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User can select the Boot#### included in BootOrder variable. If user quits thie menu, or the selected Boot#### fails to boot, efi bootmgr continues to boot in accordance with BootOrder variable. Signed-off-by: Masahisa Kojima --- include/efi_loader.h | 1 + lib/efi_loader/Kconfig | 10 + lib/efi_loader/efi_bootmgr.c | 557 ++++++++++++++++++++++++++++++++++- 3 files changed, 565 insertions(+), 3 deletions(-) diff --git a/include/efi_loader.h b/include/efi_loader.h index e390d323a9..2c45f42dca 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -278,6 +278,7 @@ extern const efi_guid_t efi_guid_loaded_image; extern const efi_guid_t efi_guid_loaded_image_device_path; extern const efi_guid_t efi_guid_device_path_to_text_protocol; extern const efi_guid_t efi_simple_file_system_protocol_guid; +extern const efi_guid_t efi_system_partition_guid; extern const efi_guid_t efi_file_info_guid; /* GUID for file system information */ extern const efi_guid_t efi_file_system_info_guid; diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig index e5e35fe51f..c8108f3164 100644 --- a/lib/efi_loader/Kconfig +++ b/lib/efi_loader/Kconfig @@ -39,6 +39,16 @@ config CMD_BOOTEFI_BOOTMGR via UEFI variables Boot####, BootOrder, and BootNext. This enables the 'bootefi bootmgr' command. +config EFI_BOOT_MENU + bool "UEFI Boot Menu driven boot device selection" + default n + help + Select this option if you want to enable the menu driven boot device + selection. This menu provides the functionality to select a boot + option to start, and allow users to edit Boot#### and BootOrder. + If this menu is enabled, CLI can be disabled if the system boots + via UEFI variable Boot#### and BootOrder. + config EFI_SETUP_EARLY bool diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c index 8c04ecbdc8..013d868f23 100644 --- a/lib/efi_loader/efi_bootmgr.c +++ b/lib/efi_loader/efi_bootmgr.c @@ -7,13 +7,17 @@ #define LOG_CATEGORY LOGC_EFI +#include #include #include #include #include +#include +#include #include #include #include +#include static const struct efi_boot_services *bs; static const struct efi_runtime_services *rs; @@ -22,14 +26,538 @@ static const struct efi_runtime_services *rs; * bootmgr implements the logic of trying to find a payload to boot * based on the BootOrder + BootXXXX variables, and then loading it. * - * TODO detecting a special key held (f9?) and displaying a boot menu - * like you would get on a PC would be clever. - * * TODO if we had a way to write and persist variables after the OS * has started, we'd also want to check OsIndications to see if we * should do normal or recovery boot. */ +#define EFI_BOOTMGR_MENU_ENTRY_NUM_MAX 1024 + +typedef efi_status_t (*efi_bootmenu_entry_func)(void *data, bool *exit); + +/** + * struct efi_bootmgr_menu_entry - menu entry structure + * + * @menu_index: menu entry index + * @title: title of entry + * @key: unique key + * @bootmgr_menu: pointer to the menu structure + * @next: pointer to the next entry + * @func: callback function to be called when this entry is selected + * @data: data to be passed to the callback function + */ +struct efi_bootmgr_menu_entry { + u32 menu_index; + u16 *title; + char key[6]; + struct efi_bootmgr_menu *bootmgr_menu; + struct efi_bootmgr_menu_entry *next; + efi_bootmenu_entry_func func; + void *data; +}; + +/** + * struct efi_bootmgr_menuy - bootmgr menu structure + * + * @delay: delay for autoboot + * @active: active menu entry index + * @count: total count of menu entry + * @autoboot: flag to enable autoboot + * @first: pointer to the first menu entry + */ +struct efi_bootmgr_menu { + int delay; + int active; + int count; + bool autoboot; + struct efi_bootmgr_menu_entry *first; +}; + +enum efi_bootmgr_menu_key { + KEY_NONE = 0, + KEY_UP, + KEY_DOWN, + KEY_SELECT, + KEY_QUIT, +}; + +struct efi_bootmgr_menu_item { + u16 *title; + efi_bootmenu_entry_func func; + void *data; +}; + +struct efi_bootmgr_boot_selection_data { + u16 bootorder_index; + void *load_option; + int *selected; +}; + +static efi_status_t efi_bootmgr_process_boot_selected(void *data, bool *exit); +static efi_status_t efi_bootmgr_process_boot_selection(void *data, bool *exit); + +static struct efi_bootmgr_menu_item bootmgr_menu_items[] = { + {u"Boot Manager", efi_bootmgr_process_boot_selection}, + {u"Quit", NULL}, +}; + +static void efi_bootmgr_menu_print_entry(void *data) +{ + struct efi_bootmgr_menu_entry *entry = data; + int reverse = (entry->bootmgr_menu->active == entry->menu_index); + + /* TODO: support scroll or page for many entries */ + + /* + * Move cursor to line where the entry will be drown (entry->count) + * First 3 lines contain bootmgr menu header + one empty line + * For the last "Quit" entry, add one empty line + */ + if (entry->menu_index == (entry->bootmgr_menu->count - 1)) + printf(ANSI_CURSOR_POSITION, entry->menu_index + 5, 1); + else + printf(ANSI_CURSOR_POSITION, entry->menu_index + 4, 1); + + puts(" "); + + if (reverse) + puts(ANSI_COLOR_REVERSE); + + printf("%ls", entry->title); + + if (reverse) + puts(ANSI_COLOR_RESET); +} + +static void efi_bootmgr_menu_display_statusline(struct menu *m) +{ + struct efi_bootmgr_menu_entry *entry; + struct efi_bootmgr_menu *bootmgr_menu; + + if (menu_default_choice(m, (void *)&entry) < 0) + return; + + bootmgr_menu = entry->bootmgr_menu; + + printf(ANSI_CURSOR_POSITION, 1, 1); + puts(ANSI_CLEAR_LINE); + printf(ANSI_CURSOR_POSITION, 2, 1); + puts(" *** U-Boot EFI Boot Manager ***"); + puts(ANSI_CLEAR_LINE_TO_END); + printf(ANSI_CURSOR_POSITION, 3, 1); + puts(ANSI_CLEAR_LINE); + + /* First 3 lines are bootmgr_menu header + 2 empty lines between entries */ + printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 5, 1); + puts(ANSI_CLEAR_LINE); + printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 6, 1); + puts(" Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit"); + puts(ANSI_CLEAR_LINE_TO_END); + printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 7, 1); + puts(ANSI_CLEAR_LINE); +} + +static void efi_bootmgr_menu_autoboot_loop(struct efi_bootmgr_menu *bootmgr_menu, + enum efi_bootmgr_menu_key *key, int *esc) +{ + int i, c; + + if (bootmgr_menu->delay > 0) { + printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 5, 1); + printf(" Hit any key to stop autoboot: %2d ", bootmgr_menu->delay); + } + + while (bootmgr_menu->delay > 0) { + for (i = 0; i < 100; ++i) { + if (!tstc()) { + WATCHDOG_RESET(); + mdelay(10); + continue; + } + + bootmgr_menu->delay = -1; + c = getchar(); + + switch (c) { + case '\e': + *esc = 1; + *key = KEY_NONE; + break; + case '\r': + *key = KEY_SELECT; + break; + case 0x3: /* ^C */ + *key = KEY_QUIT; + break; + default: + *key = KEY_NONE; + break; + } + + break; + } + + if (bootmgr_menu->delay < 0) + break; + + --bootmgr_menu->delay; + printf("\b\b\b%2d ", bootmgr_menu->delay); + } + + printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 5, 1); + puts(ANSI_CLEAR_LINE); + + if (bootmgr_menu->delay == 0) + *key = KEY_QUIT; +} + +static void efi_bootmgr_menu_loop(struct efi_bootmgr_menu *bootmgr_menu, + enum efi_bootmgr_menu_key *key, int *esc) +{ + int c; + + if (*esc == 1) { + if (tstc()) { + c = getchar(); + } else { + WATCHDOG_RESET(); + mdelay(10); + if (tstc()) + c = getchar(); + else + c = '\e'; + } + } else { + while (!tstc()) { + WATCHDOG_RESET(); + mdelay(10); + } + c = getchar(); + } + + switch (*esc) { + case 0: + /* First char of ANSI escape sequence '\e' */ + if (c == '\e') { + *esc = 1; + *key = KEY_NONE; + } + break; + case 1: + /* Second char of ANSI '[' */ + if (c == '[') { + *esc = 2; + *key = KEY_NONE; + } else { + /* Alone ESC key was pressed */ + *key = KEY_QUIT; + *esc = (c == '\e') ? 1 : 0; + } + break; + case 2: + case 3: + /* Third char of ANSI (number '1') - optional */ + if (*esc == 2 && c == '1') { + *esc = 3; + *key = KEY_NONE; + break; + } + + *esc = 0; + + /* ANSI 'A' - key up was pressed */ + if (c == 'A') + *key = KEY_UP; + /* ANSI 'B' - key down was pressed */ + else if (c == 'B') + *key = KEY_DOWN; + /* other key was pressed */ + else + *key = KEY_NONE; + + break; + } + + /* enter key was pressed */ + if (c == '\r') + *key = KEY_SELECT; + + /* ^C was pressed */ + if (c == 0x3) + *key = KEY_QUIT; +} + +static char *efi_bootmgr_menu_choice_entry(void *data) +{ + int i; + int esc = 0; + struct efi_bootmgr_menu_entry *iter; + enum efi_bootmgr_menu_key key = KEY_NONE; + struct efi_bootmgr_menu *bootmgr_menu = data; + + while (1) { + if (bootmgr_menu->delay >= 0 && bootmgr_menu->autoboot) { + /* Autoboot was not stopped */ + efi_bootmgr_menu_autoboot_loop(bootmgr_menu, &key, &esc); + } else { + /* Some key was pressed, so autoboot was stopped */ + efi_bootmgr_menu_loop(bootmgr_menu, &key, &esc); + } + + switch (key) { + case KEY_UP: + if (bootmgr_menu->active > 0) + --bootmgr_menu->active; + /* no menu key selected, regenerate menu */ + return NULL; + case KEY_DOWN: + if (bootmgr_menu->active < bootmgr_menu->count - 1) + ++bootmgr_menu->active; + /* no menu key selected, regenerate menu */ + return NULL; + case KEY_SELECT: + iter = bootmgr_menu->first; + for (i = 0; i < bootmgr_menu->active; ++i) + iter = iter->next; + return iter->key; + case KEY_QUIT: + /* Quit by choosing the last entry */ + iter = bootmgr_menu->first; + while (iter->next) + iter = iter->next; + return iter->key; + default: + break; + } + } + + /* never happens */ + debug("bootmgr menu: this should not happen"); + return NULL; +} + +static void efi_bootmgr_menu_destroy(struct efi_bootmgr_menu *bootmgr_menu) +{ + struct efi_bootmgr_menu_entry *next; + struct efi_bootmgr_menu_entry *iter = bootmgr_menu->first; + + while (iter) { + next = iter->next; + free(iter); + iter = next; + } + free(bootmgr_menu); +} + +/** + * efi_bootmgr_process_common() - main handler for uefi bootmgr menu + * + * Construct the structures required to show the menu, then handle + * the user input intracting with u-boot menu functions. + * + * @items: pointer to the structure of each menu entry + * @count: the number of menu entry + * @autoboot: flag to enable autoboot + * Return: status code + */ +static efi_status_t efi_bootmgr_process_common(struct efi_bootmgr_menu_item *items, + int count, bool autoboot) +{ + u32 i; + bool exit = false; + efi_status_t ret; + struct menu *menu; + void *choice = NULL; + struct efi_bootmgr_menu_entry *entry; + struct efi_bootmgr_menu *bootmgr_menu; + struct efi_bootmgr_menu_entry *iter = NULL; + + if (count > EFI_BOOTMGR_MENU_ENTRY_NUM_MAX) + return EFI_OUT_OF_RESOURCES; + + bootmgr_menu = calloc(1, sizeof(struct efi_bootmgr_menu)); + if (!bootmgr_menu) + return EFI_OUT_OF_RESOURCES; + + bootmgr_menu->delay = 20; /* TODO: get from u-boot variable */ + bootmgr_menu->active = 0; + bootmgr_menu->autoboot = autoboot; + bootmgr_menu->first = NULL; + + for (i = 0; i < count; i++) { + entry = calloc(1, sizeof(struct efi_bootmgr_menu_entry)); + if (!entry) { + ret = EFI_LOAD_ERROR; + goto out; + } + + entry->menu_index = i; + entry->title = items->title; + snprintf(entry->key, sizeof(entry->key), "%04X", i); + entry->bootmgr_menu = bootmgr_menu; + entry->func = items->func; + entry->data = items->data; + entry->next = NULL; + + if (!iter) + bootmgr_menu->first = entry; + else + iter->next = entry; + + iter = entry; + items++; + } + bootmgr_menu->count = count; + + menu = menu_create(NULL, bootmgr_menu->delay, 1, efi_bootmgr_menu_display_statusline, + efi_bootmgr_menu_print_entry, efi_bootmgr_menu_choice_entry, + bootmgr_menu); + if (!menu) { + ret = EFI_INVALID_PARAMETER; + goto out; + } + + for (entry = bootmgr_menu->first; entry; entry = entry->next) { + if (!menu_item_add(menu, entry->key, entry)) { + ret = EFI_INVALID_PARAMETER; + goto out; + } + } + + menu_default_set(menu, bootmgr_menu->first->key); + + while (!exit) { + puts(ANSI_CURSOR_HIDE); + puts(ANSI_CLEAR_CONSOLE); + printf(ANSI_CURSOR_POSITION, 1, 1); + + if (menu_get_choice(menu, &choice)) { + entry = choice; + if (entry->func) + ret = entry->func(entry->data, &exit); + + /* last entry "Quit" is selected, exit this menu */ + if (entry->menu_index == (entry->bootmgr_menu->count - 1)) { + ret = EFI_ABORTED; + break; + } + } + } + +out: + menu_destroy(menu); + efi_bootmgr_menu_destroy(bootmgr_menu); + + puts(ANSI_CURSOR_HIDE); + puts(ANSI_CLEAR_CONSOLE); + printf(ANSI_CURSOR_POSITION, 1, 1); + + return ret; +} + +static efi_status_t efi_bootmgr_show_boot_selection(u16 *bootorder, efi_uintn_t count, + int *selected) +{ + u32 i; + efi_status_t ret; + efi_uintn_t size; + void *load_option; + struct efi_load_option lo; + u16 varname[] = u"Boot####"; + struct efi_bootmgr_menu_item *menu_item, *iter; + + menu_item = calloc(count + 1, sizeof(struct efi_bootmgr_menu_item)); + if (!menu_item) { + ret = EFI_OUT_OF_RESOURCES; + goto out; + } + + iter = menu_item; + for (i = 0; i < count; i++) { + efi_create_indexed_name(varname, sizeof(varname), + "Boot", bootorder[i]); + load_option = efi_get_var(varname, &efi_global_variable_guid, &size); + if (!load_option) + continue; + + ret = efi_deserialize_load_option(&lo, load_option, &size); + if (ret != EFI_SUCCESS) { + log_warning("Invalid load option for %ls\n", varname); + free(load_option); + continue; + } + + if (lo.attributes & LOAD_OPTION_ACTIVE) { + struct efi_bootmgr_boot_selection_data *info; + + info = calloc(1, sizeof(struct efi_bootmgr_boot_selection_data)); + if (!info) { + ret = EFI_OUT_OF_RESOURCES; + goto out; + } + + info->bootorder_index = i; + info->load_option = load_option; + info->selected = selected; + iter->title = lo.label; + iter->func = efi_bootmgr_process_boot_selected; + iter->data = info; + iter++; + } + } + + /* add "Quit" entry */ + iter->title = u"Quit"; + iter->func = NULL; + iter->data = NULL; + count += 1; + + ret = efi_bootmgr_process_common(menu_item, count, false); + +out: + iter = menu_item; + for (i = 0; i < count - 1; i++, iter++) { + free(((struct efi_bootmgr_boot_selection_data *)iter->data)->load_option); + free(iter->data); + } + + free(menu_item); + + return ret; +} + +static efi_status_t efi_bootmgr_process_boot_selected(void *data, bool *exit) +{ + struct efi_bootmgr_boot_selection_data *info = data; + + *exit = true; + + if (info) + *info->selected = info->bootorder_index; + + return EFI_SUCCESS; +} + +static efi_status_t efi_bootmgr_process_boot_selection(void *data, bool *exit) +{ + u16 *bootorder; + efi_status_t ret; + efi_uintn_t num, size; + + bootorder = efi_get_var(L"BootOrder", &efi_global_variable_guid, &size); + if (!bootorder) + return EFI_NOT_FOUND; + + num = size / sizeof(u16); + ret = efi_bootmgr_show_boot_selection(bootorder, num, data); + if (ret == EFI_SUCCESS) + *exit = true; + + free(bootorder); + + return ret; +} + /** * try_load_entry() - try to load image for boot option * @@ -177,6 +705,29 @@ efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options) } } + if (IS_ENABLED(CONFIG_EFI_BOOT_MENU)) { + int selected; + + bootmgr_menu_items[0].data = &selected; + ret = efi_bootmgr_process_common(bootmgr_menu_items, + ARRAY_SIZE(bootmgr_menu_items), + true); + if (ret == EFI_SUCCESS) { + /* bootorder may be updated in the bootmgr menu */ + bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size); + if (!bootorder) { + log_info("BootOrder not defined\n"); + goto error; + } + ret = try_load_entry(bootorder[selected], handle, load_options); + if (ret == EFI_SUCCESS) + return ret; + + log_err("Failed to start the selected entry(Boot%04X)\n", + bootorder[selected]); + } + } + /* BootOrder */ bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size); if (!bootorder) {