[v15,01/10] eficonfig: menu-driven addition of UEFI boot option

This commit add the "eficonfig" command.
The "eficonfig" command implements the menu-driven UEFI boot option
maintenance feature. This commit implements the addition of
new boot option. User can select the block device volume having
efi_simple_file_system_protocol and select the file corresponding
to the Boot#### variable. User can also enter the description and
optional_data of the BOOT#### variable in utf8.

This commit adds "include/efi_config.h", it contains the common
definition to be used from other menus such as UEFI Secure Boot
key management.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
---
Changes in v15:
- moves the free(entry->data) outside the eficonfig_destroy() function and
  entry->data is freed explicitly only when needed
- expose eficonfig_destroy() for succeeding secure boot key management patch

Changes in v14:
- fix the missing initialization
- add comment for key handling

No change in v13:

Changes in v12:
- add select/clear menu before displaying volume selectio
- move function declaration from efi_loader.h to efi_config.h
- remove unused declaration
- support the boot option does not have file path
- correctly handle if optional_data is empty

Changes in v11:
- refactor menu entry construction, directly use eficonfig_entry structure
- remove reading directory info to calculate the number of entry
- fix invalid efi_free_pool() in ill_file_info()
- use ANSI_CURSOR_POSITION and ANSI_CLEAR_LINE instead of printf("\n")
  since current eficonfig implementation does not handle console size correctly.
  printf("\n") at the outside of console size breaks the console output.

Changes in v10:
- add initrd file selection
- do refactoring
- eficonfig_process_common() use list structure
- remove u'/' before copying file_path into current_path
- fix typos
- check snprintf error

Changes in v9:
- move "efi_guid_bootmenu_auto_generated definition" into efi_bootmgr.c
  to address build error when CMD_EFICONFIG is disabled
- fix typos and comment
- remove file system information from error message
- remove unreachable code in eficonfig_choice_entry()
- single printf() call as much as possible
- call only getchar() in  eficonfig_print_msg()
- filter out '.' entry from file selection
- update the efi_disk_get_device_name() implementation
- add function comment

Changes in v8:
- command name is change from "efimenu" to "eficonfig"
- function and struct prefixes is changed to "eficonfig"
- fix menu header string

Changes in v7:
- add "efimenu" command and uefi variable maintenance code
  moved into cmd/efimenu.c
- create include/efimenu.h to define the common definition for
  the other menu such as UEFI Secure Boot key management
- update boot option edit UI, user can select description, file,
  and optional_data to edit in the same menu like following.

  ** Edit Boot Option **

     Description: debian
     File: virtio 0:1/EFI\debian\grubaa64.efi
     Optional Data: test
     Save
     Quit

- remove exit parameter from efimenu_process_common()
- menu title type is changed from u16 to char
- efimenu_process_common() add menu title string
- reduce printf/puts function call for displaying the menu
- efi_console_get_u16_string() accept 0 length to allow
  optional_data is empty
- efi_console_get_u16_string() the "size" parameter name is changes to "count"
- efimenu is now designed to maintain the UEFI variables, remove autoboot related code
- remove one empty line before "Quit" entry
- efimenu_init() processes only the first time

Changes in v6:
- fix typos
- modify volume name to match U-Boot syntax
- compile in CONFIG_EFI_LOADER=n and CONFIG_CMD_BOOTEFI_BOOTMGR=n
- simplify u16_strncmp() usage
- support "a\b.efi" file path, use link list to handle filepath
- modify length check condition
- UEFI related menu items only appears with CONFIG_AUTOBOOT_MENU_SHOW=y

Changes in v5:
- remove forward declarations
- add const qualifier for menu items
- fix the possible unaligned access for directory info access
- split into three commit 1)add boot option 2) delete boot option 3)change boot order
  This commit is 1)add boot option.
- fix file name buffer allocation size, it should be EFI_BOOTMENU_FILE_PATH_MAX * sizeof(u16)
- fix wrong size checking for file selection

Chanes in v4:
- UEFI boot option maintenance menu is integrated into bootmenu
- display the simplified volume name(e.g. usb0:1, nvme1:2) for the
  volume selection
- instead of extending lib/efi_loader/efi_bootmgr.c, newly create
  lib/efi_loader/efi_bootmenu_maintenance.c and implement boot
  variable maintenance into it.

Changes in RFC v3:
 not included in v3 series

Changes in RFC v2:
- enable utf8 user input for boot option name
- create lib/efi_loader/efi_console.c::efi_console_get_u16_string() for
  utf8 user input handling
- use u16_strlcat instead of u16_strcat
- remove the EFI_CALLs, and newly create or expose the following
  xxx_int() functions.
    efi_locate_handle_buffer_int(), efi_open_volume_int(),
    efi_file_open_int(), efi_file_close_int(), efi_file_read_int() and
    efi_file_setpos_int().
  Note that EFI_CALLs still exist for EFI_DEVICE_PATH_TO_TEXT_PROTOCOL
  and EFI_SIMPLE_TEXT_INPUT/OUTPUT_PROTOCOL
- use efi_search_protocol() instead of calling locate_protocol() to get
  the device_path_to_text_protocol interface.
- remove unnecessary puts(ANSI_CLEAR_LINE), this patch is still depends on
  puts(ANSI_CLEAR_CONSOLE)
- skip SetVariable() if the bootorder is not changed

 cmd/Kconfig                   |    7 +
 cmd/Makefile                  |    1 +
 cmd/eficonfig.c               | 1568 +++++++++++++++++++++++++++++++++
 include/efi_config.h          |   96 ++
 include/efi_loader.h          |   37 +
 lib/efi_loader/efi_bootmgr.c  |    3 +
 lib/efi_loader/efi_boottime.c |   52 +-
 lib/efi_loader/efi_console.c  |   70 ++
 lib/efi_loader/efi_disk.c     |   50 ++
 lib/efi_loader/efi_file.c     |   75 +-
 10 files changed, 1912 insertions(+), 47 deletions(-)
 create mode 100644 cmd/eficonfig.c
 create mode 100644 include/efi_config.h

On 9/2/22 16:23, Masahisa Kojima wrote:
> This commit add the "eficonfig" command.
> The "eficonfig" command implements the menu-driven UEFI boot option
> maintenance feature. This commit implements the addition of
> new boot option. User can select the block device volume having
> efi_simple_file_system_protocol and select the file corresponding
> to the Boot#### variable. User can also enter the description and
> optional_data of the BOOT#### variable in utf8.
>
> This commit adds "include/efi_config.h", it contains the common
> definition to be used from other menus such as UEFI Secure Boot
> key management.
>
> Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
> ---
> Changes in v15:
> - moves the free(entry->data) outside the eficonfig_destroy() function and
>    entry->data is freed explicitly only when needed
> - expose eficonfig_destroy() for succeeding secure boot key management patch
>
> Changes in v14:
> - fix the missing initialization
> - add comment for key handling
>
> No change in v13:
>
> Changes in v12:
> - add select/clear menu before displaying volume selectio
> - move function declaration from efi_loader.h to efi_config.h
> - remove unused declaration
> - support the boot option does not have file path
> - correctly handle if optional_data is empty
>
> Changes in v11:
> - refactor menu entry construction, directly use eficonfig_entry structure
> - remove reading directory info to calculate the number of entry
> - fix invalid efi_free_pool() in ill_file_info()
> - use ANSI_CURSOR_POSITION and ANSI_CLEAR_LINE instead of printf("\n")
>    since current eficonfig implementation does not handle console size correctly.
>    printf("\n") at the outside of console size breaks the console output.
>
> Changes in v10:
> - add initrd file selection
> - do refactoring
> - eficonfig_process_common() use list structure
> - remove u'/' before copying file_path into current_path
> - fix typos
> - check snprintf error
>
> Changes in v9:
> - move "efi_guid_bootmenu_auto_generated definition" into efi_bootmgr.c
>    to address build error when CMD_EFICONFIG is disabled
> - fix typos and comment
> - remove file system information from error message
> - remove unreachable code in eficonfig_choice_entry()
> - single printf() call as much as possible
> - call only getchar() in  eficonfig_print_msg()
> - filter out '.' entry from file selection
> - update the efi_disk_get_device_name() implementation
> - add function comment
>
> Changes in v8:
> - command name is change from "efimenu" to "eficonfig"
> - function and struct prefixes is changed to "eficonfig"
> - fix menu header string
>
> Changes in v7:
> - add "efimenu" command and uefi variable maintenance code
>    moved into cmd/efimenu.c
> - create include/efimenu.h to define the common definition for
>    the other menu such as UEFI Secure Boot key management
> - update boot option edit UI, user can select description, file,
>    and optional_data to edit in the same menu like following.
>
>    ** Edit Boot Option **
>
>       Description: debian
>       File: virtio 0:1/EFI\debian\grubaa64.efi
>       Optional Data: test
>       Save
>       Quit
>
> - remove exit parameter from efimenu_process_common()
> - menu title type is changed from u16 to char
> - efimenu_process_common() add menu title string
> - reduce printf/puts function call for displaying the menu
> - efi_console_get_u16_string() accept 0 length to allow
>    optional_data is empty
> - efi_console_get_u16_string() the "size" parameter name is changes to "count"
> - efimenu is now designed to maintain the UEFI variables, remove autoboot related code
> - remove one empty line before "Quit" entry
> - efimenu_init() processes only the first time
>
> Changes in v6:
> - fix typos
> - modify volume name to match U-Boot syntax
> - compile in CONFIG_EFI_LOADER=n and CONFIG_CMD_BOOTEFI_BOOTMGR=n
> - simplify u16_strncmp() usage
> - support "a\b.efi" file path, use link list to handle filepath
> - modify length check condition
> - UEFI related menu items only appears with CONFIG_AUTOBOOT_MENU_SHOW=y
>
> Changes in v5:
> - remove forward declarations
> - add const qualifier for menu items
> - fix the possible unaligned access for directory info access
> - split into three commit 1)add boot option 2) delete boot option 3)change boot order
>    This commit is 1)add boot option.
> - fix file name buffer allocation size, it should be EFI_BOOTMENU_FILE_PATH_MAX * sizeof(u16)
> - fix wrong size checking for file selection
>
> Chanes in v4:
> - UEFI boot option maintenance menu is integrated into bootmenu
> - display the simplified volume name(e.g. usb0:1, nvme1:2) for the
>    volume selection
> - instead of extending lib/efi_loader/efi_bootmgr.c, newly create
>    lib/efi_loader/efi_bootmenu_maintenance.c and implement boot
>    variable maintenance into it.
>
> Changes in RFC v3:
>   not included in v3 series
>
> Changes in RFC v2:
> - enable utf8 user input for boot option name
> - create lib/efi_loader/efi_console.c::efi_console_get_u16_string() for
>    utf8 user input handling
> - use u16_strlcat instead of u16_strcat
> - remove the EFI_CALLs, and newly create or expose the following
>    xxx_int() functions.
>      efi_locate_handle_buffer_int(), efi_open_volume_int(),
>      efi_file_open_int(), efi_file_close_int(), efi_file_read_int() and
>      efi_file_setpos_int().
>    Note that EFI_CALLs still exist for EFI_DEVICE_PATH_TO_TEXT_PROTOCOL
>    and EFI_SIMPLE_TEXT_INPUT/OUTPUT_PROTOCOL
> - use efi_search_protocol() instead of calling locate_protocol() to get
>    the device_path_to_text_protocol interface.
> - remove unnecessary puts(ANSI_CLEAR_LINE), this patch is still depends on
>    puts(ANSI_CLEAR_CONSOLE)
> - skip SetVariable() if the bootorder is not changed
>
>   cmd/Kconfig                   |    7 +
>   cmd/Makefile                  |    1 +
>   cmd/eficonfig.c               | 1568 +++++++++++++++++++++++++++++++++
>   include/efi_config.h          |   96 ++
>   include/efi_loader.h          |   37 +
>   lib/efi_loader/efi_bootmgr.c  |    3 +
>   lib/efi_loader/efi_boottime.c |   52 +-
>   lib/efi_loader/efi_console.c  |   70 ++
>   lib/efi_loader/efi_disk.c     |   50 ++
>   lib/efi_loader/efi_file.c     |   75 +-
>   10 files changed, 1912 insertions(+), 47 deletions(-)
>   create mode 100644 cmd/eficonfig.c
>   create mode 100644 include/efi_config.h
>
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index 211ebe9c87..a1e8613c56 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -1928,6 +1928,13 @@ config CMD_EFIDEBUG
>   	  particularly for managing boot parameters as  well as examining
>   	  various EFI status for debugging.
>
> +config CMD_EFICONFIG
> +	bool "eficonfig - provide menu-driven uefi variables maintenance interface"
> +	depends on CMD_BOOTEFI_BOOTMGR
> +	help
> +	  Enable the 'eficonfig' command which provides the menu-driven UEFI
> +	  variable maintenance interface.
> +
>   config CMD_EXCEPTION
>   	bool "exception - raise exception"
>   	depends on ARM || RISCV || SANDBOX || X86
> diff --git a/cmd/Makefile b/cmd/Makefile
> index 6e87522b62..18f5cb890d 100644
> --- a/cmd/Makefile
> +++ b/cmd/Makefile
> @@ -63,6 +63,7 @@ obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
>   obj-$(CONFIG_CMD_EEPROM) += eeprom.o
>   obj-$(CONFIG_EFI) += efi.o
>   obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
> +obj-$(CONFIG_CMD_EFICONFIG) += eficonfig.o
>   obj-$(CONFIG_CMD_ELF) += elf.o
>   obj-$(CONFIG_CMD_EROFS) += erofs.o
>   obj-$(CONFIG_HUSH_PARSER) += exit.o
> diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> new file mode 100644
> index 0000000000..30ce55d055
> --- /dev/null
> +++ b/cmd/eficonfig.c
> @@ -0,0 +1,1568 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + *  Menu-driven UEFI Variable maintenance
> + *
> + *  Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> + */
> +
> +#include <ansi.h>
> +#include <common.h>
> +#include <charset.h>
> +#include <efi_loader.h>
> +#include <efi_load_initrd.h>
> +#include <efi_config.h>
> +#include <efi_variable.h>
> +#include <log.h>
> +#include <malloc.h>
> +#include <menu.h>
> +#include <watchdog.h>
> +#include <asm/unaligned.h>
> +#include <linux/delay.h>
> +
> +static struct efi_simple_text_input_protocol *cin;
> +
> +#define EFICONFIG_DESCRIPTION_MAX 32
> +#define EFICONFIG_OPTIONAL_DATA_MAX 64
> +
> +/**
> + * struct eficonfig_filepath_info - structure to be used to store file path
> + *
> + * @name:	file or directory name
> + * @list:	list structure
> + */
> +struct eficonfig_filepath_info {
> +	u16 *name;
> +	struct list_head list;
> +};
> +
> +/**
> + * struct eficonfig_boot_option - structure to be used for updating UEFI boot option
> + *
> + * @file_info:		user selected file info
> + * @initrd_info:	user selected initrd file info
> + * @boot_index:		index of the boot option
> + * @description:	pointer to the description string
> + * @optional_data:	pointer to the optional_data
> + * @edit_completed:	flag indicates edit complete
> + */
> +struct eficonfig_boot_option {
> +	struct eficonfig_select_file_info file_info;
> +	struct eficonfig_select_file_info initrd_info;
> +	unsigned int boot_index;
> +	u16 *description;
> +	u16 *optional_data;
> +	bool edit_completed;
> +};
> +
> +/**
> + * struct eficonfig_volume_entry_data - structure to be used to store volume info
> + *
> + * @file_info:	pointer to file info structure
> + * @v:		pointer to the protocol interface
> + * @dp:		pointer to the device path
> + */
> +struct eficonfig_volume_entry_data {
> +	struct eficonfig_select_file_info *file_info;
> +	struct efi_simple_file_system_protocol *v;
> +	struct efi_device_path *dp;
> +};
> +
> +/**
> + * struct eficonfig_file_entry_data - structure to be used to store file info
> + *
> + * @file_info:		pointer to file info structure
> + * @is_directory:	flag to identify the directory or file
> + * @file_name:		name of directory or file
> + */
> +struct eficonfig_file_entry_data {
> +	struct eficonfig_select_file_info *file_info;
> +	bool is_directory;
> +	u16 *file_name;
> +};
> +
> +/**
> + * eficonfig_print_msg() - print message
> + *
> + * display the message to the user, user proceeds the screen
> + * with any key press.
> + *
> + * @items:		pointer to the structure of each menu entry
> + * @count:		the number of menu entry
> + * @menu_header:	pointer to the menu header string
> + * Return:	status code
> + */
> +void eficonfig_print_msg(char *msg)
> +{
> +	/* Flush input */
> +	while (tstc())
> +		getchar();
> +
> +	printf(ANSI_CURSOR_HIDE
> +	       ANSI_CLEAR_CONSOLE
> +	       ANSI_CURSOR_POSITION
> +	       "%s\n\n  Press any key to continue", 3, 4, msg);
> +
> +	getchar();
> +}
> +
> +/**
> + * eficonfig_print_entry() - print each menu entry
> + *
> + * @data:	pointer to the data associated with each menu entry
> + */
> +static void eficonfig_print_entry(void *data)
> +{
> +	struct eficonfig_entry *entry = data;
> +	int reverse = (entry->efi_menu->active == entry->num);
> +
> +	/* TODO: support scroll or page for many entries */
> +
> +	/*
> +	 * Move cursor to line where the entry will be drawn (entry->num)
> +	 * First 3 lines(menu header) + 1 empty line
> +	 */
> +	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> +
> +	if (reverse)
> +		puts(ANSI_COLOR_REVERSE);
> +
> +	printf("%s", entry->title);
> +
> +	if (reverse)
> +		puts(ANSI_COLOR_RESET);
> +}
> +
> +/**
> + * eficonfig_display_statusline() - print status line
> + *
> + * @m:	pointer to the menu structure
> + */
> +static void eficonfig_display_statusline(struct menu *m)
> +{
> +	struct eficonfig_entry *entry;
> +
> +	if (menu_default_choice(m, (void *)&entry) < 0)
> +		return;
> +
> +	printf(ANSI_CURSOR_POSITION
> +	      "\n%s\n"
> +	       ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
> +	       "  Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit"
> +	       ANSI_CLEAR_LINE_TO_END ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
> +	       1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
> +	       entry->efi_menu->count + 6, 1, entry->efi_menu->count + 7, 1);
> +}
> +
> +/**
> + * eficonfig_choice_entry() - user key input handler
> + *
> + * @data:	pointer to the efimenu structure
> + * Return:	key string to identify the selected entry
> + */
> +static char *eficonfig_choice_entry(void *data)
> +{
> +	int esc = 0;
> +	struct list_head *pos, *n;
> +	struct eficonfig_entry *entry;
> +	enum bootmenu_key key = KEY_NONE;
> +	struct efimenu *efi_menu = data;
> +
> +	while (1) {
> +		bootmenu_loop((struct bootmenu_data *)efi_menu, &key, &esc);
> +
> +		switch (key) {
> +		case KEY_UP:
> +			if (efi_menu->active > 0)
> +				--efi_menu->active;
> +			/* no menu key selected, regenerate menu */
> +			return NULL;
> +		case KEY_DOWN:
> +			if (efi_menu->active < efi_menu->count - 1)
> +				++efi_menu->active;
> +			/* no menu key selected, regenerate menu */
> +			return NULL;
> +		case KEY_SELECT:
> +			list_for_each_safe(pos, n, &efi_menu->list) {
> +				entry = list_entry(pos, struct eficonfig_entry, list);
> +				if (entry->num == efi_menu->active)
> +					return entry->key;
> +			}
> +			break;
> +		case KEY_QUIT:
> +			/* Quit by choosing the last entry */
> +			entry = list_last_entry(&efi_menu->list, struct eficonfig_entry, list);
> +			return entry->key;
> +		default:
> +			/* Pressed key is not valid, no need to regenerate the menu */
> +			break;
> +		}
> +	}
> +}
> +
> +/**
> + * eficonfig_destroy() - destroy efimenu
> + *
> + * @efi_menu:	pointer to the efimenu structure
> + */
> +void eficonfig_destroy(struct efimenu *efi_menu)
> +{
> +	struct list_head *pos, *n;
> +	struct eficonfig_entry *entry;
> +
> +	list_for_each_safe(pos, n, &efi_menu->list) {
> +		entry = list_entry(pos, struct eficonfig_entry, list);
> +		free(entry->title);
> +		list_del(&entry->list);
> +		free(entry);
> +	}
> +	free(efi_menu->menu_header);
> +	free(efi_menu);
> +}
> +
> +/**
> + * eficonfig_process_quit() - callback function for "Quit" entry
> + *
> + * @data:	pointer to the data
> + * Return:	status code
> + */
> +efi_status_t eficonfig_process_quit(void *data)
> +{
> +	return EFI_ABORTED;
> +}
> +
> +/**
> + * append_entry() - append menu item
> + *
> + * @efi_menu:	pointer to the efimenu structure
> + * @title:	pointer to the entry title
> + * @func:	callback of each entry
> + * @data:	pointer to the data to be passed to each entry callback
> + * Return:	status code
> + */
> +static efi_status_t append_entry(struct efimenu *efi_menu,
> +				 char *title, eficonfig_entry_func func, void *data)
> +{
> +	struct eficonfig_entry *entry;
> +
> +	if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	entry = calloc(1, sizeof(struct eficonfig_entry));
> +	if (!entry)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	entry->title = title;
> +	sprintf(entry->key, "%d", efi_menu->count);
> +	entry->efi_menu = efi_menu;
> +	entry->func = func;
> +	entry->data = data;
> +	entry->num = efi_menu->count++;
> +	list_add_tail(&entry->list, &efi_menu->list);
> +
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * append_quit_entry() - append quit entry
> + *
> + * @efi_menu:	pointer to the efimenu structure
> + * Return:	status code
> + */
> +static efi_status_t append_quit_entry(struct efimenu *efi_menu)
> +{
> +	char *title;
> +	efi_status_t ret;
> +
> +	title = strdup("Quit");
> +	if (!title)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	ret = append_entry(efi_menu, title, eficonfig_process_quit, NULL);
> +	if (ret != EFI_SUCCESS)
> +		free(title);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_create_fixed_menu() - create fixed entry menu structure
> + *
> + * @items:	pointer to the menu entry item
> + * @count:	the number of menu entry
> + * Return:	pointer to the efimenu structure
> + */
> +void *eficonfig_create_fixed_menu(const struct eficonfig_item *items, int count)
> +{
> +	u32 i;
> +	char *title;
> +	efi_status_t ret;
> +	struct efimenu *efi_menu;
> +	const struct eficonfig_item *iter = items;
> +
> +	efi_menu = calloc(1, sizeof(struct efimenu));
> +	if (!efi_menu)
> +		return NULL;
> +
> +	INIT_LIST_HEAD(&efi_menu->list);
> +	for (i = 0; i < count; i++, iter++) {
> +		title = strdup(iter->title);
> +		if (!title)
> +			goto out;
> +
> +		ret = append_entry(efi_menu, title, iter->func, iter->data);
> +		if (ret != EFI_SUCCESS) {
> +			free(title);
> +			goto out;
> +		}
> +	}
> +
> +	return efi_menu;
> +out:
> +	eficonfig_destroy(efi_menu);
> +
> +	return NULL;
> +}
> +
> +/**
> + * eficonfig_process_common() - main handler for UEFI menu
> + *
> + * Construct the structures required to show the menu, then handle
> + * the user input interacting with u-boot menu functions.
> + *
> + * @efi_menu:		pointer to the efimenu structure
> + * @menu_header:	pointer to the menu header string
> + * Return:		status code
> + */
> +efi_status_t eficonfig_process_common(struct efimenu *efi_menu, char *menu_header)
> +{
> +	struct menu *menu;
> +	void *choice = NULL;
> +	struct list_head *pos, *n;
> +	struct eficonfig_entry *entry;
> +	efi_status_t ret = EFI_SUCCESS;
> +
> +	if (efi_menu->count > EFICONFIG_ENTRY_NUM_MAX)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	efi_menu->delay = -1;
> +	efi_menu->active = 0;
> +
> +	if (menu_header) {
> +		efi_menu->menu_header = strdup(menu_header);

This does not build:

+cmd/eficonfig.c:380:7: error: variable 'menu' is used uninitialized
whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
+                if (!efi_menu->menu_header) {
+                    ^~~~~~~~~~~~~~~~~~~~~~
+cmd/eficonfig.c:416:15: note: uninitialized use occurs here
+        menu_destroy(menu);
+                     ^~~~
+cmd/eficonfig.c:380:3: note: remove the 'if' if its condition is always
false
+                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+cmd/eficonfig.c:366:19: note: initialize the variable 'menu' to silence
this warning
+        struct menu *menu;
+                         ^
+                          = NULL

Best regards

Heinrich

> +		if (!efi_menu->menu_header) {
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +	}
> +
> +	menu = menu_create(NULL, 0, 1, eficonfig_display_statusline,
> +			   eficonfig_print_entry, eficonfig_choice_entry,
> +			   efi_menu);
> +	if (!menu) {
> +		ret = EFI_INVALID_PARAMETER;
> +		goto out;
> +	}
> +
> +	list_for_each_safe(pos, n, &efi_menu->list) {
> +		entry = list_entry(pos, struct eficonfig_entry, list);
> +		if (!menu_item_add(menu, entry->key, entry)) {
> +			ret = EFI_INVALID_PARAMETER;
> +			goto out;
> +		}
> +	}
> +
> +	entry = list_first_entry_or_null(&efi_menu->list, struct eficonfig_entry, list);
> +	if (entry)
> +		menu_default_set(menu, entry->key);
> +
> +	printf(ANSI_CURSOR_HIDE
> +	       ANSI_CLEAR_CONSOLE
> +	       ANSI_CURSOR_POSITION, 1, 1);
> +
> +	if (menu_get_choice(menu, &choice)) {
> +		entry = choice;
> +		if (entry->func)
> +			ret = entry->func(entry->data);
> +	}
> +out:
> +	menu_destroy(menu);
> +
> +	printf(ANSI_CLEAR_CONSOLE
> +	       ANSI_CURSOR_POSITION
> +	       ANSI_CURSOR_SHOW, 1, 1);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_volume_selected() - handler of volume selection
> + *
> + * @data:	pointer to the data of selected entry
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_volume_selected(void *data)
> +{
> +	struct eficonfig_volume_entry_data *info = data;
> +
> +	if (info) {
> +		info->file_info->current_volume = info->v;
> +		info->file_info->dp_volume = info->dp;
> +	}
> +
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * create_selected_device_path() - create device path
> + *
> + * @file_info:	pointer to the selected file information
> + * Return:
> + * device path or NULL. Caller must free the returned value
> + */
> +static
> +struct efi_device_path *create_selected_device_path(struct eficonfig_select_file_info *file_info)
> +{
> +	char *p;
> +	void *buf;
> +	efi_uintn_t fp_size;
> +	struct efi_device_path *dp;
> +	struct efi_device_path_file_path *fp;
> +
> +	fp_size = sizeof(struct efi_device_path) +
> +		  ((u16_strlen(file_info->current_path) + 1) * sizeof(u16));
> +	buf = calloc(1, fp_size + sizeof(END));
> +	if (!buf)
> +		return NULL;
> +
> +	fp = buf;
> +	fp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
> +	fp->dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
> +	fp->dp.length = (u16)fp_size;
> +	u16_strcpy(fp->str, file_info->current_path);
> +
> +	p = buf;
> +	p += fp_size;
> +	*((struct efi_device_path *)p) = END;
> +
> +	dp = efi_dp_append(file_info->dp_volume, (struct efi_device_path *)buf);
> +	free(buf);
> +
> +	return dp;
> +}
> +
> +/**
> + * eficonfig_file_selected() - handler of file selection
> + *
> + * @data:	pointer to the data of selected entry
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_file_selected(void *data)
> +{
> +	struct eficonfig_file_entry_data *info = data;
> +
> +	if (!info)
> +		return EFI_INVALID_PARAMETER;
> +
> +	if (u16_strcmp(info->file_name, u".") == 0 &&
> +	    u16_strlen(info->file_name) == 1) {
> +		/* stay current path */
> +	} else if (u16_strcmp(info->file_name, u"..") == 0 &&
> +		   u16_strlen(info->file_name) == 2) {
> +		struct eficonfig_filepath_info *iter;
> +		struct list_head *pos, *n;
> +		int is_last;
> +
> +		memset(info->file_info->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> +		list_for_each_safe(pos, n, &info->file_info->filepath_list) {
> +			iter = list_entry(pos, struct eficonfig_filepath_info, list);
> +
> +			is_last = list_is_last(&iter->list, &info->file_info->filepath_list);
> +			if (is_last) {
> +				list_del(&iter->list);
> +				free(iter->name);
> +				free(iter);
> +				break;
> +			}
> +			u16_strlcat(info->file_info->current_path, iter->name,
> +				    EFICONFIG_FILE_PATH_MAX);
> +			u16_strlcat(info->file_info->current_path, u"\\",
> +				    EFICONFIG_FILE_PATH_MAX);
> +		}
> +	} else {
> +		size_t new_len;
> +		struct eficonfig_filepath_info *filepath;
> +
> +		new_len = u16_strlen(info->file_info->current_path) +
> +				     u16_strlen(info->file_name);
> +		if (new_len >= EFICONFIG_FILE_PATH_MAX) {
> +			eficonfig_print_msg("File path is too long!");
> +			return EFI_INVALID_PARAMETER;
> +		}
> +		u16_strlcat(info->file_info->current_path, info->file_name,
> +			    EFICONFIG_FILE_PATH_MAX);
> +
> +		filepath = calloc(1, sizeof(struct eficonfig_filepath_info));
> +		if (!filepath)
> +			return EFI_OUT_OF_RESOURCES;
> +
> +		filepath->name = u16_strdup(info->file_name);
> +		if (!filepath->name) {
> +			free(filepath);
> +			return EFI_OUT_OF_RESOURCES;
> +		}
> +		list_add_tail(&filepath->list, &info->file_info->filepath_list);
> +
> +		if (info->is_directory) {
> +			/*
> +			 * Remaining buffer should have enough space to contain u"\\" and
> +			 * at least one character for file name
> +			 */
> +			if (new_len + 2 >= EFICONFIG_FILE_PATH_MAX) {
> +				eficonfig_print_msg("Directory path is too long!");
> +				return EFI_INVALID_PARAMETER;
> +			}
> +			u16_strlcat(info->file_info->current_path, u"\\",
> +				    EFICONFIG_FILE_PATH_MAX);
> +		} else {
> +			info->file_info->file_selected = true;
> +		}
> +	}
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * eficonfig_select_volume() - construct the volume selection menu
> + *
> + * @file_info:	pointer to the file selection structure
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_select_volume(struct eficonfig_select_file_info *file_info)
> +{
> +	u32 i;
> +	efi_status_t ret;
> +	efi_uintn_t count;
> +	struct efimenu *efi_menu;
> +	struct list_head *pos, *n;
> +	struct efi_handler *handler;
> +	struct eficonfig_entry *entry;
> +	struct efi_device_path *device_path;
> +	efi_handle_t *volume_handles = NULL;
> +	struct efi_simple_file_system_protocol *v;
> +
> +	ret = efi_locate_handle_buffer_int(BY_PROTOCOL, &efi_simple_file_system_protocol_guid,
> +					   NULL, &count, (efi_handle_t **)&volume_handles);
> +	if (ret != EFI_SUCCESS) {
> +		eficonfig_print_msg("No block device found!");
> +		return ret;
> +	}
> +
> +	efi_menu = calloc(1, sizeof(struct efimenu));
> +	if (!efi_menu)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	INIT_LIST_HEAD(&efi_menu->list);
> +	for (i = 0; i < count; i++) {
> +		char *devname;
> +		struct efi_block_io *block_io;
> +		struct eficonfig_volume_entry_data *info;
> +
> +		if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX - 1)
> +			break;
> +
> +		ret = efi_search_protocol(volume_handles[i],
> +					  &efi_simple_file_system_protocol_guid, &handler);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +		ret = efi_protocol_open(handler, (void **)&v, efi_root, NULL,
> +					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +
> +		ret = efi_search_protocol(volume_handles[i], &efi_guid_device_path, &handler);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +		ret = efi_protocol_open(handler, (void **)&device_path,
> +					efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +
> +		ret = efi_search_protocol(volume_handles[i], &efi_block_io_guid, &handler);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +		ret = efi_protocol_open(handler, (void **)&block_io,
> +					efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +		if (ret != EFI_SUCCESS)
> +			continue;
> +
> +		info = calloc(1, sizeof(struct eficonfig_volume_entry_data));
> +		if (!info) {
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +
> +		devname = calloc(1, BOOTMENU_DEVICE_NAME_MAX);
> +		if (!devname) {
> +			free(info);
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +		ret = efi_disk_get_device_name(volume_handles[i], devname,
> +					       BOOTMENU_DEVICE_NAME_MAX);
> +		if (ret != EFI_SUCCESS) {
> +			free(info);
> +			goto out;
> +		}
> +
> +		info->v = v;
> +		info->dp = device_path;
> +		info->file_info = file_info;
> +		ret = append_entry(efi_menu, devname, eficonfig_volume_selected, info);
> +		if (ret != EFI_SUCCESS) {
> +			free(info);
> +			goto out;
> +		}
> +	}
> +
> +	ret = append_quit_entry(efi_menu);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = eficonfig_process_common(efi_menu, "  ** Select Volume **");
> +out:
> +	efi_free_pool(volume_handles);
> +	list_for_each_safe(pos, n, &efi_menu->list) {
> +		entry = list_entry(pos, struct eficonfig_entry, list);
> +		free(entry->data);
> +	}
> +	eficonfig_destroy(efi_menu);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_select_file() - construct the file selection menu
> + *
> + * @file_info:	pointer to the file selection structure
> + * @root:	pointer to the file handle
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_select_file(struct eficonfig_select_file_info *file_info,
> +					  struct efi_file_handle *root)
> +{
> +	efi_uintn_t len;
> +	efi_status_t ret;
> +	struct efimenu *efi_menu;
> +	struct efi_file_handle *f;
> +	struct efi_file_info *buf;
> +	struct list_head *pos, *n;
> +
> +	buf = calloc(1, sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE);
> +	if (!buf)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	while (!file_info->file_selected) {
> +		efi_menu = calloc(1, sizeof(struct efimenu));
> +		if (!efi_menu) {
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +		INIT_LIST_HEAD(&efi_menu->list);
> +
> +		ret = efi_file_open_int(root, &f, file_info->current_path, EFI_FILE_MODE_READ, 0);
> +		if (ret != EFI_SUCCESS) {
> +			eficonfig_print_msg("Reading volume failed!");
> +			ret = EFI_ABORTED;
> +			goto out;
> +		}
> +
> +		/* Read directory and construct menu structure */
> +		for (;;) {
> +			char *name, *p;
> +			int name_len;
> +			struct eficonfig_file_entry_data *info;
> +
> +			if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX - 1)
> +				break;
> +
> +			len = sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE;
> +			ret = efi_file_read_int(f, &len, buf);
> +			if (ret != EFI_SUCCESS || len == 0)
> +				break;
> +
> +			info = calloc(1, sizeof(struct eficonfig_file_entry_data));
> +			if (!info) {
> +				ret = EFI_OUT_OF_RESOURCES;
> +				goto err;
> +			}
> +
> +			if (buf->attribute & EFI_FILE_DIRECTORY) {
> +				/* append u'/' at the end of directory name */
> +				name_len = utf16_utf8_strlen(buf->file_name) + 2;
> +
> +				/* filter out u'.' */
> +				if (name_len == 3 && buf->file_name[0] == u'.') {
> +					free(info);
> +					continue;
> +				}
> +
> +				name = calloc(1, name_len);
> +				if (!name) {
> +					free(info);
> +					ret = EFI_OUT_OF_RESOURCES;
> +					goto err;
> +				}
> +				p = name;
> +				utf16_utf8_strcpy(&p, buf->file_name);
> +				name[u16_strlen(buf->file_name)] = u'/';
> +
> +				info->is_directory = true;
> +			} else {
> +				name_len = utf16_utf8_strlen(buf->file_name) + 1;
> +				name = calloc(1, name_len);
> +				if (!name) {
> +					free(info);
> +					ret = EFI_OUT_OF_RESOURCES;
> +					goto err;
> +				}
> +				p = name;
> +				utf16_utf8_strcpy(&p, buf->file_name);
> +			}
> +
> +			info->file_name = u16_strdup(buf->file_name);
> +			if (!info->file_name) {
> +				free(info);
> +				free(name);
> +				ret = EFI_OUT_OF_RESOURCES;
> +				goto err;
> +			}
> +
> +			info->file_info = file_info;
> +			ret = append_entry(efi_menu, name, eficonfig_file_selected, info);
> +			if (ret != EFI_SUCCESS) {
> +				free(info);
> +				free(name);
> +				goto err;
> +			}
> +		}
> +
> +		ret = append_quit_entry(efi_menu);
> +		if (ret != EFI_SUCCESS)
> +			goto err;
> +
> +		ret = eficonfig_process_common(efi_menu, "  ** Select File **");
> +err:
> +		efi_file_close_int(f);
> +		list_for_each_safe(pos, n, &efi_menu->list) {
> +			struct eficonfig_entry *entry;
> +
> +			entry = list_entry(pos, struct eficonfig_entry, list);
> +			/* skip "Quit" */
> +			if (list_is_last(&entry->list, &efi_menu->list))
> +				break;
> +
> +			free(((struct eficonfig_file_entry_data *)(entry->data))->file_name);
> +			free(entry->data);
> +		}
> +		eficonfig_destroy(efi_menu);
> +		if (ret != EFI_SUCCESS)
> +			break;
> +	}
> +
> +out:
> +	free(buf);
> +	return ret;
> +}
> +
> +/**
> + * handle_user_input() - handle user input
> + *
> + * @buf:	pointer to the buffer
> + * @buf_size:	size of the buffer
> + * @cursor_col:	cursor column for user input
> + * @msg:	pointer to the string to display
> + * Return:	status code
> + */
> +static efi_status_t handle_user_input(u16 *buf, int buf_size,
> +				      int cursor_col, char *msg)
> +{
> +	u16 *tmp;
> +	efi_status_t ret;
> +
> +	printf(ANSI_CLEAR_CONSOLE
> +	       ANSI_CURSOR_POSITION
> +	       "%s"
> +	       ANSI_CURSOR_POSITION
> +	       "  Press ENTER to complete, ESC/CTRL+C to quit",
> +	       0, 1, msg, 8, 1);
> +
> +	/* tmp is used to accept user cancel */
> +	tmp = calloc(1, buf_size * sizeof(u16));
> +	if (!tmp)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	ret = efi_console_get_u16_string(cin, tmp, buf_size, NULL, 4, cursor_col);
> +	if (ret == EFI_SUCCESS)
> +		u16_strcpy(buf, tmp);
> +
> +	free(tmp);
> +
> +	/* to stay the parent menu */
> +	ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_boot_add_enter_description() - handle user input for description
> + *
> + * @data:	pointer to the internal boot option structure
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_boot_add_enter_description(void *data)
> +{
> +	struct eficonfig_boot_option *bo = data;
> +
> +	return handle_user_input(bo->description, EFICONFIG_DESCRIPTION_MAX, 22,
> +				 "\n  ** Edit Description **\n"
> +				 "\n"
> +				 "  enter description: ");
> +}
> +
> +/**
> + * eficonfig_boot_add_optional_data() - handle user input for optional data
> + *
> + * @data:	pointer to the internal boot option structure
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_boot_add_optional_data(void *data)
> +{
> +	struct eficonfig_boot_option *bo = data;
> +
> +	return handle_user_input(bo->optional_data, EFICONFIG_OPTIONAL_DATA_MAX, 24,
> +				 "\n  ** Edit Optional Data **\n"
> +				 "\n"
> +				 "  enter optional data:");
> +}
> +
> +/**
> + * eficonfig_boot_edit_save() - handler to save the boot option
> + *
> + * @data:	pointer to the internal boot option structure
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_boot_edit_save(void *data)
> +{
> +	struct eficonfig_boot_option *bo = data;
> +
> +	if (u16_strlen(bo->description) == 0) {
> +		eficonfig_print_msg("Boot Description is empty!");
> +		bo->edit_completed = false;
> +		return EFI_NOT_READY;
> +	}
> +	if (u16_strlen(bo->file_info.current_path) == 0) {
> +		eficonfig_print_msg("File is not selected!");
> +		bo->edit_completed = false;
> +		return EFI_NOT_READY;
> +	}
> +
> +	bo->edit_completed = true;
> +
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * eficonfig_process_select_file() - callback function for "Select File" entry
> + *
> + * @data:	pointer to the data
> + * Return:	status code
> + */
> +efi_status_t eficonfig_process_select_file(void *data)
> +{
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * eficonfig_process_clear_file_selection() - callback function for "Clear" entry
> + *
> + * @data:	pointer to the data
> + * Return:	status code
> + */
> +efi_status_t eficonfig_process_clear_file_selection(void *data)
> +{
> +	struct eficonfig_select_file_info *file_info = data;
> +
> +	/* clear the existing file information */
> +	file_info->current_volume = NULL;
> +	file_info->current_path[0] = u'\0';
> +	file_info->dp_volume = NULL;
> +
> +	return EFI_ABORTED;
> +}
> +
> +static struct eficonfig_item select_file_menu_items[] = {
> +	{"Select File", eficonfig_process_select_file},
> +	{"Clear", eficonfig_process_clear_file_selection},
> +	{"Quit", eficonfig_process_quit},
> +};
> +
> +
> +/**
> + * eficonfig_display_select_file_option() - display select file option
> + *
> + * @file_info:	pointer to the file information structure
> + * Return:	status code
> + */
> +efi_status_t eficonfig_display_select_file_option(struct eficonfig_select_file_info *file_info)
> +{
> +	efi_status_t ret;
> +	struct efimenu *efi_menu;
> +
> +	select_file_menu_items[1].data = file_info;
> +	efi_menu = eficonfig_create_fixed_menu(select_file_menu_items,
> +					       ARRAY_SIZE(select_file_menu_items));
> +	if (!efi_menu)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	ret = eficonfig_process_common(efi_menu, "  ** Update File **");
> +	if (ret != EFI_SUCCESS) /* User selects "Clear" or "Quit" */
> +		ret = EFI_NOT_READY;
> +
> +	eficonfig_destroy(efi_menu);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_select_file_handler() - handle user file selection
> + *
> + * @data:	pointer to the data
> + * Return:	status code
> + */
> +efi_status_t eficonfig_select_file_handler(void *data)
> +{
> +	size_t len;
> +	efi_status_t ret;
> +	struct list_head *pos, *n;
> +	struct efi_file_handle *root;
> +	struct eficonfig_filepath_info *item;
> +	struct eficonfig_select_file_info *tmp = NULL;
> +	struct eficonfig_select_file_info *file_info = data;
> +
> +	ret = eficonfig_display_select_file_option(file_info);
> +	if (ret != EFI_SUCCESS)
> +		return ret;
> +
> +	tmp = calloc(1, sizeof(struct eficonfig_select_file_info));
> +	if (!tmp)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	tmp->current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> +	if (!tmp->current_path) {
> +		free(tmp);
> +		return EFI_OUT_OF_RESOURCES;
> +	}
> +	INIT_LIST_HEAD(&tmp->filepath_list);
> +
> +	while (!tmp->file_selected) {
> +		tmp->current_volume = NULL;
> +		memset(tmp->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> +
> +		ret = eficonfig_select_volume(tmp);
> +		if (ret != EFI_SUCCESS)
> +			goto out;
> +
> +		if (!tmp->current_volume)
> +			return EFI_INVALID_PARAMETER;
> +
> +		ret = efi_open_volume_int(tmp->current_volume, &root);
> +		if (ret != EFI_SUCCESS)
> +			goto out;
> +
> +		ret = eficonfig_select_file(tmp, root);
> +		if (ret == EFI_ABORTED)
> +			continue;
> +		if (ret != EFI_SUCCESS)
> +			goto out;
> +	}
> +
> +out:
> +	if (ret == EFI_SUCCESS) {
> +		len = u16_strlen(tmp->current_path);
> +		len = (len >= EFICONFIG_FILE_PATH_MAX) ? (EFICONFIG_FILE_PATH_MAX - 1) : len;
> +		memcpy(file_info->current_path, tmp->current_path, len * sizeof(u16));
> +		file_info->current_path[len] = u'\0';
> +		file_info->current_volume = tmp->current_volume;
> +		file_info->dp_volume = tmp->dp_volume;
> +	}
> +
> +	list_for_each_safe(pos, n, &tmp->filepath_list) {
> +		item = list_entry(pos, struct eficonfig_filepath_info, list);
> +		list_del(&item->list);
> +		free(item->name);
> +		free(item);
> +	}
> +	free(tmp->current_path);
> +	free(tmp);
> +
> +	/* to stay the parent menu */
> +	ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_get_unused_bootoption() - get unused "Boot####" index
> + *
> + * @buf:	pointer to the buffer to store boot option variable name
> + * @buf_size:	buffer size
> + * @index:	pointer to store the index in the BootOrder variable
> + * Return:	status code
> + */
> +efi_status_t eficonfig_get_unused_bootoption(u16 *buf, efi_uintn_t buf_size,
> +					     unsigned int *index)
> +{
> +	u32 i;
> +	efi_status_t ret;
> +	efi_uintn_t size;
> +
> +	if (buf_size < u16_strsize(u"Boot####"))
> +		return EFI_BUFFER_TOO_SMALL;
> +
> +	for (i = 0; i <= 0xFFFF; i++) {
> +		size = 0;
> +		efi_create_indexed_name(buf, buf_size, "Boot", i);
> +		ret = efi_get_variable_int(buf, &efi_global_variable_guid,
> +					   NULL, &size, NULL, NULL);
> +		if (ret == EFI_BUFFER_TOO_SMALL)
> +			continue;
> +		else
> +			break;
> +	}
> +
> +	if (i > 0xFFFF)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	*index = i;
> +
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * eficonfig_set_boot_option() - set boot option
> + *
> + * @varname:		pointer to variable name
> + * @dp:			pointer to device path
> + * @label:		pointer to label string
> + * @optional_data:	pointer to optional data
> + * Return:		status code
> + */
> +static efi_status_t eficonfig_set_boot_option(u16 *varname, struct efi_device_path *dp,
> +					      efi_uintn_t dp_size, u16 *label, char *optional_data)
> +{
> +	void *p = NULL;
> +	efi_status_t ret;
> +	efi_uintn_t size;
> +	struct efi_load_option lo;
> +
> +	lo.file_path = dp;
> +	lo.file_path_length = dp_size;
> +	lo.attributes = LOAD_OPTION_ACTIVE;
> +	lo.optional_data = optional_data;
> +	lo.label = label;
> +
> +	size = efi_serialize_load_option(&lo, (u8 **)&p);
> +	if (!size)
> +		return EFI_INVALID_PARAMETER;
> +
> +	ret = efi_set_variable_int(varname, &efi_global_variable_guid,
> +				   EFI_VARIABLE_NON_VOLATILE |
> +				   EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +				   EFI_VARIABLE_RUNTIME_ACCESS,
> +				   size, p, false);
> +	free(p);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_append_bootorder() - append new boot option in BootOrder variable
> + *
> + * @index:	"Boot####" index to append to BootOrder variable
> + * Return:	status code
> + */
> +efi_status_t eficonfig_append_bootorder(u16 index)
> +{
> +	u16 *bootorder;
> +	efi_status_t ret;
> +	u16 *new_bootorder = NULL;
> +	efi_uintn_t last, size, new_size;
> +
> +	/* append new boot option */
> +	bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
> +	last = size / sizeof(u16);
> +	new_size = size + sizeof(u16);
> +	new_bootorder = calloc(1, new_size);
> +	if (!new_bootorder) {
> +		ret = EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +	memcpy(new_bootorder, bootorder, size);
> +	new_bootorder[last] = index;
> +
> +	ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,
> +				   EFI_VARIABLE_NON_VOLATILE |
> +				   EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +				   EFI_VARIABLE_RUNTIME_ACCESS,
> +				   new_size, new_bootorder, false);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +out:
> +	free(bootorder);
> +	free(new_bootorder);
> +
> +	return ret;
> +}
> +
> +/**
> + * create_boot_option_entry() - create boot option entry
> + *
> + * @efi_menu:	pointer to the efimenu structure
> + * @title:	pointer to the entry title
> + * @val:	pointer to boot option label
> + * @func:	callback of each entry
> + * @data:	pointer to the data to be passed to each entry callback
> + * Return:	status code
> + */
> +static efi_status_t create_boot_option_entry(struct efimenu *efi_menu, char *title, u16 *val,
> +					     eficonfig_entry_func func, void *data)
> +{
> +	u32 len;
> +	char *p, *buf;
> +
> +	len = strlen(title) + 1;
> +	if (val)
> +		len += utf16_utf8_strlen(val);
> +	buf = calloc(1, len);
> +	if (!buf)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	strcpy(buf, title);
> +	if (val) {
> +		p = buf + strlen(title);
> +		utf16_utf8_strcpy(&p, val);
> +	}
> +
> +	return append_entry(efi_menu, buf, func, data);
> +}
> +
> +/**
> + * prepare_file_selection_entry() - prepare file selection entry
> + *
> + * @efi_menu:	pointer to the efimenu structure
> + * @title:	pointer to the title string
> + * @file_info:	pointer to the file info
> + * Return:	status code
> + */
> +static efi_status_t prepare_file_selection_entry(struct efimenu *efi_menu, char *title,
> +						 struct eficonfig_select_file_info *file_info)
> +{
> +	u32 len;
> +	efi_status_t ret;
> +	u16 *file_name, *p;
> +	efi_handle_t handle;
> +	char devname[BOOTMENU_DEVICE_NAME_MAX] = {0};
> +
> +	/* get the device name only when the user already selected the file path */
> +	handle = efi_dp_find_obj(file_info->dp_volume, NULL, NULL);
> +	if (handle) {
> +		ret = efi_disk_get_device_name(handle, devname, BOOTMENU_DEVICE_NAME_MAX);
> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +	}
> +
> +	/* append u'/' to devname, it is just for display purpose. */
> +	if (file_info->current_path[0] != u'\0' && file_info->current_path[0] != u'/')
> +		strlcat(devname, "/", BOOTMENU_DEVICE_NAME_MAX);
> +
> +	len = strlen(devname);
> +	len += utf16_utf8_strlen(file_info->current_path) + 1;
> +	file_name = calloc(1, len * sizeof(u16));
> +	if (!file_name)
> +		return ret;
> +
> +	p = file_name;
> +	utf8_utf16_strcpy(&p, devname);
> +	u16_strlcat(file_name, file_info->current_path, len);
> +	ret = create_boot_option_entry(efi_menu, title, file_name,
> +				       eficonfig_select_file_handler, file_info);
> +	free(file_name);
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_show_boot_option() - prepare menu entry for editing boot option
> + *
> + * Construct the structures to create edit boot option menu
> + *
> + * @bo:		pointer to the boot option
> + * @header_str:	pointer to the header string
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_show_boot_option(struct eficonfig_boot_option *bo,
> +					       char *header_str)
> +{
> +	efi_status_t ret;
> +	struct efimenu *efi_menu;
> +
> +	efi_menu = calloc(1, sizeof(struct efimenu));
> +	if (!efi_menu)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	INIT_LIST_HEAD(&efi_menu->list);
> +
> +	ret = create_boot_option_entry(efi_menu, "Description: ", bo->description,
> +				       eficonfig_boot_add_enter_description, bo);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = prepare_file_selection_entry(efi_menu, "File: ", &bo->file_info);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = prepare_file_selection_entry(efi_menu, "Initrd File: ", &bo->initrd_info);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = create_boot_option_entry(efi_menu, "Optional Data: ", bo->optional_data,
> +				       eficonfig_boot_add_optional_data, bo);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = create_boot_option_entry(efi_menu, "Save", NULL,
> +				       eficonfig_boot_edit_save, bo);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = create_boot_option_entry(efi_menu, "Quit", NULL,
> +				       eficonfig_process_quit, NULL);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = eficonfig_process_common(efi_menu, header_str);
> +out:
> +	eficonfig_destroy(efi_menu);
> +
> +	return ret;
> +}
> +
> +/**
> + * fill_file_info() - fill the file info from efi_device_path structure
> + *
> + * @dp:		pointer to the device path
> + * @file_info:	pointer to the file info structure
> + * @device_dp:	pointer to the volume device path
> + */
> +static void fill_file_info(struct efi_device_path *dp,
> +			   struct eficonfig_select_file_info *file_info,
> +			   struct efi_device_path *device_dp)
> +{
> +	u16 *file_str, *p;
> +	struct efi_device_path *file_dp = NULL;
> +
> +	efi_dp_split_file_path(dp, &device_dp, &file_dp);
> +	file_info->dp_volume = device_dp;
> +
> +	if (file_dp) {
> +		file_str = efi_dp_str(file_dp);
> +		/*
> +		 * efi_convert_device_path_to_text() automatically adds u'/' at the
> +		 * beginning of file name, remove u'/' before copying to current_path
> +		 */
> +		p = file_str;
> +		if (p[0] == u'/')
> +			p++;
> +
> +		u16_strcpy(file_info->current_path, p);
> +		efi_free_pool(file_dp);
> +		efi_free_pool(file_str);
> +	}
> +}
> +
> +/**
> + * eficonfig_edit_boot_option() - prepare boot option structure for editing
> + *
> + * Construct the boot option structure and copy the existing value
> + *
> + * @varname:		pointer to the UEFI variable name
> + * @bo:			pointer to the boot option
> + * @load_option:	pointer to the load option
> + * @load_option_size:	size of the load option
> + * @header_str:		pointer to the header string
> + * Return	:	status code
> + */
> +static efi_status_t eficonfig_edit_boot_option(u16 *varname, struct eficonfig_boot_option *bo,
> +					       void *load_option, efi_uintn_t load_option_size,
> +					       char *header_str)
> +{
> +	size_t len;
> +	efi_status_t ret;
> +	char *tmp = NULL, *p;
> +	struct efi_load_option lo = {0};
> +	efi_uintn_t final_dp_size;
> +	struct efi_device_path *dp = NULL;
> +	efi_uintn_t size = load_option_size;
> +	struct efi_device_path *final_dp = NULL;
> +	struct efi_device_path *device_dp = NULL;
> +	struct efi_device_path *initrd_dp = NULL;
> +	struct efi_device_path *initrd_device_dp = NULL;
> +
> +	const struct efi_initrd_dp id_dp = {
> +		.vendor = {
> +			{
> +			DEVICE_PATH_TYPE_MEDIA_DEVICE,
> +			DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
> +			sizeof(id_dp.vendor),
> +			},
> +			EFI_INITRD_MEDIA_GUID,
> +		},
> +		.end = {
> +			DEVICE_PATH_TYPE_END,
> +			DEVICE_PATH_SUB_TYPE_END,
> +			sizeof(id_dp.end),
> +		}
> +	};
> +
> +	bo->file_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> +	if (!bo->file_info.current_path) {
> +		ret =  EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +
> +	bo->initrd_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> +	if (!bo->file_info.current_path) {
> +		ret =  EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +
> +	bo->description = calloc(1, EFICONFIG_DESCRIPTION_MAX * sizeof(u16));
> +	if (!bo->description) {
> +		ret =  EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +
> +	bo->optional_data = calloc(1, EFICONFIG_OPTIONAL_DATA_MAX * sizeof(u16));
> +	if (!bo->optional_data) {
> +		ret =  EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +
> +	/* copy the preset value */
> +	if (load_option) {
> +		ret = efi_deserialize_load_option(&lo, load_option, &size);
> +		if (ret != EFI_SUCCESS)
> +			goto out;
> +
> +		if (!lo.label || (lo.label && u16_strlen(lo.label) >= EFICONFIG_DESCRIPTION_MAX)) {
> +			ret = EFI_INVALID_PARAMETER;
> +			goto out;
> +		}
> +		u16_strcpy(bo->description, lo.label);
> +
> +		/* EFI image file path is a first instance */
> +		if (lo.file_path)
> +			fill_file_info(lo.file_path, &bo->file_info, device_dp);
> +
> +		/* Initrd file path(optional) is placed at second instance. */
> +		initrd_dp = efi_dp_from_lo(&lo, &efi_lf2_initrd_guid);
> +		if (initrd_dp) {
> +			fill_file_info(initrd_dp, &bo->initrd_info, initrd_device_dp);
> +			efi_free_pool(initrd_dp);
> +		}
> +
> +		if (size > 0)
> +			memcpy(bo->optional_data, lo.optional_data, size);
> +	}
> +
> +	while (1) {
> +		ret = eficonfig_show_boot_option(bo, header_str);
> +		if (ret == EFI_SUCCESS && bo->edit_completed)
> +			break;
> +		if (ret == EFI_NOT_READY)
> +			continue;
> +		if (ret != EFI_SUCCESS)
> +			goto out;
> +	}
> +
> +	if (bo->initrd_info.dp_volume) {
> +		dp = create_selected_device_path(&bo->initrd_info);
> +		if (!dp) {
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +		initrd_dp = efi_dp_append((const struct efi_device_path *)&id_dp, dp);
> +		efi_free_pool(dp);
> +	}
> +
> +	dp = create_selected_device_path(&bo->file_info);
> +	if (!dp) {
> +		ret = EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +	final_dp_size = efi_dp_size(dp) + sizeof(END);
> +	if (initrd_dp) {
> +		final_dp = efi_dp_concat(dp, initrd_dp);
> +		final_dp_size += efi_dp_size(initrd_dp) + sizeof(END);
> +	} else {
> +		final_dp = efi_dp_dup(dp);
> +	}
> +	efi_free_pool(dp);
> +
> +	if (!final_dp)
> +		goto out;
> +
> +	if (utf16_utf8_strlen(bo->optional_data)) {
> +		len = utf16_utf8_strlen(bo->optional_data) + 1;
> +		tmp = calloc(1, len);
> +		if (!tmp)
> +			goto out;
> +		p = tmp;
> +		utf16_utf8_strncpy(&p, bo->optional_data, u16_strlen(bo->optional_data));
> +	}
> +
> +	ret = eficonfig_set_boot_option(varname, final_dp, final_dp_size, bo->description, tmp);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +out:
> +	free(tmp);
> +	free(bo->optional_data);
> +	free(bo->description);
> +	free(bo->file_info.current_path);
> +	free(bo->initrd_info.current_path);
> +	efi_free_pool(device_dp);
> +	efi_free_pool(initrd_device_dp);
> +	efi_free_pool(initrd_dp);
> +	efi_free_pool(final_dp);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_process_add_boot_option() - handler to add boot option
> + *
> + * @data:	pointer to the data for each entry
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_process_add_boot_option(void *data)
> +{
> +	u16 varname[9];
> +	efi_status_t ret;
> +	struct eficonfig_boot_option *bo = NULL;
> +
> +	bo = calloc(1, sizeof(struct eficonfig_boot_option));
> +	if (!bo)
> +		return EFI_OUT_OF_RESOURCES;
> +
> +	ret = eficonfig_get_unused_bootoption(varname, sizeof(varname), &bo->boot_index);
> +	if (ret != EFI_SUCCESS)
> +		return ret;
> +
> +	ret = eficonfig_edit_boot_option(varname, bo, NULL, 0,  "  ** Add Boot Option ** ");
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	ret = eficonfig_append_bootorder((u16)bo->boot_index);
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +out:
> +	free(bo);
> +
> +	/* to stay the parent menu */
> +	ret = (ret == EFI_ABORTED) ? EFI_SUCCESS : ret;
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_init() - do required initialization for eficonfig command
> + *
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_init(void)
> +{
> +	efi_status_t ret = EFI_SUCCESS;
> +	static bool init;
> +	struct efi_handler *handler;
> +
> +	if (!init) {
> +		ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +
> +		ret = efi_protocol_open(handler, (void **)&cin, efi_root, NULL,
> +					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +	}
> +
> +	init = true;
> +
> +	return ret;
> +}
> +
> +static const struct eficonfig_item maintenance_menu_items[] = {
> +	{"Add Boot Option", eficonfig_process_add_boot_option},
> +	{"Quit", eficonfig_process_quit},
> +};
> +
> +/**
> + * do_eficonfig() - execute `eficonfig` command
> + *
> + * @cmdtp:	table entry describing command
> + * @flag:	bitmap indicating how the command was invoked
> + * @argc:	number of arguments
> + * @argv:	command line arguments
> + * Return:	status code
> + */
> +static int do_eficonfig(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> +{
> +	efi_status_t ret;
> +	struct efimenu *efi_menu;
> +
> +	if (argc > 1)
> +		return CMD_RET_USAGE;
> +
> +	ret = efi_init_obj_list();
> +	if (ret != EFI_SUCCESS) {
> +		log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
> +			ret & ~EFI_ERROR_MASK);
> +
> +		return CMD_RET_FAILURE;
> +	}
> +
> +	ret = eficonfig_init();
> +	if (ret != EFI_SUCCESS)
> +		return CMD_RET_FAILURE;
> +
> +	while (1) {
> +		efi_menu = eficonfig_create_fixed_menu(maintenance_menu_items,
> +						       ARRAY_SIZE(maintenance_menu_items));
> +		if (!efi_menu)
> +			return CMD_RET_FAILURE;
> +
> +		ret = eficonfig_process_common(efi_menu, "  ** UEFI Maintenance Menu **");
> +		eficonfig_destroy(efi_menu);
> +
> +		if (ret == EFI_ABORTED)
> +			break;
> +	}
> +
> +	return CMD_RET_SUCCESS;
> +}
> +
> +U_BOOT_CMD(
> +	eficonfig, 1, 0, do_eficonfig,
> +	"provide menu-driven UEFI variable maintenance interface",
> +	""
> +);
> diff --git a/include/efi_config.h b/include/efi_config.h
> new file mode 100644
> index 0000000000..ea5bc4e1bf
> --- /dev/null
> +++ b/include/efi_config.h
> @@ -0,0 +1,96 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + *  Menu-driven UEFI Variable maintenance
> + *
> + *  Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> + */
> +
> +#ifndef _EFI_CONFIG_H
> +#define _EFI_CONFIG_H
> +
> +#include <efi_loader.h>
> +
> +#define EFICONFIG_ENTRY_NUM_MAX 99
> +#define EFICONFIG_FILE_PATH_MAX 512
> +#define EFICONFIG_FILE_PATH_BUF_SIZE (EFICONFIG_FILE_PATH_MAX * sizeof(u16))
> +
> +typedef efi_status_t (*eficonfig_entry_func)(void *data);
> +
> +/**
> + * struct eficonfig_entry - menu entry structure
> + *
> + * @num:	menu entry index
> + * @title:	title of entry
> + * @key:	unique key
> + * @efi_menu:	pointer to the menu structure
> + * @func:	callback function to be called when this entry is selected
> + * @data:	data to be passed to the callback function, caller must free() this pointer
> + * @list:	list structure
> + */
> +struct eficonfig_entry {
> +	u32 num;
> +	char *title;
> +	char key[3];
> +	struct efimenu *efi_menu;
> +	eficonfig_entry_func func;
> +	void *data;
> +	struct list_head list;
> +};
> +
> +/**
> + * struct efimenu - efi menu structure
> + *
> + * @delay:		delay for autoboot
> + * @active:		active menu entry index
> + * @count:		total count of menu entry
> + * @menu_header:	menu header string
> + * @list:		menu entry list structure
> + */
> +struct efimenu {
> +	int delay;
> +	int active;
> +	int count;
> +	char *menu_header;
> +	struct list_head list;
> +};
> +
> +/**
> + * struct eficonfig_item - structure to construct eficonfig_entry
> + *
> + * @title:	title of entry
> + * @func:	callback function to be called when this entry is selected
> + * @data:	data to be passed to the callback function
> + */
> +struct eficonfig_item {
> +	char *title;
> +	eficonfig_entry_func func;
> +	void *data;
> +};
> +
> +/**
> + * struct eficonfig_select_file_info - structure to be used for file selection
> + *
> + * @current_volume:	pointer to the efi_simple_file_system_protocol
> + * @dp_volume:		pointer to device path of the selected device
> + * @current_path:	pointer to the selected file path string
> + * @filepath_list:	list_head structure for file path list
> + * @file_selectred:	flag indicates file selecting status
> + */
> +struct eficonfig_select_file_info {
> +	struct efi_simple_file_system_protocol *current_volume;
> +	struct efi_device_path *dp_volume;
> +	u16 *current_path;
> +	struct list_head filepath_list;
> +	bool file_selected;
> +};
> +
> +void eficonfig_print_msg(char *msg);
> +void eficonfig_destroy(struct efimenu *efi_menu);
> +efi_status_t eficonfig_process_quit(void *data);
> +efi_status_t eficonfig_process_common(struct efimenu *efi_menu, char *menu_header);
> +efi_status_t eficonfig_select_file_handler(void *data);
> +efi_status_t eficonfig_get_unused_bootoption(u16 *buf,
> +					     efi_uintn_t buf_size, u32 *index);
> +efi_status_t eficonfig_append_bootorder(u16 index);
> +
> +#endif
> diff --git a/include/efi_loader.h b/include/efi_loader.h
> index b0d6fff67c..4461f721e0 100644
> --- a/include/efi_loader.h
> +++ b/include/efi_loader.h
> @@ -142,6 +142,11 @@ static inline efi_status_t efi_launch_capsules(void)
>   	EFI_GUID(0x63293792, 0xadf5, 0x9325, \
>   		 0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
>
> +/* GUID for the auto generated boot menu entry */
> +#define EFICONFIG_AUTO_GENERATED_ENTRY_GUID \
> +	EFI_GUID(0x38c1acc1, 0x9fc0, 0x41f0, \
> +		 0xb9, 0x01, 0xfa, 0x74, 0xd6, 0xd6, 0xe4, 0xde)
> +
>   /* Use internal device tree when starting UEFI application */
>   #define EFI_FDT_USE_INTERNAL NULL
>
> @@ -226,6 +231,9 @@ const char *__efi_nesting_dec(void);
>   #define EFI_CACHELINE_SIZE 128
>   #endif
>
> +/* max bootmenu title size for volume selection */
> +#define BOOTMENU_DEVICE_NAME_MAX 16
> +
>   /* Key identifying current memory map */
>   extern efi_uintn_t efi_memory_map_key;
>
> @@ -249,6 +257,9 @@ extern const struct efi_hii_string_protocol efi_hii_string;
>
>   uint16_t *efi_dp_str(struct efi_device_path *dp);
>
> +/* GUID for the auto generated boot menu entry */
> +extern const efi_guid_t efi_guid_bootmenu_auto_generated;
> +
>   /* GUID of the U-Boot root node */
>   extern const efi_guid_t efi_u_boot_guid;
>   #ifdef CONFIG_SANDBOX
> @@ -314,6 +325,8 @@ extern const efi_guid_t efi_guid_firmware_management_protocol;
>   extern const efi_guid_t efi_esrt_guid;
>   /* GUID of the SMBIOS table */
>   extern const efi_guid_t smbios_guid;
> +/*GUID of console */
> +extern const efi_guid_t efi_guid_text_input_protocol;
>
>   extern char __efi_runtime_start[], __efi_runtime_stop[];
>   extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
> @@ -1064,4 +1077,28 @@ efi_status_t efi_esrt_populate(void);
>   efi_status_t efi_load_capsule_drivers(void);
>
>   efi_status_t platform_get_eventlog(struct udevice *dev, u64 *addr, u32 *sz);
> +
> +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> +					  const efi_guid_t *protocol, void *search_key,
> +					  efi_uintn_t *no_handles, efi_handle_t **buffer);
> +
> +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> +				 struct efi_file_handle **root);
> +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> +			       struct efi_file_handle **new_handle,
> +			       u16 *file_name, u64 open_mode,
> +			       u64 attributes);
> +efi_status_t efi_file_close_int(struct efi_file_handle *file);
> +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> +			       efi_uintn_t *buffer_size, void *buffer);
> +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos);
> +
> +typedef efi_status_t (*efi_console_filter_func)(struct efi_input_key *key);
> +efi_status_t efi_console_get_u16_string
> +		(struct efi_simple_text_input_protocol *cin,
> +		 u16 *buf, efi_uintn_t count, efi_console_filter_func filer_func,
> +		 int row, int col);
> +
> +efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size);
> +
>   #endif /* _EFI_LOADER_H */
> diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
> index 234073ecb7..ede9116b3c 100644
> --- a/lib/efi_loader/efi_bootmgr.c
> +++ b/lib/efi_loader/efi_bootmgr.c
> @@ -19,6 +19,9 @@
>   static const struct efi_boot_services *bs;
>   static const struct efi_runtime_services *rs;
>
> +const efi_guid_t efi_guid_bootmenu_auto_generated =
> +		EFICONFIG_AUTO_GENERATED_ENTRY_GUID;
> +
>   /*
>    * bootmgr implements the logic of trying to find a payload to boot
>    * based on the BootOrder + BootXXXX variables, and then loading it.
> diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> index 4da64b5d29..1233418e77 100644
> --- a/lib/efi_loader/efi_boottime.c
> +++ b/lib/efi_loader/efi_boottime.c
> @@ -2453,6 +2453,35 @@ static efi_status_t EFIAPI efi_protocols_per_handle(
>   	return EFI_EXIT(EFI_SUCCESS);
>   }
>
> +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> +					  const efi_guid_t *protocol, void *search_key,
> +					  efi_uintn_t *no_handles, efi_handle_t **buffer)
> +{
> +	efi_status_t r;
> +	efi_uintn_t buffer_size = 0;
> +
> +	if (!no_handles || !buffer) {
> +		r = EFI_INVALID_PARAMETER;
> +		goto out;
> +	}
> +	*no_handles = 0;
> +	*buffer = NULL;
> +	r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> +			      *buffer);
> +	if (r != EFI_BUFFER_TOO_SMALL)
> +		goto out;
> +	r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> +			      (void **)buffer);
> +	if (r != EFI_SUCCESS)
> +		goto out;
> +	r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> +			      *buffer);
> +	if (r == EFI_SUCCESS)
> +		*no_handles = buffer_size / sizeof(efi_handle_t);
> +out:
> +	return r;
> +}
> +
>   /**
>    * efi_locate_handle_buffer() - locate handles implementing a protocol
>    * @search_type: selection criterion
> @@ -2474,30 +2503,13 @@ efi_status_t EFIAPI efi_locate_handle_buffer(
>   			efi_uintn_t *no_handles, efi_handle_t **buffer)
>   {
>   	efi_status_t r;
> -	efi_uintn_t buffer_size = 0;
>
>   	EFI_ENTRY("%d, %pUs, %p, %p, %p", search_type, protocol, search_key,
>   		  no_handles, buffer);
>
> -	if (!no_handles || !buffer) {
> -		r = EFI_INVALID_PARAMETER;
> -		goto out;
> -	}
> -	*no_handles = 0;
> -	*buffer = NULL;
> -	r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> -			      *buffer);
> -	if (r != EFI_BUFFER_TOO_SMALL)
> -		goto out;
> -	r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> -			      (void **)buffer);
> -	if (r != EFI_SUCCESS)
> -		goto out;
> -	r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> -			      *buffer);
> -	if (r == EFI_SUCCESS)
> -		*no_handles = buffer_size / sizeof(efi_handle_t);
> -out:
> +	r = efi_locate_handle_buffer_int(search_type, protocol, search_key,
> +					 no_handles, buffer);
> +
>   	return EFI_EXIT(r);
>   }
>
> diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
> index 3164fd484e..5be509f0d6 100644
> --- a/lib/efi_loader/efi_console.c
> +++ b/lib/efi_loader/efi_console.c
> @@ -7,6 +7,7 @@
>
>   #define LOG_CATEGORY LOGC_EFI
>
> +#include <ansi.h>
>   #include <common.h>
>   #include <charset.h>
>   #include <malloc.h>
> @@ -1318,3 +1319,72 @@ out_of_memory:
>   	printf("ERROR: Out of memory\n");
>   	return r;
>   }
> +
> +/**
> + * efi_console_get_u16_string() - get user input string
> + *
> + * @cin:		protocol interface to EFI_SIMPLE_TEXT_INPUT_PROTOCOL
> + * @buf:		buffer to store user input string in UTF16
> + * @count:		number of u16 string including NULL terminator that buf has
> + * @filter_func:	callback to filter user input
> + * @row:		row number to locate user input form
> + * @col:		column number to locate user input form
> + * Return:		status code
> + */
> +efi_status_t efi_console_get_u16_string(struct efi_simple_text_input_protocol *cin,
> +					u16 *buf, efi_uintn_t count,
> +					efi_console_filter_func filter_func,
> +					int row, int col)
> +{
> +	efi_status_t ret;
> +	efi_uintn_t len = 0;
> +	struct efi_input_key key;
> +
> +	printf(ANSI_CURSOR_POSITION
> +	       ANSI_CLEAR_LINE_TO_END
> +	       ANSI_CURSOR_SHOW, row, col);
> +
> +	ret = EFI_CALL(cin->reset(cin, false));
> +	if (ret != EFI_SUCCESS)
> +		return ret;
> +
> +	for (;;) {
> +		do {
> +			ret = EFI_CALL(cin->read_key_stroke(cin, &key));
> +			mdelay(10);
> +		} while (ret == EFI_NOT_READY);
> +
> +		if (key.unicode_char == u'\b') {
> +			if (len > 0)
> +				buf[--len] = u'\0';
> +
> +			printf(ANSI_CURSOR_POSITION
> +			       "%ls"
> +			       ANSI_CLEAR_LINE_TO_END, row, col, buf);
> +			continue;
> +		} else if (key.unicode_char == u'\r') {
> +			buf[len] = u'\0';
> +			return EFI_SUCCESS;
> +		} else if (key.unicode_char == 0x3 || key.scan_code == 23) {
> +			return EFI_ABORTED;
> +		} else if (key.unicode_char < 0x20) {
> +			/* ignore control codes other than Ctrl+C, '\r' and '\b' */
> +			continue;
> +		} else if (key.scan_code != 0) {
> +			/* only accept single ESC press for cancel */
> +			continue;
> +		}
> +
> +		if (filter_func) {
> +			if (filter_func(&key) != EFI_SUCCESS)
> +				continue;
> +		}
> +
> +		if (len >= (count - 1))
> +			continue;
> +
> +		buf[len] = key.unicode_char;
> +		len++;
> +		printf(ANSI_CURSOR_POSITION "%ls", row, col, buf);
> +	}
> +}
> diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
> index f269abf135..a34ca46a11 100644
> --- a/lib/efi_loader/efi_disk.c
> +++ b/lib/efi_loader/efi_disk.c
> @@ -760,3 +760,53 @@ efi_status_t efi_disk_init(void)
>
>   	return EFI_SUCCESS;
>   }
> +
> +/**
> + * efi_disk_get_device_name() - get U-Boot device name associated with EFI handle
> + *
> + * @handle:	pointer to the EFI handle
> + * @buf:	pointer to the buffer to store the string
> + * @size:	size of buffer
> + * Return:	status code
> + */
> +efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size)
> +{
> +	int count;
> +	int diskid;
> +	enum uclass_id id;
> +	unsigned int part;
> +	struct udevice *dev;
> +	struct blk_desc *desc;
> +	const char *if_typename;
> +	bool is_partition = false;
> +	struct disk_part *part_data;
> +
> +	if (!handle || !buf || !size)
> +		return EFI_INVALID_PARAMETER;
> +
> +	dev = handle->dev;
> +	id = device_get_uclass_id(dev);
> +	if (id == UCLASS_BLK) {
> +		desc = dev_get_uclass_plat(dev);
> +	} else if (id == UCLASS_PARTITION) {
> +		desc = dev_get_uclass_plat(dev_get_parent(dev));
> +		is_partition = true;
> +	} else {
> +		return EFI_INVALID_PARAMETER;
> +	}
> +	if_typename = blk_get_if_type_name(desc->if_type);
> +	diskid = desc->devnum;
> +
> +	if (is_partition) {
> +		part_data = dev_get_uclass_plat(dev);
> +		part = part_data->partnum;
> +		count = snprintf(buf, size, "%s %d:%d", if_typename, diskid, part);
> +	} else {
> +		count = snprintf(buf, size, "%s %d", if_typename, diskid);
> +	}
> +
> +	if (count < 0 || (count + 1) > size)
> +		return EFI_INVALID_PARAMETER;
> +
> +	return EFI_SUCCESS;
> +}
> diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
> index 7a7077e6d0..c96a7f7ca3 100644
> --- a/lib/efi_loader/efi_file.c
> +++ b/lib/efi_loader/efi_file.c
> @@ -246,10 +246,10 @@ error:
>   	return NULL;
>   }
>
> -static efi_status_t efi_file_open_int(struct efi_file_handle *this,
> -				      struct efi_file_handle **new_handle,
> -				      u16 *file_name, u64 open_mode,
> -				      u64 attributes)
> +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> +			       struct efi_file_handle **new_handle,
> +			       u16 *file_name, u64 open_mode,
> +			       u64 attributes)
>   {
>   	struct file_handle *fh = to_fh(this);
>   	efi_status_t ret;
> @@ -369,11 +369,17 @@ static efi_status_t file_close(struct file_handle *fh)
>   	return EFI_SUCCESS;
>   }
>
> -static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> +efi_status_t efi_file_close_int(struct efi_file_handle *file)
>   {
>   	struct file_handle *fh = to_fh(file);
> +
> +	return file_close(fh);
> +}
> +
> +static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> +{
>   	EFI_ENTRY("%p", file);
> -	return EFI_EXIT(file_close(fh));
> +	return EFI_EXIT(efi_file_close_int(file));
>   }
>
>   static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
> @@ -562,8 +568,8 @@ static efi_status_t dir_read(struct file_handle *fh, u64 *buffer_size,
>   	return EFI_SUCCESS;
>   }
>
> -static efi_status_t efi_file_read_int(struct efi_file_handle *this,
> -				      efi_uintn_t *buffer_size, void *buffer)
> +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> +			       efi_uintn_t *buffer_size, void *buffer)
>   {
>   	struct file_handle *fh = to_fh(this);
>   	efi_status_t ret = EFI_SUCCESS;
> @@ -773,24 +779,11 @@ out:
>   	return EFI_EXIT(ret);
>   }
>
> -/**
> - * efi_file_setpos() - set current position in file
> - *
> - * This function implements the SetPosition service of the EFI file protocol.
> - * See the UEFI spec for details.
> - *
> - * @file:	file handle
> - * @pos:	new file position
> - * Return:	status code
> - */
> -static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> -					   u64 pos)
> +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos)
>   {
>   	struct file_handle *fh = to_fh(file);
>   	efi_status_t ret = EFI_SUCCESS;
>
> -	EFI_ENTRY("%p, %llu", file, pos);
> -
>   	if (fh->isdir) {
>   		if (pos != 0) {
>   			ret = EFI_UNSUPPORTED;
> @@ -812,6 +805,28 @@ static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
>   	fh->offset = pos;
>
>   error:
> +	return ret;
> +}
> +
> +/**
> + * efi_file_setpos() - set current position in file
> + *
> + * This function implements the SetPosition service of the EFI file protocol.
> + * See the UEFI spec for details.
> + *
> + * @file:	file handle
> + * @pos:	new file position
> + * Return:	status code
> + */
> +static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> +					   u64 pos)
> +{
> +	efi_status_t ret = EFI_SUCCESS;
> +
> +	EFI_ENTRY("%p, %llu", file, pos);
> +
> +	ret = efi_file_setpos_int(file, pos);
> +
>   	return EFI_EXIT(ret);
>   }
>
> @@ -1138,17 +1153,23 @@ struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp)
>   	return f;
>   }
>
> +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> +				 struct efi_file_handle **root)
> +{
> +	struct file_system *fs = to_fs(this);
> +
> +	*root = file_open(fs, NULL, NULL, 0, 0);
> +
> +	return EFI_SUCCESS;
> +}
> +
>   static efi_status_t EFIAPI
>   efi_open_volume(struct efi_simple_file_system_protocol *this,
>   		struct efi_file_handle **root)
>   {
> -	struct file_system *fs = to_fs(this);
> -
>   	EFI_ENTRY("%p, %p", this, root);
>
> -	*root = file_open(fs, NULL, NULL, 0, 0);
> -
> -	return EFI_EXIT(EFI_SUCCESS);
> +	return EFI_EXIT(efi_open_volume_int(this, root));
>   }
>
>   struct efi_simple_file_system_protocol *

Hi Heinrich,

On Sun, 4 Sept 2022 at 18:05, Heinrich Schuchardt <xypron.glpk@gmx.de> wrote:
>
> On 9/2/22 16:23, Masahisa Kojima wrote:
> > This commit add the "eficonfig" command.
> > The "eficonfig" command implements the menu-driven UEFI boot option
> > maintenance feature. This commit implements the addition of
> > new boot option. User can select the block device volume having
> > efi_simple_file_system_protocol and select the file corresponding
> > to the Boot#### variable. User can also enter the description and
> > optional_data of the BOOT#### variable in utf8.
> >
> > This commit adds "include/efi_config.h", it contains the common
> > definition to be used from other menus such as UEFI Secure Boot
> > key management.
> >
> > Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
> > ---
> > Changes in v15:
> > - moves the free(entry->data) outside the eficonfig_destroy() function and
> >    entry->data is freed explicitly only when needed
> > - expose eficonfig_destroy() for succeeding secure boot key management patch
> >
> > Changes in v14:
> > - fix the missing initialization
> > - add comment for key handling
> >
> > No change in v13:
> >
> > Changes in v12:
> > - add select/clear menu before displaying volume selectio
> > - move function declaration from efi_loader.h to efi_config.h
> > - remove unused declaration
> > - support the boot option does not have file path
> > - correctly handle if optional_data is empty
> >
> > Changes in v11:
> > - refactor menu entry construction, directly use eficonfig_entry structure
> > - remove reading directory info to calculate the number of entry
> > - fix invalid efi_free_pool() in ill_file_info()
> > - use ANSI_CURSOR_POSITION and ANSI_CLEAR_LINE instead of printf("\n")
> >    since current eficonfig implementation does not handle console size correctly.
> >    printf("\n") at the outside of console size breaks the console output.
> >
> > Changes in v10:
> > - add initrd file selection
> > - do refactoring
> > - eficonfig_process_common() use list structure
> > - remove u'/' before copying file_path into current_path
> > - fix typos
> > - check snprintf error
> >
> > Changes in v9:
> > - move "efi_guid_bootmenu_auto_generated definition" into efi_bootmgr.c
> >    to address build error when CMD_EFICONFIG is disabled
> > - fix typos and comment
> > - remove file system information from error message
> > - remove unreachable code in eficonfig_choice_entry()
> > - single printf() call as much as possible
> > - call only getchar() in  eficonfig_print_msg()
> > - filter out '.' entry from file selection
> > - update the efi_disk_get_device_name() implementation
> > - add function comment
> >
> > Changes in v8:
> > - command name is change from "efimenu" to "eficonfig"
> > - function and struct prefixes is changed to "eficonfig"
> > - fix menu header string
> >
> > Changes in v7:
> > - add "efimenu" command and uefi variable maintenance code
> >    moved into cmd/efimenu.c
> > - create include/efimenu.h to define the common definition for
> >    the other menu such as UEFI Secure Boot key management
> > - update boot option edit UI, user can select description, file,
> >    and optional_data to edit in the same menu like following.
> >
> >    ** Edit Boot Option **
> >
> >       Description: debian
> >       File: virtio 0:1/EFI\debian\grubaa64.efi
> >       Optional Data: test
> >       Save
> >       Quit
> >
> > - remove exit parameter from efimenu_process_common()
> > - menu title type is changed from u16 to char
> > - efimenu_process_common() add menu title string
> > - reduce printf/puts function call for displaying the menu
> > - efi_console_get_u16_string() accept 0 length to allow
> >    optional_data is empty
> > - efi_console_get_u16_string() the "size" parameter name is changes to "count"
> > - efimenu is now designed to maintain the UEFI variables, remove autoboot related code
> > - remove one empty line before "Quit" entry
> > - efimenu_init() processes only the first time
> >
> > Changes in v6:
> > - fix typos
> > - modify volume name to match U-Boot syntax
> > - compile in CONFIG_EFI_LOADER=n and CONFIG_CMD_BOOTEFI_BOOTMGR=n
> > - simplify u16_strncmp() usage
> > - support "a\b.efi" file path, use link list to handle filepath
> > - modify length check condition
> > - UEFI related menu items only appears with CONFIG_AUTOBOOT_MENU_SHOW=y
> >
> > Changes in v5:
> > - remove forward declarations
> > - add const qualifier for menu items
> > - fix the possible unaligned access for directory info access
> > - split into three commit 1)add boot option 2) delete boot option 3)change boot order
> >    This commit is 1)add boot option.
> > - fix file name buffer allocation size, it should be EFI_BOOTMENU_FILE_PATH_MAX * sizeof(u16)
> > - fix wrong size checking for file selection
> >
> > Chanes in v4:
> > - UEFI boot option maintenance menu is integrated into bootmenu
> > - display the simplified volume name(e.g. usb0:1, nvme1:2) for the
> >    volume selection
> > - instead of extending lib/efi_loader/efi_bootmgr.c, newly create
> >    lib/efi_loader/efi_bootmenu_maintenance.c and implement boot
> >    variable maintenance into it.
> >
> > Changes in RFC v3:
> >   not included in v3 series
> >
> > Changes in RFC v2:
> > - enable utf8 user input for boot option name
> > - create lib/efi_loader/efi_console.c::efi_console_get_u16_string() for
> >    utf8 user input handling
> > - use u16_strlcat instead of u16_strcat
> > - remove the EFI_CALLs, and newly create or expose the following
> >    xxx_int() functions.
> >      efi_locate_handle_buffer_int(), efi_open_volume_int(),
> >      efi_file_open_int(), efi_file_close_int(), efi_file_read_int() and
> >      efi_file_setpos_int().
> >    Note that EFI_CALLs still exist for EFI_DEVICE_PATH_TO_TEXT_PROTOCOL
> >    and EFI_SIMPLE_TEXT_INPUT/OUTPUT_PROTOCOL
> > - use efi_search_protocol() instead of calling locate_protocol() to get
> >    the device_path_to_text_protocol interface.
> > - remove unnecessary puts(ANSI_CLEAR_LINE), this patch is still depends on
> >    puts(ANSI_CLEAR_CONSOLE)
> > - skip SetVariable() if the bootorder is not changed
> >
> >   cmd/Kconfig                   |    7 +
> >   cmd/Makefile                  |    1 +
> >   cmd/eficonfig.c               | 1568 +++++++++++++++++++++++++++++++++
> >   include/efi_config.h          |   96 ++
> >   include/efi_loader.h          |   37 +
> >   lib/efi_loader/efi_bootmgr.c  |    3 +
> >   lib/efi_loader/efi_boottime.c |   52 +-
> >   lib/efi_loader/efi_console.c  |   70 ++
> >   lib/efi_loader/efi_disk.c     |   50 ++
> >   lib/efi_loader/efi_file.c     |   75 +-
> >   10 files changed, 1912 insertions(+), 47 deletions(-)
> >   create mode 100644 cmd/eficonfig.c
> >   create mode 100644 include/efi_config.h
> >
> > diff --git a/cmd/Kconfig b/cmd/Kconfig
> > index 211ebe9c87..a1e8613c56 100644
> > --- a/cmd/Kconfig
> > +++ b/cmd/Kconfig
> > @@ -1928,6 +1928,13 @@ config CMD_EFIDEBUG
> >         particularly for managing boot parameters as  well as examining
> >         various EFI status for debugging.
> >
> > +config CMD_EFICONFIG
> > +     bool "eficonfig - provide menu-driven uefi variables maintenance interface"
> > +     depends on CMD_BOOTEFI_BOOTMGR
> > +     help
> > +       Enable the 'eficonfig' command which provides the menu-driven UEFI
> > +       variable maintenance interface.
> > +
> >   config CMD_EXCEPTION
> >       bool "exception - raise exception"
> >       depends on ARM || RISCV || SANDBOX || X86
> > diff --git a/cmd/Makefile b/cmd/Makefile
> > index 6e87522b62..18f5cb890d 100644
> > --- a/cmd/Makefile
> > +++ b/cmd/Makefile
> > @@ -63,6 +63,7 @@ obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
> >   obj-$(CONFIG_CMD_EEPROM) += eeprom.o
> >   obj-$(CONFIG_EFI) += efi.o
> >   obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
> > +obj-$(CONFIG_CMD_EFICONFIG) += eficonfig.o
> >   obj-$(CONFIG_CMD_ELF) += elf.o
> >   obj-$(CONFIG_CMD_EROFS) += erofs.o
> >   obj-$(CONFIG_HUSH_PARSER) += exit.o
> > diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> > new file mode 100644
> > index 0000000000..30ce55d055
> > --- /dev/null
> > +++ b/cmd/eficonfig.c
> > @@ -0,0 +1,1568 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + *  Menu-driven UEFI Variable maintenance
> > + *
> > + *  Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> > + */
> > +
> > +#include <ansi.h>
> > +#include <common.h>
> > +#include <charset.h>
> > +#include <efi_loader.h>
> > +#include <efi_load_initrd.h>
> > +#include <efi_config.h>
> > +#include <efi_variable.h>
> > +#include <log.h>
> > +#include <malloc.h>
> > +#include <menu.h>
> > +#include <watchdog.h>
> > +#include <asm/unaligned.h>
> > +#include <linux/delay.h>
> > +
> > +static struct efi_simple_text_input_protocol *cin;
> > +
> > +#define EFICONFIG_DESCRIPTION_MAX 32
> > +#define EFICONFIG_OPTIONAL_DATA_MAX 64
> > +
> > +/**
> > + * struct eficonfig_filepath_info - structure to be used to store file path
> > + *
> > + * @name:    file or directory name
> > + * @list:    list structure
> > + */
> > +struct eficonfig_filepath_info {
> > +     u16 *name;
> > +     struct list_head list;
> > +};
> > +
> > +/**
> > + * struct eficonfig_boot_option - structure to be used for updating UEFI boot option
> > + *
> > + * @file_info:               user selected file info
> > + * @initrd_info:     user selected initrd file info
> > + * @boot_index:              index of the boot option
> > + * @description:     pointer to the description string
> > + * @optional_data:   pointer to the optional_data
> > + * @edit_completed:  flag indicates edit complete
> > + */
> > +struct eficonfig_boot_option {
> > +     struct eficonfig_select_file_info file_info;
> > +     struct eficonfig_select_file_info initrd_info;
> > +     unsigned int boot_index;
> > +     u16 *description;
> > +     u16 *optional_data;
> > +     bool edit_completed;
> > +};
> > +
> > +/**
> > + * struct eficonfig_volume_entry_data - structure to be used to store volume info
> > + *`
> > + * @file_info:       pointer to file info structure
> > + * @v:               pointer to the protocol interface
> > + * @dp:              pointer to the device path
> > + */
> > +struct eficonfig_volume_entry_data {
> > +     struct eficonfig_select_file_info *file_info;
> > +     struct efi_simple_file_system_protocol *v;
> > +     struct efi_device_path *dp;
> > +};
> > +
> > +/**
> > + * struct eficonfig_file_entry_data - structure to be used to store file info
> > + *
> > + * @file_info:               pointer to file info structure
> > + * @is_directory:    flag to identify the directory or file
> > + * @file_name:               name of directory or file
> > + */
> > +struct eficonfig_file_entry_data {
> > +     struct eficonfig_select_file_info *file_info;
> > +     bool is_directory;
> > +     u16 *file_name;
> > +};
> > +
> > +/**
> > + * eficonfig_print_msg() - print message
> > + *
> > + * display the message to the user, user proceeds the screen
> > + * with any key press.
> > + *
> > + * @items:           pointer to the structure of each menu entry
> > + * @count:           the number of menu entry
> > + * @menu_header:     pointer to the menu header string
> > + * Return:   status code
> > + */
> > +void eficonfig_print_msg(char *msg)
> > +{
> > +     /* Flush input */
> > +     while (tstc())
> > +             getchar();
> > +
> > +     printf(ANSI_CURSOR_HIDE
> > +            ANSI_CLEAR_CONSOLE
> > +            ANSI_CURSOR_POSITION
> > +            "%s\n\n  Press any key to continue", 3, 4, msg);
> > +
> > +     getchar();
> > +}
> > +
> > +/**
> > + * eficonfig_print_entry() - print each menu entry
> > + *
> > + * @data:    pointer to the data associated with each menu entry
> > + */
> > +static void eficonfig_print_entry(void *data)
> > +{
> > +     struct eficonfig_entry *entry = data;
> > +     int reverse = (entry->efi_menu->active == entry->num);
> > +
> > +     /* TODO: support scroll or page for many entries */
> > +
> > +     /*
> > +      * Move cursor to line where the entry will be drawn (entry->num)
> > +      * First 3 lines(menu header) + 1 empty line
> > +      */
> > +     printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> > +
> > +     if (reverse)
> > +             puts(ANSI_COLOR_REVERSE);
> > +
> > +     printf("%s", entry->title);
> > +
> > +     if (reverse)
> > +             puts(ANSI_COLOR_RESET);
> > +}
> > +
> > +/**
> > + * eficonfig_display_statusline() - print status line
> > + *
> > + * @m:       pointer to the menu structure
> > + */
> > +static void eficonfig_display_statusline(struct menu *m)
> > +{
> > +     struct eficonfig_entry *entry;
> > +
> > +     if (menu_default_choice(m, (void *)&entry) < 0)
> > +             return;
> > +
> > +     printf(ANSI_CURSOR_POSITION
> > +           "\n%s\n"
> > +            ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
> > +            "  Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit"
> > +            ANSI_CLEAR_LINE_TO_END ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
> > +            1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
> > +            entry->efi_menu->count + 6, 1, entry->efi_menu->count + 7, 1);
> > +}
> > +
> > +/**
> > + * eficonfig_choice_entry() - user key input handler
> > + *
> > + * @data:    pointer to the efimenu structure
> > + * Return:   key string to identify the selected entry
> > + */
> > +static char *eficonfig_choice_entry(void *data)
> > +{
> > +     int esc = 0;
> > +     struct list_head *pos, *n;
> > +     struct eficonfig_entry *entry;
> > +     enum bootmenu_key key = KEY_NONE;
> > +     struct efimenu *efi_menu = data;
> > +
> > +     while (1) {
> > +             bootmenu_loop((struct bootmenu_data *)efi_menu, &key, &esc);
> > +
> > +             switch (key) {
> > +             case KEY_UP:
> > +                     if (efi_menu->active > 0)
> > +                             --efi_menu->active;
> > +                     /* no menu key selected, regenerate menu */
> > +                     return NULL;
> > +             case KEY_DOWN:
> > +                     if (efi_menu->active < efi_menu->count - 1)
> > +                             ++efi_menu->active;
> > +                     /* no menu key selected, regenerate menu */
> > +                     return NULL;
> > +             case KEY_SELECT:
> > +                     list_for_each_safe(pos, n, &efi_menu->list) {
> > +                             entry = list_entry(pos, struct eficonfig_entry, list);
> > +                             if (entry->num == efi_menu->active)
> > +                                     return entry->key;
> > +                     }
> > +                     break;
> > +             case KEY_QUIT:
> > +                     /* Quit by choosing the last entry */
> > +                     entry = list_last_entry(&efi_menu->list, struct eficonfig_entry, list);
> > +                     return entry->key;
> > +             default:
> > +                     /* Pressed key is not valid, no need to regenerate the menu */
> > +                     break;
> > +             }
> > +     }
> > +}
> > +
> > +/**
> > + * eficonfig_destroy() - destroy efimenu
> > + *
> > + * @efi_menu:        pointer to the efimenu structure
> > + */
> > +void eficonfig_destroy(struct efimenu *efi_menu)
> > +{
> > +     struct list_head *pos, *n;
> > +     struct eficonfig_entry *entry;
> > +
> > +     list_for_each_safe(pos, n, &efi_menu->list) {
> > +             entry = list_entry(pos, struct eficonfig_entry, list);
> > +             free(entry->title);
> > +             list_del(&entry->list);
> > +             free(entry);
> > +     }
> > +     free(efi_menu->menu_header);
> > +     free(efi_menu);
> > +}
> > +
> > +/**
> > + * eficonfig_process_quit() - callback function for "Quit" entry
> > + *
> > + * @data:    pointer to the data
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_process_quit(void *data)
> > +{
> > +     return EFI_ABORTED;
> > +}
> > +
> > +/**
> > + * append_entry() - append menu item
> > + *
> > + * @efi_menu:        pointer to the efimenu structure
> > + * @title:   pointer to the entry title
> > + * @func:    callback of each entry
> > + * @data:    pointer to the data to be passed to each entry callback
> > + * Return:   status code
> > + */
> > +static efi_status_t append_entry(struct efimenu *efi_menu,
> > +                              char *title, eficonfig_entry_func func, void *data)
> > +{
> > +     struct eficonfig_entry *entry;
> > +
> > +     if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     entry = calloc(1, sizeof(struct eficonfig_entry));
> > +     if (!entry)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     entry->title = title;
> > +     sprintf(entry->key, "%d", efi_menu->count);
> > +     entry->efi_menu = efi_menu;
> > +     entry->func = func;
> > +     entry->data = data;
> > +     entry->num = efi_menu->count++;
> > +     list_add_tail(&entry->list, &efi_menu->list);
> > +
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * append_quit_entry() - append quit entry
> > + *
> > + * @efi_menu:        pointer to the efimenu structure
> > + * Return:   status code
> > + */
> > +static efi_status_t append_quit_entry(struct efimenu *efi_menu)
> > +{
> > +     char *title;
> > +     efi_status_t ret;
> > +
> > +     title = strdup("Quit");
> > +     if (!title)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     ret = append_entry(efi_menu, title, eficonfig_process_quit, NULL);
> > +     if (ret != EFI_SUCCESS)
> > +             free(title);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_create_fixed_menu() - create fixed entry menu structure
> > + *
> > + * @items:   pointer to the menu entry item
> > + * @count:   the number of menu entry
> > + * Return:   pointer to the efimenu structure
> > + */
> > +void *eficonfig_create_fixed_menu(const struct eficonfig_item *items, int count)
> > +{
> > +     u32 i;
> > +     char *title;
> > +     efi_status_t ret;
> > +     struct efimenu *efi_menu;
> > +     const struct eficonfig_item *iter = items;
> > +
> > +     efi_menu = calloc(1, sizeof(struct efimenu));
> > +     if (!efi_menu)
> > +             return NULL;
> > +
> > +     INIT_LIST_HEAD(&efi_menu->list);
> > +     for (i = 0; i < count; i++, iter++) {
> > +             title = strdup(iter->title);
> > +             if (!title)
> > +                     goto out;
> > +
> > +             ret = append_entry(efi_menu, title, iter->func, iter->data);
> > +             if (ret != EFI_SUCCESS) {
> > +                     free(title);
> > +                     goto out;
> > +             }
> > +     }
> > +
> > +     return efi_menu;
> > +out:
> > +     eficonfig_destroy(efi_menu);
> > +
> > +     return NULL;
> > +}
> > +
> > +/**
> > + * eficonfig_process_common() - main handler for UEFI menu
> > + *
> > + * Construct the structures required to show the menu, then handle
> > + * the user input interacting with u-boot menu functions.
> > + *
> > + * @efi_menu:                pointer to the efimenu structure
> > + * @menu_header:     pointer to the menu header string
> > + * Return:           status code
> > + */
> > +efi_status_t eficonfig_process_common(struct efimenu *efi_menu, char *menu_header)
> > +{
> > +     struct menu *menu;
> > +     void *choice = NULL;
> > +     struct list_head *pos, *n;
> > +     struct eficonfig_entry *entry;
> > +     efi_status_t ret = EFI_SUCCESS;
> > +
> > +     if (efi_menu->count > EFICONFIG_ENTRY_NUM_MAX)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     efi_menu->delay = -1;
> > +     efi_menu->active = 0;
> > +
> > +     if (menu_header) {
> > +             efi_menu->menu_header = strdup(menu_header);
>
> This does not build:

I will fix the issue.

Thanks,
Masahisa Kojima


>
> +cmd/eficonfig.c:380:7: error: variable 'menu' is used uninitialized
> whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
> +                if (!efi_menu->menu_header) {
> +                    ^~~~~~~~~~~~~~~~~~~~~~
> +cmd/eficonfig.c:416:15: note: uninitialized use occurs here
> +        menu_destroy(menu);
> +                     ^~~~
> +cmd/eficonfig.c:380:3: note: remove the 'if' if its condition is always
> false
> +                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +cmd/eficonfig.c:366:19: note: initialize the variable 'menu' to silence
> this warning
> +        struct menu *menu;
> +                         ^
> +                          = NULL
>
> Best regards
>
> Heinrich
>
> > +             if (!efi_menu->menu_header) {
> > +                     ret = EFI_OUT_OF_RESOURCES;
> > +                     goto out;
> > +             }
> > +     }
> > +
> > +     menu = menu_create(NULL, 0, 1, eficonfig_display_statusline,
> > +                        eficonfig_print_entry, eficonfig_choice_entry,
> > +                        efi_menu);
> > +     if (!menu) {
> > +             ret = EFI_INVALID_PARAMETER;
> > +             goto out;
> > +     }
> > +
> > +     list_for_each_safe(pos, n, &efi_menu->list) {
> > +             entry = list_entry(pos, struct eficonfig_entry, list);
> > +             if (!menu_item_add(menu, entry->key, entry)) {
> > +                     ret = EFI_INVALID_PARAMETER;
> > +                     goto out;
> > +             }
> > +     }
> > +
> > +     entry = list_first_entry_or_null(&efi_menu->list, struct eficonfig_entry, list);
> > +     if (entry)
> > +             menu_default_set(menu, entry->key);
> > +
> > +     printf(ANSI_CURSOR_HIDE
> > +            ANSI_CLEAR_CONSOLE
> > +            ANSI_CURSOR_POSITION, 1, 1);
> > +
> > +     if (menu_get_choice(menu, &choice)) {
> > +             entry = choice;
> > +             if (entry->func)
> > +                     ret = entry->func(entry->data);
> > +     }
> > +out:
> > +     menu_destroy(menu);
> > +
> > +     printf(ANSI_CLEAR_CONSOLE
> > +            ANSI_CURSOR_POSITION
> > +            ANSI_CURSOR_SHOW, 1, 1);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_volume_selected() - handler of volume selection
> > + *
> > + * @data:    pointer to the data of selected entry
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_volume_selected(void *data)
> > +{
> > +     struct eficonfig_volume_entry_data *info = data;
> > +
> > +     if (info) {
> > +             info->file_info->current_volume = info->v;
> > +             info->file_info->dp_volume = info->dp;
> > +     }
> > +
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * create_selected_device_path() - create device path
> > + *
> > + * @file_info:       pointer to the selected file information
> > + * Return:
> > + * device path or NULL. Caller must free the returned value
> > + */
> > +static
> > +struct efi_device_path *create_selected_device_path(struct eficonfig_select_file_info *file_info)
> > +{
> > +     char *p;
> > +     void *buf;
> > +     efi_uintn_t fp_size;
> > +     struct efi_device_path *dp;
> > +     struct efi_device_path_file_path *fp;
> > +
> > +     fp_size = sizeof(struct efi_device_path) +
> > +               ((u16_strlen(file_info->current_path) + 1) * sizeof(u16));
> > +     buf = calloc(1, fp_size + sizeof(END));
> > +     if (!buf)
> > +             return NULL;
> > +
> > +     fp = buf;
> > +     fp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE,
> > +     fp->dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH,
> > +     fp->dp.length = (u16)fp_size;
> > +     u16_strcpy(fp->str, file_info->current_path);
> > +
> > +     p = buf;
> > +     p += fp_size;
> > +     *((struct efi_device_path *)p) = END;
> > +
> > +     dp = efi_dp_append(file_info->dp_volume, (struct efi_device_path *)buf);
> > +     free(buf);
> > +
> > +     return dp;
> > +}
> > +
> > +/**
> > + * eficonfig_file_selected() - handler of file selection
> > + *
> > + * @data:    pointer to the data of selected entry
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_file_selected(void *data)
> > +{
> > +     struct eficonfig_file_entry_data *info = data;
> > +
> > +     if (!info)
> > +             return EFI_INVALID_PARAMETER;
> > +
> > +     if (u16_strcmp(info->file_name, u".") == 0 &&
> > +         u16_strlen(info->file_name) == 1) {
> > +             /* stay current path */
> > +     } else if (u16_strcmp(info->file_name, u"..") == 0 &&
> > +                u16_strlen(info->file_name) == 2) {
> > +             struct eficonfig_filepath_info *iter;
> > +             struct list_head *pos, *n;
> > +             int is_last;
> > +
> > +             memset(info->file_info->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +             list_for_each_safe(pos, n, &info->file_info->filepath_list) {
> > +                     iter = list_entry(pos, struct eficonfig_filepath_info, list);
> > +
> > +                     is_last = list_is_last(&iter->list, &info->file_info->filepath_list);
> > +                     if (is_last) {
> > +                             list_del(&iter->list);
> > +                             free(iter->name);
> > +                             free(iter);
> > +                             break;
> > +                     }
> > +                     u16_strlcat(info->file_info->current_path, iter->name,
> > +                                 EFICONFIG_FILE_PATH_MAX);
> > +                     u16_strlcat(info->file_info->current_path, u"\\",
> > +                                 EFICONFIG_FILE_PATH_MAX);
> > +             }
> > +     } else {
> > +             size_t new_len;
> > +             struct eficonfig_filepath_info *filepath;
> > +
> > +             new_len = u16_strlen(info->file_info->current_path) +
> > +                                  u16_strlen(info->file_name);
> > +             if (new_len >= EFICONFIG_FILE_PATH_MAX) {
> > +                     eficonfig_print_msg("File path is too long!");
> > +                     return EFI_INVALID_PARAMETER;
> > +             }
> > +             u16_strlcat(info->file_info->current_path, info->file_name,
> > +                         EFICONFIG_FILE_PATH_MAX);
> > +
> > +             filepath = calloc(1, sizeof(struct eficonfig_filepath_info));
> > +             if (!filepath)
> > +                     return EFI_OUT_OF_RESOURCES;
> > +
> > +             filepath->name = u16_strdup(info->file_name);
> > +             if (!filepath->name) {
> > +                     free(filepath);
> > +                     return EFI_OUT_OF_RESOURCES;
> > +             }
> > +             list_add_tail(&filepath->list, &info->file_info->filepath_list);
> > +
> > +             if (info->is_directory) {
> > +                     /*
> > +                      * Remaining buffer should have enough space to contain u"\\" and
> > +                      * at least one character for file name
> > +                      */
> > +                     if (new_len + 2 >= EFICONFIG_FILE_PATH_MAX) {
> > +                             eficonfig_print_msg("Directory path is too long!");
> > +                             return EFI_INVALID_PARAMETER;
> > +                     }
> > +                     u16_strlcat(info->file_info->current_path, u"\\",
> > +                                 EFICONFIG_FILE_PATH_MAX);
> > +             } else {
> > +                     info->file_info->file_selected = true;
> > +             }
> > +     }
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * eficonfig_select_volume() - construct the volume selection menu
> > + *
> > + * @file_info:       pointer to the file selection structure
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_select_volume(struct eficonfig_select_file_info *file_info)
> > +{
> > +     u32 i;
> > +     efi_status_t ret;
> > +     efi_uintn_t count;
> > +     struct efimenu *efi_menu;
> > +     struct list_head *pos, *n;
> > +     struct efi_handler *handler;
> > +     struct eficonfig_entry *entry;
> > +     struct efi_device_path *device_path;
> > +     efi_handle_t *volume_handles = NULL;
> > +     struct efi_simple_file_system_protocol *v;
> > +
> > +     ret = efi_locate_handle_buffer_int(BY_PROTOCOL, &efi_simple_file_system_protocol_guid,
> > +                                        NULL, &count, (efi_handle_t **)&volume_handles);
> > +     if (ret != EFI_SUCCESS) {
> > +             eficonfig_print_msg("No block device found!");
> > +             return ret;
> > +     }
> > +
> > +     efi_menu = calloc(1, sizeof(struct efimenu));
> > +     if (!efi_menu)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     INIT_LIST_HEAD(&efi_menu->list);
> > +     for (i = 0; i < count; i++) {
> > +             char *devname;
> > +             struct efi_block_io *block_io;
> > +             struct eficonfig_volume_entry_data *info;
> > +
> > +             if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX - 1)
> > +                     break;
> > +
> > +             ret = efi_search_protocol(volume_handles[i],
> > +                                       &efi_simple_file_system_protocol_guid, &handler);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +             ret = efi_protocol_open(handler, (void **)&v, efi_root, NULL,
> > +                                     EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +
> > +             ret = efi_search_protocol(volume_handles[i], &efi_guid_device_path, &handler);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +             ret = efi_protocol_open(handler, (void **)&device_path,
> > +                                     efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +
> > +             ret = efi_search_protocol(volume_handles[i], &efi_block_io_guid, &handler);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +             ret = efi_protocol_open(handler, (void **)&block_io,
> > +                                     efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > +             if (ret != EFI_SUCCESS)
> > +                     continue;
> > +
> > +             info = calloc(1, sizeof(struct eficonfig_volume_entry_data));
> > +             if (!info) {
> > +                     ret = EFI_OUT_OF_RESOURCES;
> > +                     goto out;
> > +             }
> > +
> > +             devname = calloc(1, BOOTMENU_DEVICE_NAME_MAX);
> > +             if (!devname) {
> > +                     free(info);
> > +                     ret = EFI_OUT_OF_RESOURCES;
> > +                     goto out;
> > +             }
> > +             ret = efi_disk_get_device_name(volume_handles[i], devname,
> > +                                            BOOTMENU_DEVICE_NAME_MAX);
> > +             if (ret != EFI_SUCCESS) {
> > +                     free(info);
> > +                     goto out;
> > +             }
> > +
> > +             info->v = v;
> > +             info->dp = device_path;
> > +             info->file_info = file_info;
> > +             ret = append_entry(efi_menu, devname, eficonfig_volume_selected, info);
> > +             if (ret != EFI_SUCCESS) {
> > +                     free(info);
> > +                     goto out;
> > +             }
> > +     }
> > +
> > +     ret = append_quit_entry(efi_menu);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = eficonfig_process_common(efi_menu, "  ** Select Volume **");
> > +out:
> > +     efi_free_pool(volume_handles);
> > +     list_for_each_safe(pos, n, &efi_menu->list) {
> > +             entry = list_entry(pos, struct eficonfig_entry, list);
> > +             free(entry->data);
> > +     }
> > +     eficonfig_destroy(efi_menu);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_select_file() - construct the file selection menu
> > + *
> > + * @file_info:       pointer to the file selection structure
> > + * @root:    pointer to the file handle
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_select_file(struct eficonfig_select_file_info *file_info,
> > +                                       struct efi_file_handle *root)
> > +{
> > +     efi_uintn_t len;
> > +     efi_status_t ret;
> > +     struct efimenu *efi_menu;
> > +     struct efi_file_handle *f;
> > +     struct efi_file_info *buf;
> > +     struct list_head *pos, *n;
> > +
> > +     buf = calloc(1, sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE);
> > +     if (!buf)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     while (!file_info->file_selected) {
> > +             efi_menu = calloc(1, sizeof(struct efimenu));
> > +             if (!efi_menu) {
> > +                     ret = EFI_OUT_OF_RESOURCES;
> > +                     goto out;
> > +             }
> > +             INIT_LIST_HEAD(&efi_menu->list);
> > +
> > +             ret = efi_file_open_int(root, &f, file_info->current_path, EFI_FILE_MODE_READ, 0);
> > +             if (ret != EFI_SUCCESS) {
> > +                     eficonfig_print_msg("Reading volume failed!");
> > +                     ret = EFI_ABORTED;
> > +                     goto out;
> > +             }
> > +
> > +             /* Read directory and construct menu structure */
> > +             for (;;) {
> > +                     char *name, *p;
> > +                     int name_len;
> > +                     struct eficonfig_file_entry_data *info;
> > +
> > +                     if (efi_menu->count >= EFICONFIG_ENTRY_NUM_MAX - 1)
> > +                             break;
> > +
> > +                     len = sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE;
> > +                     ret = efi_file_read_int(f, &len, buf);
> > +                     if (ret != EFI_SUCCESS || len == 0)
> > +                             break;
> > +
> > +                     info = calloc(1, sizeof(struct eficonfig_file_entry_data));
> > +                     if (!info) {
> > +                             ret = EFI_OUT_OF_RESOURCES;
> > +                             goto err;
> > +                     }
> > +
> > +                     if (buf->attribute & EFI_FILE_DIRECTORY) {
> > +                             /* append u'/' at the end of directory name */
> > +                             name_len = utf16_utf8_strlen(buf->file_name) + 2;
> > +
> > +                             /* filter out u'.' */
> > +                             if (name_len == 3 && buf->file_name[0] == u'.') {
> > +                                     free(info);
> > +                                     continue;
> > +                             }
> > +
> > +                             name = calloc(1, name_len);
> > +                             if (!name) {
> > +                                     free(info);
> > +                                     ret = EFI_OUT_OF_RESOURCES;
> > +                                     goto err;
> > +                             }
> > +                             p = name;
> > +                             utf16_utf8_strcpy(&p, buf->file_name);
> > +                             name[u16_strlen(buf->file_name)] = u'/';
> > +
> > +                             info->is_directory = true;
> > +                     } else {
> > +                             name_len = utf16_utf8_strlen(buf->file_name) + 1;
> > +                             name = calloc(1, name_len);
> > +                             if (!name) {
> > +                                     free(info);
> > +                                     ret = EFI_OUT_OF_RESOURCES;
> > +                                     goto err;
> > +                             }
> > +                             p = name;
> > +                             utf16_utf8_strcpy(&p, buf->file_name);
> > +                     }
> > +
> > +                     info->file_name = u16_strdup(buf->file_name);
> > +                     if (!info->file_name) {
> > +                             free(info);
> > +                             free(name);
> > +                             ret = EFI_OUT_OF_RESOURCES;
> > +                             goto err;
> > +                     }
> > +
> > +                     info->file_info = file_info;
> > +                     ret = append_entry(efi_menu, name, eficonfig_file_selected, info);
> > +                     if (ret != EFI_SUCCESS) {
> > +                             free(info);
> > +                             free(name);
> > +                             goto err;
> > +                     }
> > +             }
> > +
> > +             ret = append_quit_entry(efi_menu);
> > +             if (ret != EFI_SUCCESS)
> > +                     goto err;
> > +
> > +             ret = eficonfig_process_common(efi_menu, "  ** Select File **");
> > +err:
> > +             efi_file_close_int(f);
> > +             list_for_each_safe(pos, n, &efi_menu->list) {
> > +                     struct eficonfig_entry *entry;
> > +
> > +                     entry = list_entry(pos, struct eficonfig_entry, list);
> > +                     /* skip "Quit" */
> > +                     if (list_is_last(&entry->list, &efi_menu->list))
> > +                             break;
> > +
> > +                     free(((struct eficonfig_file_entry_data *)(entry->data))->file_name);
> > +                     free(entry->data);
> > +             }
> > +             eficonfig_destroy(efi_menu);
> > +             if (ret != EFI_SUCCESS)
> > +                     break;
> > +     }
> > +
> > +out:
> > +     free(buf);
> > +     return ret;
> > +}
> > +
> > +/**
> > + * handle_user_input() - handle user input
> > + *
> > + * @buf:     pointer to the buffer
> > + * @buf_size:        size of the buffer
> > + * @cursor_col:      cursor column for user input
> > + * @msg:     pointer to the string to display
> > + * Return:   status code
> > + */
> > +static efi_status_t handle_user_input(u16 *buf, int buf_size,
> > +                                   int cursor_col, char *msg)
> > +{
> > +     u16 *tmp;
> > +     efi_status_t ret;
> > +
> > +     printf(ANSI_CLEAR_CONSOLE
> > +            ANSI_CURSOR_POSITION
> > +            "%s"
> > +            ANSI_CURSOR_POSITION
> > +            "  Press ENTER to complete, ESC/CTRL+C to quit",
> > +            0, 1, msg, 8, 1);
> > +
> > +     /* tmp is used to accept user cancel */
> > +     tmp = calloc(1, buf_size * sizeof(u16));
> > +     if (!tmp)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     ret = efi_console_get_u16_string(cin, tmp, buf_size, NULL, 4, cursor_col);
> > +     if (ret == EFI_SUCCESS)
> > +             u16_strcpy(buf, tmp);
> > +
> > +     free(tmp);
> > +
> > +     /* to stay the parent menu */
> > +     ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_boot_add_enter_description() - handle user input for description
> > + *
> > + * @data:    pointer to the internal boot option structure
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_boot_add_enter_description(void *data)
> > +{
> > +     struct eficonfig_boot_option *bo = data;
> > +
> > +     return handle_user_input(bo->description, EFICONFIG_DESCRIPTION_MAX, 22,
> > +                              "\n  ** Edit Description **\n"
> > +                              "\n"
> > +                              "  enter description: ");
> > +}
> > +
> > +/**
> > + * eficonfig_boot_add_optional_data() - handle user input for optional data
> > + *
> > + * @data:    pointer to the internal boot option structure
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_boot_add_optional_data(void *data)
> > +{
> > +     struct eficonfig_boot_option *bo = data;
> > +
> > +     return handle_user_input(bo->optional_data, EFICONFIG_OPTIONAL_DATA_MAX, 24,
> > +                              "\n  ** Edit Optional Data **\n"
> > +                              "\n"
> > +                              "  enter optional data:");
> > +}
> > +
> > +/**
> > + * eficonfig_boot_edit_save() - handler to save the boot option
> > + *
> > + * @data:    pointer to the internal boot option structure
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_boot_edit_save(void *data)
> > +{
> > +     struct eficonfig_boot_option *bo = data;
> > +
> > +     if (u16_strlen(bo->description) == 0) {
> > +             eficonfig_print_msg("Boot Description is empty!");
> > +             bo->edit_completed = false;
> > +             return EFI_NOT_READY;
> > +     }
> > +     if (u16_strlen(bo->file_info.current_path) == 0) {
> > +             eficonfig_print_msg("File is not selected!");
> > +             bo->edit_completed = false;
> > +             return EFI_NOT_READY;
> > +     }
> > +
> > +     bo->edit_completed = true;
> > +
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * eficonfig_process_select_file() - callback function for "Select File" entry
> > + *
> > + * @data:    pointer to the data
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_process_select_file(void *data)
> > +{
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * eficonfig_process_clear_file_selection() - callback function for "Clear" entry
> > + *
> > + * @data:    pointer to the data
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_process_clear_file_selection(void *data)
> > +{
> > +     struct eficonfig_select_file_info *file_info = data;
> > +
> > +     /* clear the existing file information */
> > +     file_info->current_volume = NULL;
> > +     file_info->current_path[0] = u'\0';
> > +     file_info->dp_volume = NULL;
> > +
> > +     return EFI_ABORTED;
> > +}
> > +
> > +static struct eficonfig_item select_file_menu_items[] = {
> > +     {"Select File", eficonfig_process_select_file},
> > +     {"Clear", eficonfig_process_clear_file_selection},
> > +     {"Quit", eficonfig_process_quit},
> > +};
> > +
> > +
> > +/**
> > + * eficonfig_display_select_file_option() - display select file option
> > + *
> > + * @file_info:       pointer to the file information structure
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_display_select_file_option(struct eficonfig_select_file_info *file_info)
> > +{
> > +     efi_status_t ret;
> > +     struct efimenu *efi_menu;
> > +
> > +     select_file_menu_items[1].data = file_info;
> > +     efi_menu = eficonfig_create_fixed_menu(select_file_menu_items,
> > +                                            ARRAY_SIZE(select_file_menu_items));
> > +     if (!efi_menu)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     ret = eficonfig_process_common(efi_menu, "  ** Update File **");
> > +     if (ret != EFI_SUCCESS) /* User selects "Clear" or "Quit" */
> > +             ret = EFI_NOT_READY;
> > +
> > +     eficonfig_destroy(efi_menu);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_select_file_handler() - handle user file selection
> > + *
> > + * @data:    pointer to the data
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_select_file_handler(void *data)
> > +{
> > +     size_t len;
> > +     efi_status_t ret;
> > +     struct list_head *pos, *n;
> > +     struct efi_file_handle *root;
> > +     struct eficonfig_filepath_info *item;
> > +     struct eficonfig_select_file_info *tmp = NULL;
> > +     struct eficonfig_select_file_info *file_info = data;
> > +
> > +     ret = eficonfig_display_select_file_option(file_info);
> > +     if (ret != EFI_SUCCESS)
> > +             return ret;
> > +
> > +     tmp = calloc(1, sizeof(struct eficonfig_select_file_info));
> > +     if (!tmp)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     tmp->current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +     if (!tmp->current_path) {
> > +             free(tmp);
> > +             return EFI_OUT_OF_RESOURCES;
> > +     }
> > +     INIT_LIST_HEAD(&tmp->filepath_list);
> > +
> > +     while (!tmp->file_selected) {
> > +             tmp->current_volume = NULL;
> > +             memset(tmp->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +
> > +             ret = eficonfig_select_volume(tmp);
> > +             if (ret != EFI_SUCCESS)
> > +                     goto out;
> > +
> > +             if (!tmp->current_volume)
> > +                     return EFI_INVALID_PARAMETER;
> > +
> > +             ret = efi_open_volume_int(tmp->current_volume, &root);
> > +             if (ret != EFI_SUCCESS)
> > +                     goto out;
> > +
> > +             ret = eficonfig_select_file(tmp, root);
> > +             if (ret == EFI_ABORTED)
> > +                     continue;
> > +             if (ret != EFI_SUCCESS)
> > +                     goto out;
> > +     }
> > +
> > +out:
> > +     if (ret == EFI_SUCCESS) {
> > +             len = u16_strlen(tmp->current_path);
> > +             len = (len >= EFICONFIG_FILE_PATH_MAX) ? (EFICONFIG_FILE_PATH_MAX - 1) : len;
> > +             memcpy(file_info->current_path, tmp->current_path, len * sizeof(u16));
> > +             file_info->current_path[len] = u'\0';
> > +             file_info->current_volume = tmp->current_volume;
> > +             file_info->dp_volume = tmp->dp_volume;
> > +     }
> > +
> > +     list_for_each_safe(pos, n, &tmp->filepath_list) {
> > +             item = list_entry(pos, struct eficonfig_filepath_info, list);
> > +             list_del(&item->list);
> > +             free(item->name);
> > +             free(item);
> > +     }
> > +     free(tmp->current_path);
> > +     free(tmp);
> > +
> > +     /* to stay the parent menu */
> > +     ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_get_unused_bootoption() - get unused "Boot####" index
> > + *
> > + * @buf:     pointer to the buffer to store boot option variable name
> > + * @buf_size:        buffer size
> > + * @index:   pointer to store the index in the BootOrder variable
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_get_unused_bootoption(u16 *buf, efi_uintn_t buf_size,
> > +                                          unsigned int *index)
> > +{
> > +     u32 i;
> > +     efi_status_t ret;
> > +     efi_uintn_t size;
> > +
> > +     if (buf_size < u16_strsize(u"Boot####"))
> > +             return EFI_BUFFER_TOO_SMALL;
> > +
> > +     for (i = 0; i <= 0xFFFF; i++) {
> > +             size = 0;
> > +             efi_create_indexed_name(buf, buf_size, "Boot", i);
> > +             ret = efi_get_variable_int(buf, &efi_global_variable_guid,
> > +                                        NULL, &size, NULL, NULL);
> > +             if (ret == EFI_BUFFER_TOO_SMALL)
> > +                     continue;
> > +             else
> > +                     break;
> > +     }
> > +
> > +     if (i > 0xFFFF)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     *index = i;
> > +
> > +     return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * eficonfig_set_boot_option() - set boot option
> > + *
> > + * @varname:         pointer to variable name
> > + * @dp:                      pointer to device path
> > + * @label:           pointer to label string
> > + * @optional_data:   pointer to optional data
> > + * Return:           status code
> > + */
> > +static efi_status_t eficonfig_set_boot_option(u16 *varname, struct efi_device_path *dp,
> > +                                           efi_uintn_t dp_size, u16 *label, char *optional_data)
> > +{
> > +     void *p = NULL;
> > +     efi_status_t ret;
> > +     efi_uintn_t size;
> > +     struct efi_load_option lo;
> > +
> > +     lo.file_path = dp;
> > +     lo.file_path_length = dp_size;
> > +     lo.attributes = LOAD_OPTION_ACTIVE;
> > +     lo.optional_data = optional_data;
> > +     lo.label = label;
> > +
> > +     size = efi_serialize_load_option(&lo, (u8 **)&p);
> > +     if (!size)
> > +             return EFI_INVALID_PARAMETER;
> > +
> > +     ret = efi_set_variable_int(varname, &efi_global_variable_guid,
> > +                                EFI_VARIABLE_NON_VOLATILE |
> > +                                EFI_VARIABLE_BOOTSERVICE_ACCESS |
> > +                                EFI_VARIABLE_RUNTIME_ACCESS,
> > +                                size, p, false);
> > +     free(p);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_append_bootorder() - append new boot option in BootOrder variable
> > + *
> > + * @index:   "Boot####" index to append to BootOrder variable
> > + * Return:   status code
> > + */
> > +efi_status_t eficonfig_append_bootorder(u16 index)
> > +{
> > +     u16 *bootorder;
> > +     efi_status_t ret;
> > +     u16 *new_bootorder = NULL;
> > +     efi_uintn_t last, size, new_size;
> > +
> > +     /* append new boot option */
> > +     bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
> > +     last = size / sizeof(u16);
> > +     new_size = size + sizeof(u16);
> > +     new_bootorder = calloc(1, new_size);
> > +     if (!new_bootorder) {
> > +             ret = EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +     memcpy(new_bootorder, bootorder, size);
> > +     new_bootorder[last] = index;
> > +
> > +     ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,
> > +                                EFI_VARIABLE_NON_VOLATILE |
> > +                                EFI_VARIABLE_BOOTSERVICE_ACCESS |
> > +                                EFI_VARIABLE_RUNTIME_ACCESS,
> > +                                new_size, new_bootorder, false);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +out:
> > +     free(bootorder);
> > +     free(new_bootorder);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * create_boot_option_entry() - create boot option entry
> > + *
> > + * @efi_menu:        pointer to the efimenu structure
> > + * @title:   pointer to the entry title
> > + * @val:     pointer to boot option label
> > + * @func:    callback of each entry
> > + * @data:    pointer to the data to be passed to each entry callback
> > + * Return:   status code
> > + */
> > +static efi_status_t create_boot_option_entry(struct efimenu *efi_menu, char *title, u16 *val,
> > +                                          eficonfig_entry_func func, void *data)
> > +{
> > +     u32 len;
> > +     char *p, *buf;
> > +
> > +     len = strlen(title) + 1;
> > +     if (val)
> > +             len += utf16_utf8_strlen(val);
> > +     buf = calloc(1, len);
> > +     if (!buf)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     strcpy(buf, title);
> > +     if (val) {
> > +             p = buf + strlen(title);
> > +             utf16_utf8_strcpy(&p, val);
> > +     }
> > +
> > +     return append_entry(efi_menu, buf, func, data);
> > +}
> > +
> > +/**
> > + * prepare_file_selection_entry() - prepare file selection entry
> > + *
> > + * @efi_menu:        pointer to the efimenu structure
> > + * @title:   pointer to the title string
> > + * @file_info:       pointer to the file info
> > + * Return:   status code
> > + */
> > +static efi_status_t prepare_file_selection_entry(struct efimenu *efi_menu, char *title,
> > +                                              struct eficonfig_select_file_info *file_info)
> > +{
> > +     u32 len;
> > +     efi_status_t ret;
> > +     u16 *file_name, *p;
> > +     efi_handle_t handle;
> > +     char devname[BOOTMENU_DEVICE_NAME_MAX] = {0};
> > +
> > +     /* get the device name only when the user already selected the file path */
> > +     handle = efi_dp_find_obj(file_info->dp_volume, NULL, NULL);
> > +     if (handle) {
> > +             ret = efi_disk_get_device_name(handle, devname, BOOTMENU_DEVICE_NAME_MAX);
> > +             if (ret != EFI_SUCCESS)
> > +                     return ret;
> > +     }
> > +
> > +     /* append u'/' to devname, it is just for display purpose. */
> > +     if (file_info->current_path[0] != u'\0' && file_info->current_path[0] != u'/')
> > +             strlcat(devname, "/", BOOTMENU_DEVICE_NAME_MAX);
> > +
> > +     len = strlen(devname);
> > +     len += utf16_utf8_strlen(file_info->current_path) + 1;
> > +     file_name = calloc(1, len * sizeof(u16));
> > +     if (!file_name)
> > +             return ret;
> > +
> > +     p = file_name;
> > +     utf8_utf16_strcpy(&p, devname);
> > +     u16_strlcat(file_name, file_info->current_path, len);
> > +     ret = create_boot_option_entry(efi_menu, title, file_name,
> > +                                    eficonfig_select_file_handler, file_info);
> > +     free(file_name);
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_show_boot_option() - prepare menu entry for editing boot option
> > + *
> > + * Construct the structures to create edit boot option menu
> > + *
> > + * @bo:              pointer to the boot option
> > + * @header_str:      pointer to the header string
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_show_boot_option(struct eficonfig_boot_option *bo,
> > +                                            char *header_str)
> > +{
> > +     efi_status_t ret;
> > +     struct efimenu *efi_menu;
> > +
> > +     efi_menu = calloc(1, sizeof(struct efimenu));
> > +     if (!efi_menu)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     INIT_LIST_HEAD(&efi_menu->list);
> > +
> > +     ret = create_boot_option_entry(efi_menu, "Description: ", bo->description,
> > +                                    eficonfig_boot_add_enter_description, bo);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = prepare_file_selection_entry(efi_menu, "File: ", &bo->file_info);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = prepare_file_selection_entry(efi_menu, "Initrd File: ", &bo->initrd_info);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = create_boot_option_entry(efi_menu, "Optional Data: ", bo->optional_data,
> > +                                    eficonfig_boot_add_optional_data, bo);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = create_boot_option_entry(efi_menu, "Save", NULL,
> > +                                    eficonfig_boot_edit_save, bo);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = create_boot_option_entry(efi_menu, "Quit", NULL,
> > +                                    eficonfig_process_quit, NULL);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = eficonfig_process_common(efi_menu, header_str);
> > +out:
> > +     eficonfig_destroy(efi_menu);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * fill_file_info() - fill the file info from efi_device_path structure
> > + *
> > + * @dp:              pointer to the device path
> > + * @file_info:       pointer to the file info structure
> > + * @device_dp:       pointer to the volume device path
> > + */
> > +static void fill_file_info(struct efi_device_path *dp,
> > +                        struct eficonfig_select_file_info *file_info,
> > +                        struct efi_device_path *device_dp)
> > +{
> > +     u16 *file_str, *p;
> > +     struct efi_device_path *file_dp = NULL;
> > +
> > +     efi_dp_split_file_path(dp, &device_dp, &file_dp);
> > +     file_info->dp_volume = device_dp;
> > +
> > +     if (file_dp) {
> > +             file_str = efi_dp_str(file_dp);
> > +             /*
> > +              * efi_convert_device_path_to_text() automatically adds u'/' at the
> > +              * beginning of file name, remove u'/' before copying to current_path
> > +              */
> > +             p = file_str;
> > +             if (p[0] == u'/')
> > +                     p++;
> > +
> > +             u16_strcpy(file_info->current_path, p);
> > +             efi_free_pool(file_dp);
> > +             efi_free_pool(file_str);
> > +     }
> > +}
> > +
> > +/**
> > + * eficonfig_edit_boot_option() - prepare boot option structure for editing
> > + *
> > + * Construct the boot option structure and copy the existing value
> > + *
> > + * @varname:         pointer to the UEFI variable name
> > + * @bo:                      pointer to the boot option
> > + * @load_option:     pointer to the load option
> > + * @load_option_size:        size of the load option
> > + * @header_str:              pointer to the header string
> > + * Return    :       status code
> > + */
> > +static efi_status_t eficonfig_edit_boot_option(u16 *varname, struct eficonfig_boot_option *bo,
> > +                                            void *load_option, efi_uintn_t load_option_size,
> > +                                            char *header_str)
> > +{
> > +     size_t len;
> > +     efi_status_t ret;
> > +     char *tmp = NULL, *p;
> > +     struct efi_load_option lo = {0};
> > +     efi_uintn_t final_dp_size;
> > +     struct efi_device_path *dp = NULL;
> > +     efi_uintn_t size = load_option_size;
> > +     struct efi_device_path *final_dp = NULL;
> > +     struct efi_device_path *device_dp = NULL;
> > +     struct efi_device_path *initrd_dp = NULL;
> > +     struct efi_device_path *initrd_device_dp = NULL;
> > +
> > +     const struct efi_initrd_dp id_dp = {
> > +             .vendor = {
> > +                     {
> > +                     DEVICE_PATH_TYPE_MEDIA_DEVICE,
> > +                     DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
> > +                     sizeof(id_dp.vendor),
> > +                     },
> > +                     EFI_INITRD_MEDIA_GUID,
> > +             },
> > +             .end = {
> > +                     DEVICE_PATH_TYPE_END,
> > +                     DEVICE_PATH_SUB_TYPE_END,
> > +                     sizeof(id_dp.end),
> > +             }
> > +     };
> > +
> > +     bo->file_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +     if (!bo->file_info.current_path) {
> > +             ret =  EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +
> > +     bo->initrd_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +     if (!bo->file_info.current_path) {
> > +             ret =  EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +
> > +     bo->description = calloc(1, EFICONFIG_DESCRIPTION_MAX * sizeof(u16));
> > +     if (!bo->description) {
> > +             ret =  EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +
> > +     bo->optional_data = calloc(1, EFICONFIG_OPTIONAL_DATA_MAX * sizeof(u16));
> > +     if (!bo->optional_data) {
> > +             ret =  EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +
> > +     /* copy the preset value */
> > +     if (load_option) {
> > +             ret = efi_deserialize_load_option(&lo, load_option, &size);
> > +             if (ret != EFI_SUCCESS)
> > +                     goto out;
> > +
> > +             if (!lo.label || (lo.label && u16_strlen(lo.label) >= EFICONFIG_DESCRIPTION_MAX)) {
> > +                     ret = EFI_INVALID_PARAMETER;
> > +                     goto out;
> > +             }
> > +             u16_strcpy(bo->description, lo.label);
> > +
> > +             /* EFI image file path is a first instance */
> > +             if (lo.file_path)
> > +                     fill_file_info(lo.file_path, &bo->file_info, device_dp);
> > +
> > +             /* Initrd file path(optional) is placed at second instance. */
> > +             initrd_dp = efi_dp_from_lo(&lo, &efi_lf2_initrd_guid);
> > +             if (initrd_dp) {
> > +                     fill_file_info(initrd_dp, &bo->initrd_info, initrd_device_dp);
> > +                     efi_free_pool(initrd_dp);
> > +             }
> > +
> > +             if (size > 0)
> > +                     memcpy(bo->optional_data, lo.optional_data, size);
> > +     }
> > +
> > +     while (1) {
> > +             ret = eficonfig_show_boot_option(bo, header_str);
> > +             if (ret == EFI_SUCCESS && bo->edit_completed)
> > +                     break;
> > +             if (ret == EFI_NOT_READY)
> > +                     continue;
> > +             if (ret != EFI_SUCCESS)
> > +                     goto out;
> > +     }
> > +
> > +     if (bo->initrd_info.dp_volume) {
> > +             dp = create_selected_device_path(&bo->initrd_info);
> > +             if (!dp) {
> > +                     ret = EFI_OUT_OF_RESOURCES;
> > +                     goto out;
> > +             }
> > +             initrd_dp = efi_dp_append((const struct efi_device_path *)&id_dp, dp);
> > +             efi_free_pool(dp);
> > +     }
> > +
> > +     dp = create_selected_device_path(&bo->file_info);
> > +     if (!dp) {
> > +             ret = EFI_OUT_OF_RESOURCES;
> > +             goto out;
> > +     }
> > +     final_dp_size = efi_dp_size(dp) + sizeof(END);
> > +     if (initrd_dp) {
> > +             final_dp = efi_dp_concat(dp, initrd_dp);
> > +             final_dp_size += efi_dp_size(initrd_dp) + sizeof(END);
> > +     } else {
> > +             final_dp = efi_dp_dup(dp);
> > +     }
> > +     efi_free_pool(dp);
> > +
> > +     if (!final_dp)
> > +             goto out;
> > +
> > +     if (utf16_utf8_strlen(bo->optional_data)) {
> > +             len = utf16_utf8_strlen(bo->optional_data) + 1;
> > +             tmp = calloc(1, len);
> > +             if (!tmp)
> > +                     goto out;
> > +             p = tmp;
> > +             utf16_utf8_strncpy(&p, bo->optional_data, u16_strlen(bo->optional_data));
> > +     }
> > +
> > +     ret = eficonfig_set_boot_option(varname, final_dp, final_dp_size, bo->description, tmp);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +out:
> > +     free(tmp);
> > +     free(bo->optional_data);
> > +     free(bo->description);
> > +     free(bo->file_info.current_path);
> > +     free(bo->initrd_info.current_path);
> > +     efi_free_pool(device_dp);
> > +     efi_free_pool(initrd_device_dp);
> > +     efi_free_pool(initrd_dp);
> > +     efi_free_pool(final_dp);
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_process_add_boot_option() - handler to add boot option
> > + *
> > + * @data:    pointer to the data for each entry
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_process_add_boot_option(void *data)
> > +{
> > +     u16 varname[9];
> > +     efi_status_t ret;
> > +     struct eficonfig_boot_option *bo = NULL;
> > +
> > +     bo = calloc(1, sizeof(struct eficonfig_boot_option));
> > +     if (!bo)
> > +             return EFI_OUT_OF_RESOURCES;
> > +
> > +     ret = eficonfig_get_unused_bootoption(varname, sizeof(varname), &bo->boot_index);
> > +     if (ret != EFI_SUCCESS)
> > +             return ret;
> > +
> > +     ret = eficonfig_edit_boot_option(varname, bo, NULL, 0,  "  ** Add Boot Option ** ");
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +     ret = eficonfig_append_bootorder((u16)bo->boot_index);
> > +     if (ret != EFI_SUCCESS)
> > +             goto out;
> > +
> > +out:
> > +     free(bo);
> > +
> > +     /* to stay the parent menu */
> > +     ret = (ret == EFI_ABORTED) ? EFI_SUCCESS : ret;
> > +
> > +     return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_init() - do required initialization for eficonfig command
> > + *
> > + * Return:   status code
> > + */
> > +static efi_status_t eficonfig_init(void)
> > +{
> > +     efi_status_t ret = EFI_SUCCESS;
> > +     static bool init;
> > +     struct efi_handler *handler;
> > +
> > +     if (!init) {
> > +             ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> > +             if (ret != EFI_SUCCESS)
> > +                     return ret;
> > +
> > +             ret = efi_protocol_open(handler, (void **)&cin, efi_root, NULL,
> > +                                     EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > +             if (ret != EFI_SUCCESS)
> > +                     return ret;
> > +     }
> > +
> > +     init = true;
> > +
> > +     return ret;
> > +}
> > +
> > +static const struct eficonfig_item maintenance_menu_items[] = {
> > +     {"Add Boot Option", eficonfig_process_add_boot_option},
> > +     {"Quit", eficonfig_process_quit},
> > +};
> > +
> > +/**
> > + * do_eficonfig() - execute `eficonfig` command
> > + *
> > + * @cmdtp:   table entry describing command
> > + * @flag:    bitmap indicating how the command was invoked
> > + * @argc:    number of arguments
> > + * @argv:    command line arguments
> > + * Return:   status code
> > + */
> > +static int do_eficonfig(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> > +{
> > +     efi_status_t ret;
> > +     struct efimenu *efi_menu;
> > +
> > +     if (argc > 1)
> > +             return CMD_RET_USAGE;
> > +
> > +     ret = efi_init_obj_list();
> > +     if (ret != EFI_SUCCESS) {
> > +             log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
> > +                     ret & ~EFI_ERROR_MASK);
> > +
> > +             return CMD_RET_FAILURE;
> > +     }
> > +
> > +     ret = eficonfig_init();
> > +     if (ret != EFI_SUCCESS)
> > +             return CMD_RET_FAILURE;
> > +
> > +     while (1) {
> > +             efi_menu = eficonfig_create_fixed_menu(maintenance_menu_items,
> > +                                                    ARRAY_SIZE(maintenance_menu_items));
> > +             if (!efi_menu)
> > +                     return CMD_RET_FAILURE;
> > +
> > +             ret = eficonfig_process_common(efi_menu, "  ** UEFI Maintenance Menu **");
> > +             eficonfig_destroy(efi_menu);
> > +
> > +             if (ret == EFI_ABORTED)
> > +                     break;
> > +     }
> > +
> > +     return CMD_RET_SUCCESS;
> > +}
> > +
> > +U_BOOT_CMD(
> > +     eficonfig, 1, 0, do_eficonfig,
> > +     "provide menu-driven UEFI variable maintenance interface",
> > +     ""
> > +);
> > diff --git a/include/efi_config.h b/include/efi_config.h
> > new file mode 100644
> > index 0000000000..ea5bc4e1bf
> > --- /dev/null
> > +++ b/include/efi_config.h
> > @@ -0,0 +1,96 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + *  Menu-driven UEFI Variable maintenance
> > + *
> > + *  Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> > + */
> > +
> > +#ifndef _EFI_CONFIG_H
> > +#define _EFI_CONFIG_H
> > +
> > +#include <efi_loader.h>
> > +
> > +#define EFICONFIG_ENTRY_NUM_MAX 99
> > +#define EFICONFIG_FILE_PATH_MAX 512
> > +#define EFICONFIG_FILE_PATH_BUF_SIZE (EFICONFIG_FILE_PATH_MAX * sizeof(u16))
> > +
> > +typedef efi_status_t (*eficonfig_entry_func)(void *data);
> > +
> > +/**
> > + * struct eficonfig_entry - menu entry structure
> > + *
> > + * @num:     menu entry index
> > + * @title:   title of entry
> > + * @key:     unique key
> > + * @efi_menu:        pointer to the menu structure
> > + * @func:    callback function to be called when this entry is selected
> > + * @data:    data to be passed to the callback function, caller must free() this pointer
> > + * @list:    list structure
> > + */
> > +struct eficonfig_entry {
> > +     u32 num;
> > +     char *title;
> > +     char key[3];
> > +     struct efimenu *efi_menu;
> > +     eficonfig_entry_func func;
> > +     void *data;
> > +     struct list_head list;
> > +};
> > +
> > +/**
> > + * struct efimenu - efi menu structure
> > + *
> > + * @delay:           delay for autoboot
> > + * @active:          active menu entry index
> > + * @count:           total count of menu entry
> > + * @menu_header:     menu header string
> > + * @list:            menu entry list structure
> > + */
> > +struct efimenu {
> > +     int delay;
> > +     int active;
> > +     int count;
> > +     char *menu_header;
> > +     struct list_head list;
> > +};
> > +
> > +/**
> > + * struct eficonfig_item - structure to construct eficonfig_entry
> > + *
> > + * @title:   title of entry
> > + * @func:    callback function to be called when this entry is selected
> > + * @data:    data to be passed to the callback function
> > + */
> > +struct eficonfig_item {
> > +     char *title;
> > +     eficonfig_entry_func func;
> > +     void *data;
> > +};
> > +
> > +/**
> > + * struct eficonfig_select_file_info - structure to be used for file selection
> > + *
> > + * @current_volume:  pointer to the efi_simple_file_system_protocol
> > + * @dp_volume:               pointer to device path of the selected device
> > + * @current_path:    pointer to the selected file path string
> > + * @filepath_list:   list_head structure for file path list
> > + * @file_selectred:  flag indicates file selecting status
> > + */
> > +struct eficonfig_select_file_info {
> > +     struct efi_simple_file_system_protocol *current_volume;
> > +     struct efi_device_path *dp_volume;
> > +     u16 *current_path;
> > +     struct list_head filepath_list;
> > +     bool file_selected;
> > +};
> > +
> > +void eficonfig_print_msg(char *msg);
> > +void eficonfig_destroy(struct efimenu *efi_menu);
> > +efi_status_t eficonfig_process_quit(void *data);
> > +efi_status_t eficonfig_process_common(struct efimenu *efi_menu, char *menu_header);
> > +efi_status_t eficonfig_select_file_handler(void *data);
> > +efi_status_t eficonfig_get_unused_bootoption(u16 *buf,
> > +                                          efi_uintn_t buf_size, u32 *index);
> > +efi_status_t eficonfig_append_bootorder(u16 index);
> > +
> > +#endif
> > diff --git a/include/efi_loader.h b/include/efi_loader.h
> > index b0d6fff67c..4461f721e0 100644
> > --- a/include/efi_loader.h
> > +++ b/include/efi_loader.h
> > @@ -142,6 +142,11 @@ static inline efi_status_t efi_launch_capsules(void)
> >       EFI_GUID(0x63293792, 0xadf5, 0x9325, \
> >                0xb9, 0x9f, 0x4e, 0x0e, 0x45, 0x5c, 0x1b, 0x1e)
> >
> > +/* GUID for the auto generated boot menu entry */
> > +#define EFICONFIG_AUTO_GENERATED_ENTRY_GUID \
> > +     EFI_GUID(0x38c1acc1, 0x9fc0, 0x41f0, \
> > +              0xb9, 0x01, 0xfa, 0x74, 0xd6, 0xd6, 0xe4, 0xde)
> > +
> >   /* Use internal device tree when starting UEFI application */
> >   #define EFI_FDT_USE_INTERNAL NULL
> >
> > @@ -226,6 +231,9 @@ const char *__efi_nesting_dec(void);
> >   #define EFI_CACHELINE_SIZE 128
> >   #endif
> >
> > +/* max bootmenu title size for volume selection */
> > +#define BOOTMENU_DEVICE_NAME_MAX 16
> > +
> >   /* Key identifying current memory map */
> >   extern efi_uintn_t efi_memory_map_key;
> >
> > @@ -249,6 +257,9 @@ extern const struct efi_hii_string_protocol efi_hii_string;
> >
> >   uint16_t *efi_dp_str(struct efi_device_path *dp);
> >
> > +/* GUID for the auto generated boot menu entry */
> > +extern const efi_guid_t efi_guid_bootmenu_auto_generated;
> > +
> >   /* GUID of the U-Boot root node */
> >   extern const efi_guid_t efi_u_boot_guid;
> >   #ifdef CONFIG_SANDBOX
> > @@ -314,6 +325,8 @@ extern const efi_guid_t efi_guid_firmware_management_protocol;
> >   extern const efi_guid_t efi_esrt_guid;
> >   /* GUID of the SMBIOS table */
> >   extern const efi_guid_t smbios_guid;
> > +/*GUID of console */
> > +extern const efi_guid_t efi_guid_text_input_protocol;
> >
> >   extern char __efi_runtime_start[], __efi_runtime_stop[];
> >   extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
> > @@ -1064,4 +1077,28 @@ efi_status_t efi_esrt_populate(void);
> >   efi_status_t efi_load_capsule_drivers(void);
> >
> >   efi_status_t platform_get_eventlog(struct udevice *dev, u64 *addr, u32 *sz);
> > +
> > +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> > +                                       const efi_guid_t *protocol, void *search_key,
> > +                                       efi_uintn_t *no_handles, efi_handle_t **buffer);
> > +
> > +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> > +                              struct efi_file_handle **root);
> > +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > +                            struct efi_file_handle **new_handle,
> > +                            u16 *file_name, u64 open_mode,
> > +                            u64 attributes);
> > +efi_status_t efi_file_close_int(struct efi_file_handle *file);
> > +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > +                            efi_uintn_t *buffer_size, void *buffer);
> > +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos);
> > +
> > +typedef efi_status_t (*efi_console_filter_func)(struct efi_input_key *key);
> > +efi_status_t efi_console_get_u16_string
> > +             (struct efi_simple_text_input_protocol *cin,
> > +              u16 *buf, efi_uintn_t count, efi_console_filter_func filer_func,
> > +              int row, int col);
> > +
> > +efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size);
> > +
> >   #endif /* _EFI_LOADER_H */
> > diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
> > index 234073ecb7..ede9116b3c 100644
> > --- a/lib/efi_loader/efi_bootmgr.c
> > +++ b/lib/efi_loader/efi_bootmgr.c
> > @@ -19,6 +19,9 @@
> >   static const struct efi_boot_services *bs;
> >   static const struct efi_runtime_services *rs;
> >
> > +const efi_guid_t efi_guid_bootmenu_auto_generated =
> > +             EFICONFIG_AUTO_GENERATED_ENTRY_GUID;
> > +
> >   /*
> >    * bootmgr implements the logic of trying to find a payload to boot
> >    * based on the BootOrder + BootXXXX variables, and then loading it.
> > diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> > index 4da64b5d29..1233418e77 100644
> > --- a/lib/efi_loader/efi_boottime.c
> > +++ b/lib/efi_loader/efi_boottime.c
> > @@ -2453,6 +2453,35 @@ static efi_status_t EFIAPI efi_protocols_per_handle(
> >       return EFI_EXIT(EFI_SUCCESS);
> >   }
> >
> > +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> > +                                       const efi_guid_t *protocol, void *search_key,
> > +                                       efi_uintn_t *no_handles, efi_handle_t **buffer)
> > +{
> > +     efi_status_t r;
> > +     efi_uintn_t buffer_size = 0;
> > +
> > +     if (!no_handles || !buffer) {
> > +             r = EFI_INVALID_PARAMETER;
> > +             goto out;
> > +     }
> > +     *no_handles = 0;
> > +     *buffer = NULL;
> > +     r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > +                           *buffer);
> > +     if (r != EFI_BUFFER_TOO_SMALL)
> > +             goto out;
> > +     r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> > +                           (void **)buffer);
> > +     if (r != EFI_SUCCESS)
> > +             goto out;
> > +     r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > +                           *buffer);
> > +     if (r == EFI_SUCCESS)
> > +             *no_handles = buffer_size / sizeof(efi_handle_t);
> > +out:
> > +     return r;
> > +}
> > +
> >   /**
> >    * efi_locate_handle_buffer() - locate handles implementing a protocol
> >    * @search_type: selection criterion
> > @@ -2474,30 +2503,13 @@ efi_status_t EFIAPI efi_locate_handle_buffer(
> >                       efi_uintn_t *no_handles, efi_handle_t **buffer)
> >   {
> >       efi_status_t r;
> > -     efi_uintn_t buffer_size = 0;
> >
> >       EFI_ENTRY("%d, %pUs, %p, %p, %p", search_type, protocol, search_key,
> >                 no_handles, buffer);
> >
> > -     if (!no_handles || !buffer) {
> > -             r = EFI_INVALID_PARAMETER;
> > -             goto out;
> > -     }
> > -     *no_handles = 0;
> > -     *buffer = NULL;
> > -     r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > -                           *buffer);
> > -     if (r != EFI_BUFFER_TOO_SMALL)
> > -             goto out;
> > -     r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> > -                           (void **)buffer);
> > -     if (r != EFI_SUCCESS)
> > -             goto out;
> > -     r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > -                           *buffer);
> > -     if (r == EFI_SUCCESS)
> > -             *no_handles = buffer_size / sizeof(efi_handle_t);
> > -out:
> > +     r = efi_locate_handle_buffer_int(search_type, protocol, search_key,
> > +                                      no_handles, buffer);
> > +
> >       return EFI_EXIT(r);
> >   }
> >
> > diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
> > index 3164fd484e..5be509f0d6 100644
> > --- a/lib/efi_loader/efi_console.c
> > +++ b/lib/efi_loader/efi_console.c
> > @@ -7,6 +7,7 @@
> >
> >   #define LOG_CATEGORY LOGC_EFI
> >
> > +#include <ansi.h>
> >   #include <common.h>
> >   #include <charset.h>
> >   #include <malloc.h>
> > @@ -1318,3 +1319,72 @@ out_of_memory:
> >       printf("ERROR: Out of memory\n");
> >       return r;
> >   }
> > +
> > +/**
> > + * efi_console_get_u16_string() - get user input string
> > + *
> > + * @cin:             protocol interface to EFI_SIMPLE_TEXT_INPUT_PROTOCOL
> > + * @buf:             buffer to store user input string in UTF16
> > + * @count:           number of u16 string including NULL terminator that buf has
> > + * @filter_func:     callback to filter user input
> > + * @row:             row number to locate user input form
> > + * @col:             column number to locate user input form
> > + * Return:           status code
> > + */
> > +efi_status_t efi_console_get_u16_string(struct efi_simple_text_input_protocol *cin,
> > +                                     u16 *buf, efi_uintn_t count,
> > +                                     efi_console_filter_func filter_func,
> > +                                     int row, int col)
> > +{
> > +     efi_status_t ret;
> > +     efi_uintn_t len = 0;
> > +     struct efi_input_key key;
> > +
> > +     printf(ANSI_CURSOR_POSITION
> > +            ANSI_CLEAR_LINE_TO_END
> > +            ANSI_CURSOR_SHOW, row, col);
> > +
> > +     ret = EFI_CALL(cin->reset(cin, false));
> > +     if (ret != EFI_SUCCESS)
> > +             return ret;
> > +
> > +     for (;;) {
> > +             do {
> > +                     ret = EFI_CALL(cin->read_key_stroke(cin, &key));
> > +                     mdelay(10);
> > +             } while (ret == EFI_NOT_READY);
> > +
> > +             if (key.unicode_char == u'\b') {
> > +                     if (len > 0)
> > +                             buf[--len] = u'\0';
> > +
> > +                     printf(ANSI_CURSOR_POSITION
> > +                            "%ls"
> > +                            ANSI_CLEAR_LINE_TO_END, row, col, buf);
> > +                     continue;
> > +             } else if (key.unicode_char == u'\r') {
> > +                     buf[len] = u'\0';
> > +                     return EFI_SUCCESS;
> > +             } else if (key.unicode_char == 0x3 || key.scan_code == 23) {
> > +                     return EFI_ABORTED;
> > +             } else if (key.unicode_char < 0x20) {
> > +                     /* ignore control codes other than Ctrl+C, '\r' and '\b' */
> > +                     continue;
> > +             } else if (key.scan_code != 0) {
> > +                     /* only accept single ESC press for cancel */
> > +                     continue;
> > +             }
> > +
> > +             if (filter_func) {
> > +                     if (filter_func(&key) != EFI_SUCCESS)
> > +                             continue;
> > +             }
> > +
> > +             if (len >= (count - 1))
> > +                     continue;
> > +
> > +             buf[len] = key.unicode_char;
> > +             len++;
> > +             printf(ANSI_CURSOR_POSITION "%ls", row, col, buf);
> > +     }
> > +}
> > diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
> > index f269abf135..a34ca46a11 100644
> > --- a/lib/efi_loader/efi_disk.c
> > +++ b/lib/efi_loader/efi_disk.c
> > @@ -760,3 +760,53 @@ efi_status_t efi_disk_init(void)
> >
> >       return EFI_SUCCESS;
> >   }
> > +
> > +/**
> > + * efi_disk_get_device_name() - get U-Boot device name associated with EFI handle
> > + *
> > + * @handle:  pointer to the EFI handle
> > + * @buf:     pointer to the buffer to store the string
> > + * @size:    size of buffer
> > + * Return:   status code
> > + */
> > +efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int size)
> > +{
> > +     int count;
> > +     int diskid;
> > +     enum uclass_id id;
> > +     unsigned int part;
> > +     struct udevice *dev;
> > +     struct blk_desc *desc;
> > +     const char *if_typename;
> > +     bool is_partition = false;
> > +     struct disk_part *part_data;
> > +
> > +     if (!handle || !buf || !size)
> > +             return EFI_INVALID_PARAMETER;
> > +
> > +     dev = handle->dev;
> > +     id = device_get_uclass_id(dev);
> > +     if (id == UCLASS_BLK) {
> > +             desc = dev_get_uclass_plat(dev);
> > +     } else if (id == UCLASS_PARTITION) {
> > +             desc = dev_get_uclass_plat(dev_get_parent(dev));
> > +             is_partition = true;
> > +     } else {
> > +             return EFI_INVALID_PARAMETER;
> > +     }
> > +     if_typename = blk_get_if_type_name(desc->if_type);
> > +     diskid = desc->devnum;
> > +
> > +     if (is_partition) {
> > +             part_data = dev_get_uclass_plat(dev);
> > +             part = part_data->partnum;
> > +             count = snprintf(buf, size, "%s %d:%d", if_typename, diskid, part);
> > +     } else {
> > +             count = snprintf(buf, size, "%s %d", if_typename, diskid);
> > +     }
> > +
> > +     if (count < 0 || (count + 1) > size)
> > +             return EFI_INVALID_PARAMETER;
> > +
> > +     return EFI_SUCCESS;
> > +}
> > diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
> > index 7a7077e6d0..c96a7f7ca3 100644
> > --- a/lib/efi_loader/efi_file.c
> > +++ b/lib/efi_loader/efi_file.c
> > @@ -246,10 +246,10 @@ error:
> >       return NULL;
> >   }
> >
> > -static efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > -                                   struct efi_file_handle **new_handle,
> > -                                   u16 *file_name, u64 open_mode,
> > -                                   u64 attributes)
> > +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > +                            struct efi_file_handle **new_handle,
> > +                            u16 *file_name, u64 open_mode,
> > +                            u64 attributes)
> >   {
> >       struct file_handle *fh = to_fh(this);
> >       efi_status_t ret;
> > @@ -369,11 +369,17 @@ static efi_status_t file_close(struct file_handle *fh)
> >       return EFI_SUCCESS;
> >   }
> >
> > -static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> > +efi_status_t efi_file_close_int(struct efi_file_handle *file)
> >   {
> >       struct file_handle *fh = to_fh(file);
> > +
> > +     return file_close(fh);
> > +}
> > +
> > +static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> > +{
> >       EFI_ENTRY("%p", file);
> > -     return EFI_EXIT(file_close(fh));
> > +     return EFI_EXIT(efi_file_close_int(file));
> >   }
> >
> >   static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
> > @@ -562,8 +568,8 @@ static efi_status_t dir_read(struct file_handle *fh, u64 *buffer_size,
> >       return EFI_SUCCESS;
> >   }
> >
> > -static efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > -                                   efi_uintn_t *buffer_size, void *buffer)
> > +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > +                            efi_uintn_t *buffer_size, void *buffer)
> >   {
> >       struct file_handle *fh = to_fh(this);
> >       efi_status_t ret = EFI_SUCCESS;
> > @@ -773,24 +779,11 @@ out:
> >       return EFI_EXIT(ret);
> >   }
> >
> > -/**
> > - * efi_file_setpos() - set current position in file
> > - *
> > - * This function implements the SetPosition service of the EFI file protocol.
> > - * See the UEFI spec for details.
> > - *
> > - * @file:    file handle
> > - * @pos:     new file position
> > - * Return:   status code
> > - */
> > -static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> > -                                        u64 pos)
> > +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos)
> >   {
> >       struct file_handle *fh = to_fh(file);
> >       efi_status_t ret = EFI_SUCCESS;
> >
> > -     EFI_ENTRY("%p, %llu", file, pos);
> > -
> >       if (fh->isdir) {
> >               if (pos != 0) {
> >                       ret = EFI_UNSUPPORTED;
> > @@ -812,6 +805,28 @@ static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> >       fh->offset = pos;
> >
> >   error:
> > +     return ret;
> > +}
> > +
> > +/**
> > + * efi_file_setpos() - set current position in file
> > + *
> > + * This function implements the SetPosition service of the EFI file protocol.
> > + * See the UEFI spec for details.
> > + *
> > + * @file:    file handle
> > + * @pos:     new file position
> > + * Return:   status code
> > + */
> > +static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> > +                                        u64 pos)
> > +{
> > +     efi_status_t ret = EFI_SUCCESS;
> > +
> > +     EFI_ENTRY("%p, %llu", file, pos);
> > +
> > +     ret = efi_file_setpos_int(file, pos);
> > +
> >       return EFI_EXIT(ret);
> >   }
> >
> > @@ -1138,17 +1153,23 @@ struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp)
> >       return f;
> >   }
> >
> > +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> > +                              struct efi_file_handle **root)
> > +{
> > +     struct file_system *fs = to_fs(this);
> > +
> > +     *root = file_open(fs, NULL, NULL, 0, 0);
> > +
> > +     return EFI_SUCCESS;
> > +}
> > +
> >   static efi_status_t EFIAPI
> >   efi_open_volume(struct efi_simple_file_system_protocol *this,
> >               struct efi_file_handle **root)
> >   {
> > -     struct file_system *fs = to_fs(this);
> > -
> >       EFI_ENTRY("%p, %p", this, root);
> >
> > -     *root = file_open(fs, NULL, NULL, 0, 0);
> > -
> > -     return EFI_EXIT(EFI_SUCCESS);
> > +     return EFI_EXIT(efi_open_volume_int(this, root));
> >   }
> >
> >   struct efi_simple_file_system_protocol *
>