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fba5be3b60
The coomand bootefi calls efi_init_obj_list to do the efi set up before launching an .efi payload, but efi_init_obj_list is called only once. There are some initializations which depend on the environment and should be done each time a payload gets launched and not only once. A motivation for this changes is the following order of events: 1. Launch an EFI application (e.g. bootefi hello) 2. Change the ip address 3. Launch another application which uses the pxe protocol As the EFI pxe protocol was initialized when the handles for efi net were created in 1., the ip was hardcoded there. In this example, another possibility would be to make a callback for ip address changes to go all the way up to efi_net. Signed-off-by: Adriano Cordova <adriano.cordova@canonical.com>
374 lines
8.3 KiB
C
374 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI setup code
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*
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* Copyright (c) 2016-2018 Alexander Graf et al.
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*/
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#define LOG_CATEGORY LOGC_EFI
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#include <efi_loader.h>
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#include <efi_variable.h>
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#include <log.h>
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#include <asm-generic/unaligned.h>
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#define OBJ_LIST_INITIALIZED 0
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#define OBJ_LIST_NOT_INITIALIZED 1
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efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
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/*
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* Allow unaligned memory access.
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*
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* This routine is overridden by architectures providing this feature.
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*/
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void __weak allow_unaligned(void)
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{
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}
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/**
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* efi_init_platform_lang() - define supported languages
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*
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* Set the PlatformLangCodes and PlatformLang variables.
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*
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* Return: status code
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*/
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static efi_status_t efi_init_platform_lang(void)
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{
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efi_status_t ret;
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efi_uintn_t data_size = 0;
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char *lang = CONFIG_EFI_PLATFORM_LANG_CODES;
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char *pos;
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/*
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* Variable PlatformLangCodes defines the language codes that the
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* machine can support.
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*/
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ret = efi_set_variable_int(u"PlatformLangCodes",
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&efi_global_variable_guid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS |
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EFI_VARIABLE_READ_ONLY,
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sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
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CONFIG_EFI_PLATFORM_LANG_CODES, false);
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if (ret != EFI_SUCCESS)
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goto out;
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/*
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* Variable PlatformLang defines the language that the machine has been
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* configured for.
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*/
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ret = efi_get_variable_int(u"PlatformLang",
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&efi_global_variable_guid,
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NULL, &data_size, &pos, NULL);
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if (ret == EFI_BUFFER_TOO_SMALL) {
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/* The variable is already set. Do not change it. */
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ret = EFI_SUCCESS;
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goto out;
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}
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/*
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* The list of supported languages is semicolon separated. Use the first
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* language to initialize PlatformLang.
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*/
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pos = strchr(lang, ';');
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if (pos)
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*pos = 0;
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ret = efi_set_variable_int(u"PlatformLang",
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&efi_global_variable_guid,
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EFI_VARIABLE_NON_VOLATILE |
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS,
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1 + strlen(lang), lang, false);
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out:
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if (ret != EFI_SUCCESS)
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printf("EFI: cannot initialize platform language settings\n");
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return ret;
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}
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/**
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* efi_init_secure_boot - initialize secure boot state
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*
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* Return: status code
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*/
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static efi_status_t efi_init_secure_boot(void)
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{
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efi_guid_t signature_types[] = {
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EFI_CERT_SHA256_GUID,
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EFI_CERT_X509_GUID,
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};
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efi_status_t ret;
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ret = efi_set_variable_int(u"SignatureSupport",
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&efi_global_variable_guid,
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EFI_VARIABLE_READ_ONLY |
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS,
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sizeof(signature_types),
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&signature_types, false);
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if (ret != EFI_SUCCESS)
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printf("EFI: cannot initialize SignatureSupport variable\n");
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return ret;
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}
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/**
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* efi_init_capsule - initialize capsule update state
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*
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* Return: status code
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*/
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static efi_status_t efi_init_capsule(void)
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{
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efi_status_t ret = EFI_SUCCESS;
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if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT)) {
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u16 var_name16[12];
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efi_create_indexed_name(var_name16, sizeof(var_name16),
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"Capsule", CONFIG_EFI_CAPSULE_MAX);
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ret = efi_set_variable_int(u"CapsuleMax",
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&efi_guid_capsule_report,
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EFI_VARIABLE_READ_ONLY |
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS,
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22, var_name16, false);
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if (ret != EFI_SUCCESS)
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printf("EFI: cannot initialize CapsuleMax variable\n");
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}
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return ret;
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}
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/**
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* efi_init_os_indications() - indicate supported features for OS requests
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*
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* Set the OsIndicationsSupported variable.
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*
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* Return: status code
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*/
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static efi_status_t efi_init_os_indications(void)
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{
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u64 os_indications_supported = 0;
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if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT))
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os_indications_supported |=
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EFI_OS_INDICATIONS_CAPSULE_RESULT_VAR_SUPPORTED;
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK))
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os_indications_supported |=
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EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT))
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os_indications_supported |=
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EFI_OS_INDICATIONS_FMP_CAPSULE_SUPPORTED;
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return efi_set_variable_int(u"OsIndicationsSupported",
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&efi_global_variable_guid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS |
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EFI_VARIABLE_READ_ONLY,
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sizeof(os_indications_supported),
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&os_indications_supported, false);
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}
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/**
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* efi_init_early() - handle initialization at early stage
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*
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* expected to be called in board_init_r().
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*
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* Return: status code
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*/
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int efi_init_early(void)
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{
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efi_status_t ret;
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/* Allow unaligned memory access */
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allow_unaligned();
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/* Initialize root node */
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ret = efi_root_node_register();
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if (ret != EFI_SUCCESS)
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goto out;
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ret = efi_console_register();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Initialize EFI driver uclass */
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ret = efi_driver_init();
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if (ret != EFI_SUCCESS)
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goto out;
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return 0;
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out:
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/* never re-init UEFI subsystem */
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efi_obj_list_initialized = ret;
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return -1;
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}
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/**
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* efi_start_obj_list() - Start EFI object list
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*
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* Return: status code
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*/
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static efi_status_t efi_start_obj_list(void)
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{
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efi_status_t ret = EFI_SUCCESS;
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return ret;
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}
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/**
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* efi_init_obj_list() - Initialize and populate EFI object list
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*
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* Return: status code
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*/
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efi_status_t efi_init_obj_list(void)
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{
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efi_status_t ret = EFI_SUCCESS;
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/* Initialize only once, but start every time if correctly initialized*/
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if (efi_obj_list_initialized == OBJ_LIST_INITIALIZED)
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return efi_start_obj_list();
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if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
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return efi_obj_list_initialized;
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/* Set up console modes */
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efi_setup_console_size();
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/*
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* Probe block devices to find the ESP.
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* efi_disks_register() must be called before efi_init_variables().
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*/
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ret = efi_disks_register();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Initialize variable services */
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ret = efi_init_variables();
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if (ret != EFI_SUCCESS)
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goto out;
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if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
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/* update boot option after variable service initialized */
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ret = efi_bootmgr_update_media_device_boot_option();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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/* Define supported languages */
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ret = efi_init_platform_lang();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Indicate supported features */
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ret = efi_init_os_indications();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Initialize system table */
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ret = efi_initialize_system_table();
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if (ret != EFI_SUCCESS)
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goto out;
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if (IS_ENABLED(CONFIG_EFI_ECPT)) {
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ret = efi_ecpt_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_EFI_ESRT)) {
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ret = efi_esrt_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) {
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ret = efi_tcg2_register();
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if (ret != EFI_SUCCESS)
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goto out;
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ret = efi_tcg2_do_initial_measurement();
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if (ret == EFI_SECURITY_VIOLATION)
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goto out;
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}
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/* Install EFI_RNG_PROTOCOL */
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if (IS_ENABLED(CONFIG_EFI_RNG_PROTOCOL)) {
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ret = efi_rng_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_EFI_RISCV_BOOT_PROTOCOL)) {
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ret = efi_riscv_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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/* Secure boot */
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if (IS_ENABLED(CONFIG_EFI_SECURE_BOOT)) {
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ret = efi_init_secure_boot();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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/* Indicate supported runtime services */
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ret = efi_init_runtime_supported();
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if (ret != EFI_SUCCESS)
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goto out;
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if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT)) {
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ret = efi_load_capsule_drivers();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_VIDEO)) {
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ret = efi_gop_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_NETDEVICES)) {
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ret = efi_net_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_ACPI)) {
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ret = efi_acpi_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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if (IS_ENABLED(CONFIG_SMBIOS)) {
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ret = efi_smbios_register();
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if (ret != EFI_SUCCESS)
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goto out;
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}
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ret = efi_watchdog_register();
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if (ret != EFI_SUCCESS)
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goto out;
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ret = efi_init_capsule();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Initialize EFI runtime services */
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ret = efi_reset_system_init();
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if (ret != EFI_SUCCESS)
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goto out;
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/* Execute capsules after reboot */
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK) &&
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!IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
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ret = efi_launch_capsules();
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if (ret != EFI_SUCCESS)
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goto out;
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ret = efi_start_obj_list();
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out:
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efi_obj_list_initialized = ret;
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return ret;
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}
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