheuvel si->rsvd_size = 8; 425c2d0b470SArd Biesheuvel si->rsvd_pos = 24; 426c2d0b470SArd Biesheuvel 427c2d0b470SArd Biesheuvel free_handle: 428c2d0b470SArd Biesheuvel efi_bs_call(free_pool, uga_handle); 429c2d0b470SArd Biesheuvel 430c2d0b470SArd Biesheuvel return status; 431c2d0b470SArd Biesheuvel } 432c2d0b470SArd Biesheuvel 433c2d0b470SArd Biesheuvel static void setup_graphics(struct boot_params *boot_params) 434c2d0b470SArd Biesheuvel { 435c2d0b470SArd Biesheuvel efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; 436c2d0b470SArd Biesheuvel struct screen_info *si; 437c2d0b470SArd Biesheuvel efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; 438c2d0b470SArd Biesheuvel efi_status_t status; 439c2d0b470SArd Biesheuvel unsigned long size; 440c2d0b470SArd Biesheuvel void **gop_handle = NULL; 441c2d0b470SArd Biesheuvel void **uga_handle = NULL; 442c2d0b470SArd Biesheuvel 443c2d0b470SArd Biesheuvel si = &boot_params->screen_info; 444c2d0b470SArd Biesheuvel memset(si, 0, sizeof(*si)); 445c2d0b470SArd Biesheuvel 446c2d0b470SArd Biesheuvel size = 0; 447c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 448c2d0b470SArd Biesheuvel &graphics_proto, NULL, &size, gop_handle); 449c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 450c2d0b470SArd Biesheuvel status = efi_setup_gop(si, &graphics_proto, size); 451c2d0b470SArd Biesheuvel 452c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 453c2d0b470SArd Biesheuvel size = 0; 454c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 455c2d0b470SArd Biesheuvel &uga_proto, NULL, &size, uga_handle); 456c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 457c2d0b470SArd Biesheuvel setup_uga(si, &uga_proto, size); 458c2d0b470SArd Biesheuvel } 459c2d0b470SArd Biesheuvel } 460c2d0b470SArd Biesheuvel 4613b8f44fcSArd Biesheuvel 4623b8f44fcSArd Biesheuvel static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status) 4633b8f44fcSArd Biesheuvel { 4643b8f44fcSArd Biesheuvel efi_bs_call(exit, handle, status, 0, NULL); 465f3fa0efcSArd Biesheuvel for(;;) 466f3fa0efcSArd Biesheuvel asm("hlt"); 4673b8f44fcSArd Biesheuvel } 4683b8f44fcSArd Biesheuvel 469c2d0b470SArd Biesheuvel void __noreturn efi_stub_entry(efi_handle_t handle, 470c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg, 471c2d0b470SArd Biesheuvel struct boot_params *boot_params); 472c2d0b470SArd Biesheuvel 473c2d0b470SArd Biesheuvel /* 474c2d0b470SArd Biesheuvel * Because the x86 boot code expects to be passed a boot_params we 475c2d0b470SArd Biesheuvel * need to create one ourselves (usually the bootloader would create 476c2d0b470SArd Biesheuvel * one for us). 477c2d0b470SArd Biesheuvel */ 478c2d0b470SArd Biesheuvel efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, 479c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg) 480c2d0b470SArd Biesheuvel { 481c2d0b470SArd Biesheuvel struct boot_params *boot_params; 482c2d0b470SArd Biesheuvel struct setup_header *hdr; 4831887c9b6SArvind Sankar void *image_base; 484c2d0b470SArd Biesheuvel efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; 485c2d0b470SArd Biesheuvel int options_size = 0; 486c2d0b470SArd Biesheuvel efi_status_t status; 487c2d0b470SArd Biesheuvel char *cmdline_ptr; 488c2d0b470SArd Biesheuvel 489ccc27ae7SArd Biesheuvel efi_system_table = sys_table_arg; 490c2d0b470SArd Biesheuvel 491c2d0b470SArd Biesheuvel /* Check if we were booted by the EFI firmware */ 492ccc27ae7SArd Biesheuvel if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 4933b8f44fcSArd Biesheuvel efi_exit(handle, EFI_INVALID_PARAMETER); 494c2d0b470SArd Biesheuvel 4950347d8c2SArvind Sankar status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image); 496c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 49736bdd0a7SArvind Sankar efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); 4983b8f44fcSArd Biesheuvel efi_exit(handle, status); 499c2d0b470SArd Biesheuvel } 500c2d0b470SArd Biesheuvel 5011887c9b6SArvind Sankar image_base = efi_table_attr(image, image_base); 5021887c9b6SArvind Sankar image_offset = (void *)startup_32 - image_base; 5031887c9b6SArvind Sankar 504019512f1SArvind Sankar status = efi_allocate_pages(sizeof(struct boot_params), 505019512f1SArvind Sankar (unsigned long *)&boot_params, ULONG_MAX); 506c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 50736bdd0a7SArvind Sankar efi_err("Failed to allocate lowmem for boot params\n"); 5083b8f44fcSArd Biesheuvel efi_exit(handle, status); 509c2d0b470SArd Biesheuvel } 510c2d0b470SArd Biesheuvel 511019512f1SArvind Sankar memset(boot_params, 0x0, sizeof(struct boot_params)); 512c2d0b470SArd Biesheuvel 513c2d0b470SArd Biesheuvel hdr = &boot_params->hdr; 514c2d0b470SArd Biesheuvel 51559476f80SArvind Sankar /* Copy the setup header from the second sector to boot_params */ 51659476f80SArvind Sankar memcpy(&hdr->jump, image_base + 512, 51759476f80SArvind Sankar sizeof(struct setup_header) - offsetof(struct setup_header, jump)); 518c2d0b470SArd Biesheuvel 519c2d0b470SArd Biesheuvel /* 520c2d0b470SArd Biesheuvel * Fill out some of the header fields ourselves because the 521c2d0b470SArd Biesheuvel * EFI firmware loader doesn't load the first sector. 522c2d0b470SArd Biesheuvel */ 523c2d0b470SArd Biesheuvel hdr->root_flags = 1; 524c2d0b470SArd Biesheuvel hdr->vid_mode = 0xffff; 525c2d0b470SArd Biesheuvel hdr->boot_flag = 0xAA55; 526c2d0b470SArd Biesheuvel 527c2d0b470SArd Biesheuvel hdr->type_of_loader = 0x21; 528c2d0b470SArd Biesheuvel 529c2d0b470SArd Biesheuvel /* Convert unicode cmdline to ascii */ 53027cd5511SArd Biesheuvel cmdline_ptr = efi_convert_cmdline(image, &options_size); 531c2d0b470SArd Biesheuvel if (!cmdline_ptr) 532c2d0b470SArd Biesheuvel goto fail; 533c2d0b470SArd Biesheuvel 534eed4e019SArvind Sankar efi_set_u64_split((unsigned long)cmdline_ptr, 535eed4e019SArvind Sankar &hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr); 536c2d0b470SArd Biesheuvel 537c2d0b470SArd Biesheuvel hdr->ramdisk_image = 0; 538c2d0b470SArd Biesheuvel hdr->ramdisk_size = 0; 539c2d0b470SArd Biesheuvel 54063bf28ceSArd Biesheuvel /* 54163bf28ceSArd Biesheuvel * Disregard any setup data that was provided by the bootloader: 54263bf28ceSArd Biesheuvel * setup_data could be pointing anywhere, and we have no way of 54363bf28ceSArd Biesheuvel * authenticating or validating the payload. 54463bf28ceSArd Biesheuvel */ 54563bf28ceSArd Biesheuvel hdr->setup_data = 0; 54663bf28ceSArd Biesheuvel 547ccc27ae7SArd Biesheuvel efi_stub_entry(handle, sys_table_arg, boot_params); 548c2d0b470SArd Biesheuvel /* not reached */ 549c2d0b470SArd Biesheuvel 550c2d0b470SArd Biesheuvel fail: 551019512f1SArvind Sankar efi_free(sizeof(struct boot_params), (unsigned long)boot_params); 552c2d0b470SArd Biesheuvel 5533b8f44fcSArd Biesheuvel efi_exit(handle, status); 554c2d0b470SArd Biesheuvel } 555c2d0b470SArd Biesheuvel 556c2d0b470SArd Biesheuvel static void add_e820ext(struct boot_params *params, 557c2d0b470SArd Biesheuvel struct setup_data *e820ext, u32 nr_entries) 558c2d0b470SArd Biesheuvel { 559c2d0b470SArd Biesheuvel struct setup_data *data; 560c2d0b470SArd Biesheuvel 561c2d0b470SArd Biesheuvel e820ext->type = SETUP_E820_EXT; 562c2d0b470SArd Biesheuvel e820ext->len = nr_entries * sizeof(struct boot_e820_entry); 563c2d0b470SArd Biesheuvel e820ext->next = 0; 564c2d0b470SArd Biesheuvel 565c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)params->hdr.setup_data; 566c2d0b470SArd Biesheuvel 567c2d0b470SArd Biesheuvel while (data && data->next) 568c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 569c2d0b470SArd Biesheuvel 570c2d0b470SArd Biesheuvel if (data) 571c2d0b470SArd Biesheuvel data->next = (unsigned long)e820ext; 572c2d0b470SArd Biesheuvel else 573c2d0b470SArd Biesheuvel params->hdr.setup_data = (unsigned long)e820ext; 574c2d0b470SArd Biesheuvel } 575c2d0b470SArd Biesheuvel 576c2d0b470SArd Biesheuvel static efi_status_t 577c2d0b470SArd Biesheuvel setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) 578c2d0b470SArd Biesheuvel { 579c2d0b470SArd Biesheuvel struct boot_e820_entry *entry = params->e820_table; 580c2d0b470SArd Biesheuvel struct efi_info *efi = ¶ms->efi_info; 581c2d0b470SArd Biesheuvel struct boot_e820_entry *prev = NULL; 582c2d0b470SArd Biesheuvel u32 nr_entries; 583c2d0b470SArd Biesheuvel u32 nr_desc; 584c2d0b470SArd Biesheuvel int i; 585c2d0b470SArd Biesheuvel 586c2d0b470SArd Biesheuvel nr_entries = 0; 587c2d0b470SArd Biesheuvel nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; 588c2d0b470SArd Biesheuvel 589c2d0b470SArd Biesheuvel for (i = 0; i < nr_desc; i++) { 590c2d0b470SArd Biesheuvel efi_memory_desc_t *d; 591c2d0b470SArd Biesheuvel unsigned int e820_type = 0; 592c2d0b470SArd Biesheuvel unsigned long m = efi->efi_memmap; 593c2d0b470SArd Biesheuvel 594c2d0b470SArd Biesheuvel #ifdef CONFIG_X86_64 595c2d0b470SArd Biesheuvel m |= (u64)efi->efi_memmap_hi << 32; 596c2d0b470SArd Biesheuvel #endif 597c2d0b470SArd Biesheuvel 598c2d0b470SArd Biesheuvel d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); 599c2d0b470SArd Biesheuvel switch (d->type) { 600c2d0b470SArd Biesheuvel case EFI_RESERVED_TYPE: 601c2d0b470SArd Biesheuvel case EFI_RUNTIME_SERVICES_CODE: 602c2d0b470SArd Biesheuvel case EFI_RUNTIME_SERVICES_DATA: 603c2d0b470SArd Biesheuvel case EFI_MEMORY_MAPPED_IO: 604c2d0b470SArd Biesheuvel case EFI_MEMORY_MAPPED_IO_PORT_SPACE: 605c2d0b470SArd Biesheuvel case EFI_PAL_CODE: 606c2d0b470SArd Biesheuvel e820_type = E820_TYPE_RESERVED; 607c2d0b470SArd Biesheuvel break; 608c2d0b470SArd Biesheuvel 609c2d0b470SArd Biesheuvel case EFI_UNUSABLE_MEMORY: 610c2d0b470SArd Biesheuvel e820_type = E820_TYPE_UNUSABLE; 611c2d0b470SArd Biesheuvel break; 612c2d0b470SArd Biesheuvel 613c2d0b470SArd Biesheuvel case EFI_ACPI_RECLAIM_MEMORY: 614c2d0b470SArd Biesheuvel e820_type = E820_TYPE_ACPI; 615c2d0b470SArd Biesheuvel break; 616c2d0b470SArd Biesheuvel 617c2d0b470SArd Biesheuvel case EFI_LOADER_CODE: 618c2d0b470SArd Biesheuvel case EFI_LOADER_DATA: 619c2d0b470SArd Biesheuvel case EFI_BOOT_SERVICES_CODE: 620c2d0b470SArd Biesheuvel case EFI_BOOT_SERVICES_DATA: 621c2d0b470SArd Biesheuvel case EFI_CONVENTIONAL_MEMORY: 622c2d0b470SArd Biesheuvel if (efi_soft_reserve_enabled() && 623c2d0b470SArd Biesheuvel (d->attribute & EFI_MEMORY_SP)) 624c2d0b470SArd Biesheuvel e820_type = E820_TYPE_SOFT_RESERVED; 625c2d0b470SArd Biesheuvel else 626c2d0b470SArd Biesheuvel e820_type = E820_TYPE_RAM; 627c2d0b470SArd Biesheuvel break; 628c2d0b470SArd Biesheuvel 629c2d0b470SArd Biesheuvel case EFI_ACPI_MEMORY_NVS: 630c2d0b470SArd Biesheuvel e820_type = E820_TYPE_NVS; 631c2d0b470SArd Biesheuvel break; 632c2d0b470SArd Biesheuvel 633c2d0b470SArd Biesheuvel case EFI_PERSISTENT_MEMORY: 634c2d0b470SArd Biesheuvel e820_type = E820_TYPE_PMEM; 635c2d0b470SArd Biesheuvel break; 636c2d0b470SArd Biesheuvel 637745e3ed8SKirill A. Shutemov case EFI_UNACCEPTED_MEMORY: 638745e3ed8SKirill A. Shutemov if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) { 639745e3ed8SKirill A. Shutemov efi_warn_once( 640745e3ed8SKirill A. Shutemov "The system has unaccepted memory, but kernel does not support it\nConsider enabling CONFIG_UNACCEPTED_MEMORY\n"); 641745e3ed8SKirill A. Shutemov continue; 642745e3ed8SKirill A. Shutemov } 643745e3ed8SKirill A. Shutemov e820_type = E820_TYPE_RAM; 644745e3ed8SKirill A. Shutemov process_unaccepted_memory(d->phys_addr, 645745e3ed8SKirill A. Shutemov d->phys_addr + PAGE_SIZE * d->num_pages); 646745e3ed8SKirill A. Shutemov break; 647c2d0b470SArd Biesheuvel default: 648c2d0b470SArd Biesheuvel continue; 649c2d0b470SArd Biesheuvel } 650c2d0b470SArd Biesheuvel 651c2d0b470SArd Biesheuvel /* Merge adjacent mappings */ 652c2d0b470SArd Biesheuvel if (prev && prev->type == e820_type && 653c2d0b470SArd Biesheuvel (prev->addr + prev->size) == d->phys_addr) { 654c2d0b470SArd Biesheuvel prev->size += d->num_pages << 12; 655c2d0b470SArd Biesheuvel continue; 656c2d0b470SArd Biesheuvel } 657c2d0b470SArd Biesheuvel 658c2d0b470SArd Biesheuvel if (nr_entries == ARRAY_SIZE(params->e820_table)) { 659c2d0b470SArd Biesheuvel u32 need = (nr_desc - i) * sizeof(struct e820_entry) + 660c2d0b470SArd Biesheuvel sizeof(struct setup_data); 661c2d0b470SArd Biesheuvel 662c2d0b470SArd Biesheuvel if (!e820ext || e820ext_size < need) 663c2d0b470SArd Biesheuvel return EFI_BUFFER_TOO_SMALL; 664c2d0b470SArd Biesheuvel 665c2d0b470SArd Biesheuvel /* boot_params map full, switch to e820 extended */ 666c2d0b470SArd Biesheuvel entry = (struct boot_e820_entry *)e820ext->data; 667c2d0b470SArd Biesheuvel } 668c2d0b470SArd Biesheuvel 669c2d0b470SArd Biesheuvel entry->addr = d->phys_addr; 670c2d0b470SArd Biesheuvel entry->size = d->num_pages << PAGE_SHIFT; 671c2d0b470SArd Biesheuvel entry->type = e820_type; 672c2d0b470SArd Biesheuvel prev = entry++; 673c2d0b470SArd Biesheuvel nr_entries++; 674c2d0b470SArd Biesheuvel } 675c2d0b470SArd Biesheuvel 676c2d0b470SArd Biesheuvel if (nr_entries > ARRAY_SIZE(params->e820_table)) { 677c2d0b470SArd Biesheuvel u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); 678c2d0b470SArd Biesheuvel 679c2d0b470SArd Biesheuvel add_e820ext(params, e820ext, nr_e820ext); 680c2d0b470SArd Biesheuvel nr_entries -= nr_e820ext; 681c2d0b470SArd Biesheuvel } 682c2d0b470SArd Biesheuvel 683c2d0b470SArd Biesheuvel params->e820_entries = (u8)nr_entries; 684c2d0b470SArd Biesheuvel 685c2d0b470SArd Biesheuvel return EFI_SUCCESS; 686c2d0b470SArd Biesheuvel } 687c2d0b470SArd Biesheuvel 688c2d0b470SArd Biesheuvel static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, 689c2d0b470SArd Biesheuvel u32 *e820ext_size) 690c2d0b470SArd Biesheuvel { 691c2d0b470SArd Biesheuvel efi_status_t status; 692c2d0b470SArd Biesheuvel unsigned long size; 693c2d0b470SArd Biesheuvel 694c2d0b470SArd Biesheuvel size = sizeof(struct setup_data) + 695c2d0b470SArd Biesheuvel sizeof(struct e820_entry) * nr_desc; 696c2d0b470SArd Biesheuvel 697c2d0b470SArd Biesheuvel if (*e820ext) { 698c2d0b470SArd Biesheuvel efi_bs_call(free_pool, *e820ext); 699c2d0b470SArd Biesheuvel *e820ext = NULL; 700c2d0b470SArd Biesheuvel *e820ext_size = 0; 701c2d0b470SArd Biesheuvel } 702c2d0b470SArd Biesheuvel 703c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 704c2d0b470SArd Biesheuvel (void **)e820ext); 705c2d0b470SArd Biesheuvel if (status == EFI_SUCCESS) 706c2d0b470SArd Biesheuvel *e820ext_size = size; 707c2d0b470SArd Biesheuvel 708c2d0b470SArd Biesheuvel return status; 709c2d0b470SArd Biesheuvel } 710c2d0b470SArd Biesheuvel 711c2d0b470SArd Biesheuvel static efi_status_t allocate_e820(struct boot_params *params, 712c2d0b470SArd Biesheuvel struct setup_data **e820ext, 713c2d0b470SArd Biesheuvel u32 *e820ext_size) 714c2d0b470SArd Biesheuvel { 7152e9f46eeSKirill A. Shutemov struct efi_boot_memmap *map; 716c2d0b470SArd Biesheuvel efi_status_t status; 7172e9f46eeSKirill A. Shutemov __u32 nr_desc; 718c2d0b470SArd Biesheuvel 7192e9f46eeSKirill A. Shutemov status = efi_get_memory_map(&map, false); 720c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 721c2d0b470SArd Biesheuvel return status; 7222e9f46eeSKirill A. Shutemov 7232e9f46eeSKirill A. Shutemov nr_desc = map->map_size / map->desc_size; 7242e9f46eeSKirill A. Shutemov if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) { 7252e9f46eeSKirill A. Shutemov u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) + 7262e9f46eeSKirill A. Shutemov EFI_MMAP_NR_SLACK_SLOTS; 7272e9f46eeSKirill A. Shutemov 7282e9f46eeSKirill A. Shutemov status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); 729c2d0b470SArd Biesheuvel } 730c2d0b470SArd Biesheuvel 731745e3ed8SKirill A. Shutemov if (IS_ENABLED(CONFIG_UNACCEPTED_MEMORY) && status == EFI_SUCCESS) 732745e3ed8SKirill A. Shutemov status = allocate_unaccepted_bitmap(nr_desc, map); 733745e3ed8SKirill A. Shutemov 7342e9f46eeSKirill A. Shutemov efi_bs_call(free_pool, map); 7352e9f46eeSKirill A. Shutemov return status; 736c2d0b470SArd Biesheuvel } 737c2d0b470SArd Biesheuvel 738c2d0b470SArd Biesheuvel struct exit_boot_struct { 739c2d0b470SArd Biesheuvel struct boot_params *boot_params; 740c2d0b470SArd Biesheuvel struct efi_info *efi; 741c2d0b470SArd Biesheuvel }; 742c2d0b470SArd Biesheuvel 743c2d0b470SArd Biesheuvel static efi_status_t exit_boot_func(struct efi_boot_memmap *map, 744c2d0b470SArd Biesheuvel void *priv) 745c2d0b470SArd Biesheuvel { 746c2d0b470SArd Biesheuvel const char *signature; 747c2d0b470SArd Biesheuvel struct exit_boot_struct *p = priv; 748c2d0b470SArd Biesheuvel 749c2d0b470SArd Biesheuvel signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE 750c2d0b470SArd Biesheuvel : EFI32_LOADER_SIGNATURE; 751c2d0b470SArd Biesheuvel memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); 752c2d0b470SArd Biesheuvel 753eed4e019SArvind Sankar efi_set_u64_split((unsigned long)efi_system_table, 754eed4e019SArvind Sankar &p->efi->efi_systab, &p->efi->efi_systab_hi); 755eab31265SArd Biesheuvel p->efi->efi_memdesc_size = map->desc_size; 756eab31265SArd Biesheuvel p->efi->efi_memdesc_version = map->desc_ver; 757eab31265SArd Biesheuvel efi_set_u64_split((unsigned long)map->map, 758eed4e019SArvind Sankar &p->efi->efi_memmap, &p->efi->efi_memmap_hi); 759eab31265SArd Biesheuvel p->efi->efi_memmap_size = map->map_size; 760c2d0b470SArd Biesheuvel 761c2d0b470SArd Biesheuvel return EFI_SUCCESS; 762c2d0b470SArd Biesheuvel } 763c2d0b470SArd Biesheuvel 764c2d0b470SArd Biesheuvel static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) 765c2d0b470SArd Biesheuvel { 766c2d0b470SArd Biesheuvel struct setup_data *e820ext = NULL; 767c2d0b470SArd Biesheuvel __u32 e820ext_size = 0; 768c2d0b470SArd Biesheuvel efi_status_t status; 769c2d0b470SArd Biesheuvel struct exit_boot_struct priv; 770c2d0b470SArd Biesheuvel 771c2d0b470SArd Biesheuvel priv.boot_params = boot_params; 772c2d0b470SArd Biesheuvel priv.efi = &boot_params->efi_info; 773c2d0b470SArd Biesheuvel 774c2d0b470SArd Biesheuvel status = allocate_e820(boot_params, &e820ext, &e820ext_size); 775c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 776c2d0b470SArd Biesheuvel return status; 777c2d0b470SArd Biesheuvel 778c2d0b470SArd Biesheuvel /* Might as well exit boot services now */ 779eab31265SArd Biesheuvel status = efi_exit_boot_services(handle, &priv, exit_boot_func); 780c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 781c2d0b470SArd Biesheuvel return status; 782c2d0b470SArd Biesheuvel 783c2d0b470SArd Biesheuvel /* Historic? */ 784c2d0b470SArd Biesheuvel boot_params->alt_mem_k = 32 * 1024; 785c2d0b470SArd Biesheuvel 786c2d0b470SArd Biesheuvel status = setup_e820(boot_params, e820ext, e820ext_size); 787c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 788c2d0b470SArd Biesheuvel return status; 789c2d0b470SArd Biesheuvel 790c2d0b470SArd Biesheuvel return EFI_SUCCESS; 791c2d0b470SArd Biesheuvel } 792c2d0b470SArd Biesheuvel 793d2d7a54fSArd Biesheuvel static void __noreturn enter_kernel(unsigned long kernel_addr, 794d2d7a54fSArd Biesheuvel struct boot_params *boot_params) 795d2d7a54fSArd Biesheuvel { 796d2d7a54fSArd Biesheuvel /* enter decompressed kernel with boot_params pointer in RSI/ESI */ 797d2d7a54fSArd Biesheuvel asm("jmp *%0"::"r"(kernel_addr), "S"(boot_params)); 798d2d7a54fSArd Biesheuvel 799d2d7a54fSArd Biesheuvel unreachable(); 800d2d7a54fSArd Biesheuvel } 801d2d7a54fSArd Biesheuvel 802c2d0b470SArd Biesheuvel /* 803d2d7a54fSArd Biesheuvel * On success, this routine will jump to the relocated image directly and never 804d2d7a54fSArd Biesheuvel * return. On failure, it will exit to the firmware via efi_exit() instead of 805d2d7a54fSArd Biesheuvel * returning. 806c2d0b470SArd Biesheuvel */ 807df9215f1SArd Biesheuvel void __noreturn efi_stub_entry(efi_handle_t handle, 808c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg, 809c2d0b470SArd Biesheuvel struct boot_params *boot_params) 810c2d0b470SArd Biesheuvel { 811*11078876SArd Biesheuvel efi_guid_t guid = EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID; 812c2d0b470SArd Biesheuvel unsigned long bzimage_addr = (unsigned long)startup_32; 813d5cdf4cfSArvind Sankar unsigned long buffer_start, buffer_end; 814c2d0b470SArd Biesheuvel struct setup_header *hdr = &boot_params->hdr; 815f4dc7fffSArd Biesheuvel const struct linux_efi_initrd *initrd = NULL; 816c2d0b470SArd Biesheuvel efi_status_t status; 817c2d0b470SArd Biesheuvel 818ccc27ae7SArd Biesheuvel efi_system_table = sys_table_arg; 819c2d0b470SArd Biesheuvel /* Check if we were booted by the EFI firmware */ 820ccc27ae7SArd Biesheuvel if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 8213b8f44fcSArd Biesheuvel efi_exit(handle, EFI_INVALID_PARAMETER); 822c2d0b470SArd Biesheuvel 823*11078876SArd Biesheuvel if (IS_ENABLED(CONFIG_EFI_DXE_MEM_ATTRIBUTES)) { 8243ba75c13SBaskov Evgeniy efi_dxe_table = get_efi_config_table(EFI_DXE_SERVICES_TABLE_GUID); 8253ba75c13SBaskov Evgeniy if (efi_dxe_table && 8263ba75c13SBaskov Evgeniy efi_dxe_table->hdr.signature != EFI_DXE_SERVICES_TABLE_SIGNATURE) { 8273ba75c13SBaskov Evgeniy efi_warn("Ignoring DXE services table: invalid signature\n"); 8283ba75c13SBaskov Evgeniy efi_dxe_table = NULL; 8293ba75c13SBaskov Evgeniy } 830*11078876SArd Biesheuvel } 831*11078876SArd Biesheuvel 832*11078876SArd Biesheuvel /* grab the memory attributes protocol if it exists */ 833*11078876SArd Biesheuvel efi_bs_call(locate_protocol, &guid, NULL, (void **)&memattr); 8343ba75c13SBaskov Evgeniy 835cb1c9e02SArd Biesheuvel status = efi_setup_5level_paging(); 836cb1c9e02SArd Biesheuvel if (status != EFI_SUCCESS) { 837cb1c9e02SArd Biesheuvel efi_err("efi_setup_5level_paging() failed!\n"); 838cb1c9e02SArd Biesheuvel goto fail; 839cb1c9e02SArd Biesheuvel } 840cb1c9e02SArd Biesheuvel 841c2d0b470SArd Biesheuvel /* 842d5cdf4cfSArvind Sankar * If the kernel isn't already loaded at a suitable address, 843d5cdf4cfSArvind Sankar * relocate it. 844d5cdf4cfSArvind Sankar * 845d5cdf4cfSArvind Sankar * It must be loaded above LOAD_PHYSICAL_ADDR. 846d5cdf4cfSArvind Sankar * 847d5cdf4cfSArvind Sankar * The maximum address for 64-bit is 1 << 46 for 4-level paging. This 848d5cdf4cfSArvind Sankar * is defined as the macro MAXMEM, but unfortunately that is not a 849d5cdf4cfSArvind Sankar * compile-time constant if 5-level paging is configured, so we instead 850d5cdf4cfSArvind Sankar * define our own macro for use here. 851d5cdf4cfSArvind Sankar * 852d5cdf4cfSArvind Sankar * For 32-bit, the maximum address is complicated to figure out, for 853d5cdf4cfSArvind Sankar * now use KERNEL_IMAGE_SIZE, which will be 512MiB, the same as what 854d5cdf4cfSArvind Sankar * KASLR uses. 855d5cdf4cfSArvind Sankar * 85621cb9b41SArvind Sankar * Also relocate it if image_offset is zero, i.e. the kernel wasn't 85721cb9b41SArvind Sankar * loaded by LoadImage, but rather by a bootloader that called the 85821cb9b41SArvind Sankar * handover entry. The reason we must always relocate in this case is 85921cb9b41SArvind Sankar * to handle the case of systemd-boot booting a unified kernel image, 86021cb9b41SArvind Sankar * which is a PE executable that contains the bzImage and an initrd as 86121cb9b41SArvind Sankar * COFF sections. The initrd section is placed after the bzImage 86221cb9b41SArvind Sankar * without ensuring that there are at least init_size bytes available 86321cb9b41SArvind Sankar * for the bzImage, and thus the compressed kernel's startup code may 86421cb9b41SArvind Sankar * overwrite the initrd unless it is moved out of the way. 865c2d0b470SArd Biesheuvel */ 866d5cdf4cfSArvind Sankar 867d5cdf4cfSArvind Sankar buffer_start = ALIGN(bzimage_addr - image_offset, 868d5cdf4cfSArvind Sankar hdr->kernel_alignment); 869d5cdf4cfSArvind Sankar buffer_end = buffer_start + hdr->init_size; 870d5cdf4cfSArvind Sankar 871d5cdf4cfSArvind Sankar if ((buffer_start < LOAD_PHYSICAL_ADDR) || 872d5cdf4cfSArvind Sankar (IS_ENABLED(CONFIG_X86_32) && buffer_end > KERNEL_IMAGE_SIZE) || 873d5cdf4cfSArvind Sankar (IS_ENABLED(CONFIG_X86_64) && buffer_end > MAXMEM_X86_64_4LEVEL) || 87421cb9b41SArvind Sankar (image_offset == 0)) { 875688eb282SArvind Sankar extern char _bss[]; 876688eb282SArvind Sankar 877c2d0b470SArd Biesheuvel status = efi_relocate_kernel(&bzimage_addr, 878688eb282SArvind Sankar (unsigned long)_bss - bzimage_addr, 879688eb282SArvind Sankar hdr->init_size, 880c2d0b470SArd Biesheuvel hdr->pref_address, 881c2d0b470SArd Biesheuvel hdr->kernel_alignment, 882c2d0b470SArd Biesheuvel LOAD_PHYSICAL_ADDR); 883c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 88436bdd0a7SArvind Sankar efi_err("efi_relocate_kernel() failed!\n"); 885c2d0b470SArd Biesheuvel goto fail; 886c2d0b470SArd Biesheuvel } 8871887c9b6SArvind Sankar /* 8881887c9b6SArvind Sankar * Now that we've copied the kernel elsewhere, we no longer 8891887c9b6SArvind Sankar * have a set up block before startup_32(), so reset image_offset 8901887c9b6SArvind Sankar * to zero in case it was set earlier. 8911887c9b6SArvind Sankar */ 8921887c9b6SArvind Sankar image_offset = 0; 893c2d0b470SArd Biesheuvel } 894c2d0b470SArd Biesheuvel 8957dde67f2SArvind Sankar #ifdef CONFIG_CMDLINE_BOOL 896055042beSArvind Sankar status = efi_parse_options(CONFIG_CMDLINE); 897055042beSArvind Sankar if (status != EFI_SUCCESS) { 898055042beSArvind Sankar efi_err("Failed to parse options\n"); 899055042beSArvind Sankar goto fail; 900055042beSArvind Sankar } 9017dde67f2SArvind Sankar #endif 9027dde67f2SArvind Sankar if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { 9037dde67f2SArvind Sankar unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr | 904c2d0b470SArd Biesheuvel ((u64)boot_params->ext_cmd_line_ptr << 32)); 905055042beSArvind Sankar status = efi_parse_options((char *)cmdline_paddr); 906055042beSArvind Sankar if (status != EFI_SUCCESS) { 907055042beSArvind Sankar efi_err("Failed to parse options\n"); 908055042beSArvind Sankar goto fail; 909055042beSArvind Sankar } 9107dde67f2SArvind Sankar } 911c2d0b470SArd Biesheuvel 912c2d0b470SArd Biesheuvel /* 913987053a3SArvind Sankar * At this point, an initrd may already have been loaded by the 914987053a3SArvind Sankar * bootloader and passed via bootparams. We permit an initrd loaded 915987053a3SArvind Sankar * from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it. 916987053a3SArvind Sankar * 917987053a3SArvind Sankar * If the device path is not present, any command-line initrd= 918987053a3SArvind Sankar * arguments will be processed only if image is not NULL, which will be 919987053a3SArvind Sankar * the case only if we were loaded via the PE entry point. 920ec93fc37SArd Biesheuvel */ 921f4dc7fffSArd Biesheuvel status = efi_load_initrd(image, hdr->initrd_addr_max, ULONG_MAX, 922f4dc7fffSArd Biesheuvel &initrd); 92320287d56SArd Biesheuvel if (status != EFI_SUCCESS) 924ec93fc37SArd Biesheuvel goto fail; 925f4dc7fffSArd Biesheuvel if (initrd && initrd->size > 0) { 926f4dc7fffSArd Biesheuvel efi_set_u64_split(initrd->base, &hdr->ramdisk_image, 927eed4e019SArvind Sankar &boot_params->ext_ramdisk_image); 928f4dc7fffSArd Biesheuvel efi_set_u64_split(initrd->size, &hdr->ramdisk_size, 929eed4e019SArvind Sankar &boot_params->ext_ramdisk_size); 93079d3219dSArd Biesheuvel } 931ec93fc37SArd Biesheuvel 932f4dc7fffSArd Biesheuvel 933ec93fc37SArd Biesheuvel /* 934c2d0b470SArd Biesheuvel * If the boot loader gave us a value for secure_boot then we use that, 935c2d0b470SArd Biesheuvel * otherwise we ask the BIOS. 936c2d0b470SArd Biesheuvel */ 937c2d0b470SArd Biesheuvel if (boot_params->secure_boot == efi_secureboot_mode_unset) 938c2d0b470SArd Biesheuvel boot_params->secure_boot = efi_get_secureboot(); 939c2d0b470SArd Biesheuvel 940c2d0b470SArd Biesheuvel /* Ask the firmware to clear memory on unclean shutdown */ 941c2d0b470SArd Biesheuvel efi_enable_reset_attack_mitigation(); 942c2d0b470SArd Biesheuvel 943c2d0b470SArd Biesheuvel efi_random_get_seed(); 944c2d0b470SArd Biesheuvel 945c2d0b470SArd Biesheuvel efi_retrieve_tpm2_eventlog(); 946c2d0b470SArd Biesheuvel 947c2d0b470SArd Biesheuvel setup_graphics(boot_params); 948c2d0b470SArd Biesheuvel 949c2d0b470SArd Biesheuvel setup_efi_pci(boot_params); 950c2d0b470SArd Biesheuvel 95182e0d6d7SBaskov Evgeniy setup_quirks(boot_params, bzimage_addr, buffer_end - buffer_start); 952c2d0b470SArd Biesheuvel 953c0461bd1SDionna Glaze setup_unaccepted_memory(); 954c0461bd1SDionna Glaze 955c2d0b470SArd Biesheuvel status = exit_boot(boot_params, handle); 956c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 95736bdd0a7SArvind Sankar efi_err("exit_boot() failed!\n"); 958c2d0b470SArd Biesheuvel goto fail; 959c2d0b470SArd Biesheuvel } 960c2d0b470SArd Biesheuvel 961cb1c9e02SArd Biesheuvel efi_5level_switch(); 962cb1c9e02SArd Biesheuvel 963d2d7a54fSArd Biesheuvel if (IS_ENABLED(CONFIG_X86_64)) 964d2d7a54fSArd Biesheuvel bzimage_addr += startup_64 - startup_32; 965d2d7a54fSArd Biesheuvel 966d2d7a54fSArd Biesheuvel enter_kernel(bzimage_addr, boot_params); 967c2d0b470SArd Biesheuvel fail: 968df9215f1SArd Biesheuvel efi_err("efi_stub_entry() failed!\n"); 969c2d0b470SArd Biesheuvel 9703b8f44fcSArd Biesheuvel efi_exit(handle, status); 971c2d0b470SArd Biesheuvel } 972df9215f1SArd Biesheuvel 973df9215f1SArd Biesheuvel #ifdef CONFIG_EFI_HANDOVER_PROTOCOL 974d7156b98SArd Biesheuvel void efi_handover_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 975d7156b98SArd Biesheuvel struct boot_params *boot_params) 976d7156b98SArd Biesheuvel { 977d7156b98SArd Biesheuvel extern char _bss[], _ebss[]; 978d7156b98SArd Biesheuvel 979d7156b98SArd Biesheuvel memset(_bss, 0, _ebss - _bss); 980d7156b98SArd Biesheuvel efi_stub_entry(handle, sys_table_arg, boot_params); 981d7156b98SArd Biesheuvel } 982d7156b98SArd Biesheuvel 983df9215f1SArd Biesheuvel #ifndef CONFIG_EFI_MIXED 984d7156b98SArd Biesheuvel extern __alias(efi_handover_entry) 985df9215f1SArd Biesheuvel void efi32_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 986df9215f1SArd Biesheuvel struct boot_params *boot_params); 987df9215f1SArd Biesheuvel 988d7156b98SArd Biesheuvel extern __alias(efi_handover_entry) 989df9215f1SArd Biesheuvel void efi64_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 990df9215f1SArd Biesheuvel struct boot_params *boot_params); 991df9215f1SArd Biesheuvel #endif 992df9215f1SArd Biesheuvel #endif 993