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> 18*31c77a50SArd Biesheuvel #include <asm/sev.h> 19c2d0b470SArd Biesheuvel 20c2d0b470SArd Biesheuvel #include "efistub.h" 21cb1c9e02SArd Biesheuvel #include "x86-stub.h" 22c2d0b470SArd Biesheuvel 23d5cdf4cfSArvind Sankar /* Maximum physical address for 64-bit kernel with 4-level paging */ 24d5cdf4cfSArvind Sankar #define MAXMEM_X86_64_4LEVEL (1ull << 46) 25d5cdf4cfSArvind Sankar 26ccc27ae7SArd Biesheuvel const efi_system_table_t *efi_system_table; 273ba75c13SBaskov Evgeniy const efi_dxe_services_table_t *efi_dxe_table; 284b520162SArd Biesheuvel u32 image_offset __section(".data"); 29987053a3SArvind Sankar static efi_loaded_image_t *image = NULL; 3011078876SArd Biesheuvel static efi_memory_attribute_protocol_t *memattr; 31c2d0b470SArd Biesheuvel 32c0461bd1SDionna Glaze typedef union sev_memory_acceptance_protocol sev_memory_acceptance_protocol_t; 33c0461bd1SDionna Glaze union sev_memory_acceptance_protocol { 34c0461bd1SDionna Glaze struct { 35c0461bd1SDionna Glaze efi_status_t (__efiapi * allow_unaccepted_memory)( 36c0461bd1SDionna Glaze sev_memory_acceptance_protocol_t *); 37c0461bd1SDionna Glaze }; 38c0461bd1SDionna Glaze struct { 39c0461bd1SDionna Glaze u32 allow_unaccepted_memory; 40c0461bd1SDionna Glaze } mixed_mode; 41c0461bd1SDionna Glaze }; 42c0461bd1SDionna Glaze 43c2d0b470SArd Biesheuvel static efi_status_t 44c2d0b470SArd Biesheuvel preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) 45c2d0b470SArd Biesheuvel { 46c2d0b470SArd Biesheuvel struct pci_setup_rom *rom = NULL; 47c2d0b470SArd Biesheuvel efi_status_t status; 48c2d0b470SArd Biesheuvel unsigned long size; 49c2d0b470SArd Biesheuvel uint64_t romsize; 50c2d0b470SArd Biesheuvel void *romimage; 51c2d0b470SArd Biesheuvel 52c2d0b470SArd Biesheuvel /* 53c2d0b470SArd Biesheuvel * Some firmware images contain EFI function pointers at the place where 54c2d0b470SArd Biesheuvel * the romimage and romsize fields are supposed to be. Typically the EFI 55c2d0b470SArd Biesheuvel * code is mapped at high addresses, translating to an unrealistically 56c2d0b470SArd Biesheuvel * large romsize. The UEFI spec limits the size of option ROMs to 16 57c2d0b470SArd Biesheuvel * MiB so we reject any ROMs over 16 MiB in size to catch this. 58c2d0b470SArd Biesheuvel */ 59c2d0b470SArd Biesheuvel romimage = efi_table_attr(pci, romimage); 60c2d0b470SArd Biesheuvel romsize = efi_table_attr(pci, romsize); 61c2d0b470SArd Biesheuvel if (!romimage || !romsize || romsize > SZ_16M) 62c2d0b470SArd Biesheuvel return EFI_INVALID_PARAMETER; 63c2d0b470SArd Biesheuvel 64c2d0b470SArd Biesheuvel size = romsize + sizeof(*rom); 65c2d0b470SArd Biesheuvel 66c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 67c2d0b470SArd Biesheuvel (void **)&rom); 68c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 6936bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'rom'\n"); 70c2d0b470SArd Biesheuvel return status; 71c2d0b470SArd Biesheuvel } 72c2d0b470SArd Biesheuvel 73c2d0b470SArd Biesheuvel memset(rom, 0, sizeof(*rom)); 74c2d0b470SArd Biesheuvel 75c2d0b470SArd Biesheuvel rom->data.type = SETUP_PCI; 76c2d0b470SArd Biesheuvel rom->data.len = size - sizeof(struct setup_data); 77c2d0b470SArd Biesheuvel rom->data.next = 0; 78c2d0b470SArd Biesheuvel rom->pcilen = pci->romsize; 79c2d0b470SArd Biesheuvel *__rom = rom; 80c2d0b470SArd Biesheuvel 81c2d0b470SArd Biesheuvel status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, 82c2d0b470SArd Biesheuvel PCI_VENDOR_ID, 1, &rom->vendor); 83c2d0b470SArd Biesheuvel 84c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 8536bdd0a7SArvind Sankar efi_err("Failed to read rom->vendor\n"); 86c2d0b470SArd Biesheuvel goto free_struct; 87c2d0b470SArd Biesheuvel } 88c2d0b470SArd Biesheuvel 89c2d0b470SArd Biesheuvel status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, 90c2d0b470SArd Biesheuvel PCI_DEVICE_ID, 1, &rom->devid); 91c2d0b470SArd Biesheuvel 92c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 9336bdd0a7SArvind Sankar efi_err("Failed to read rom->devid\n"); 94c2d0b470SArd Biesheuvel goto free_struct; 95c2d0b470SArd Biesheuvel } 96c2d0b470SArd Biesheuvel 97c2d0b470SArd Biesheuvel status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, 98c2d0b470SArd Biesheuvel &rom->device, &rom->function); 99c2d0b470SArd Biesheuvel 100c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 101c2d0b470SArd Biesheuvel goto free_struct; 102c2d0b470SArd Biesheuvel 103c2d0b470SArd Biesheuvel memcpy(rom->romdata, romimage, romsize); 104c2d0b470SArd Biesheuvel return status; 105c2d0b470SArd Biesheuvel 106c2d0b470SArd Biesheuvel free_struct: 107c2d0b470SArd Biesheuvel efi_bs_call(free_pool, rom); 108c2d0b470SArd Biesheuvel return status; 109c2d0b470SArd Biesheuvel } 110c2d0b470SArd Biesheuvel 111c2d0b470SArd Biesheuvel /* 112c2d0b470SArd Biesheuvel * There's no way to return an informative status from this function, 113c2d0b470SArd Biesheuvel * because any analysis (and printing of error messages) needs to be 114c2d0b470SArd Biesheuvel * done directly at the EFI function call-site. 115c2d0b470SArd Biesheuvel * 116c2d0b470SArd Biesheuvel * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we 117c2d0b470SArd Biesheuvel * just didn't find any PCI devices, but there's no way to tell outside 118c2d0b470SArd Biesheuvel * the context of the call. 119c2d0b470SArd Biesheuvel */ 120c2d0b470SArd Biesheuvel static void setup_efi_pci(struct boot_params *params) 121c2d0b470SArd Biesheuvel { 122c2d0b470SArd Biesheuvel efi_status_t status; 123c2d0b470SArd Biesheuvel void **pci_handle = NULL; 124c2d0b470SArd Biesheuvel efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; 125c2d0b470SArd Biesheuvel unsigned long size = 0; 126c2d0b470SArd Biesheuvel struct setup_data *data; 127c2d0b470SArd Biesheuvel efi_handle_t h; 128c2d0b470SArd Biesheuvel int i; 129c2d0b470SArd Biesheuvel 130c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 131c2d0b470SArd Biesheuvel &pci_proto, NULL, &size, pci_handle); 132c2d0b470SArd Biesheuvel 133c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) { 134c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 135c2d0b470SArd Biesheuvel (void **)&pci_handle); 136c2d0b470SArd Biesheuvel 137c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 13836bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'pci_handle'\n"); 139c2d0b470SArd Biesheuvel return; 140c2d0b470SArd Biesheuvel } 141c2d0b470SArd Biesheuvel 142c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 143c2d0b470SArd Biesheuvel &pci_proto, NULL, &size, pci_handle); 144c2d0b470SArd Biesheuvel } 145c2d0b470SArd Biesheuvel 146c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 147c2d0b470SArd Biesheuvel goto free_handle; 148c2d0b470SArd Biesheuvel 149c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)params->hdr.setup_data; 150c2d0b470SArd Biesheuvel 151c2d0b470SArd Biesheuvel while (data && data->next) 152c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 153c2d0b470SArd Biesheuvel 154c2d0b470SArd Biesheuvel for_each_efi_handle(h, pci_handle, size, i) { 155c2d0b470SArd Biesheuvel efi_pci_io_protocol_t *pci = NULL; 156c2d0b470SArd Biesheuvel struct pci_setup_rom *rom; 157c2d0b470SArd Biesheuvel 158c2d0b470SArd Biesheuvel status = efi_bs_call(handle_protocol, h, &pci_proto, 159c2d0b470SArd Biesheuvel (void **)&pci); 160c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS || !pci) 161c2d0b470SArd Biesheuvel continue; 162c2d0b470SArd Biesheuvel 163c2d0b470SArd Biesheuvel status = preserve_pci_rom_image(pci, &rom); 164c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 165c2d0b470SArd Biesheuvel continue; 166c2d0b470SArd Biesheuvel 167c2d0b470SArd Biesheuvel if (data) 168c2d0b470SArd Biesheuvel data->next = (unsigned long)rom; 169c2d0b470SArd Biesheuvel else 170c2d0b470SArd Biesheuvel params->hdr.setup_data = (unsigned long)rom; 171c2d0b470SArd Biesheuvel 172c2d0b470SArd Biesheuvel data = (struct setup_data *)rom; 173c2d0b470SArd Biesheuvel } 174c2d0b470SArd Biesheuvel 175c2d0b470SArd Biesheuvel free_handle: 176c2d0b470SArd Biesheuvel efi_bs_call(free_pool, pci_handle); 177c2d0b470SArd Biesheuvel } 178c2d0b470SArd Biesheuvel 179c2d0b470SArd Biesheuvel static void retrieve_apple_device_properties(struct boot_params *boot_params) 180c2d0b470SArd Biesheuvel { 181c2d0b470SArd Biesheuvel efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; 182c2d0b470SArd Biesheuvel struct setup_data *data, *new; 183c2d0b470SArd Biesheuvel efi_status_t status; 184c2d0b470SArd Biesheuvel u32 size = 0; 185c2d0b470SArd Biesheuvel apple_properties_protocol_t *p; 186c2d0b470SArd Biesheuvel 187c2d0b470SArd Biesheuvel status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); 188c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 189c2d0b470SArd Biesheuvel return; 190c2d0b470SArd Biesheuvel 191c2d0b470SArd Biesheuvel if (efi_table_attr(p, version) != 0x10000) { 19236bdd0a7SArvind Sankar efi_err("Unsupported properties proto version\n"); 193c2d0b470SArd Biesheuvel return; 194c2d0b470SArd Biesheuvel } 195c2d0b470SArd Biesheuvel 196c2d0b470SArd Biesheuvel efi_call_proto(p, get_all, NULL, &size); 197c2d0b470SArd Biesheuvel if (!size) 198c2d0b470SArd Biesheuvel return; 199c2d0b470SArd Biesheuvel 200c2d0b470SArd Biesheuvel do { 201c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, 202c2d0b470SArd Biesheuvel size + sizeof(struct setup_data), 203c2d0b470SArd Biesheuvel (void **)&new); 204c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 20536bdd0a7SArvind Sankar efi_err("Failed to allocate memory for 'properties'\n"); 206c2d0b470SArd Biesheuvel return; 207c2d0b470SArd Biesheuvel } 208c2d0b470SArd Biesheuvel 209c2d0b470SArd Biesheuvel status = efi_call_proto(p, get_all, new->data, &size); 210c2d0b470SArd Biesheuvel 211c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 212c2d0b470SArd Biesheuvel efi_bs_call(free_pool, new); 213c2d0b470SArd Biesheuvel } while (status == EFI_BUFFER_TOO_SMALL); 214c2d0b470SArd Biesheuvel 215c2d0b470SArd Biesheuvel new->type = SETUP_APPLE_PROPERTIES; 216c2d0b470SArd Biesheuvel new->len = size; 217c2d0b470SArd Biesheuvel new->next = 0; 218c2d0b470SArd Biesheuvel 219c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; 220c2d0b470SArd Biesheuvel if (!data) { 221c2d0b470SArd Biesheuvel boot_params->hdr.setup_data = (unsigned long)new; 222c2d0b470SArd Biesheuvel } else { 223c2d0b470SArd Biesheuvel while (data->next) 224c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 225c2d0b470SArd Biesheuvel data->next = (unsigned long)new; 226c2d0b470SArd Biesheuvel } 227c2d0b470SArd Biesheuvel } 228c2d0b470SArd Biesheuvel 229cb1c9e02SArd Biesheuvel void efi_adjust_memory_range_protection(unsigned long start, 230cb1c9e02SArd Biesheuvel unsigned long size) 23182e0d6d7SBaskov Evgeniy { 23282e0d6d7SBaskov Evgeniy efi_status_t status; 23382e0d6d7SBaskov Evgeniy efi_gcd_memory_space_desc_t desc; 23482e0d6d7SBaskov Evgeniy unsigned long end, next; 23582e0d6d7SBaskov Evgeniy unsigned long rounded_start, rounded_end; 23682e0d6d7SBaskov Evgeniy unsigned long unprotect_start, unprotect_size; 23782e0d6d7SBaskov Evgeniy 23882e0d6d7SBaskov Evgeniy rounded_start = rounddown(start, EFI_PAGE_SIZE); 23982e0d6d7SBaskov Evgeniy rounded_end = roundup(start + size, EFI_PAGE_SIZE); 24082e0d6d7SBaskov Evgeniy 24111078876SArd Biesheuvel if (memattr != NULL) { 24211078876SArd Biesheuvel efi_call_proto(memattr, clear_memory_attributes, rounded_start, 24311078876SArd Biesheuvel rounded_end - rounded_start, EFI_MEMORY_XP); 24411078876SArd Biesheuvel return; 24511078876SArd Biesheuvel } 24611078876SArd Biesheuvel 24711078876SArd Biesheuvel if (efi_dxe_table == NULL) 24811078876SArd Biesheuvel return; 24911078876SArd Biesheuvel 25082e0d6d7SBaskov Evgeniy /* 25182e0d6d7SBaskov Evgeniy * Don't modify memory region attributes, they are 25282e0d6d7SBaskov Evgeniy * already suitable, to lower the possibility to 25382e0d6d7SBaskov Evgeniy * encounter firmware bugs. 25482e0d6d7SBaskov Evgeniy */ 25582e0d6d7SBaskov Evgeniy 25682e0d6d7SBaskov Evgeniy for (end = start + size; start < end; start = next) { 25782e0d6d7SBaskov Evgeniy 25882e0d6d7SBaskov Evgeniy status = efi_dxe_call(get_memory_space_descriptor, start, &desc); 25982e0d6d7SBaskov Evgeniy 26082e0d6d7SBaskov Evgeniy if (status != EFI_SUCCESS) 26182e0d6d7SBaskov Evgeniy return; 26282e0d6d7SBaskov Evgeniy 26382e0d6d7SBaskov Evgeniy next = desc.base_address + desc.length; 26482e0d6d7SBaskov Evgeniy 26582e0d6d7SBaskov Evgeniy /* 26682e0d6d7SBaskov Evgeniy * Only system memory is suitable for trampoline/kernel image placement, 26782e0d6d7SBaskov Evgeniy * so only this type of memory needs its attributes to be modified. 26882e0d6d7SBaskov Evgeniy */ 26982e0d6d7SBaskov Evgeniy 27082e0d6d7SBaskov Evgeniy if (desc.gcd_memory_type != EfiGcdMemoryTypeSystemMemory || 27182e0d6d7SBaskov Evgeniy (desc.attributes & (EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0) 27282e0d6d7SBaskov Evgeniy continue; 27382e0d6d7SBaskov Evgeniy 27482e0d6d7SBaskov Evgeniy unprotect_start = max(rounded_start, (unsigned long)desc.base_address); 27582e0d6d7SBaskov Evgeniy unprotect_size = min(rounded_end, next) - unprotect_start; 27682e0d6d7SBaskov Evgeniy 27782e0d6d7SBaskov Evgeniy status = efi_dxe_call(set_memory_space_attributes, 27882e0d6d7SBaskov Evgeniy unprotect_start, unprotect_size, 27982e0d6d7SBaskov Evgeniy EFI_MEMORY_WB); 28082e0d6d7SBaskov Evgeniy 28182e0d6d7SBaskov Evgeniy if (status != EFI_SUCCESS) { 28231f1a0edSArd Biesheuvel efi_warn("Unable to unprotect memory range [%08lx,%08lx]: %lx\n", 28382e0d6d7SBaskov Evgeniy unprotect_start, 28482e0d6d7SBaskov Evgeniy unprotect_start + unprotect_size, 28531f1a0edSArd Biesheuvel status); 28682e0d6d7SBaskov Evgeniy } 28782e0d6d7SBaskov Evgeniy } 28882e0d6d7SBaskov Evgeniy } 28982e0d6d7SBaskov Evgeniy 290d2d7a54fSArd Biesheuvel extern const u8 startup_32[], startup_64[]; 29182e0d6d7SBaskov Evgeniy 29282e0d6d7SBaskov Evgeniy static void 29382e0d6d7SBaskov Evgeniy setup_memory_protection(unsigned long image_base, unsigned long image_size) 29482e0d6d7SBaskov Evgeniy { 29582e0d6d7SBaskov Evgeniy #ifdef CONFIG_64BIT 29682e0d6d7SBaskov Evgeniy if (image_base != (unsigned long)startup_32) 297cb1c9e02SArd Biesheuvel efi_adjust_memory_range_protection(image_base, image_size); 29882e0d6d7SBaskov Evgeniy #else 29982e0d6d7SBaskov Evgeniy /* 30082e0d6d7SBaskov Evgeniy * Clear protection flags on a whole range of possible 30182e0d6d7SBaskov Evgeniy * addresses used for KASLR. We don't need to do that 30282e0d6d7SBaskov Evgeniy * on x86_64, since KASLR/extraction is performed after 30382e0d6d7SBaskov Evgeniy * dedicated identity page tables are built and we only 30482e0d6d7SBaskov Evgeniy * need to remove possible protection on relocated image 30582e0d6d7SBaskov Evgeniy * itself disregarding further relocations. 30682e0d6d7SBaskov Evgeniy */ 307cb1c9e02SArd Biesheuvel efi_adjust_memory_range_protection(LOAD_PHYSICAL_ADDR, 30882e0d6d7SBaskov Evgeniy KERNEL_IMAGE_SIZE - LOAD_PHYSICAL_ADDR); 30982e0d6d7SBaskov Evgeniy #endif 31082e0d6d7SBaskov Evgeniy } 31182e0d6d7SBaskov Evgeniy 312c0461bd1SDionna Glaze static void setup_unaccepted_memory(void) 313c0461bd1SDionna Glaze { 314c0461bd1SDionna Glaze efi_guid_t mem_acceptance_proto = OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID; 315c0461bd1SDionna Glaze sev_memory_acceptance_protocol_t *proto; 316c0461bd1SDionna Glaze efi_status_t status; 317c0461bd1SDionna Glaze 318c0461bd1SDionna Glaze if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) 319c0461bd1SDionna Glaze return; 320c0461bd1SDionna Glaze 321c0461bd1SDionna Glaze /* 322c0461bd1SDionna Glaze * Enable unaccepted memory before calling exit boot services in order 323c0461bd1SDionna Glaze * for the UEFI to not accept all memory on EBS. 324c0461bd1SDionna Glaze */ 325c0461bd1SDionna Glaze status = efi_bs_call(locate_protocol, &mem_acceptance_proto, NULL, 326c0461bd1SDionna Glaze (void **)&proto); 327c0461bd1SDionna Glaze if (status != EFI_SUCCESS) 328c0461bd1SDionna Glaze return; 329c0461bd1SDionna Glaze 330c0461bd1SDionna Glaze status = efi_call_proto(proto, allow_unaccepted_memory); 331c0461bd1SDionna Glaze if (status != EFI_SUCCESS) 332c0461bd1SDionna Glaze efi_err("Memory acceptance protocol failed\n"); 333c0461bd1SDionna Glaze } 334c0461bd1SDionna Glaze 335c2d0b470SArd Biesheuvel static const efi_char16_t apple[] = L"Apple"; 336c2d0b470SArd Biesheuvel 33782e0d6d7SBaskov Evgeniy static void setup_quirks(struct boot_params *boot_params, 33882e0d6d7SBaskov Evgeniy unsigned long image_base, 33982e0d6d7SBaskov Evgeniy unsigned long image_size) 340c2d0b470SArd Biesheuvel { 341c2d0b470SArd Biesheuvel efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) 342ccc27ae7SArd Biesheuvel efi_table_attr(efi_system_table, fw_vendor); 343c2d0b470SArd Biesheuvel 344c2d0b470SArd Biesheuvel if (!memcmp(fw_vendor, apple, sizeof(apple))) { 345c2d0b470SArd Biesheuvel if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) 346c2d0b470SArd Biesheuvel retrieve_apple_device_properties(boot_params); 347c2d0b470SArd Biesheuvel } 34882e0d6d7SBaskov Evgeniy 34982e0d6d7SBaskov Evgeniy if (IS_ENABLED(CONFIG_EFI_DXE_MEM_ATTRIBUTES)) 35082e0d6d7SBaskov Evgeniy setup_memory_protection(image_base, image_size); 351c2d0b470SArd Biesheuvel } 352c2d0b470SArd Biesheuvel 353c2d0b470SArd Biesheuvel /* 354c2d0b470SArd Biesheuvel * See if we have Universal Graphics Adapter (UGA) protocol 355c2d0b470SArd Biesheuvel */ 356c2d0b470SArd Biesheuvel static efi_status_t 357c2d0b470SArd Biesheuvel setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) 358c2d0b470SArd Biesheuvel { 359c2d0b470SArd Biesheuvel efi_status_t status; 360c2d0b470SArd Biesheuvel u32 width, height; 361c2d0b470SArd Biesheuvel void **uga_handle = NULL; 362c2d0b470SArd Biesheuvel efi_uga_draw_protocol_t *uga = NULL, *first_uga; 363c2d0b470SArd Biesheuvel efi_handle_t handle; 364c2d0b470SArd Biesheuvel int i; 365c2d0b470SArd Biesheuvel 366c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 367c2d0b470SArd Biesheuvel (void **)&uga_handle); 368c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 369c2d0b470SArd Biesheuvel return status; 370c2d0b470SArd Biesheuvel 371c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 372c2d0b470SArd Biesheuvel uga_proto, NULL, &size, uga_handle); 373c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 374c2d0b470SArd Biesheuvel goto free_handle; 375c2d0b470SArd Biesheuvel 376c2d0b470SArd Biesheuvel height = 0; 377c2d0b470SArd Biesheuvel width = 0; 378c2d0b470SArd Biesheuvel 379c2d0b470SArd Biesheuvel first_uga = NULL; 380c2d0b470SArd Biesheuvel for_each_efi_handle(handle, uga_handle, size, i) { 381c2d0b470SArd Biesheuvel efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; 382c2d0b470SArd Biesheuvel u32 w, h, depth, refresh; 383c2d0b470SArd Biesheuvel void *pciio; 384c2d0b470SArd Biesheuvel 385c2d0b470SArd Biesheuvel status = efi_bs_call(handle_protocol, handle, uga_proto, 386c2d0b470SArd Biesheuvel (void **)&uga); 387c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 388c2d0b470SArd Biesheuvel continue; 389c2d0b470SArd Biesheuvel 390c2d0b470SArd Biesheuvel pciio = NULL; 391c2d0b470SArd Biesheuvel efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); 392c2d0b470SArd Biesheuvel 393c2d0b470SArd Biesheuvel status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); 394c2d0b470SArd Biesheuvel if (status == EFI_SUCCESS && (!first_uga || pciio)) { 395c2d0b470SArd Biesheuvel width = w; 396c2d0b470SArd Biesheuvel height = h; 397c2d0b470SArd Biesheuvel 398c2d0b470SArd Biesheuvel /* 399c2d0b470SArd Biesheuvel * Once we've found a UGA supporting PCIIO, 400c2d0b470SArd Biesheuvel * don't bother looking any further. 401c2d0b470SArd Biesheuvel */ 402c2d0b470SArd Biesheuvel if (pciio) 403c2d0b470SArd Biesheuvel break; 404c2d0b470SArd Biesheuvel 405c2d0b470SArd Biesheuvel first_uga = uga; 406c2d0b470SArd Biesheuvel } 407c2d0b470SArd Biesheuvel } 408c2d0b470SArd Biesheuvel 409c2d0b470SArd Biesheuvel if (!width && !height) 410c2d0b470SArd Biesheuvel goto free_handle; 411c2d0b470SArd Biesheuvel 412c2d0b470SArd Biesheuvel /* EFI framebuffer */ 413c2d0b470SArd Biesheuvel si->orig_video_isVGA = VIDEO_TYPE_EFI; 414c2d0b470SArd Biesheuvel 415c2d0b470SArd Biesheuvel si->lfb_depth = 32; 416c2d0b470SArd Biesheuvel si->lfb_width = width; 417c2d0b470SArd Biesheuvel si->lfb_height = height; 418c2d0b470SArd Biesheuvel 419c2d0b470SArd Biesheuvel si->red_size = 8; 420c2d0b470SArd Biesheuvel si->red_pos = 16; 421c2d0b470SArd Biesheuvel si->green_size = 8; 422c2d0b470SArd Biesheuvel si->green_pos = 8; 423c2d0b470SArd Biesheuvel si->blue_size = 8; 424c2d0b470SArd Biesheuvel si->blue_pos = 0; 425c2d0b470SArd Biesheuvel si->rsvd_size = 8; 426c2d0b470SArd Biesheuvel si->rsvd_pos = 24; 427c2d0b470SArd Biesheuvel 428c2d0b470SArd Biesheuvel free_handle: 429c2d0b470SArd Biesheuvel efi_bs_call(free_pool, uga_handle); 430c2d0b470SArd Biesheuvel 431c2d0b470SArd Biesheuvel return status; 432c2d0b470SArd Biesheuvel } 433c2d0b470SArd Biesheuvel 434c2d0b470SArd Biesheuvel static void setup_graphics(struct boot_params *boot_params) 435c2d0b470SArd Biesheuvel { 436c2d0b470SArd Biesheuvel efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; 437c2d0b470SArd Biesheuvel struct screen_info *si; 438c2d0b470SArd Biesheuvel efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; 439c2d0b470SArd Biesheuvel efi_status_t status; 440c2d0b470SArd Biesheuvel unsigned long size; 441c2d0b470SArd Biesheuvel void **gop_handle = NULL; 442c2d0b470SArd Biesheuvel void **uga_handle = NULL; 443c2d0b470SArd Biesheuvel 444c2d0b470SArd Biesheuvel si = &boot_params->screen_info; 445c2d0b470SArd Biesheuvel memset(si, 0, sizeof(*si)); 446c2d0b470SArd Biesheuvel 447c2d0b470SArd Biesheuvel size = 0; 448c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 449c2d0b470SArd Biesheuvel &graphics_proto, NULL, &size, gop_handle); 450c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 451c2d0b470SArd Biesheuvel status = efi_setup_gop(si, &graphics_proto, size); 452c2d0b470SArd Biesheuvel 453c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 454c2d0b470SArd Biesheuvel size = 0; 455c2d0b470SArd Biesheuvel status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, 456c2d0b470SArd Biesheuvel &uga_proto, NULL, &size, uga_handle); 457c2d0b470SArd Biesheuvel if (status == EFI_BUFFER_TOO_SMALL) 458c2d0b470SArd Biesheuvel setup_uga(si, &uga_proto, size); 459c2d0b470SArd Biesheuvel } 460c2d0b470SArd Biesheuvel } 461c2d0b470SArd Biesheuvel 4623b8f44fcSArd Biesheuvel 4633b8f44fcSArd Biesheuvel static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status) 4643b8f44fcSArd Biesheuvel { 4653b8f44fcSArd Biesheuvel efi_bs_call(exit, handle, status, 0, NULL); 466f3fa0efcSArd Biesheuvel for(;;) 467f3fa0efcSArd Biesheuvel asm("hlt"); 4683b8f44fcSArd Biesheuvel } 4693b8f44fcSArd Biesheuvel 470c2d0b470SArd Biesheuvel void __noreturn efi_stub_entry(efi_handle_t handle, 471c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg, 472c2d0b470SArd Biesheuvel struct boot_params *boot_params); 473c2d0b470SArd Biesheuvel 474c2d0b470SArd Biesheuvel /* 475c2d0b470SArd Biesheuvel * Because the x86 boot code expects to be passed a boot_params we 476c2d0b470SArd Biesheuvel * need to create one ourselves (usually the bootloader would create 477c2d0b470SArd Biesheuvel * one for us). 478c2d0b470SArd Biesheuvel */ 479c2d0b470SArd Biesheuvel efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, 480c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg) 481c2d0b470SArd Biesheuvel { 482c2d0b470SArd Biesheuvel struct boot_params *boot_params; 483c2d0b470SArd Biesheuvel struct setup_header *hdr; 4841887c9b6SArvind Sankar void *image_base; 485c2d0b470SArd Biesheuvel efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; 486c2d0b470SArd Biesheuvel int options_size = 0; 487c2d0b470SArd Biesheuvel efi_status_t status; 488c2d0b470SArd Biesheuvel char *cmdline_ptr; 489c2d0b470SArd Biesheuvel 490ccc27ae7SArd Biesheuvel efi_system_table = sys_table_arg; 491c2d0b470SArd Biesheuvel 492c2d0b470SArd Biesheuvel /* Check if we were booted by the EFI firmware */ 493ccc27ae7SArd Biesheuvel if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 4943b8f44fcSArd Biesheuvel efi_exit(handle, EFI_INVALID_PARAMETER); 495c2d0b470SArd Biesheuvel 4960347d8c2SArvind Sankar status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image); 497c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 49836bdd0a7SArvind Sankar efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); 4993b8f44fcSArd Biesheuvel efi_exit(handle, status); 500c2d0b470SArd Biesheuvel } 501c2d0b470SArd Biesheuvel 5021887c9b6SArvind Sankar image_base = efi_table_attr(image, image_base); 5031887c9b6SArvind Sankar image_offset = (void *)startup_32 - image_base; 5041887c9b6SArvind Sankar 505019512f1SArvind Sankar status = efi_allocate_pages(sizeof(struct boot_params), 506019512f1SArvind Sankar (unsigned long *)&boot_params, ULONG_MAX); 507c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 50836bdd0a7SArvind Sankar efi_err("Failed to allocate lowmem for boot params\n"); 5093b8f44fcSArd Biesheuvel efi_exit(handle, status); 510c2d0b470SArd Biesheuvel } 511c2d0b470SArd Biesheuvel 512019512f1SArvind Sankar memset(boot_params, 0x0, sizeof(struct boot_params)); 513c2d0b470SArd Biesheuvel 514c2d0b470SArd Biesheuvel hdr = &boot_params->hdr; 515c2d0b470SArd Biesheuvel 51659476f80SArvind Sankar /* Copy the setup header from the second sector to boot_params */ 51759476f80SArvind Sankar memcpy(&hdr->jump, image_base + 512, 51859476f80SArvind Sankar sizeof(struct setup_header) - offsetof(struct setup_header, jump)); 519c2d0b470SArd Biesheuvel 520c2d0b470SArd Biesheuvel /* 521c2d0b470SArd Biesheuvel * Fill out some of the header fields ourselves because the 522c2d0b470SArd Biesheuvel * EFI firmware loader doesn't load the first sector. 523c2d0b470SArd Biesheuvel */ 524c2d0b470SArd Biesheuvel hdr->root_flags = 1; 525c2d0b470SArd Biesheuvel hdr->vid_mode = 0xffff; 526c2d0b470SArd Biesheuvel hdr->boot_flag = 0xAA55; 527c2d0b470SArd Biesheuvel 528c2d0b470SArd Biesheuvel hdr->type_of_loader = 0x21; 529c2d0b470SArd Biesheuvel 530c2d0b470SArd Biesheuvel /* Convert unicode cmdline to ascii */ 53127cd5511SArd Biesheuvel cmdline_ptr = efi_convert_cmdline(image, &options_size); 532c2d0b470SArd Biesheuvel if (!cmdline_ptr) 533c2d0b470SArd Biesheuvel goto fail; 534c2d0b470SArd Biesheuvel 535eed4e019SArvind Sankar efi_set_u64_split((unsigned long)cmdline_ptr, 536eed4e019SArvind Sankar &hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr); 537c2d0b470SArd Biesheuvel 538c2d0b470SArd Biesheuvel hdr->ramdisk_image = 0; 539c2d0b470SArd Biesheuvel hdr->ramdisk_size = 0; 540c2d0b470SArd Biesheuvel 54163bf28ceSArd Biesheuvel /* 54263bf28ceSArd Biesheuvel * Disregard any setup data that was provided by the bootloader: 54363bf28ceSArd Biesheuvel * setup_data could be pointing anywhere, and we have no way of 54463bf28ceSArd Biesheuvel * authenticating or validating the payload. 54563bf28ceSArd Biesheuvel */ 54663bf28ceSArd Biesheuvel hdr->setup_data = 0; 54763bf28ceSArd Biesheuvel 548ccc27ae7SArd Biesheuvel efi_stub_entry(handle, sys_table_arg, boot_params); 549c2d0b470SArd Biesheuvel /* not reached */ 550c2d0b470SArd Biesheuvel 551c2d0b470SArd Biesheuvel fail: 552019512f1SArvind Sankar efi_free(sizeof(struct boot_params), (unsigned long)boot_params); 553c2d0b470SArd Biesheuvel 5543b8f44fcSArd Biesheuvel efi_exit(handle, status); 555c2d0b470SArd Biesheuvel } 556c2d0b470SArd Biesheuvel 557c2d0b470SArd Biesheuvel static void add_e820ext(struct boot_params *params, 558c2d0b470SArd Biesheuvel struct setup_data *e820ext, u32 nr_entries) 559c2d0b470SArd Biesheuvel { 560c2d0b470SArd Biesheuvel struct setup_data *data; 561c2d0b470SArd Biesheuvel 562c2d0b470SArd Biesheuvel e820ext->type = SETUP_E820_EXT; 563c2d0b470SArd Biesheuvel e820ext->len = nr_entries * sizeof(struct boot_e820_entry); 564c2d0b470SArd Biesheuvel e820ext->next = 0; 565c2d0b470SArd Biesheuvel 566c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)params->hdr.setup_data; 567c2d0b470SArd Biesheuvel 568c2d0b470SArd Biesheuvel while (data && data->next) 569c2d0b470SArd Biesheuvel data = (struct setup_data *)(unsigned long)data->next; 570c2d0b470SArd Biesheuvel 571c2d0b470SArd Biesheuvel if (data) 572c2d0b470SArd Biesheuvel data->next = (unsigned long)e820ext; 573c2d0b470SArd Biesheuvel else 574c2d0b470SArd Biesheuvel params->hdr.setup_data = (unsigned long)e820ext; 575c2d0b470SArd Biesheuvel } 576c2d0b470SArd Biesheuvel 577c2d0b470SArd Biesheuvel static efi_status_t 578c2d0b470SArd Biesheuvel setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) 579c2d0b470SArd Biesheuvel { 580c2d0b470SArd Biesheuvel struct boot_e820_entry *entry = params->e820_table; 581c2d0b470SArd Biesheuvel struct efi_info *efi = ¶ms->efi_info; 582c2d0b470SArd Biesheuvel struct boot_e820_entry *prev = NULL; 583c2d0b470SArd Biesheuvel u32 nr_entries; 584c2d0b470SArd Biesheuvel u32 nr_desc; 585c2d0b470SArd Biesheuvel int i; 586c2d0b470SArd Biesheuvel 587c2d0b470SArd Biesheuvel nr_entries = 0; 588c2d0b470SArd Biesheuvel nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; 589c2d0b470SArd Biesheuvel 590c2d0b470SArd Biesheuvel for (i = 0; i < nr_desc; i++) { 591c2d0b470SArd Biesheuvel efi_memory_desc_t *d; 592c2d0b470SArd Biesheuvel unsigned int e820_type = 0; 593c2d0b470SArd Biesheuvel unsigned long m = efi->efi_memmap; 594c2d0b470SArd Biesheuvel 595c2d0b470SArd Biesheuvel #ifdef CONFIG_X86_64 596c2d0b470SArd Biesheuvel m |= (u64)efi->efi_memmap_hi << 32; 597c2d0b470SArd Biesheuvel #endif 598c2d0b470SArd Biesheuvel 599c2d0b470SArd Biesheuvel d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); 600c2d0b470SArd Biesheuvel switch (d->type) { 601c2d0b470SArd Biesheuvel case EFI_RESERVED_TYPE: 602c2d0b470SArd Biesheuvel case EFI_RUNTIME_SERVICES_CODE: 603c2d0b470SArd Biesheuvel case EFI_RUNTIME_SERVICES_DATA: 604c2d0b470SArd Biesheuvel case EFI_MEMORY_MAPPED_IO: 605c2d0b470SArd Biesheuvel case EFI_MEMORY_MAPPED_IO_PORT_SPACE: 606c2d0b470SArd Biesheuvel case EFI_PAL_CODE: 607c2d0b470SArd Biesheuvel e820_type = E820_TYPE_RESERVED; 608c2d0b470SArd Biesheuvel break; 609c2d0b470SArd Biesheuvel 610c2d0b470SArd Biesheuvel case EFI_UNUSABLE_MEMORY: 611c2d0b470SArd Biesheuvel e820_type = E820_TYPE_UNUSABLE; 612c2d0b470SArd Biesheuvel break; 613c2d0b470SArd Biesheuvel 614c2d0b470SArd Biesheuvel case EFI_ACPI_RECLAIM_MEMORY: 615c2d0b470SArd Biesheuvel e820_type = E820_TYPE_ACPI; 616c2d0b470SArd Biesheuvel break; 617c2d0b470SArd Biesheuvel 618c2d0b470SArd Biesheuvel case EFI_LOADER_CODE: 619c2d0b470SArd Biesheuvel case EFI_LOADER_DATA: 620c2d0b470SArd Biesheuvel case EFI_BOOT_SERVICES_CODE: 621c2d0b470SArd Biesheuvel case EFI_BOOT_SERVICES_DATA: 622c2d0b470SArd Biesheuvel case EFI_CONVENTIONAL_MEMORY: 623c2d0b470SArd Biesheuvel if (efi_soft_reserve_enabled() && 624c2d0b470SArd Biesheuvel (d->attribute & EFI_MEMORY_SP)) 625c2d0b470SArd Biesheuvel e820_type = E820_TYPE_SOFT_RESERVED; 626c2d0b470SArd Biesheuvel else 627c2d0b470SArd Biesheuvel e820_type = E820_TYPE_RAM; 628c2d0b470SArd Biesheuvel break; 629c2d0b470SArd Biesheuvel 630c2d0b470SArd Biesheuvel case EFI_ACPI_MEMORY_NVS: 631c2d0b470SArd Biesheuvel e820_type = E820_TYPE_NVS; 632c2d0b470SArd Biesheuvel break; 633c2d0b470SArd Biesheuvel 634c2d0b470SArd Biesheuvel case EFI_PERSISTENT_MEMORY: 635c2d0b470SArd Biesheuvel e820_type = E820_TYPE_PMEM; 636c2d0b470SArd Biesheuvel break; 637c2d0b470SArd Biesheuvel 638745e3ed8SKirill A. Shutemov case EFI_UNACCEPTED_MEMORY: 639745e3ed8SKirill A. Shutemov if (!IS_ENABLED(CONFIG_UNACCEPTED_MEMORY)) { 640745e3ed8SKirill A. Shutemov efi_warn_once( 641745e3ed8SKirill A. Shutemov "The system has unaccepted memory, but kernel does not support it\nConsider enabling CONFIG_UNACCEPTED_MEMORY\n"); 642745e3ed8SKirill A. Shutemov continue; 643745e3ed8SKirill A. Shutemov } 644745e3ed8SKirill A. Shutemov e820_type = E820_TYPE_RAM; 645745e3ed8SKirill A. Shutemov process_unaccepted_memory(d->phys_addr, 646745e3ed8SKirill A. Shutemov d->phys_addr + PAGE_SIZE * d->num_pages); 647745e3ed8SKirill A. Shutemov break; 648c2d0b470SArd Biesheuvel default: 649c2d0b470SArd Biesheuvel continue; 650c2d0b470SArd Biesheuvel } 651c2d0b470SArd Biesheuvel 652c2d0b470SArd Biesheuvel /* Merge adjacent mappings */ 653c2d0b470SArd Biesheuvel if (prev && prev->type == e820_type && 654c2d0b470SArd Biesheuvel (prev->addr + prev->size) == d->phys_addr) { 655c2d0b470SArd Biesheuvel prev->size += d->num_pages << 12; 656c2d0b470SArd Biesheuvel continue; 657c2d0b470SArd Biesheuvel } 658c2d0b470SArd Biesheuvel 659c2d0b470SArd Biesheuvel if (nr_entries == ARRAY_SIZE(params->e820_table)) { 660c2d0b470SArd Biesheuvel u32 need = (nr_desc - i) * sizeof(struct e820_entry) + 661c2d0b470SArd Biesheuvel sizeof(struct setup_data); 662c2d0b470SArd Biesheuvel 663c2d0b470SArd Biesheuvel if (!e820ext || e820ext_size < need) 664c2d0b470SArd Biesheuvel return EFI_BUFFER_TOO_SMALL; 665c2d0b470SArd Biesheuvel 666c2d0b470SArd Biesheuvel /* boot_params map full, switch to e820 extended */ 667c2d0b470SArd Biesheuvel entry = (struct boot_e820_entry *)e820ext->data; 668c2d0b470SArd Biesheuvel } 669c2d0b470SArd Biesheuvel 670c2d0b470SArd Biesheuvel entry->addr = d->phys_addr; 671c2d0b470SArd Biesheuvel entry->size = d->num_pages << PAGE_SHIFT; 672c2d0b470SArd Biesheuvel entry->type = e820_type; 673c2d0b470SArd Biesheuvel prev = entry++; 674c2d0b470SArd Biesheuvel nr_entries++; 675c2d0b470SArd Biesheuvel } 676c2d0b470SArd Biesheuvel 677c2d0b470SArd Biesheuvel if (nr_entries > ARRAY_SIZE(params->e820_table)) { 678c2d0b470SArd Biesheuvel u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); 679c2d0b470SArd Biesheuvel 680c2d0b470SArd Biesheuvel add_e820ext(params, e820ext, nr_e820ext); 681c2d0b470SArd Biesheuvel nr_entries -= nr_e820ext; 682c2d0b470SArd Biesheuvel } 683c2d0b470SArd Biesheuvel 684c2d0b470SArd Biesheuvel params->e820_entries = (u8)nr_entries; 685c2d0b470SArd Biesheuvel 686c2d0b470SArd Biesheuvel return EFI_SUCCESS; 687c2d0b470SArd Biesheuvel } 688c2d0b470SArd Biesheuvel 689c2d0b470SArd Biesheuvel static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, 690c2d0b470SArd Biesheuvel u32 *e820ext_size) 691c2d0b470SArd Biesheuvel { 692c2d0b470SArd Biesheuvel efi_status_t status; 693c2d0b470SArd Biesheuvel unsigned long size; 694c2d0b470SArd Biesheuvel 695c2d0b470SArd Biesheuvel size = sizeof(struct setup_data) + 696c2d0b470SArd Biesheuvel sizeof(struct e820_entry) * nr_desc; 697c2d0b470SArd Biesheuvel 698c2d0b470SArd Biesheuvel if (*e820ext) { 699c2d0b470SArd Biesheuvel efi_bs_call(free_pool, *e820ext); 700c2d0b470SArd Biesheuvel *e820ext = NULL; 701c2d0b470SArd Biesheuvel *e820ext_size = 0; 702c2d0b470SArd Biesheuvel } 703c2d0b470SArd Biesheuvel 704c2d0b470SArd Biesheuvel status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, 705c2d0b470SArd Biesheuvel (void **)e820ext); 706c2d0b470SArd Biesheuvel if (status == EFI_SUCCESS) 707c2d0b470SArd Biesheuvel *e820ext_size = size; 708c2d0b470SArd Biesheuvel 709c2d0b470SArd Biesheuvel return status; 710c2d0b470SArd Biesheuvel } 711c2d0b470SArd Biesheuvel 712c2d0b470SArd Biesheuvel static efi_status_t allocate_e820(struct boot_params *params, 713c2d0b470SArd Biesheuvel struct setup_data **e820ext, 714c2d0b470SArd Biesheuvel u32 *e820ext_size) 715c2d0b470SArd Biesheuvel { 7162e9f46eeSKirill A. Shutemov struct efi_boot_memmap *map; 717c2d0b470SArd Biesheuvel efi_status_t status; 7182e9f46eeSKirill A. Shutemov __u32 nr_desc; 719c2d0b470SArd Biesheuvel 7202e9f46eeSKirill A. Shutemov status = efi_get_memory_map(&map, false); 721c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 722c2d0b470SArd Biesheuvel return status; 7232e9f46eeSKirill A. Shutemov 7242e9f46eeSKirill A. Shutemov nr_desc = map->map_size / map->desc_size; 7252e9f46eeSKirill A. Shutemov if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) { 7262e9f46eeSKirill A. Shutemov u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) + 7272e9f46eeSKirill A. Shutemov EFI_MMAP_NR_SLACK_SLOTS; 7282e9f46eeSKirill A. Shutemov 7292e9f46eeSKirill A. Shutemov status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); 730c2d0b470SArd Biesheuvel } 731c2d0b470SArd Biesheuvel 732745e3ed8SKirill A. Shutemov if (IS_ENABLED(CONFIG_UNACCEPTED_MEMORY) && status == EFI_SUCCESS) 733745e3ed8SKirill A. Shutemov status = allocate_unaccepted_bitmap(nr_desc, map); 734745e3ed8SKirill A. Shutemov 7352e9f46eeSKirill A. Shutemov efi_bs_call(free_pool, map); 7362e9f46eeSKirill A. Shutemov return status; 737c2d0b470SArd Biesheuvel } 738c2d0b470SArd Biesheuvel 739c2d0b470SArd Biesheuvel struct exit_boot_struct { 740c2d0b470SArd Biesheuvel struct boot_params *boot_params; 741c2d0b470SArd Biesheuvel struct efi_info *efi; 742c2d0b470SArd Biesheuvel }; 743c2d0b470SArd Biesheuvel 744c2d0b470SArd Biesheuvel static efi_status_t exit_boot_func(struct efi_boot_memmap *map, 745c2d0b470SArd Biesheuvel void *priv) 746c2d0b470SArd Biesheuvel { 747c2d0b470SArd Biesheuvel const char *signature; 748c2d0b470SArd Biesheuvel struct exit_boot_struct *p = priv; 749c2d0b470SArd Biesheuvel 750c2d0b470SArd Biesheuvel signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE 751c2d0b470SArd Biesheuvel : EFI32_LOADER_SIGNATURE; 752c2d0b470SArd Biesheuvel memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); 753c2d0b470SArd Biesheuvel 754eed4e019SArvind Sankar efi_set_u64_split((unsigned long)efi_system_table, 755eed4e019SArvind Sankar &p->efi->efi_systab, &p->efi->efi_systab_hi); 756eab31265SArd Biesheuvel p->efi->efi_memdesc_size = map->desc_size; 757eab31265SArd Biesheuvel p->efi->efi_memdesc_version = map->desc_ver; 758eab31265SArd Biesheuvel efi_set_u64_split((unsigned long)map->map, 759eed4e019SArvind Sankar &p->efi->efi_memmap, &p->efi->efi_memmap_hi); 760eab31265SArd Biesheuvel p->efi->efi_memmap_size = map->map_size; 761c2d0b470SArd Biesheuvel 762c2d0b470SArd Biesheuvel return EFI_SUCCESS; 763c2d0b470SArd Biesheuvel } 764c2d0b470SArd Biesheuvel 765c2d0b470SArd Biesheuvel static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) 766c2d0b470SArd Biesheuvel { 767c2d0b470SArd Biesheuvel struct setup_data *e820ext = NULL; 768c2d0b470SArd Biesheuvel __u32 e820ext_size = 0; 769c2d0b470SArd Biesheuvel efi_status_t status; 770c2d0b470SArd Biesheuvel struct exit_boot_struct priv; 771c2d0b470SArd Biesheuvel 772c2d0b470SArd Biesheuvel priv.boot_params = boot_params; 773c2d0b470SArd Biesheuvel priv.efi = &boot_params->efi_info; 774c2d0b470SArd Biesheuvel 775c2d0b470SArd Biesheuvel status = allocate_e820(boot_params, &e820ext, &e820ext_size); 776c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 777c2d0b470SArd Biesheuvel return status; 778c2d0b470SArd Biesheuvel 779c2d0b470SArd Biesheuvel /* Might as well exit boot services now */ 780eab31265SArd Biesheuvel status = efi_exit_boot_services(handle, &priv, exit_boot_func); 781c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 782c2d0b470SArd Biesheuvel return status; 783c2d0b470SArd Biesheuvel 784c2d0b470SArd Biesheuvel /* Historic? */ 785c2d0b470SArd Biesheuvel boot_params->alt_mem_k = 32 * 1024; 786c2d0b470SArd Biesheuvel 787c2d0b470SArd Biesheuvel status = setup_e820(boot_params, e820ext, e820ext_size); 788c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) 789c2d0b470SArd Biesheuvel return status; 790c2d0b470SArd Biesheuvel 791c2d0b470SArd Biesheuvel return EFI_SUCCESS; 792c2d0b470SArd Biesheuvel } 793c2d0b470SArd Biesheuvel 794*31c77a50SArd Biesheuvel static bool have_unsupported_snp_features(void) 795*31c77a50SArd Biesheuvel { 796*31c77a50SArd Biesheuvel u64 unsupported; 797*31c77a50SArd Biesheuvel 798*31c77a50SArd Biesheuvel unsupported = snp_get_unsupported_features(sev_get_status()); 799*31c77a50SArd Biesheuvel if (unsupported) { 800*31c77a50SArd Biesheuvel efi_err("Unsupported SEV-SNP features detected: 0x%llx\n", 801*31c77a50SArd Biesheuvel unsupported); 802*31c77a50SArd Biesheuvel return true; 803*31c77a50SArd Biesheuvel } 804*31c77a50SArd Biesheuvel return false; 805*31c77a50SArd Biesheuvel } 806*31c77a50SArd Biesheuvel 807d2d7a54fSArd Biesheuvel static void __noreturn enter_kernel(unsigned long kernel_addr, 808d2d7a54fSArd Biesheuvel struct boot_params *boot_params) 809d2d7a54fSArd Biesheuvel { 810d2d7a54fSArd Biesheuvel /* enter decompressed kernel with boot_params pointer in RSI/ESI */ 811d2d7a54fSArd Biesheuvel asm("jmp *%0"::"r"(kernel_addr), "S"(boot_params)); 812d2d7a54fSArd Biesheuvel 813d2d7a54fSArd Biesheuvel unreachable(); 814d2d7a54fSArd Biesheuvel } 815d2d7a54fSArd Biesheuvel 816c2d0b470SArd Biesheuvel /* 817d2d7a54fSArd Biesheuvel * On success, this routine will jump to the relocated image directly and never 818d2d7a54fSArd Biesheuvel * return. On failure, it will exit to the firmware via efi_exit() instead of 819d2d7a54fSArd Biesheuvel * returning. 820c2d0b470SArd Biesheuvel */ 821df9215f1SArd Biesheuvel void __noreturn efi_stub_entry(efi_handle_t handle, 822c2d0b470SArd Biesheuvel efi_system_table_t *sys_table_arg, 823c2d0b470SArd Biesheuvel struct boot_params *boot_params) 824c2d0b470SArd Biesheuvel { 82511078876SArd Biesheuvel efi_guid_t guid = EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID; 826c2d0b470SArd Biesheuvel unsigned long bzimage_addr = (unsigned long)startup_32; 827d5cdf4cfSArvind Sankar unsigned long buffer_start, buffer_end; 828c2d0b470SArd Biesheuvel struct setup_header *hdr = &boot_params->hdr; 829f4dc7fffSArd Biesheuvel const struct linux_efi_initrd *initrd = NULL; 830c2d0b470SArd Biesheuvel efi_status_t status; 831c2d0b470SArd Biesheuvel 832ccc27ae7SArd Biesheuvel efi_system_table = sys_table_arg; 833c2d0b470SArd Biesheuvel /* Check if we were booted by the EFI firmware */ 834ccc27ae7SArd Biesheuvel if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) 8353b8f44fcSArd Biesheuvel efi_exit(handle, EFI_INVALID_PARAMETER); 836c2d0b470SArd Biesheuvel 837*31c77a50SArd Biesheuvel if (have_unsupported_snp_features()) 838*31c77a50SArd Biesheuvel efi_exit(handle, EFI_UNSUPPORTED); 839*31c77a50SArd Biesheuvel 84011078876SArd Biesheuvel if (IS_ENABLED(CONFIG_EFI_DXE_MEM_ATTRIBUTES)) { 8413ba75c13SBaskov Evgeniy efi_dxe_table = get_efi_config_table(EFI_DXE_SERVICES_TABLE_GUID); 8423ba75c13SBaskov Evgeniy if (efi_dxe_table && 8433ba75c13SBaskov Evgeniy efi_dxe_table->hdr.signature != EFI_DXE_SERVICES_TABLE_SIGNATURE) { 8443ba75c13SBaskov Evgeniy efi_warn("Ignoring DXE services table: invalid signature\n"); 8453ba75c13SBaskov Evgeniy efi_dxe_table = NULL; 8463ba75c13SBaskov Evgeniy } 84711078876SArd Biesheuvel } 84811078876SArd Biesheuvel 84911078876SArd Biesheuvel /* grab the memory attributes protocol if it exists */ 85011078876SArd Biesheuvel efi_bs_call(locate_protocol, &guid, NULL, (void **)&memattr); 8513ba75c13SBaskov Evgeniy 852cb1c9e02SArd Biesheuvel status = efi_setup_5level_paging(); 853cb1c9e02SArd Biesheuvel if (status != EFI_SUCCESS) { 854cb1c9e02SArd Biesheuvel efi_err("efi_setup_5level_paging() failed!\n"); 855cb1c9e02SArd Biesheuvel goto fail; 856cb1c9e02SArd Biesheuvel } 857cb1c9e02SArd Biesheuvel 858c2d0b470SArd Biesheuvel /* 859d5cdf4cfSArvind Sankar * If the kernel isn't already loaded at a suitable address, 860d5cdf4cfSArvind Sankar * relocate it. 861d5cdf4cfSArvind Sankar * 862d5cdf4cfSArvind Sankar * It must be loaded above LOAD_PHYSICAL_ADDR. 863d5cdf4cfSArvind Sankar * 864d5cdf4cfSArvind Sankar * The maximum address for 64-bit is 1 << 46 for 4-level paging. This 865d5cdf4cfSArvind Sankar * is defined as the macro MAXMEM, but unfortunately that is not a 866d5cdf4cfSArvind Sankar * compile-time constant if 5-level paging is configured, so we instead 867d5cdf4cfSArvind Sankar * define our own macro for use here. 868d5cdf4cfSArvind Sankar * 869d5cdf4cfSArvind Sankar * For 32-bit, the maximum address is complicated to figure out, for 870d5cdf4cfSArvind Sankar * now use KERNEL_IMAGE_SIZE, which will be 512MiB, the same as what 871d5cdf4cfSArvind Sankar * KASLR uses. 872d5cdf4cfSArvind Sankar * 87321cb9b41SArvind Sankar * Also relocate it if image_offset is zero, i.e. the kernel wasn't 87421cb9b41SArvind Sankar * loaded by LoadImage, but rather by a bootloader that called the 87521cb9b41SArvind Sankar * handover entry. The reason we must always relocate in this case is 87621cb9b41SArvind Sankar * to handle the case of systemd-boot booting a unified kernel image, 87721cb9b41SArvind Sankar * which is a PE executable that contains the bzImage and an initrd as 87821cb9b41SArvind Sankar * COFF sections. The initrd section is placed after the bzImage 87921cb9b41SArvind Sankar * without ensuring that there are at least init_size bytes available 88021cb9b41SArvind Sankar * for the bzImage, and thus the compressed kernel's startup code may 88121cb9b41SArvind Sankar * overwrite the initrd unless it is moved out of the way. 882c2d0b470SArd Biesheuvel */ 883d5cdf4cfSArvind Sankar 884d5cdf4cfSArvind Sankar buffer_start = ALIGN(bzimage_addr - image_offset, 885d5cdf4cfSArvind Sankar hdr->kernel_alignment); 886d5cdf4cfSArvind Sankar buffer_end = buffer_start + hdr->init_size; 887d5cdf4cfSArvind Sankar 888d5cdf4cfSArvind Sankar if ((buffer_start < LOAD_PHYSICAL_ADDR) || 889d5cdf4cfSArvind Sankar (IS_ENABLED(CONFIG_X86_32) && buffer_end > KERNEL_IMAGE_SIZE) || 890d5cdf4cfSArvind Sankar (IS_ENABLED(CONFIG_X86_64) && buffer_end > MAXMEM_X86_64_4LEVEL) || 89121cb9b41SArvind Sankar (image_offset == 0)) { 892688eb282SArvind Sankar extern char _bss[]; 893688eb282SArvind Sankar 894c2d0b470SArd Biesheuvel status = efi_relocate_kernel(&bzimage_addr, 895688eb282SArvind Sankar (unsigned long)_bss - bzimage_addr, 896688eb282SArvind Sankar hdr->init_size, 897c2d0b470SArd Biesheuvel hdr->pref_address, 898c2d0b470SArd Biesheuvel hdr->kernel_alignment, 899c2d0b470SArd Biesheuvel LOAD_PHYSICAL_ADDR); 900c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 90136bdd0a7SArvind Sankar efi_err("efi_relocate_kernel() failed!\n"); 902c2d0b470SArd Biesheuvel goto fail; 903c2d0b470SArd Biesheuvel } 9041887c9b6SArvind Sankar /* 9051887c9b6SArvind Sankar * Now that we've copied the kernel elsewhere, we no longer 9061887c9b6SArvind Sankar * have a set up block before startup_32(), so reset image_offset 9071887c9b6SArvind Sankar * to zero in case it was set earlier. 9081887c9b6SArvind Sankar */ 9091887c9b6SArvind Sankar image_offset = 0; 910c2d0b470SArd Biesheuvel } 911c2d0b470SArd Biesheuvel 9127dde67f2SArvind Sankar #ifdef CONFIG_CMDLINE_BOOL 913055042beSArvind Sankar status = efi_parse_options(CONFIG_CMDLINE); 914055042beSArvind Sankar if (status != EFI_SUCCESS) { 915055042beSArvind Sankar efi_err("Failed to parse options\n"); 916055042beSArvind Sankar goto fail; 917055042beSArvind Sankar } 9187dde67f2SArvind Sankar #endif 9197dde67f2SArvind Sankar if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { 9207dde67f2SArvind Sankar unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr | 921c2d0b470SArd Biesheuvel ((u64)boot_params->ext_cmd_line_ptr << 32)); 922055042beSArvind Sankar status = efi_parse_options((char *)cmdline_paddr); 923055042beSArvind Sankar if (status != EFI_SUCCESS) { 924055042beSArvind Sankar efi_err("Failed to parse options\n"); 925055042beSArvind Sankar goto fail; 926055042beSArvind Sankar } 9277dde67f2SArvind Sankar } 928c2d0b470SArd Biesheuvel 929c2d0b470SArd Biesheuvel /* 930987053a3SArvind Sankar * At this point, an initrd may already have been loaded by the 931987053a3SArvind Sankar * bootloader and passed via bootparams. We permit an initrd loaded 932987053a3SArvind Sankar * from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it. 933987053a3SArvind Sankar * 934987053a3SArvind Sankar * If the device path is not present, any command-line initrd= 935987053a3SArvind Sankar * arguments will be processed only if image is not NULL, which will be 936987053a3SArvind Sankar * the case only if we were loaded via the PE entry point. 937ec93fc37SArd Biesheuvel */ 938f4dc7fffSArd Biesheuvel status = efi_load_initrd(image, hdr->initrd_addr_max, ULONG_MAX, 939f4dc7fffSArd Biesheuvel &initrd); 94020287d56SArd Biesheuvel if (status != EFI_SUCCESS) 941ec93fc37SArd Biesheuvel goto fail; 942f4dc7fffSArd Biesheuvel if (initrd && initrd->size > 0) { 943f4dc7fffSArd Biesheuvel efi_set_u64_split(initrd->base, &hdr->ramdisk_image, 944eed4e019SArvind Sankar &boot_params->ext_ramdisk_image); 945f4dc7fffSArd Biesheuvel efi_set_u64_split(initrd->size, &hdr->ramdisk_size, 946eed4e019SArvind Sankar &boot_params->ext_ramdisk_size); 94779d3219dSArd Biesheuvel } 948ec93fc37SArd Biesheuvel 949f4dc7fffSArd Biesheuvel 950ec93fc37SArd Biesheuvel /* 951c2d0b470SArd Biesheuvel * If the boot loader gave us a value for secure_boot then we use that, 952c2d0b470SArd Biesheuvel * otherwise we ask the BIOS. 953c2d0b470SArd Biesheuvel */ 954c2d0b470SArd Biesheuvel if (boot_params->secure_boot == efi_secureboot_mode_unset) 955c2d0b470SArd Biesheuvel boot_params->secure_boot = efi_get_secureboot(); 956c2d0b470SArd Biesheuvel 957c2d0b470SArd Biesheuvel /* Ask the firmware to clear memory on unclean shutdown */ 958c2d0b470SArd Biesheuvel efi_enable_reset_attack_mitigation(); 959c2d0b470SArd Biesheuvel 960c2d0b470SArd Biesheuvel efi_random_get_seed(); 961c2d0b470SArd Biesheuvel 962c2d0b470SArd Biesheuvel efi_retrieve_tpm2_eventlog(); 963c2d0b470SArd Biesheuvel 964c2d0b470SArd Biesheuvel setup_graphics(boot_params); 965c2d0b470SArd Biesheuvel 966c2d0b470SArd Biesheuvel setup_efi_pci(boot_params); 967c2d0b470SArd Biesheuvel 96882e0d6d7SBaskov Evgeniy setup_quirks(boot_params, bzimage_addr, buffer_end - buffer_start); 969c2d0b470SArd Biesheuvel 970c0461bd1SDionna Glaze setup_unaccepted_memory(); 971c0461bd1SDionna Glaze 972c2d0b470SArd Biesheuvel status = exit_boot(boot_params, handle); 973c2d0b470SArd Biesheuvel if (status != EFI_SUCCESS) { 97436bdd0a7SArvind Sankar efi_err("exit_boot() failed!\n"); 975c2d0b470SArd Biesheuvel goto fail; 976c2d0b470SArd Biesheuvel } 977c2d0b470SArd Biesheuvel 978cb1c9e02SArd Biesheuvel efi_5level_switch(); 979cb1c9e02SArd Biesheuvel 980d2d7a54fSArd Biesheuvel if (IS_ENABLED(CONFIG_X86_64)) 981d2d7a54fSArd Biesheuvel bzimage_addr += startup_64 - startup_32; 982d2d7a54fSArd Biesheuvel 983d2d7a54fSArd Biesheuvel enter_kernel(bzimage_addr, boot_params); 984c2d0b470SArd Biesheuvel fail: 985df9215f1SArd Biesheuvel efi_err("efi_stub_entry() failed!\n"); 986c2d0b470SArd Biesheuvel 9873b8f44fcSArd Biesheuvel efi_exit(handle, status); 988c2d0b470SArd Biesheuvel } 989df9215f1SArd Biesheuvel 990df9215f1SArd Biesheuvel #ifdef CONFIG_EFI_HANDOVER_PROTOCOL 991d7156b98SArd Biesheuvel void efi_handover_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 992d7156b98SArd Biesheuvel struct boot_params *boot_params) 993d7156b98SArd Biesheuvel { 994d7156b98SArd Biesheuvel extern char _bss[], _ebss[]; 995d7156b98SArd Biesheuvel 996d7156b98SArd Biesheuvel memset(_bss, 0, _ebss - _bss); 997d7156b98SArd Biesheuvel efi_stub_entry(handle, sys_table_arg, boot_params); 998d7156b98SArd Biesheuvel } 999d7156b98SArd Biesheuvel 1000df9215f1SArd Biesheuvel #ifndef CONFIG_EFI_MIXED 1001d7156b98SArd Biesheuvel extern __alias(efi_handover_entry) 1002df9215f1SArd Biesheuvel void efi32_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 1003df9215f1SArd Biesheuvel struct boot_params *boot_params); 1004df9215f1SArd Biesheuvel 1005d7156b98SArd Biesheuvel extern __alias(efi_handover_entry) 1006df9215f1SArd Biesheuvel void efi64_stub_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg, 1007df9215f1SArd Biesheuvel struct boot_params *boot_params); 1008df9215f1SArd Biesheuvel #endif 1009df9215f1SArd Biesheuvel #endif 1010