diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/boot/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/eboot.c | 889 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/eboot.h | 31 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/efi_thunk_64.S | 29 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/head_32.S | 92 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 205 | ||||
| -rw-r--r-- | arch/x86/boot/header.S | 93 | ||||
| -rw-r--r-- | arch/x86/boot/tools/build.c | 106 | ||||
| -rw-r--r-- | arch/x86/include/asm/efi.h | 23 | ||||
| -rw-r--r-- | arch/x86/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/asm-offsets_32.c | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/head_32.S | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/ima_arch.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/kexec-bzimage64.c | 5 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 286 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_32.c | 13 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 14 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_stub_32.S | 21 | ||||
| -rw-r--r-- | arch/x86/platform/efi/quirks.c | 2 |
20 files changed, 586 insertions, 1244 deletions
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index 012b82fc8617..ef9e1f2c836c 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -88,7 +88,7 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE SETUP_OBJS = $(addprefix $(obj)/,$(setup-y)) -sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' +sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|efi32_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' quiet_cmd_zoffset = ZOFFSET $@ cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@ diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 26050ae0b27e..e51879bdc51c 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -87,10 +87,7 @@ endif vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o -$(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone - -vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o \ - $(objtree)/drivers/firmware/efi/libstub/lib.a +vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o # The compressed kernel is built with -fPIC/-fPIE so that a boot loader diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c deleted file mode 100644 index 287393d725f0..000000000000 --- a/arch/x86/boot/compressed/eboot.c +++ /dev/null @@ -1,889 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -/* ----------------------------------------------------------------------- - * - * Copyright 2011 Intel Corporation; author Matt Fleming - * - * ----------------------------------------------------------------------- */ - -#pragma GCC visibility push(hidden) - -#include <linux/efi.h> -#include <linux/pci.h> - -#include <asm/efi.h> -#include <asm/e820/types.h> -#include <asm/setup.h> -#include <asm/desc.h> -#include <asm/boot.h> - -#include "../string.h" -#include "eboot.h" - -static efi_system_table_t *sys_table; -extern const bool efi_is64; - -__pure efi_system_table_t *efi_system_table(void) -{ - return sys_table; -} - -__attribute_const__ bool efi_is_64bit(void) -{ - if (IS_ENABLED(CONFIG_EFI_MIXED)) - return efi_is64; - return IS_ENABLED(CONFIG_X86_64); -} - -static efi_status_t -preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) -{ - struct pci_setup_rom *rom = NULL; - efi_status_t status; - unsigned long size; - uint64_t romsize; - void *romimage; - - /* - * Some firmware images contain EFI function pointers at the place where - * the romimage and romsize fields are supposed to be. Typically the EFI - * code is mapped at high addresses, translating to an unrealistically - * large romsize. The UEFI spec limits the size of option ROMs to 16 - * MiB so we reject any ROMs over 16 MiB in size to catch this. - */ - romimage = efi_table_attr(pci, romimage); - romsize = efi_table_attr(pci, romsize); - if (!romimage || !romsize || romsize > SZ_16M) - return EFI_INVALID_PARAMETER; - - size = romsize + sizeof(*rom); - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&rom); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'rom'\n"); - return status; - } - - memset(rom, 0, sizeof(*rom)); - - rom->data.type = SETUP_PCI; - rom->data.len = size - sizeof(struct setup_data); - rom->data.next = 0; - rom->pcilen = pci->romsize; - *__rom = rom; - - status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, - PCI_VENDOR_ID, 1, &rom->vendor); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to read rom->vendor\n"); - goto free_struct; - } - - status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, - PCI_DEVICE_ID, 1, &rom->devid); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to read rom->devid\n"); - goto free_struct; - } - - status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, - &rom->device, &rom->function); - - if (status != EFI_SUCCESS) - goto free_struct; - - memcpy(rom->romdata, romimage, romsize); - return status; - -free_struct: - efi_bs_call(free_pool, rom); - return status; -} - -/* - * There's no way to return an informative status from this function, - * because any analysis (and printing of error messages) needs to be - * done directly at the EFI function call-site. - * - * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we - * just didn't find any PCI devices, but there's no way to tell outside - * the context of the call. - */ -static void setup_efi_pci(struct boot_params *params) -{ - efi_status_t status; - void **pci_handle = NULL; - efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; - unsigned long size = 0; - struct setup_data *data; - efi_handle_t h; - int i; - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &pci_proto, NULL, &size, pci_handle); - - if (status == EFI_BUFFER_TOO_SMALL) { - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&pci_handle); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'pci_handle'\n"); - return; - } - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &pci_proto, NULL, &size, pci_handle); - } - - if (status != EFI_SUCCESS) - goto free_handle; - - data = (struct setup_data *)(unsigned long)params->hdr.setup_data; - - while (data && data->next) - data = (struct setup_data *)(unsigned long)data->next; - - for_each_efi_handle(h, pci_handle, size, i) { - efi_pci_io_protocol_t *pci = NULL; - struct pci_setup_rom *rom; - - status = efi_bs_call(handle_protocol, h, &pci_proto, - (void **)&pci); - if (status != EFI_SUCCESS || !pci) - continue; - - status = preserve_pci_rom_image(pci, &rom); - if (status != EFI_SUCCESS) - continue; - - if (data) - data->next = (unsigned long)rom; - else - params->hdr.setup_data = (unsigned long)rom; - - data = (struct setup_data *)rom; - } - -free_handle: - efi_bs_call(free_pool, pci_handle); -} - -static void retrieve_apple_device_properties(struct boot_params *boot_params) -{ - efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; - struct setup_data *data, *new; - efi_status_t status; - u32 size = 0; - apple_properties_protocol_t *p; - - status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); - if (status != EFI_SUCCESS) - return; - - if (efi_table_attr(p, version) != 0x10000) { - efi_printk("Unsupported properties proto version\n"); - return; - } - - efi_call_proto(p, get_all, NULL, &size); - if (!size) - return; - - do { - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, - size + sizeof(struct setup_data), - (void **)&new); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'properties'\n"); - return; - } - - status = efi_call_proto(p, get_all, new->data, &size); - - if (status == EFI_BUFFER_TOO_SMALL) - efi_bs_call(free_pool, new); - } while (status == EFI_BUFFER_TOO_SMALL); - - new->type = SETUP_APPLE_PROPERTIES; - new->len = size; - new->next = 0; - - data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; - if (!data) { - boot_params->hdr.setup_data = (unsigned long)new; - } else { - while (data->next) - data = (struct setup_data *)(unsigned long)data->next; - data->next = (unsigned long)new; - } -} - -static const efi_char16_t apple[] = L"Apple"; - -static void setup_quirks(struct boot_params *boot_params) -{ - efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) - efi_table_attr(efi_system_table(), fw_vendor); - - if (!memcmp(fw_vendor, apple, sizeof(apple))) { - if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) - retrieve_apple_device_properties(boot_params); - } -} - -/* - * See if we have Universal Graphics Adapter (UGA) protocol - */ -static efi_status_t -setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) -{ - efi_status_t status; - u32 width, height; - void **uga_handle = NULL; - efi_uga_draw_protocol_t *uga = NULL, *first_uga; - efi_handle_t handle; - int i; - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&uga_handle); - if (status != EFI_SUCCESS) - return status; - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - uga_proto, NULL, &size, uga_handle); - if (status != EFI_SUCCESS) - goto free_handle; - - height = 0; - width = 0; - - first_uga = NULL; - for_each_efi_handle(handle, uga_handle, size, i) { - efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; - u32 w, h, depth, refresh; - void *pciio; - - status = efi_bs_call(handle_protocol, handle, uga_proto, - (void **)&uga); - if (status != EFI_SUCCESS) - continue; - - pciio = NULL; - efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); - - status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); - if (status == EFI_SUCCESS && (!first_uga || pciio)) { - width = w; - height = h; - - /* - * Once we've found a UGA supporting PCIIO, - * don't bother looking any further. - */ - if (pciio) - break; - - first_uga = uga; - } - } - - if (!width && !height) - goto free_handle; - - /* EFI framebuffer */ - si->orig_video_isVGA = VIDEO_TYPE_EFI; - - si->lfb_depth = 32; - si->lfb_width = width; - si->lfb_height = height; - - si->red_size = 8; - si->red_pos = 16; - si->green_size = 8; - si->green_pos = 8; - si->blue_size = 8; - si->blue_pos = 0; - si->rsvd_size = 8; - si->rsvd_pos = 24; - -free_handle: - efi_bs_call(free_pool, uga_handle); - - return status; -} - -void setup_graphics(struct boot_params *boot_params) -{ - efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; - struct screen_info *si; - efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; - efi_status_t status; - unsigned long size; - void **gop_handle = NULL; - void **uga_handle = NULL; - - si = &boot_params->screen_info; - memset(si, 0, sizeof(*si)); - - size = 0; - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &graphics_proto, NULL, &size, gop_handle); - if (status == EFI_BUFFER_TOO_SMALL) - status = efi_setup_gop(si, &graphics_proto, size); - - if (status != EFI_SUCCESS) { - size = 0; - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &uga_proto, NULL, &size, uga_handle); - if (status == EFI_BUFFER_TOO_SMALL) - setup_uga(si, &uga_proto, size); - } -} - -void startup_32(struct boot_params *boot_params); - -void __noreturn efi_stub_entry(efi_handle_t handle, - efi_system_table_t *sys_table_arg, - struct boot_params *boot_params); - -/* - * Because the x86 boot code expects to be passed a boot_params we - * need to create one ourselves (usually the bootloader would create - * one for us). - */ -efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, - efi_system_table_t *sys_table_arg) -{ - struct boot_params *boot_params; - struct apm_bios_info *bi; - struct setup_header *hdr; - efi_loaded_image_t *image; - efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; - int options_size = 0; - efi_status_t status; - char *cmdline_ptr; - unsigned long ramdisk_addr; - unsigned long ramdisk_size; - - sys_table = sys_table_arg; - - /* Check if we were booted by the EFI firmware */ - if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) - return EFI_INVALID_PARAMETER; - - status = efi_bs_call(handle_protocol, handle, &proto, (void *)&image); - if (status != EFI_SUCCESS) { - efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); - return status; - } - - status = efi_low_alloc(0x4000, 1, (unsigned long *)&boot_params); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate lowmem for boot params\n"); - return status; - } - - memset(boot_params, 0x0, 0x4000); - - hdr = &boot_params->hdr; - bi = &boot_params->apm_bios_info; - - /* Copy the second sector to boot_params */ - memcpy(&hdr->jump, image->image_base + 512, 512); - - /* - * Fill out some of the header fields ourselves because the - * EFI firmware loader doesn't load the first sector. - */ - hdr->root_flags = 1; - hdr->vid_mode = 0xffff; - hdr->boot_flag = 0xAA55; - - hdr->type_of_loader = 0x21; - - /* Convert unicode cmdline to ascii */ - cmdline_ptr = efi_convert_cmdline(image, &options_size); - if (!cmdline_ptr) - goto fail; - - hdr->cmd_line_ptr = (unsigned long)cmdline_ptr; - /* Fill in upper bits of command line address, NOP on 32 bit */ - boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32; - - hdr->ramdisk_image = 0; - hdr->ramdisk_size = 0; - - /* Clear APM BIOS info */ - memset(bi, 0, sizeof(*bi)); - - status = efi_parse_options(cmdline_ptr); - if (status != EFI_SUCCESS) - goto fail2; - - status = handle_cmdline_files(image, - (char *)(unsigned long)hdr->cmd_line_ptr, - "initrd=", hdr->initrd_addr_max, - &ramdisk_addr, &ramdisk_size); - - if (status != EFI_SUCCESS && - hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) { - efi_printk("Trying to load files to higher address\n"); - status = handle_cmdline_files(image, - (char *)(unsigned long)hdr->cmd_line_ptr, - "initrd=", -1UL, - &ramdisk_addr, &ramdisk_size); - } - - if (status != EFI_SUCCESS) - goto fail2; - hdr->ramdisk_image = ramdisk_addr & 0xffffffff; - hdr->ramdisk_size = ramdisk_size & 0xffffffff; - boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32; - boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32; - - hdr->code32_start = (u32)(unsigned long)startup_32; - - efi_stub_entry(handle, sys_table, boot_params); - /* not reached */ - -fail2: - efi_free(options_size, hdr->cmd_line_ptr); -fail: - efi_free(0x4000, (unsigned long)boot_params); - - return status; -} - -static void add_e820ext(struct boot_params *params, - struct setup_data *e820ext, u32 nr_entries) -{ - struct setup_data *data; - - e820ext->type = SETUP_E820_EXT; - e820ext->len = nr_entries * sizeof(struct boot_e820_entry); - e820ext->next = 0; - - data = (struct setup_data *)(unsigned long)params->hdr.setup_data; - - while (data && data->next) - data = (struct setup_data *)(unsigned long)data->next; - - if (data) - data->next = (unsigned long)e820ext; - else - params->hdr.setup_data = (unsigned long)e820ext; -} - -static efi_status_t -setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) -{ - struct boot_e820_entry *entry = params->e820_table; - struct efi_info *efi = ¶ms->efi_info; - struct boot_e820_entry *prev = NULL; - u32 nr_entries; - u32 nr_desc; - int i; - - nr_entries = 0; - nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; - - for (i = 0; i < nr_desc; i++) { - efi_memory_desc_t *d; - unsigned int e820_type = 0; - unsigned long m = efi->efi_memmap; - -#ifdef CONFIG_X86_64 - m |= (u64)efi->efi_memmap_hi << 32; -#endif - - d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); - switch (d->type) { - case EFI_RESERVED_TYPE: - case EFI_RUNTIME_SERVICES_CODE: - case EFI_RUNTIME_SERVICES_DATA: - case EFI_MEMORY_MAPPED_IO: - case EFI_MEMORY_MAPPED_IO_PORT_SPACE: - case EFI_PAL_CODE: - e820_type = E820_TYPE_RESERVED; - break; - - case EFI_UNUSABLE_MEMORY: - e820_type = E820_TYPE_UNUSABLE; - break; - - case EFI_ACPI_RECLAIM_MEMORY: - e820_type = E820_TYPE_ACPI; - break; - - case EFI_LOADER_CODE: - case EFI_LOADER_DATA: - case EFI_BOOT_SERVICES_CODE: - case EFI_BOOT_SERVICES_DATA: - case EFI_CONVENTIONAL_MEMORY: - if (efi_soft_reserve_enabled() && - (d->attribute & EFI_MEMORY_SP)) - e820_type = E820_TYPE_SOFT_RESERVED; - else - e820_type = E820_TYPE_RAM; - break; - - case EFI_ACPI_MEMORY_NVS: - e820_type = E820_TYPE_NVS; - break; - - case EFI_PERSISTENT_MEMORY: - e820_type = E820_TYPE_PMEM; - break; - - default: - continue; - } - - /* Merge adjacent mappings */ - if (prev && prev->type == e820_type && - (prev->addr + prev->size) == d->phys_addr) { - prev->size += d->num_pages << 12; - continue; - } - - if (nr_entries == ARRAY_SIZE(params->e820_table)) { - u32 need = (nr_desc - i) * sizeof(struct e820_entry) + - sizeof(struct setup_data); - - if (!e820ext || e820ext_size < need) - return EFI_BUFFER_TOO_SMALL; - - /* boot_params map full, switch to e820 extended */ - entry = (struct boot_e820_entry *)e820ext->data; - } - - entry->addr = d->phys_addr; - entry->size = d->num_pages << PAGE_SHIFT; - entry->type = e820_type; - prev = entry++; - nr_entries++; - } - - if (nr_entries > ARRAY_SIZE(params->e820_table)) { - u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); - - add_e820ext(params, e820ext, nr_e820ext); - nr_entries -= nr_e820ext; - } - - params->e820_entries = (u8)nr_entries; - - return EFI_SUCCESS; -} - -static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, - u32 *e820ext_size) -{ - efi_status_t status; - unsigned long size; - - size = sizeof(struct setup_data) + - sizeof(struct e820_entry) * nr_desc; - - if (*e820ext) { - efi_bs_call(free_pool, *e820ext); - *e820ext = NULL; - *e820ext_size = 0; - } - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)e820ext); - if (status == EFI_SUCCESS) - *e820ext_size = size; - - return status; -} - -static efi_status_t allocate_e820(struct boot_params *params, - struct setup_data **e820ext, - u32 *e820ext_size) -{ - unsigned long map_size, desc_size, buff_size; - struct efi_boot_memmap boot_map; - efi_memory_desc_t *map; - efi_status_t status; - __u32 nr_desc; - - boot_map.map = ↦ - boot_map.map_size = &map_size; - boot_map.desc_size = &desc_size; - boot_map.desc_ver = NULL; - boot_map.key_ptr = NULL; - boot_map.buff_size = &buff_size; - - status = efi_get_memory_map(&boot_map); - if (status != EFI_SUCCESS) - return status; - - nr_desc = buff_size / desc_size; - - if (nr_desc > ARRAY_SIZE(params->e820_table)) { - u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table); - - status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); - if (status != EFI_SUCCESS) - return status; - } - - return EFI_SUCCESS; -} - -struct exit_boot_struct { - struct boot_params *boot_params; - struct efi_info *efi; -}; - -static efi_status_t exit_boot_func(struct efi_boot_memmap *map, - void *priv) -{ - const char *signature; - struct exit_boot_struct *p = priv; - - signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE - : EFI32_LOADER_SIGNATURE; - memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); - - p->efi->efi_systab = (unsigned long)efi_system_table(); - p->efi->efi_memdesc_size = *map->desc_size; - p->efi->efi_memdesc_version = *map->desc_ver; - p->efi->efi_memmap = (unsigned long)*map->map; - p->efi->efi_memmap_size = *map->map_size; - -#ifdef CONFIG_X86_64 - p->efi->efi_systab_hi = (unsigned long)efi_system_table() >> 32; - p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32; -#endif - - return EFI_SUCCESS; -} - -static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) -{ - unsigned long map_sz, key, desc_size, buff_size; - efi_memory_desc_t *mem_map; - struct setup_data *e820ext = NULL; - __u32 e820ext_size = 0; - efi_status_t status; - __u32 desc_version; - struct efi_boot_memmap map; - struct exit_boot_struct priv; - - map.map = &mem_map; - map.map_size = &map_sz; - map.desc_size = &desc_size; - map.desc_ver = &desc_version; - map.key_ptr = &key; - map.buff_size = &buff_size; - priv.boot_params = boot_params; - priv.efi = &boot_params->efi_info; - - status = allocate_e820(boot_params, &e820ext, &e820ext_size); - if (status != EFI_SUCCESS) - return status; - - /* Might as well exit boot services now */ - status = efi_exit_boot_services(handle, &map, &priv, exit_boot_func); - if (status != EFI_SUCCESS) - return status; - - /* Historic? */ - boot_params->alt_mem_k = 32 * 1024; - - status = setup_e820(boot_params, e820ext, e820ext_size); - if (status != EFI_SUCCESS) - return status; - - return EFI_SUCCESS; -} - -/* - * On success we return a pointer to a boot_params structure, and NULL - * on failure. - */ -struct boot_params *efi_main(efi_handle_t handle, - efi_system_table_t *sys_table_arg, - struct boot_params *boot_params) -{ - struct desc_ptr *gdt = NULL; - struct setup_header *hdr = &boot_params->hdr; - efi_status_t status; - struct desc_struct *desc; - unsigned long cmdline_paddr; - - sys_table = sys_table_arg; - - /* Check if we were booted by the EFI firmware */ - if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) - goto fail; - - /* - * make_boot_params() may have been called before efi_main(), in which - * case this is the second time we parse the cmdline. This is ok, - * parsing the cmdline multiple times does not have side-effects. - */ - cmdline_paddr = ((u64)hdr->cmd_line_ptr | - ((u64)boot_params->ext_cmd_line_ptr << 32)); - efi_parse_options((char *)cmdline_paddr); - - /* - * If the boot loader gave us a value for secure_boot then we use that, - * otherwise we ask the BIOS. - */ - if (boot_params->secure_boot == efi_secureboot_mode_unset) - boot_params->secure_boot = efi_get_secureboot(); - - /* Ask the firmware to clear memory on unclean shutdown */ - efi_enable_reset_attack_mitigation(); - - efi_random_get_seed(); - - efi_retrieve_tpm2_eventlog(); - - setup_graphics(boot_params); - - setup_efi_pci(boot_params); - - setup_quirks(boot_params); - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, sizeof(*gdt), - (void **)&gdt); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'gdt' structure\n"); - goto fail; - } - - gdt->size = 0x800; - status = efi_low_alloc(gdt->size, 8, (unsigned long *)&gdt->address); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'gdt'\n"); - goto fail; - } - - /* - * If the kernel isn't already loaded at the preferred load - * address, relocate it. - */ - if (hdr->pref_address != hdr->code32_start) { - unsigned long bzimage_addr = hdr->code32_start; - status = efi_relocate_kernel(&bzimage_addr, - hdr->init_size, hdr->init_size, - hdr->pref_address, - hdr->kernel_alignment, - LOAD_PHYSICAL_ADDR); - if (status != EFI_SUCCESS) { - efi_printk("efi_relocate_kernel() failed!\n"); - goto fail; - } - - hdr->pref_address = hdr->code32_start; - hdr->code32_start = bzimage_addr; - } - - status = exit_boot(boot_params, handle); - if (status != EFI_SUCCESS) { - efi_printk("exit_boot() failed!\n"); - goto fail; - } - - memset((char *)gdt->address, 0x0, gdt->size); - desc = (struct desc_struct *)gdt->address; - - /* The first GDT is a dummy. */ - desc++; - - if (IS_ENABLED(CONFIG_X86_64)) { - /* __KERNEL32_CS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - - desc++; - } else { - /* Second entry is unused on 32-bit */ - desc++; - } - - /* __KERNEL_CS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - - if (IS_ENABLED(CONFIG_X86_64)) { - desc->l = 1; - desc->d = 0; - } else { - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - } - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - - /* __KERNEL_DS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - - if (IS_ENABLED(CONFIG_X86_64)) { - /* Task segment value */ - desc->limit0 = 0x0000; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_TSS; - desc->s = 0; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0x0; - desc->avl = 0; - desc->l = 0; - desc->d = 0; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - } - - asm volatile("cli"); - asm volatile ("lgdt %0" : : "m" (*gdt)); - - return boot_params; -fail: - efi_printk("efi_main() failed!\n"); - - for (;;) - asm("hlt"); -} diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h deleted file mode 100644 index 99f35343d443..000000000000 --- a/arch/x86/boot/compressed/eboot.h +++ /dev/null @@ -1,31 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef BOOT_COMPRESSED_EBOOT_H -#define BOOT_COMPRESSED_EBOOT_H - -#define SEG_TYPE_DATA (0 << 3) -#define SEG_TYPE_READ_WRITE (1 << 1) -#define SEG_TYPE_CODE (1 << 3) -#define SEG_TYPE_EXEC_READ (1 << 1) -#define SEG_TYPE_TSS ((1 << 3) | (1 << 0)) -#define SEG_OP_SIZE_32BIT (1 << 0) -#define SEG_GRANULARITY_4KB (1 << 0) - -#define DESC_TYPE_CODE_DATA (1 << 0) - -typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t; - -union efi_uga_draw_protocol { - struct { - efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *, - u32*, u32*, u32*, u32*); - void *set_mode; - void *blt; - }; - struct { - u32 get_mode; - u32 set_mode; - u32 blt; - } mixed_mode; -}; - -#endif /* BOOT_COMPRESSED_EBOOT_H */ diff --git a/arch/x86/boot/compressed/efi_thunk_64.S b/arch/x86/boot/compressed/efi_thunk_64.S index 8fb7f6799c52..2b2049259619 100644 --- a/arch/x86/boot/compressed/efi_thunk_64.S +++ b/arch/x86/boot/compressed/efi_thunk_64.S @@ -54,11 +54,16 @@ SYM_FUNC_START(__efi64_thunk) * Switch to gdt with 32-bit segments. This is the firmware GDT * that was installed when the kernel started executing. This * pointer was saved at the EFI stub entry point in head_64.S. + * + * Pass the saved DS selector to the 32-bit code, and use far return to + * restore the saved CS selector. */ leaq efi32_boot_gdt(%rip), %rax lgdt (%rax) - pushq $__KERNEL_CS + movzwl efi32_boot_ds(%rip), %edx + movzwq efi32_boot_cs(%rip), %rax + pushq %rax leaq efi_enter32(%rip), %rax pushq %rax lretq @@ -73,6 +78,10 @@ SYM_FUNC_START(__efi64_thunk) movl %ebx, %es pop %rbx movl %ebx, %ds + /* Clear out 32-bit selector from FS and GS */ + xorl %ebx, %ebx + movl %ebx, %fs + movl %ebx, %gs /* * Convert 32-bit status code into 64-bit. @@ -92,10 +101,12 @@ SYM_FUNC_END(__efi64_thunk) * The stack should represent the 32-bit calling convention. */ SYM_FUNC_START_LOCAL(efi_enter32) - movl $__KERNEL_DS, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %ss + /* Load firmware selector into data and stack segment registers */ + movl %edx, %ds + movl %edx, %es + movl %edx, %fs + movl %edx, %gs + movl %edx, %ss /* Reload pgtables */ movl %cr3, %eax @@ -157,6 +168,14 @@ SYM_DATA_START(efi32_boot_gdt) .quad 0 SYM_DATA_END(efi32_boot_gdt) +SYM_DATA_START(efi32_boot_cs) + .word 0 +SYM_DATA_END(efi32_boot_cs) + +SYM_DATA_START(efi32_boot_ds) + .word 0 +SYM_DATA_END(efi32_boot_ds) + SYM_DATA_START(efi_gdt64) .word efi_gdt64_end - efi_gdt64 .long 0 /* Filled out by user */ diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S index 73f17d0544dd..ab3307036ba4 100644 --- a/arch/x86/boot/compressed/head_32.S +++ b/arch/x86/boot/compressed/head_32.S @@ -63,21 +63,7 @@ __HEAD SYM_FUNC_START(startup_32) cld - /* - * Test KEEP_SEGMENTS flag to see if the bootloader is asking - * us to not reload segments - */ - testb $KEEP_SEGMENTS, BP_loadflags(%esi) - jnz 1f - cli - movl $__BOOT_DS, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %fs - movl %eax, %gs - movl %eax, %ss -1: /* * Calculate the delta between where we were compiled to run @@ -89,32 +75,59 @@ SYM_FUNC_START(startup_32) */ leal (BP_scratch+4)(%esi), %esp call 1f -1: popl %ebp - subl $1b, %ebp +1: popl %edx + subl $1b, %edx + + /* Load new GDT */ + leal gdt(%edx), %eax + movl %eax, 2(%eax) + lgdt (%eax) + + /* Load segment registers with our descriptors */ + movl $__BOOT_DS, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %fs + movl %eax, %gs + movl %eax, %ss /* - * %ebp contains the address we are loaded at by the boot loader and %ebx + * %edx contains the address we are loaded at by the boot loader and %ebx * contains the address where we should move the kernel image temporarily - * for safe in-place decompression. + * for safe in-place decompression. %ebp contains the address that the kernel + * will be decompressed to. */ #ifdef CONFIG_RELOCATABLE - movl %ebp, %ebx + movl %edx, %ebx + +#ifdef CONFIG_EFI_STUB +/* + * If we were loaded via the EFI LoadImage service, startup_32() will be at an + * offset to the start of the space allocated for the image. efi_pe_entry() will + * set up image_offset to tell us where the image actually starts, so that we + * can use the full available buffer. + * image_offset = startup_32 - image_base + * Otherwise image_offset will be zero and has no effect on the calculations. + */ + subl image_offset(%edx), %ebx +#endif + movl BP_kernel_alignment(%esi), %eax decl %eax addl %eax, %ebx notl %eax andl %eax, %ebx cmpl $LOAD_PHYSICAL_ADDR, %ebx - jge 1f + jae 1f #endif movl $LOAD_PHYSICAL_ADDR, %ebx 1: + movl %ebx, %ebp // Save the output address for later /* Target address to relocate to for decompression */ - movl BP_init_size(%esi), %eax - subl $_end, %eax - addl %eax, %ebx + addl BP_init_size(%esi), %ebx + subl $_end, %ebx /* Set up the stack */ leal boot_stack_end(%ebx), %esp @@ -128,7 +141,7 @@ SYM_FUNC_START(startup_32) * where decompression in place becomes safe. */ pushl %esi - leal (_bss-4)(%ebp), %esi + leal (_bss-4)(%edx), %esi leal (_bss-4)(%ebx), %edi movl $(_bss - startup_32), %ecx shrl $2, %ecx @@ -137,6 +150,15 @@ SYM_FUNC_START(startup_32) cld popl %esi + /* + * The GDT may get overwritten either during the copy we just did or + * during extract_kernel below. To avoid any issues, repoint the GDTR + * to the new copy of the GDT. + */ + leal gdt(%ebx), %eax + movl %eax, 2(%eax) + lgdt (%eax) + /* * Jump to the relocated address. */ @@ -148,9 +170,8 @@ SYM_FUNC_END(startup_32) SYM_FUNC_START(efi32_stub_entry) SYM_FUNC_START_ALIAS(efi_stub_entry) add $0x4, %esp + movl 8(%esp), %esi /* save boot_params pointer */ call efi_main - movl %eax, %esi - movl BP_code32_start(%esi), %eax leal startup_32(%eax), %eax jmp *%eax SYM_FUNC_END(efi32_stub_entry) @@ -189,9 +210,7 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated) /* push arguments for extract_kernel: */ pushl $z_output_len /* decompressed length, end of relocs */ - leal _end(%ebx), %eax - subl BP_init_size(%esi), %eax - pushl %eax /* output address */ + pushl %ebp /* output address */ pushl $z_input_len /* input_len */ leal input_data(%ebx), %eax @@ -209,6 +228,21 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated) jmp *%eax SYM_FUNC_END(.Lrelocated) + .data + .balign 8 +SYM_DATA_START_LOCAL(gdt) + .word gdt_end - gdt - 1 + .long 0 + .word 0 + .quad 0x0000000000000000 /* Reserved */ + .quad 0x00cf9a000000ffff /* __KERNEL_CS */ + .quad 0x00cf92000000ffff /* __KERNEL_DS */ +SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end) + +#ifdef CONFIG_EFI_STUB +SYM_DATA(image_offset, .long 0) +#endif + /* * Stack and heap for uncompression */ diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 1f1f6c8139b3..d4657d38e884 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -53,19 +53,7 @@ SYM_FUNC_START(startup_32) * all need to be under the 4G limit. */ cld - /* - * Test KEEP_SEGMENTS flag to see if the bootloader is asking - * us to not reload segments - */ - testb $KEEP_SEGMENTS, BP_loadflags(%esi) - jnz 1f - cli - movl $(__BOOT_DS), %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %ss -1: /* * Calculate the delta between where we were compiled to run @@ -80,10 +68,21 @@ SYM_FUNC_START(startup_32) 1: popl %ebp subl $1b, %ebp + /* Load new GDT with the 64bit segments using 32bit descriptor */ + leal gdt(%ebp), %eax + movl %eax, 2(%eax) + lgdt (%eax) + + /* Load segment registers with our descriptors */ + movl $__BOOT_DS, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %fs + movl %eax, %gs + movl %eax, %ss + /* setup a stack and make sure cpu supports long mode. */ - movl $boot_stack_end, %eax - addl %ebp, %eax - movl %eax, %esp + leal boot_stack_end(%ebp), %esp call verify_cpu testl %eax, %eax @@ -100,30 +99,38 @@ SYM_FUNC_START(startup_32) #ifdef CONFIG_RELOCATABLE movl %ebp, %ebx + +#ifdef CONFIG_EFI_STUB +/* + * If we were loaded via the EFI LoadImage service, startup_32 will be at an + * offset to the start of the space allocated for the image. efi_pe_entry will + * set up image_offset to tell us where the image actually starts, so that we + * can use the full available buffer. + * image_offset = startup_32 - image_base + * Otherwise image_offset will be zero and has no effect on the calculations. + */ + subl image_offset(%ebp), %ebx +#endif + movl BP_kernel_alignment(%esi), %eax decl %eax addl %eax, %ebx notl %eax andl %eax, %ebx cmpl $LOAD_PHYSICAL_ADDR, %ebx - jge 1f + jae 1f #endif movl $LOAD_PHYSICAL_ADDR, %ebx 1: /* Target address to relocate to for decompression */ - movl BP_init_size(%esi), %eax - subl $_end, %eax - addl %eax, %ebx + addl BP_init_size(%esi), %ebx + subl $_end, %ebx /* * Prepare for entering 64 bit mode */ - /* Load new GDT with the 64bit segments using 32bit descriptor */ - addl %ebp, gdt+2(%ebp) - lgdt gdt(%ebp) - /* Enable PAE mode */ movl %cr4, %eax orl $X86_CR4_PAE, %eax @@ -212,8 +219,13 @@ SYM_FUNC_START(startup_32) cmp $0, %edi jz 1f leal efi64_stub_entry(%ebp), %eax - movl %esi, %edx movl efi32_boot_args+4(%ebp), %esi + movl efi32_boot_args+8(%ebp), %edx // saved bootparams pointer + cmpl $0, %edx + jnz 1f + leal efi_pe_entry(%ebp), %eax + movl %edi, %ecx // MS calling convention + movl %esi, %edx 1: #endif pushl %eax @@ -238,11 +250,17 @@ SYM_FUNC_START(efi32_stub_entry) 1: pop %ebp subl $1b, %ebp + movl %esi, efi32_boot_args+8(%ebp) +SYM_INNER_LABEL(efi32_pe_stub_entry, SYM_L_LOCAL) movl %ecx, efi32_boot_args(%ebp) movl %edx, efi32_boot_args+4(%ebp) - sgdtl efi32_boot_gdt(%ebp) movb $0, efi_is64(%ebp) + /* Save firmware GDTR and code/data selectors */ + sgdtl efi32_boot_gdt(%ebp) + movw %cs, efi32_boot_cs(%ebp) + movw %ds, efi32_boot_ds(%ebp) + /* Disable paging */ movl %cr0, %eax btrl $X86_CR0_PG_BIT, %eax @@ -266,6 +284,9 @@ SYM_CODE_START(startup_64) * and command line. */ + cld + cli + /* Setup data segments. */ xorl %eax, %eax movl %eax, %ds @@ -290,13 +311,27 @@ SYM_CODE_START(startup_64) /* Start with the delta to where the kernel will run at. */ #ifdef CONFIG_RELOCATABLE leaq startup_32(%rip) /* - $startup_32 */, %rbp + +#ifdef CONFIG_EFI_STUB +/* + * If we were loaded via the EFI LoadImage service, startup_32 will be at an + * offset to the start of the space allocated for the image. efi_pe_entry will + * set up image_offset to tell us where the image actually starts, so that we + * can use the full available buffer. + * image_offset = startup_32 - image_base + * Otherwise image_offset will be zero and has no effect on the calculations. + */ + movl image_offset(%rip), %eax + subq %rax, %rbp +#endif + movl BP_kernel_alignment(%rsi), %eax decl %eax addq %rax, %rbp notq %rax andq %rax, %rbp cmpq $LOAD_PHYSICAL_ADDR, %rbp - jge 1f + jae 1f #endif movq $LOAD_PHYSICAL_ADDR, %rbp 1: @@ -354,9 +389,9 @@ SYM_CODE_START(startup_64) */ /* Make sure we have GDT with 32-bit code segment */ - leaq gdt(%rip), %rax - movq %rax, gdt64+2(%rip) - lgdt gdt64(%rip) + leaq gdt64(%rip), %rax + addq %rax, 2(%rax) + lgdt (%rax) /* * paging_prepare() sets up the trampoline and checks if we need to @@ -441,6 +476,16 @@ trampoline_return: cld popq %rsi + /* + * The GDT may get overwritten either during the copy we just did or + * during extract_kernel below. To avoid any issues, repoint the GDTR + * to the new copy of the GDT. + */ + leaq gdt64(%rbx), %rax + leaq gdt(%rbx), %rdx + movq %rdx, 2(%rax) + lgdt (%rax) + /* * Jump to the relocated address. */ @@ -453,9 +498,9 @@ SYM_CODE_END(startup_64) SYM_FUNC_START(efi64_stub_entry) SYM_FUNC_START_ALIAS(efi_stub_entry) and $~0xf, %rsp /* realign the stack */ + movq %rdx, %rbx /* save boot_params pointer */ call efi_main - movq %rax,%rsi - movl BP_code32_start(%esi), %eax + movq %rbx,%rsi leaq startup_64(%rax), %rax jmp *%rax SYM_FUNC_END(efi64_stub_entry) @@ -613,13 +658,13 @@ SYM_FUNC_END(.Lno_longmode) .data SYM_DATA_START_LOCAL(gdt64) - .word gdt_end - gdt - .quad 0 + .word gdt_end - gdt - 1 + .quad gdt - gdt64 SYM_DATA_END(gdt64) .balign 8 SYM_DATA_START_LOCAL(gdt) - .word gdt_end - gdt - .long gdt + .word gdt_end - gdt - 1 + .long 0 .word 0 .quad 0x00cf9a000000ffff /* __KERNEL32_CS */ .quad 0x00af9a000000ffff /* __KERNEL_CS */ @@ -628,9 +673,97 @@ SYM_DATA_START_LOCAL(gdt) .quad 0x0000000000000000 /* TS continued */ SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end) +#ifdef CONFIG_EFI_STUB +SYM_DATA(image_offset, .long 0) +#endif + #ifdef CONFIG_EFI_MIXED -SYM_DATA_LOCAL(efi32_boot_args, .long 0, 0) +SYM_DATA_LOCAL(efi32_boot_args, .long 0, 0, 0) SYM_DATA(efi_is64, .byte 1) + +#define ST32_boottime 60 // offsetof(efi_system_table_32_t, boottime) +#define BS32_handle_protocol 88 // offsetof(efi_boot_services_32_t, handle_protocol) +#define LI32_image_base 32 // offsetof(efi_loaded_image_32_t, image_base) + + .text + .code32 +SYM_FUNC_START(efi32_pe_entry) +/* + * efi_status_t efi32_pe_entry(efi_handle_t image_handle, + * efi_system_table_32_t *sys_table) + */ + + pushl %ebp + movl %esp, %ebp + pushl %eax // dummy push to allocate loaded_image + + pushl %ebx // save callee-save registers + pushl %edi + + call verify_cpu // check for long mode support + testl %eax, %eax + movl $0x80000003, %eax // EFI_UNSUPPORTED + jnz 2f + + call 1f +1: pop %ebx + subl $1b, %ebx + + /* Get the loaded image protocol pointer from the image handle */ + leal -4(%ebp), %eax + pushl %eax // &loaded_image + leal loaded_image_proto(%ebx), %eax + pushl %eax // pass the GUID address + pushl 8(%ebp) // pass the image handle + + /* + * Note the alignment of the stack frame. + * sys_table + * handle <-- 16-byte aligned on entry by ABI + * return address + * frame pointer + * loaded_image <-- local variable + * saved %ebx <-- 16-byte aligned here + * saved %edi + * &loaded_image + * &loaded_image_proto + * handle <-- 16-byte aligned for call to handle_protocol + */ + + movl 12(%ebp), %eax // sys_table + movl ST32_boottime(%eax), %eax // sys_table->boottime + call *BS32_handle_protocol(%eax) // sys_table->boottime->handle_protocol + addl $12, %esp // restore argument space + testl %eax, %eax + jnz 2f + + movl 8(%ebp), %ecx // image_handle + movl 12(%ebp), %edx // sys_table + movl -4(%ebp), %esi // loaded_image + movl LI32_image_base(%esi), %esi // loaded_image->image_base + movl %ebx, %ebp // startup_32 for efi32_pe_stub_entry + /* + * We need to set the image_offset variable here since startup_32() will + * use it before we get to the 64-bit efi_pe_entry() in C code. + */ + subl %esi, %ebx + movl %ebx, image_offset(%ebp) // save image_offset + jmp efi32_pe_stub_entry + +2: popl %edi // restore callee-save registers + popl %ebx + leave + ret +SYM_FUNC_END(efi32_pe_entry) + + .section ".rodata" + /* EFI loaded image protocol GUID */ + .balign 4 +SYM_DATA_START_LOCAL(loaded_image_proto) + .long 0x5b1b31a1 + .word 0x9562, 0x11d2 + .byte 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b +SYM_DATA_END(loaded_image_proto) #endif /* diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 97d9b6d6c1af..735ad7f21ab0 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -15,7 +15,7 @@ * hex while segment addresses are written as segment:offset. * */ - +#include <linux/pe.h> #include <asm/segment.h> #include <asm/boot.h> #include <asm/page_types.h> @@ -43,8 +43,7 @@ SYSSEG = 0x1000 /* historical load address >> 4 */ bootsect_start: #ifdef CONFIG_EFI_STUB # "MZ", MS-DOS header - .byte 0x4d - .byte 0x5a + .word MZ_MAGIC #endif # Normalize the start address @@ -97,39 +96,30 @@ bugger_off_msg: #ifdef CONFIG_EFI_STUB pe_header: - .ascii "PE" - .word 0 + .long PE_MAGIC coff_header: #ifdef CONFIG_X86_32 - .word 0x14c # i386 + .set image_file_add_flags, IMAGE_FILE_32BIT_MACHINE + .set pe_opt_magic, PE_OPT_MAGIC_PE32 + .word IMAGE_FILE_MACHINE_I386 #else - .word 0x8664 # x86-64 + .set image_file_add_flags, 0 + .set pe_opt_magic, PE_OPT_MAGIC_PE32PLUS + .word IMAGE_FILE_MACHINE_AMD64 #endif - .word 4 # nr_sections + .word section_count # nr_sections .long 0 # TimeDateStamp .long 0 # PointerToSymbolTable .long 1 # NumberOfSymbols .word section_table - optional_header # SizeOfOptionalHeader -#ifdef CONFIG_X86_32 - .word 0x306 # Characteristics. - # IMAGE_FILE_32BIT_MACHINE | - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#else - .word 0x206 # Characteristics - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#endif + .word IMAGE_FILE_EXECUTABLE_IMAGE | \ + image_file_add_flags | \ + IMAGE_FILE_DEBUG_STRIPPED | \ + IMAGE_FILE_LINE_NUMS_STRIPPED # Characteristics optional_header: -#ifdef CONFIG_X86_32 - .word 0x10b # PE32 format -#else - .word 0x20b # PE32+ format -#endif + .word pe_opt_magic .byte 0x02 # MajorLinkerVersion .byte 0x14 # MinorLinkerVersion @@ -148,17 +138,19 @@ optional_header: #endif extra_header_fields: + # PE specification requires ImageBase to be 64k aligned + .set image_base, (LOAD_PHYSICAL_ADDR + 0xffff) & ~0xffff #ifdef CONFIG_X86_32 - .long 0 # ImageBase + .long image_base # ImageBase #else - .quad 0 # ImageBase + .quad image_base # ImageBase #endif .long 0x20 # SectionAlignment .long 0x20 # FileAlignment .word 0 # MajorOperatingSystemVersion .word 0 # MinorOperatingSystemVersion - .word 0 # MajorImageVersion - .word 0 # MinorImageVersion + .word LINUX_EFISTUB_MAJOR_VERSION # MajorImageVersion + .word LINUX_EFISTUB_MINOR_VERSION # MinorImageVersion .word 0 # MajorSubsystemVersion .word 0 # MinorSubsystemVersion .long 0 # Win32VersionValue @@ -170,7 +162,7 @@ extra_header_fields: .long 0x200 # SizeOfHeaders .long 0 # CheckSum - .word 0xa # Subsystem (EFI application) + .word IMAGE_SUBSYSTEM_EFI_APPLICATION # Subsystem (EFI application) .word 0 # DllCharacteristics #ifdef CONFIG_X86_32 .long 0 # SizeOfStackReserve @@ -184,7 +176,7 @@ extra_header_fields: .quad 0 # SizeOfHeapCommit #endif .long 0 # LoaderFlags - .long 0x6 # NumberOfRvaAndSizes + .long (section_table - .) / 8 # NumberOfRvaAndSizes .quad 0 # ExportTable .quad 0 # ImportTable @@ -210,7 +202,10 @@ section_table: .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x60500020 # Characteristics (section flags) + .long IMAGE_SCN_CNT_CODE | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_EXECUTE | \ + IMAGE_SCN_ALIGN_16BYTES # Characteristics # # The EFI application loader requires a relocation section @@ -228,45 +223,53 @@ section_table: .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x42100040 # Characteristics (section flags) + .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_DISCARDABLE | \ + IMAGE_SCN_ALIGN_1BYTES # Characteristics +#ifdef CONFIG_EFI_MIXED # # The offset & size fields are filled in by build.c. # - .ascii ".text" - .byte 0 - .byte 0 - .byte 0 + .asciz ".compat" .long 0 - .long 0x0 # startup_{32,64} + .long 0x0 .long 0 # Size of initialized data # on disk - .long 0x0 # startup_{32,64} + .long 0x0 .long 0 # PointerToRelocations .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x60500020 # Characteristics (section flags) + .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_DISCARDABLE | \ + IMAGE_SCN_ALIGN_1BYTES # Characteristics +#endif # # The offset & size fields are filled in by build.c. # - .ascii ".bss" - .byte 0 + .ascii ".text" .byte 0 .byte 0 .byte 0 .long 0 - .long 0x0 + .long 0x0 # startup_{32,64} .long 0 # Size of initialized data # on disk - .long 0x0 + .long 0x0 # startup_{32,64} .long 0 # PointerToRelocations .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0xc8000080 # Characteristics (section flags) + .long IMAGE_SCN_CNT_CODE | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_EXECUTE | \ + IMAGE_SCN_ALIGN_16BYTES # Characteristics + .set section_count, (. - section_table) / 40 #endif /* CONFIG_EFI_STUB */ # Kernel attributes; used by setup. This is part 1 of the diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index 55e669d29e54..8f8c8e386cea 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -53,11 +53,20 @@ u8 buf[SETUP_SECT_MAX*512]; #define PECOFF_RELOC_RESERVE 0x20 +#ifdef CONFIG_EFI_MIXED +#define PECOFF_COMPAT_RESERVE 0x20 +#else +#define PECOFF_COMPAT_RESERVE 0x0 +#endif + unsigned long efi32_stub_entry; unsigned long efi64_stub_entry; unsigned long efi_pe_entry; +unsigned long efi32_pe_entry; unsigned long kernel_info; unsigned long startup_64; +unsigned long _ehead; +unsigned long _end; /*----------------------------------------------------------------------*/ @@ -189,7 +198,10 @@ static void update_pecoff_section_header(char *section_name, u32 offset, u32 siz static void update_pecoff_setup_and_reloc(unsigned int size) { u32 setup_offset = 0x200; - u32 reloc_offset = size - PECOFF_RELOC_RESERVE; + u32 reloc_offset = size - PECOFF_RELOC_RESERVE - PECOFF_COMPAT_RESERVE; +#ifdef CONFIG_EFI_MIXED + u32 compat_offset = reloc_offset + PECOFF_RELOC_RESERVE; +#endif u32 setup_size = reloc_offset - setup_offset; update_pecoff_section_header(".setup", setup_offset, setup_size); @@ -201,43 +213,59 @@ static void update_pecoff_setup_and_reloc(unsigned int size) */ put_unaligned_le32(reloc_offset + 10, &buf[reloc_offset]); put_unaligned_le32(10, &buf[reloc_offset + 4]); + +#ifdef CONFIG_EFI_MIXED + update_pecoff_section_header(".compat", compat_offset, PECOFF_COMPAT_RESERVE); + + /* + * Put the IA-32 machine type (0x14c) and the associated entry point + * address in the .compat section, so loaders can figure out which other + * execution modes this image supports. + */ + buf[compat_offset] = 0x1; + buf[compat_offset + 1] = 0x8; + put_unaligned_le16(0x14c, &buf[compat_offset + 2]); + put_unaligned_le32(efi32_pe_entry + size, &buf[compat_offset + 4]); +#endif } -static void update_pecoff_text(unsigned int text_start, unsigned int file_sz) +static void update_pecoff_text(unsigned int text_start, unsigned int file_sz, + unsigned int init_sz) { unsigned int pe_header; unsigned int text_sz = file_sz - text_start; + unsigned int bss_sz = init_sz - file_sz; pe_header = get_unaligned_le32(&buf[0x3c]); /* + * The PE/COFF loader may load the image at an address which is + * misaligned with respect to the kernel_alignment field in the setup + * header. + * + * In order to avoid relocating the kernel to correct the misalignment, + * add slack to allow the buffer to be aligned within the declared size + * of the image. + */ + bss_sz += CONFIG_PHYSICAL_ALIGN; + init_sz += CONFIG_PHYSICAL_ALIGN; + + /* * Size of code: Subtract the size of the first sector (512 bytes) * which includes the header. */ - put_unaligned_le32(file_sz - 512, &buf[pe_header + 0x1c]); + put_unaligned_le32(file_sz - 512 + bss_sz, &buf[pe_header + 0x1c]); + + /* Size of image */ + put_unaligned_le32(init_sz, &buf[pe_header + 0x50]); /* * Address of entry point for PE/COFF executable */ put_unaligned_le32(text_start + efi_pe_entry, &buf[pe_header + 0x28]); - update_pecoff_section_header(".text", text_start, text_sz); -} - -static void update_pecoff_bss(unsigned int file_sz, unsigned int init_sz) -{ - unsigned int pe_header; - unsigned int bss_sz = init_sz - file_sz; - - pe_header = get_unaligned_le32(&buf[0x3c]); - - /* Size of uninitialized data */ - put_unaligned_le32(bss_sz, &buf[pe_header + 0x24]); - - /* Size of image */ - put_unaligned_le32(init_sz, &buf[pe_header + 0x50]); - - update_pecoff_section_header_fields(".bss", file_sz, bss_sz, 0, 0); + update_pecoff_section_header_fields(".text", text_start, text_sz + bss_sz, + text_sz, text_start); } static int reserve_pecoff_reloc_section(int c) @@ -278,9 +306,8 @@ static void efi_stub_entry_update(void) static inline void update_pecoff_setup_and_reloc(unsigned int size) {} static inline void update_pecoff_text(unsigned int text_start, - unsigned int file_sz) {} -static inline void update_pecoff_bss(unsigned int file_sz, - unsigned int init_sz) {} + unsigned int file_sz, + unsigned int init_sz) {} static inline void efi_stub_defaults(void) {} static inline void efi_stub_entry_update(void) {} @@ -290,6 +317,12 @@ static inline int reserve_pecoff_reloc_section(int c) } #endif /* CONFIG_EFI_STUB */ +static int reserve_pecoff_compat_section(int c) +{ + /* Reserve 0x20 bytes for .compat section */ + memset(buf+c, 0, PECOFF_COMPAT_RESERVE); + return PECOFF_COMPAT_RESERVE; +} /* * Parse zoffset.h and find the entry points. We could just #include zoffset.h @@ -322,8 +355,11 @@ static void parse_zoffset(char *fname) PARSE_ZOFS(p, efi32_stub_entry); PARSE_ZOFS(p, efi64_stub_entry); PARSE_ZOFS(p, efi_pe_entry); + PARSE_ZOFS(p, efi32_pe_entry); PARSE_ZOFS(p, kernel_info); PARSE_ZOFS(p, startup_64); + PARSE_ZOFS(p, _ehead); + PARSE_ZOFS(p, _end); p = strchr(p, '\n'); while (p && (*p == '\r' || *p == '\n')) @@ -365,6 +401,7 @@ int main(int argc, char ** argv) die("Boot block hasn't got boot flag (0xAA55)"); fclose(file); + c += reserve_pecoff_compat_section(c); c += reserve_pecoff_reloc_section(c); /* Pad unused space with zeros */ @@ -406,9 +443,28 @@ int main(int argc, char ** argv) buf[0x1f1] = setup_sectors-1; put_unaligned_le32(sys_size, &buf[0x1f4]); - update_pecoff_text(setup_sectors * 512, i + (sys_size * 16)); init_sz = get_unaligned_le32(&buf[0x260]); - update_pecoff_bss(i + (sys_size * 16), init_sz); +#ifdef CONFIG_EFI_STUB + /* + * The decompression buffer will start at ImageBase. When relocating + * the compressed kernel to its end, we must ensure that the head + * section does not get overwritten. The head section occupies + * [i, i + _ehead), and the destination is [init_sz - _end, init_sz). + * + * At present these should never overlap, because 'i' is at most 32k + * because of SETUP_SECT_MAX, '_ehead' is less than 1k, and the + * calculation of INIT_SIZE in boot/header.S ensures that + * 'init_sz - _end' is at least 64k. + * + * For future-proofing, increase init_sz if necessary. + */ + + if (init_sz - _end < i + _ehead) { + init_sz = (i + _ehead + _end + 4095) & ~4095; + put_unaligned_le32(init_sz, &buf[0x260]); + } +#endif + update_pecoff_text(setup_sectors * 512, i + (sys_size * 16), init_sz); efi_stub_entry_update(); diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 86169a24b0d8..cdcf48d52a12 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -10,6 +10,8 @@ #include <asm/mmu_context.h> #include <linux/build_bug.h> +extern unsigned long efi_fw_vendor, efi_config_table; + /* * We map the EFI regions needed for runtime services non-contiguously, * with preserved alignment on virtual addresses starting from -4G down @@ -34,8 +36,6 @@ static inline bool efi_have_uv1_memmap(void) #define EFI32_LOADER_SIGNATURE "EL32" #define EFI64_LOADER_SIGNATURE "EL64" -#define MAX_CMDLINE_ADDRESS UINT_MAX - #define ARCH_EFI_IRQ_FLAGS_MASK X86_EFLAGS_IF /* @@ -180,7 +180,6 @@ extern void __init efi_uv1_memmap_phys_epilog(pgd_t *save_pgd); struct efi_setup_data { u64 fw_vendor; - u64 runtime; u64 tables; u64 smbios; u64 reserved[8]; @@ -219,7 +218,8 @@ extern void efi_thunk_runtime_setup(void); efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size, unsigned long descriptor_size, u32 descriptor_version, - efi_memory_desc_t *virtual_map); + efi_memory_desc_t *virtual_map, + unsigned long systab_phys); /* arch specific definitions used by the stub code */ @@ -270,6 +270,11 @@ static inline void *efi64_zero_upper(void *p) return p; } +static inline u32 efi64_convert_status(efi_status_t status) +{ + return (u32)(status | (u64)status >> 32); +} + #define __efi64_argmap_free_pages(addr, size) \ ((addr), 0, (size)) @@ -285,11 +290,21 @@ static inline void *efi64_zero_upper(void *p) #define __efi64_argmap_locate_protocol(protocol, reg, interface) \ ((protocol), (reg), efi64_zero_upper(interface)) +#define __efi64_argmap_locate_device_path(protocol, path, handle) \ + ((protocol), (path), efi64_zero_upper(handle)) + +#define __efi64_argmap_exit(handle, status, size, data) \ + ((handle), efi64_convert_status(status), (size), (data)) + /* PCI I/O */ #define __efi64_argmap_get_location(protocol, seg, bus, dev, func) \ ((protocol), efi64_zero_upper(seg), efi64_zero_upper(bus), \ efi64_zero_upper(dev), efi64_zero_upper(func)) +/* LoadFile */ +#define __efi64_argmap_load_file(protocol, path, policy, bufsize, buf) \ + ((protocol), (path), (policy), efi64_zero_upper(bufsize), (buf)) + /* * The macros below handle the plumbing for the argument mapping. To add a * mapping for a specific EFI method, simply define a macro diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c index 5c7ee3df4d0b..3ca07ad552ae 100644 --- a/arch/x86/kernel/asm-offsets.c +++ b/arch/x86/kernel/asm-offsets.c @@ -88,7 +88,6 @@ static void __used common(void) OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment); OFFSET(BP_init_size, boot_params, hdr.init_size); OFFSET(BP_pref_address, boot_params, hdr.pref_address); - OFFSET(BP_code32_start, boot_params, hdr.code32_start); BLANK(); DEFINE(PTREGS_SIZE, sizeof(struct pt_regs)); diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index 82826f2275cc..2b4256ebe86e 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -3,6 +3,8 @@ # error "Please do not build this file directly, build asm-offsets.c instead" #endif +#include <linux/efi.h> + #include <asm/ucontext.h> #define __SYSCALL_I386(nr, sym, qual) [nr] = 1, @@ -64,4 +66,7 @@ void foo(void) BLANK(); DEFINE(__NR_syscall_max, sizeof(syscalls) - 1); DEFINE(NR_syscalls, sizeof(syscalls)); + + BLANK(); + DEFINE(EFI_svam, offsetof(efi_runtime_services_t, set_virtual_address_map)); } diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 3923ab4630d7..f66a6b90f954 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -67,11 +67,6 @@ __HEAD SYM_CODE_START(startup_32) movl pa(initial_stack),%ecx - /* test KEEP_SEGMENTS flag to see if the bootloader is asking - us to not reload segments */ - testb $KEEP_SEGMENTS, BP_loadflags(%esi) - jnz 2f - /* * Set segments to known values. */ @@ -82,7 +77,6 @@ SYM_CODE_START(startup_32) movl %eax,%fs movl %eax,%gs movl %eax,%ss -2: leal -__PAGE_OFFSET(%ecx),%esp /* diff --git a/arch/x86/kernel/ima_arch.c b/arch/x86/kernel/ima_arch.c index 23054909c8dd..7dfb1e808928 100644 --- a/arch/x86/kernel/ima_arch.c +++ b/arch/x86/kernel/ima_arch.c @@ -17,7 +17,7 @@ static enum efi_secureboot_mode get_sb_mode(void) size = sizeof(secboot); - if (!efi_enabled(EFI_RUNTIME_SERVICES)) { + if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) { pr_info("ima: secureboot mode unknown, no efi\n"); return efi_secureboot_mode_unknown; } diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index f293d872602a..db6578d45157 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -141,9 +141,8 @@ prepare_add_efi_setup_data(struct boot_params *params, struct setup_data *sd = (void *)params + efi_setup_data_offset; struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data); - esd->fw_vendor = efi.fw_vendor; - esd->runtime = efi.runtime; - esd->tables = efi.config_table; + esd->fw_vendor = efi_fw_vendor; + esd->tables = efi_config_table; esd->smbios = efi.smbios; sd->type = SETUP_EFI; diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index a4ea04603af3..1aae5302501d 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -54,10 +54,16 @@ #include <asm/x86_init.h> #include <asm/uv/uv.h> -static efi_system_table_t efi_systab __initdata; -static u64 efi_systab_phys __initdata; +static unsigned long efi_systab_phys __initdata; +static unsigned long prop_phys = EFI_INVALID_TABLE_ADDR; +static unsigned long uga_phys = EFI_INVALID_TABLE_ADDR; +static unsigned long efi_runtime, efi_nr_tables; -static efi_config_table_type_t arch_tables[] __initdata = { +unsigned long efi_fw_vendor, efi_config_table; + +static const efi_config_table_type_t arch_tables[] __initconst = { + {EFI_PROPERTIES_TABLE_GUID, "PROP", &prop_phys}, + {UGA_IO_PROTOCOL_GUID, "UGA", &uga_phys}, #ifdef CONFIG_X86_UV {UV_SYSTEM_TABLE_GUID, "UVsystab", &uv_systab_phys}, #endif @@ -65,26 +71,26 @@ static efi_config_table_type_t arch_tables[] __initdata = { }; static const unsigned long * const efi_tables[] = { - &efi.mps, &efi.acpi, &efi.acpi20, &efi.smbios, &efi.smbios3, - &efi.boot_info, - &efi.hcdp, - &efi.uga, + &uga_phys, #ifdef CONFIG_X86_UV &uv_systab_phys, #endif - &efi.fw_vendor, - &efi.runtime, - &efi.config_table, + &efi_fw_vendor, + &efi_runtime, + &efi_config_table, &efi.esrt, - &efi.properties_table, - &efi.mem_attr_table, + &prop_phys, + &efi_mem_attr_table, #ifdef CONFIG_EFI_RCI2_TABLE &rci2_table_phys, #endif + &efi.tpm_log, + &efi.tpm_final_log, + &efi_rng_seed, }; u64 efi_setup; /* efi setup_data physical address */ @@ -214,16 +220,13 @@ int __init efi_memblock_x86_reserve_range(void) if (efi_enabled(EFI_PARAVIRT)) return 0; -#ifdef CONFIG_X86_32 - /* Can't handle data above 4GB at this time */ - if (e->efi_memmap_hi) { + /* Can't handle firmware tables above 4GB on i386 */ + if (IS_ENABLED(CONFIG_X86_32) && e->efi_memmap_hi > 0) { pr_err("Memory map is above 4GB, disabling EFI.\n"); return -EINVAL; } - pmap = e->efi_memmap; -#else - pmap = (e->efi_memmap | ((__u64)e->efi_memmap_hi << 32)); -#endif + pmap = (phys_addr_t)(e->efi_memmap | ((u64)e->efi_memmap_hi << 32)); + data.phys_map = pmap; data.size = e->efi_memmap_size; data.desc_size = e->efi_memdesc_size; @@ -306,11 +309,11 @@ static void __init efi_clean_memmap(void) if (n_removal > 0) { struct efi_memory_map_data data = { - .phys_map = efi.memmap.phys_map, - .desc_version = efi.memmap.desc_version, - .desc_size = efi.memmap.desc_size, - .size = efi.memmap.desc_size * (efi.memmap.nr_map - n_removal), - .flags = 0, + .phys_map = efi.memmap.phys_map, + .desc_version = efi.memmap.desc_version, + .desc_size = efi.memmap.desc_size, + .size = efi.memmap.desc_size * (efi.memmap.nr_map - n_removal), + .flags = 0, }; pr_warn("Removing %d invalid memory map entries.\n", n_removal); @@ -334,43 +337,32 @@ void __init efi_print_memmap(void) } } -static int __init efi_systab_init(u64 phys) +static int __init efi_systab_init(unsigned long phys) { int size = efi_enabled(EFI_64BIT) ? sizeof(efi_system_table_64_t) : sizeof(efi_system_table_32_t); + const efi_table_hdr_t *hdr; bool over4g = false; void *p; + int ret; - p = early_memremap_ro(phys, size); + hdr = p = early_memremap_ro(phys, size); if (p == NULL) { pr_err("Couldn't map the system table!\n"); return -ENOMEM; } + ret = efi_systab_check_header(hdr, 1); + if (ret) { + early_memunmap(p, size); + return ret; + } + if (efi_enabled(EFI_64BIT)) { const efi_system_table_64_t *systab64 = p; - efi_systab.hdr = systab64->hdr; - efi_systab.fw_vendor = systab64->fw_vendor; - efi_systab.fw_revision = systab64->fw_revision; - efi_systab.con_in_handle = systab64->con_in_handle; - efi_systab.con_in = systab64->con_in; - efi_systab.con_out_handle = systab64->con_out_handle; - efi_systab.con_out = (void *)(unsigned long)systab64->con_out; - efi_systab.stderr_handle = systab64->stderr_handle; - efi_systab.stderr = systab64->stderr; - efi_systab.runtime = (void *)(unsigned long)systab64->runtime; - efi_systab.boottime = (void *)(unsigned long)systab64->boottime; - efi_systab.nr_tables = systab64->nr_tables; - efi_systab.tables = systab64->tables; - - over4g = systab64->con_in_handle > U32_MAX || - systab64->con_in > U32_MAX || - systab64->con_out_handle > U32_MAX || - systab64->con_out > U32_MAX || - systab64->stderr_handle > U32_MAX || - systab64->stderr > U32_MAX || - systab64->boottime > U32_MAX; + efi_runtime = systab64->runtime; + over4g = systab64->runtime > U32_MAX; if (efi_setup) { struct efi_setup_data *data; @@ -381,38 +373,33 @@ static int __init efi_systab_init(u64 phys) return -ENOMEM; } - efi_systab.fw_vendor = (unsigned long)data->fw_vendor; - efi_systab.runtime = (void *)(unsigned long)data->runtime; - efi_systab.tables = (unsigned long)data->tables; + efi_fw_vendor = (unsigned long)data->fw_vendor; + efi_config_table = (unsigned long)data->tables; over4g |= data->fw_vendor > U32_MAX || - data->runtime > U32_MAX || data->tables > U32_MAX; early_memunmap(data, sizeof(*data)); } else { + efi_fw_vendor = systab64->fw_vendor; + efi_config_table = systab64->tables; + over4g |= systab64->fw_vendor > U32_MAX || - systab64->runtime > U32_MAX || systab64->tables > U32_MAX; } + efi_nr_tables = systab64->nr_tables; } else { const efi_system_table_32_t *systab32 = p; - efi_systab.hdr = systab32->hdr; - efi_systab.fw_vendor = systab32->fw_vendor; - efi_systab.fw_revision = systab32->fw_revision; - efi_systab.con_in_handle = systab32->con_in_handle; - efi_systab.con_in = systab32->con_in; - efi_systab.con_out_handle = systab32->con_out_handle; - efi_systab.con_out = (void *)(unsigned long)systab32->con_out; - efi_systab.stderr_handle = systab32->stderr_handle; - efi_systab.stderr = systab32->stderr; - efi_systab.runtime = (void *)(unsigned long)systab32->runtime; - efi_systab.boottime = (void *)(unsigned long)systab32->boottime; - efi_systab.nr_tables = systab32->nr_tables; - efi_systab.tables = systab32->tables; + efi_fw_vendor = systab32->fw_vendor; + efi_runtime = systab32->runtime; + efi_config_table = systab32->tables; + efi_nr_tables = systab32->nr_tables; } + efi.runtime_version = hdr->revision; + + efi_systab_report_header(hdr, efi_fw_vendor); early_memunmap(p, size); if (IS_ENABLED(CONFIG_X86_32) && over4g) { @@ -420,29 +407,40 @@ static int __init efi_systab_init(u64 phys) return -EINVAL; } - efi.systab = &efi_systab; + return 0; +} + +static int __init efi_config_init(const efi_config_table_type_t *arch_tables) +{ + void *config_tables; + int sz, ret; + + if (efi_nr_tables == 0) + return 0; + + if (efi_enabled(EFI_64BIT)) + sz = sizeof(efi_config_table_64_t); + else + sz = sizeof(efi_config_table_32_t); /* - * Verify the EFI Table + * Let's see what config tables the firmware passed to us. */ - if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) { - pr_err("System table signature incorrect!\n"); - return -EINVAL; + config_tables = early_memremap(efi_config_table, efi_nr_tables * sz); + if (config_tables == NULL) { + pr_err("Could not map Configuration table!\n"); + return -ENOMEM; } - if ((efi.systab->hdr.revision >> 16) == 0) - pr_err("Warning: System table version %d.%02d, expected 1.00 or greater!\n", - efi.systab->hdr.revision >> 16, - efi.systab->hdr.revision & 0xffff); - return 0; + ret = efi_config_parse_tables(config_tables, efi_nr_tables, + arch_tables); + + early_memunmap(config_tables, efi_nr_tables * sz); + return ret; } void __init efi_init(void) { - efi_char16_t *c16; - char vendor[100] = "unknown"; - int i = 0; - if (IS_ENABLED(CONFIG_X86_32) && (boot_params.efi_info.efi_systab_hi || boot_params.efi_info.efi_memmap_hi)) { @@ -456,29 +454,7 @@ void __init efi_init(void) if (efi_systab_init(efi_systab_phys)) return; - efi.config_table = (unsigned long)efi.systab->tables; - efi.fw_vendor = (unsigned long)efi.systab->fw_vendor; - efi.runtime = (unsigned long)efi.systab->runtime; - - /* - * Show what we know for posterity - */ - c16 = early_memremap_ro(efi.systab->fw_vendor, - sizeof(vendor) * sizeof(efi_char16_t)); - if (c16) { - for (i = 0; i < sizeof(vendor) - 1 && c16[i]; ++i) - vendor[i] = c16[i]; - vendor[i] = '\0'; - early_memunmap(c16, sizeof(vendor) * sizeof(efi_char16_t)); - } else { - pr_err("Could not map the firmware vendor!\n"); - } - - pr_info("EFI v%u.%.02u by %s\n", - efi.systab->hdr.revision >> 16, - efi.systab->hdr.revision & 0xffff, vendor); - - if (efi_reuse_config(efi.systab->tables, efi.systab->nr_tables)) + if (efi_reuse_config(efi_config_table, efi_nr_tables)) return; if (efi_config_init(arch_tables)) @@ -497,6 +473,22 @@ void __init efi_init(void) return; } + /* Parse the EFI Properties table if it exists */ + if (prop_phys != EFI_INVALID_TABLE_ADDR) { + efi_properties_table_t *tbl; + + tbl = early_memremap_ro(prop_phys, sizeof(*tbl)); + if (tbl == NULL) { + pr_err("Could not map Properties table!\n"); + } else { + if (tbl->memory_protection_attribute & + EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) + set_bit(EFI_NX_PE_DATA, &efi.flags); + + early_memunmap(tbl, sizeof(*tbl)); + } + } + set_bit(EFI_RUNTIME_SERVICES, &efi.flags); efi_clean_memmap(); @@ -603,20 +595,6 @@ static void __init efi_merge_regions(void) } } -static void __init get_systab_virt_addr(efi_memory_desc_t *md) -{ - unsigned long size; - u64 end, systab; - - size = md->num_pages << EFI_PAGE_SHIFT; - end = md->phys_addr + size; - systab = efi_systab_phys; - if (md->phys_addr <= systab && systab < end) { - systab += md->virt_addr - md->phys_addr; - efi.systab = (efi_system_table_t *)(unsigned long)systab; - } -} - static void *realloc_pages(void *old_memmap, int old_shift) { void *ret; @@ -772,7 +750,6 @@ static void * __init efi_map_regions(int *count, int *pg_shift) continue; efi_map_region(md); - get_systab_virt_addr(md); if (left < desc_size) { new_memmap = realloc_pages(new_memmap, *pg_shift); @@ -798,8 +775,6 @@ static void __init kexec_enter_virtual_mode(void) efi_memory_desc_t *md; unsigned int num_pages; - efi.systab = NULL; - /* * We don't do virtual mode, since we don't do runtime services, on * non-native EFI. With the UV1 memmap, we don't do runtime services in @@ -822,10 +797,8 @@ static void __init kexec_enter_virtual_mode(void) * Map efi regions which were passed via setup_data. The virt_addr is a * fixed addr which was used in first kernel of a kexec boot. */ - for_each_efi_memory_desc(md) { + for_each_efi_memory_desc(md) efi_map_region_fixed(md); /* FIXME: add error handling */ - get_systab_virt_addr(md); - } /* * Unregister the early EFI memmap from efi_init() and install @@ -840,8 +813,6 @@ static void __init kexec_enter_virtual_mode(void) return; } - BUG_ON(!efi.systab); - num_pages = ALIGN(efi.memmap.nr_map * efi.memmap.desc_size, PAGE_SIZE); num_pages >>= PAGE_SHIFT; @@ -851,15 +822,6 @@ static void __init kexec_enter_virtual_mode(void) } efi_sync_low_kernel_mappings(); - - /* - * Now that EFI is in virtual mode, update the function - * pointers in the runtime service table to the new virtual addresses. - * - * Call EFI services through wrapper functions. - */ - efi.runtime_version = efi_systab.hdr.revision; - efi_native_runtime_setup(); #endif } @@ -893,8 +855,6 @@ static void __init __efi_enter_virtual_mode(void) efi_status_t status; unsigned long pa; - efi.systab = NULL; - if (efi_alloc_page_tables()) { pr_err("Failed to allocate EFI page tables\n"); goto err; @@ -926,9 +886,6 @@ static void __init __efi_enter_virtual_mode(void) efi_print_memmap(); } - if (WARN_ON(!efi.systab)) - goto err; - if (efi_setup_page_tables(pa, 1 << pg_shift)) goto err; @@ -937,7 +894,8 @@ static void __init __efi_enter_virtual_mode(void) status = efi_set_virtual_address_map(efi.memmap.desc_size * count, efi.memmap.desc_size, efi.memmap.desc_version, - (efi_memory_desc_t *)pa); + (efi_memory_desc_t *)pa, + efi_systab_phys); if (status != EFI_SUCCESS) { pr_err("Unable to switch EFI into virtual mode (status=%lx)!\n", status); @@ -947,14 +905,6 @@ static void __init __efi_enter_virtual_mode(void) efi_check_for_embedded_firmwares(); efi_free_boot_services(); - /* - * Now that EFI is in virtual mode, update the function - * pointers in the runtime service table to the new virtual addresses. - * - * Call EFI services through wrapper functions. - */ - efi.runtime_version = efi_systab.hdr.revision; - if (!efi_is_mixed()) efi_native_runtime_setup(); else @@ -980,6 +930,8 @@ void __init efi_enter_virtual_mode(void) if (efi_enabled(EFI_PARAVIRT)) return; + efi.runtime = (efi_runtime_services_t *)efi_runtime; + if (efi_setup) kexec_enter_virtual_mode(); else @@ -1001,3 +953,43 @@ bool efi_is_table_address(unsigned long phys_addr) return false; } + +char *efi_systab_show_arch(char *str) +{ + if (uga_phys != EFI_INVALID_TABLE_ADDR) + str += sprintf(str, "UGA=0x%lx\n", uga_phys); + return str; +} + +#define EFI_FIELD(var) efi_ ## var + +#define EFI_ATTR_SHOW(name) \ +static ssize_t name##_show(struct kobject *kobj, \ + struct kobj_attribute *attr, char *buf) \ +{ \ + return sprintf(buf, "0x%lx\n", EFI_FIELD(name)); \ +} + +EFI_ATTR_SHOW(fw_vendor); +EFI_ATTR_SHOW(runtime); +EFI_ATTR_SHOW(config_table); + +struct kobj_attribute efi_attr_fw_vendor = __ATTR_RO(fw_vendor); +struct kobj_attribute efi_attr_runtime = __ATTR_RO(runtime); +struct kobj_attribute efi_attr_config_table = __ATTR_RO(config_table); + +umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) +{ + if (attr == &efi_attr_fw_vendor.attr) { + if (efi_enabled(EFI_PARAVIRT) || + efi_fw_vendor == EFI_INVALID_TABLE_ADDR) + return 0; + } else if (attr == &efi_attr_runtime.attr) { + if (efi_runtime == EFI_INVALID_TABLE_ADDR) + return 0; + } else if (attr == &efi_attr_config_table.attr) { + if (efi_config_table == EFI_INVALID_TABLE_ADDR) + return 0; + } + return attr->mode; +} diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c index 081d466002c9..c049c432745d 100644 --- a/arch/x86/platform/efi/efi_32.c +++ b/arch/x86/platform/efi/efi_32.c @@ -66,14 +66,16 @@ void __init efi_map_region(efi_memory_desc_t *md) void __init efi_map_region_fixed(efi_memory_desc_t *md) {} void __init parse_efi_setup(u64 phys_addr, u32 data_len) {} -efi_status_t efi_call_svam(efi_set_virtual_address_map_t *__efiapi *, - u32, u32, u32, void *); +efi_status_t efi_call_svam(efi_runtime_services_t * const *, + u32, u32, u32, void *, u32); efi_status_t __init efi_set_virtual_address_map(unsigned long memory_map_size, unsigned long descriptor_size, u32 descriptor_version, - efi_memory_desc_t *virtual_map) + efi_memory_desc_t *virtual_map, + unsigned long systab_phys) { + const efi_system_table_t *systab = (efi_system_table_t *)systab_phys; struct desc_ptr gdt_descr; efi_status_t status; unsigned long flags; @@ -90,9 +92,10 @@ efi_status_t __init efi_set_virtual_address_map(unsigned long memory_map_size, /* Disable interrupts around EFI calls: */ local_irq_save(flags); - status = efi_call_svam(&efi.systab->runtime->set_virtual_address_map, + status = efi_call_svam(&systab->runtime, memory_map_size, descriptor_size, - descriptor_version, virtual_map); + descriptor_version, virtual_map, + __pa(&efi.runtime)); local_irq_restore(flags); load_fixmap_gdt(0); diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index d19a2edd63cb..211bb9358b73 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -497,12 +497,9 @@ static DEFINE_SPINLOCK(efi_runtime_lock); */ #define __efi_thunk(func, ...) \ ({ \ - efi_runtime_services_32_t *__rt; \ unsigned short __ds, __es; \ efi_status_t ____s; \ \ - __rt = (void *)(unsigned long)efi.systab->mixed_mode.runtime; \ - \ savesegment(ds, __ds); \ savesegment(es, __es); \ \ @@ -510,7 +507,7 @@ static DEFINE_SPINLOCK(efi_runtime_lock); loadsegment(ds, __KERNEL_DS); \ loadsegment(es, __KERNEL_DS); \ \ - ____s = efi64_thunk(__rt->func, __VA_ARGS__); \ + ____s = efi64_thunk(efi.runtime->mixed_mode.func, __VA_ARGS__); \ \ loadsegment(ds, __ds); \ loadsegment(es, __es); \ @@ -839,8 +836,10 @@ efi_status_t __init __no_sanitize_address efi_set_virtual_address_map(unsigned long memory_map_size, unsigned long descriptor_size, u32 descriptor_version, - efi_memory_desc_t *virtual_map) + efi_memory_desc_t *virtual_map, + unsigned long systab_phys) { + const efi_system_table_t *systab = (efi_system_table_t *)systab_phys; efi_status_t status; unsigned long flags; pgd_t *save_pgd = NULL; @@ -863,13 +862,16 @@ efi_set_virtual_address_map(unsigned long memory_map_size, /* Disable interrupts around EFI calls: */ local_irq_save(flags); - status = efi_call(efi.systab->runtime->set_virtual_address_map, + status = efi_call(efi.runtime->set_virtual_address_map, memory_map_size, descriptor_size, descriptor_version, virtual_map); local_irq_restore(flags); kernel_fpu_end(); + /* grab the virtually remapped EFI runtime services table pointer */ + efi.runtime = READ_ONCE(systab->runtime); + if (save_pgd) efi_uv1_memmap_phys_epilog(save_pgd); else diff --git a/arch/x86/platform/efi/efi_stub_32.S b/arch/x86/platform/efi/efi_stub_32.S index 75c46e7a809f..09ec84f6ef51 100644 --- a/arch/x86/platform/efi/efi_stub_32.S +++ b/arch/x86/platform/efi/efi_stub_32.S @@ -8,14 +8,20 @@ #include <linux/linkage.h> #include <linux/init.h> +#include <asm/asm-offsets.h> #include <asm/page_types.h> __INIT SYM_FUNC_START(efi_call_svam) - push 8(%esp) - push 8(%esp) + push %ebp + movl %esp, %ebp + push %ebx + + push 16(%esp) + push 16(%esp) push %ecx push %edx + movl %eax, %ebx // &systab_phys->runtime /* * Switch to the flat mapped alias of this routine, by jumping to the @@ -35,15 +41,20 @@ SYM_FUNC_START(efi_call_svam) subl $__PAGE_OFFSET, %esp /* call the EFI routine */ - call *(%eax) + movl (%eax), %eax + call *EFI_svam(%eax) - /* convert ESP back to a kernel VA, and pop the outgoing args */ - addl $__PAGE_OFFSET + 16, %esp + /* grab the virtually remapped EFI runtime services table pointer */ + movl (%ebx), %ecx + movl 36(%esp), %edx // &efi.runtime + movl %ecx, (%edx) /* re-enable paging */ movl %cr0, %edx orl $0x80000000, %edx movl %edx, %cr0 + movl 16(%esp), %ebx + leave ret SYM_FUNC_END(efi_call_svam) diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index bada1037b711..ce82f497ac67 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -541,7 +541,7 @@ int __init efi_reuse_config(u64 tables, int nr_tables) goto out_memremap; } - for (i = 0; i < efi.systab->nr_tables; i++) { + for (i = 0; i < nr_tables; i++) { efi_guid_t guid; guid = ((efi_config_table_64_t *)p)->guid; |