mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 14:32:56 +07:00
055042bedd
efi_parse_options can fail if it is unable to allocate space for a copy of the command line. Check the return value to make sure it succeeded. Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Link: https://lore.kernel.org/r/20200430182843.2510180-12-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
815 lines
21 KiB
C
815 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* -----------------------------------------------------------------------
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*
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* Copyright 2011 Intel Corporation; author Matt Fleming
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*
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* ----------------------------------------------------------------------- */
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#include <linux/efi.h>
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#include <linux/pci.h>
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#include <asm/efi.h>
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#include <asm/e820/types.h>
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#include <asm/setup.h>
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#include <asm/desc.h>
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#include <asm/boot.h>
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#include "efistub.h"
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/* Maximum physical address for 64-bit kernel with 4-level paging */
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#define MAXMEM_X86_64_4LEVEL (1ull << 46)
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const efi_system_table_t *efi_system_table;
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extern u32 image_offset;
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static efi_loaded_image_t *image = NULL;
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static efi_status_t
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preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
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{
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struct pci_setup_rom *rom = NULL;
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efi_status_t status;
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unsigned long size;
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uint64_t romsize;
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void *romimage;
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/*
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* Some firmware images contain EFI function pointers at the place where
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* the romimage and romsize fields are supposed to be. Typically the EFI
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* code is mapped at high addresses, translating to an unrealistically
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* large romsize. The UEFI spec limits the size of option ROMs to 16
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* MiB so we reject any ROMs over 16 MiB in size to catch this.
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*/
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romimage = efi_table_attr(pci, romimage);
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romsize = efi_table_attr(pci, romsize);
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if (!romimage || !romsize || romsize > SZ_16M)
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return EFI_INVALID_PARAMETER;
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size = romsize + sizeof(*rom);
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
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(void **)&rom);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to allocate memory for 'rom'\n");
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return status;
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}
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memset(rom, 0, sizeof(*rom));
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rom->data.type = SETUP_PCI;
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rom->data.len = size - sizeof(struct setup_data);
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rom->data.next = 0;
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rom->pcilen = pci->romsize;
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*__rom = rom;
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status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
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PCI_VENDOR_ID, 1, &rom->vendor);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to read rom->vendor\n");
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goto free_struct;
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}
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status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16,
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PCI_DEVICE_ID, 1, &rom->devid);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to read rom->devid\n");
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goto free_struct;
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}
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status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus,
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&rom->device, &rom->function);
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if (status != EFI_SUCCESS)
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goto free_struct;
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memcpy(rom->romdata, romimage, romsize);
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return status;
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free_struct:
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efi_bs_call(free_pool, rom);
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return status;
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}
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/*
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* There's no way to return an informative status from this function,
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* because any analysis (and printing of error messages) needs to be
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* done directly at the EFI function call-site.
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*
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* For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
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* just didn't find any PCI devices, but there's no way to tell outside
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* the context of the call.
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*/
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static void setup_efi_pci(struct boot_params *params)
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{
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efi_status_t status;
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void **pci_handle = NULL;
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efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
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unsigned long size = 0;
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struct setup_data *data;
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efi_handle_t h;
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int i;
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
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&pci_proto, NULL, &size, pci_handle);
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if (status == EFI_BUFFER_TOO_SMALL) {
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
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(void **)&pci_handle);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to allocate memory for 'pci_handle'\n");
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return;
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}
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
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&pci_proto, NULL, &size, pci_handle);
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}
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if (status != EFI_SUCCESS)
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goto free_handle;
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
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while (data && data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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for_each_efi_handle(h, pci_handle, size, i) {
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efi_pci_io_protocol_t *pci = NULL;
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struct pci_setup_rom *rom;
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status = efi_bs_call(handle_protocol, h, &pci_proto,
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(void **)&pci);
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if (status != EFI_SUCCESS || !pci)
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continue;
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status = preserve_pci_rom_image(pci, &rom);
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if (status != EFI_SUCCESS)
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continue;
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if (data)
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data->next = (unsigned long)rom;
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else
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params->hdr.setup_data = (unsigned long)rom;
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data = (struct setup_data *)rom;
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}
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free_handle:
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efi_bs_call(free_pool, pci_handle);
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}
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static void retrieve_apple_device_properties(struct boot_params *boot_params)
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{
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efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID;
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struct setup_data *data, *new;
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efi_status_t status;
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u32 size = 0;
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apple_properties_protocol_t *p;
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status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p);
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if (status != EFI_SUCCESS)
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return;
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if (efi_table_attr(p, version) != 0x10000) {
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efi_err("Unsupported properties proto version\n");
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return;
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}
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efi_call_proto(p, get_all, NULL, &size);
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if (!size)
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return;
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do {
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA,
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size + sizeof(struct setup_data),
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(void **)&new);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to allocate memory for 'properties'\n");
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return;
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}
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status = efi_call_proto(p, get_all, new->data, &size);
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if (status == EFI_BUFFER_TOO_SMALL)
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efi_bs_call(free_pool, new);
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} while (status == EFI_BUFFER_TOO_SMALL);
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new->type = SETUP_APPLE_PROPERTIES;
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new->len = size;
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new->next = 0;
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data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data;
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if (!data) {
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boot_params->hdr.setup_data = (unsigned long)new;
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} else {
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while (data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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data->next = (unsigned long)new;
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}
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}
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static const efi_char16_t apple[] = L"Apple";
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static void setup_quirks(struct boot_params *boot_params)
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{
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efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long)
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efi_table_attr(efi_system_table, fw_vendor);
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if (!memcmp(fw_vendor, apple, sizeof(apple))) {
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if (IS_ENABLED(CONFIG_APPLE_PROPERTIES))
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retrieve_apple_device_properties(boot_params);
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}
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}
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/*
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* See if we have Universal Graphics Adapter (UGA) protocol
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*/
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static efi_status_t
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setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size)
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{
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efi_status_t status;
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u32 width, height;
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void **uga_handle = NULL;
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efi_uga_draw_protocol_t *uga = NULL, *first_uga;
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efi_handle_t handle;
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int i;
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status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
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(void **)&uga_handle);
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if (status != EFI_SUCCESS)
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return status;
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
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uga_proto, NULL, &size, uga_handle);
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if (status != EFI_SUCCESS)
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goto free_handle;
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height = 0;
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width = 0;
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first_uga = NULL;
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for_each_efi_handle(handle, uga_handle, size, i) {
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efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
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u32 w, h, depth, refresh;
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void *pciio;
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status = efi_bs_call(handle_protocol, handle, uga_proto,
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(void **)&uga);
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if (status != EFI_SUCCESS)
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continue;
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pciio = NULL;
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efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio);
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status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh);
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if (status == EFI_SUCCESS && (!first_uga || pciio)) {
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width = w;
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height = h;
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/*
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* Once we've found a UGA supporting PCIIO,
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* don't bother looking any further.
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*/
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if (pciio)
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break;
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first_uga = uga;
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}
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}
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if (!width && !height)
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goto free_handle;
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/* EFI framebuffer */
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si->orig_video_isVGA = VIDEO_TYPE_EFI;
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si->lfb_depth = 32;
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si->lfb_width = width;
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si->lfb_height = height;
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si->red_size = 8;
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si->red_pos = 16;
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si->green_size = 8;
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si->green_pos = 8;
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si->blue_size = 8;
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si->blue_pos = 0;
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si->rsvd_size = 8;
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si->rsvd_pos = 24;
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free_handle:
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efi_bs_call(free_pool, uga_handle);
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return status;
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}
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static void setup_graphics(struct boot_params *boot_params)
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{
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efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
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struct screen_info *si;
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efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
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efi_status_t status;
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unsigned long size;
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void **gop_handle = NULL;
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void **uga_handle = NULL;
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si = &boot_params->screen_info;
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memset(si, 0, sizeof(*si));
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size = 0;
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
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&graphics_proto, NULL, &size, gop_handle);
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if (status == EFI_BUFFER_TOO_SMALL)
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status = efi_setup_gop(si, &graphics_proto, size);
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if (status != EFI_SUCCESS) {
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size = 0;
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status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL,
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&uga_proto, NULL, &size, uga_handle);
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if (status == EFI_BUFFER_TOO_SMALL)
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setup_uga(si, &uga_proto, size);
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}
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}
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static void __noreturn efi_exit(efi_handle_t handle, efi_status_t status)
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{
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efi_bs_call(exit, handle, status, 0, NULL);
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for(;;)
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asm("hlt");
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}
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void startup_32(struct boot_params *boot_params);
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void __noreturn efi_stub_entry(efi_handle_t handle,
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efi_system_table_t *sys_table_arg,
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struct boot_params *boot_params);
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/*
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* Because the x86 boot code expects to be passed a boot_params we
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* need to create one ourselves (usually the bootloader would create
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* one for us).
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*/
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efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
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efi_system_table_t *sys_table_arg)
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{
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struct boot_params *boot_params;
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struct setup_header *hdr;
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void *image_base;
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efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
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int options_size = 0;
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efi_status_t status;
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char *cmdline_ptr;
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unsigned long ramdisk_addr;
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unsigned long ramdisk_size;
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efi_system_table = sys_table_arg;
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/* Check if we were booted by the EFI firmware */
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if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
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efi_exit(handle, EFI_INVALID_PARAMETER);
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status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
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efi_exit(handle, status);
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}
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image_base = efi_table_attr(image, image_base);
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image_offset = (void *)startup_32 - image_base;
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status = efi_allocate_pages(sizeof(struct boot_params),
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(unsigned long *)&boot_params, ULONG_MAX);
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if (status != EFI_SUCCESS) {
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efi_err("Failed to allocate lowmem for boot params\n");
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efi_exit(handle, status);
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}
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memset(boot_params, 0x0, sizeof(struct boot_params));
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hdr = &boot_params->hdr;
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/* Copy the second sector to boot_params */
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memcpy(&hdr->jump, image_base + 512, 512);
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/*
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* Fill out some of the header fields ourselves because the
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* EFI firmware loader doesn't load the first sector.
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*/
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hdr->root_flags = 1;
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hdr->vid_mode = 0xffff;
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hdr->boot_flag = 0xAA55;
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hdr->type_of_loader = 0x21;
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/* Convert unicode cmdline to ascii */
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cmdline_ptr = efi_convert_cmdline(image, &options_size, ULONG_MAX);
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if (!cmdline_ptr)
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goto fail;
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efi_set_u64_split((unsigned long)cmdline_ptr,
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&hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr);
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hdr->ramdisk_image = 0;
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hdr->ramdisk_size = 0;
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efi_stub_entry(handle, sys_table_arg, boot_params);
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/* not reached */
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fail:
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efi_free(sizeof(struct boot_params), (unsigned long)boot_params);
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efi_exit(handle, status);
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}
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static void add_e820ext(struct boot_params *params,
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struct setup_data *e820ext, u32 nr_entries)
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{
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struct setup_data *data;
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e820ext->type = SETUP_E820_EXT;
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e820ext->len = nr_entries * sizeof(struct boot_e820_entry);
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e820ext->next = 0;
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
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while (data && data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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if (data)
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data->next = (unsigned long)e820ext;
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else
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params->hdr.setup_data = (unsigned long)e820ext;
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}
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static efi_status_t
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setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size)
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{
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struct boot_e820_entry *entry = params->e820_table;
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struct efi_info *efi = ¶ms->efi_info;
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struct boot_e820_entry *prev = NULL;
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u32 nr_entries;
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u32 nr_desc;
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int i;
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nr_entries = 0;
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nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
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for (i = 0; i < nr_desc; i++) {
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efi_memory_desc_t *d;
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unsigned int e820_type = 0;
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unsigned long m = efi->efi_memmap;
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#ifdef CONFIG_X86_64
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m |= (u64)efi->efi_memmap_hi << 32;
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#endif
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d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i);
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switch (d->type) {
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case EFI_RESERVED_TYPE:
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case EFI_RUNTIME_SERVICES_CODE:
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case EFI_RUNTIME_SERVICES_DATA:
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case EFI_MEMORY_MAPPED_IO:
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case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
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case EFI_PAL_CODE:
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e820_type = E820_TYPE_RESERVED;
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break;
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case EFI_UNUSABLE_MEMORY:
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e820_type = E820_TYPE_UNUSABLE;
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break;
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case EFI_ACPI_RECLAIM_MEMORY:
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e820_type = E820_TYPE_ACPI;
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break;
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|
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case EFI_LOADER_CODE:
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case EFI_LOADER_DATA:
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case EFI_BOOT_SERVICES_CODE:
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case EFI_BOOT_SERVICES_DATA:
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case EFI_CONVENTIONAL_MEMORY:
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if (efi_soft_reserve_enabled() &&
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(d->attribute & EFI_MEMORY_SP))
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e820_type = E820_TYPE_SOFT_RESERVED;
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else
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e820_type = E820_TYPE_RAM;
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break;
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|
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case EFI_ACPI_MEMORY_NVS:
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e820_type = E820_TYPE_NVS;
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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));
|
|
|
|
efi_set_u64_split((unsigned long)efi_system_table,
|
|
&p->efi->efi_systab, &p->efi->efi_systab_hi);
|
|
p->efi->efi_memdesc_size = *map->desc_size;
|
|
p->efi->efi_memdesc_version = *map->desc_ver;
|
|
efi_set_u64_split((unsigned long)*map->map,
|
|
&p->efi->efi_memmap, &p->efi->efi_memmap_hi);
|
|
p->efi->efi_memmap_size = *map->map_size;
|
|
|
|
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 the address of startup_32, which has potentially been
|
|
* relocated by efi_relocate_kernel.
|
|
* On failure, we exit to the firmware via efi_exit instead of returning.
|
|
*/
|
|
unsigned long efi_main(efi_handle_t handle,
|
|
efi_system_table_t *sys_table_arg,
|
|
struct boot_params *boot_params)
|
|
{
|
|
unsigned long bzimage_addr = (unsigned long)startup_32;
|
|
unsigned long buffer_start, buffer_end;
|
|
struct setup_header *hdr = &boot_params->hdr;
|
|
efi_status_t status;
|
|
|
|
efi_system_table = sys_table_arg;
|
|
|
|
/* Check if we were booted by the EFI firmware */
|
|
if (efi_system_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
|
|
efi_exit(handle, EFI_INVALID_PARAMETER);
|
|
|
|
/*
|
|
* If the kernel isn't already loaded at a suitable address,
|
|
* relocate it.
|
|
*
|
|
* It must be loaded above LOAD_PHYSICAL_ADDR.
|
|
*
|
|
* The maximum address for 64-bit is 1 << 46 for 4-level paging. This
|
|
* is defined as the macro MAXMEM, but unfortunately that is not a
|
|
* compile-time constant if 5-level paging is configured, so we instead
|
|
* define our own macro for use here.
|
|
*
|
|
* For 32-bit, the maximum address is complicated to figure out, for
|
|
* now use KERNEL_IMAGE_SIZE, which will be 512MiB, the same as what
|
|
* KASLR uses.
|
|
*
|
|
* Also relocate it if image_offset is zero, i.e. the kernel wasn't
|
|
* loaded by LoadImage, but rather by a bootloader that called the
|
|
* handover entry. The reason we must always relocate in this case is
|
|
* to handle the case of systemd-boot booting a unified kernel image,
|
|
* which is a PE executable that contains the bzImage and an initrd as
|
|
* COFF sections. The initrd section is placed after the bzImage
|
|
* without ensuring that there are at least init_size bytes available
|
|
* for the bzImage, and thus the compressed kernel's startup code may
|
|
* overwrite the initrd unless it is moved out of the way.
|
|
*/
|
|
|
|
buffer_start = ALIGN(bzimage_addr - image_offset,
|
|
hdr->kernel_alignment);
|
|
buffer_end = buffer_start + hdr->init_size;
|
|
|
|
if ((buffer_start < LOAD_PHYSICAL_ADDR) ||
|
|
(IS_ENABLED(CONFIG_X86_32) && buffer_end > KERNEL_IMAGE_SIZE) ||
|
|
(IS_ENABLED(CONFIG_X86_64) && buffer_end > MAXMEM_X86_64_4LEVEL) ||
|
|
(image_offset == 0)) {
|
|
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_err("efi_relocate_kernel() failed!\n");
|
|
goto fail;
|
|
}
|
|
/*
|
|
* Now that we've copied the kernel elsewhere, we no longer
|
|
* have a set up block before startup_32(), so reset image_offset
|
|
* to zero in case it was set earlier.
|
|
*/
|
|
image_offset = 0;
|
|
}
|
|
|
|
#ifdef CONFIG_CMDLINE_BOOL
|
|
status = efi_parse_options(CONFIG_CMDLINE);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_err("Failed to parse options\n");
|
|
goto fail;
|
|
}
|
|
#endif
|
|
if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
|
|
unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr |
|
|
((u64)boot_params->ext_cmd_line_ptr << 32));
|
|
status = efi_parse_options((char *)cmdline_paddr);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_err("Failed to parse options\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* At this point, an initrd may already have been loaded by the
|
|
* bootloader and passed via bootparams. We permit an initrd loaded
|
|
* from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it.
|
|
*
|
|
* If the device path is not present, any command-line initrd=
|
|
* arguments will be processed only if image is not NULL, which will be
|
|
* the case only if we were loaded via the PE entry point.
|
|
*/
|
|
if (!efi_noinitrd) {
|
|
unsigned long addr, size;
|
|
|
|
status = efi_load_initrd(image, &addr, &size,
|
|
hdr->initrd_addr_max, ULONG_MAX);
|
|
|
|
if (status != EFI_SUCCESS) {
|
|
efi_err("Failed to load initrd!\n");
|
|
goto fail;
|
|
}
|
|
efi_set_u64_split(addr, &hdr->ramdisk_image,
|
|
&boot_params->ext_ramdisk_image);
|
|
efi_set_u64_split(size, &hdr->ramdisk_size,
|
|
&boot_params->ext_ramdisk_size);
|
|
}
|
|
|
|
/*
|
|
* 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 = exit_boot(boot_params, handle);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_err("exit_boot() failed!\n");
|
|
goto fail;
|
|
}
|
|
|
|
return bzimage_addr;
|
|
fail:
|
|
efi_err("efi_main() failed!\n");
|
|
|
|
efi_exit(handle, status);
|
|
}
|