On 4/29/22 12:56, Heinrich Schuchardt wrote:
On 4/28/22 18:33, Heinrich Schuchardt wrote:
On 4/28/22 10:09, Masahisa Kojima wrote:
This commit supports the menu-driven UEFI boot option addition.
User can select the block device volume having
efi_simple_file_system_protocol and select the file corresponding
to the Boot#### variable. Then user enter the label of the BOOT####
variable in utf8.

Signed-off-by: Masahisa Kojima <masahisa.koj...@linaro.org>
---
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/bootmenu.c                            |  69 +-
  include/efi_loader.h                      |  37 +
  lib/efi_loader/Makefile                   |   1 +
  lib/efi_loader/efi_bootmenu_maintenance.c | 862 ++++++++++++++++++++++
  lib/efi_loader/efi_boottime.c             |  52 +-
  lib/efi_loader/efi_console.c              |  81 ++
  lib/efi_loader/efi_disk.c                 |  11 +
  lib/efi_loader/efi_file.c                 |  75 +-
  8 files changed, 1133 insertions(+), 55 deletions(-)
  create mode 100644 lib/efi_loader/efi_bootmenu_maintenance.c

diff --git a/cmd/bootmenu.c b/cmd/bootmenu.c
index eb23afdd41..860cb83182 100644
--- a/cmd/bootmenu.c
+++ b/cmd/bootmenu.c
@@ -21,6 +21,8 @@

  /* maximum bootmenu entries */
  #define MAX_COUNT    99
+#define STATIC_ENTRY 2
+#define MAX_DYNAMIC_ENTRY (MAX_COUNT - STATIC_ENTRY)

  /* maximal size of bootmenu env
   *  9 = strlen("bootmenu_")
@@ -41,10 +43,11 @@ enum boot_type {
      BOOTMENU_TYPE_BOOTMENU,
      BOOTMENU_TYPE_UEFI_BOOT_OPTION,
      BOOTMENU_TYPE_DISTRO_BOOT,
+    BOOTMENU_TYPE_UEFI_MAINTENANCE,
  };

  struct bootmenu_entry {
-    unsigned short int num;        /* unique number 0 .. MAX_COUNT */
+    unsigned short int num;        /* unique number 0 .. MAX_DYNAMIC_ENTRY */
      char key[3];            /* key identifier of number */
      u16 *title;            /* title of entry */
      char *command;            /* hush command of entry */
@@ -58,7 +61,7 @@ static char *bootmenu_getoption(unsigned short int n)
  {
      char name[MAX_ENV_SIZE];

-    if (n > MAX_COUNT)
+    if (n > MAX_DYNAMIC_ENTRY)
          return NULL;

      sprintf(name, "bootmenu_%d", n);
@@ -229,7 +232,7 @@ static int prepare_bootmenu_entry(struct bootmenu_data *menu,
          iter = entry;
          ++i;

-        if (i == MAX_COUNT - 1)
+        if (i == MAX_DYNAMIC_ENTRY)
              break;
      }

@@ -317,7 +320,7 @@ static int prepare_uefi_bootorder_entry(struct bootmenu_data *menu,

          free(load_option);

-        if (i == MAX_COUNT - 1)
+        if (i == MAX_DYNAMIC_ENTRY)
              break;
      }

@@ -481,7 +484,7 @@ static int prepare_distro_boot_entry(struct bootmenu_data *menu,
          iter = entry;
          i++;

-        if (i == MAX_COUNT - 1)
+        if (i == MAX_DYNAMIC_ENTRY)
              break;

          token = strtok(NULL, " ");
@@ -520,19 +523,56 @@ static struct bootmenu_data *bootmenu_create(int delay)
          goto cleanup;

      if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
-        if (i < MAX_COUNT - 1) {
+        if (i < MAX_DYNAMIC_ENTRY) {
              ret = prepare_uefi_bootorder_entry(menu, &iter, &i);
              if (ret < 0 && ret != -ENOENT)
                  goto cleanup;
          }
      }

-    if (i < MAX_COUNT - 1) {
+    if (i < MAX_DYNAMIC_ENTRY) {
          ret = prepare_distro_boot_entry(menu, &iter, &i);
          if (ret < 0 && ret != -ENOENT)
              goto cleanup;
      }

+    if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
+        /* Add UEFI Boot Manager Maintenance entry */
+        if (i <= MAX_DYNAMIC_ENTRY) {
+            entry = malloc(sizeof(struct bootmenu_entry));
+            if (!entry)
+                goto cleanup;
+
+            entry->title = u16_strdup(u"UEFI Boot Manager Maintenance");
+            if (!entry->title) {
+                free(entry);
+                goto cleanup;
+            }
+
+            entry->command = strdup("");
+            if (!entry->command) {
+                free(entry->title);
+                free(entry);
+                goto cleanup;
+            }
+
+            sprintf(entry->key, "%d", i);
+
+            entry->num = i;
+            entry->menu = menu;
+            entry->type = BOOTMENU_TYPE_UEFI_MAINTENANCE;
+            entry->next = NULL;
+
+            if (!iter)
+                menu->first = entry;
+            else
+                iter->next = entry;
+
+            iter = entry;
+            i++;
+        }
+    }
+
      /* Add U-Boot console entry at the end */
      if (i <= MAX_COUNT - 1) {
          entry = malloc(sizeof(struct bootmenu_entry));
@@ -704,6 +744,12 @@ static enum bootmenu_ret bootmenu_show(int delay)
          title = u16_strdup(iter->title);
          command = strdup(iter->command);

+        if (iter->type == BOOTMENU_TYPE_UEFI_MAINTENANCE) {
+            efi_bootmenu_show_maintenance_menu();

This does not compile for CONFIG_EFI_LOADER=n.
And it is not needed for CONFIG_CMD_BOOTEFI_BOOTMGR=n.

+            ret = BOOTMENU_RET_UPDATED;
+            goto cleanup;
+        }
+
          /* last entry is U-Boot console or Quit */
          if (iter->num == iter->menu->count - 1) {
              ret = BOOTMENU_RET_QUIT;
@@ -794,6 +840,7 @@ int do_bootmenu(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  {
      char *delay_str = NULL;
      int delay = 10;
+    int ret;

  #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
      delay = CONFIG_BOOTDELAY;
@@ -808,7 +855,13 @@ int do_bootmenu(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
      if (delay_str)
          delay = (int)simple_strtol(delay_str, NULL, 10);

-    bootmenu_show(delay);
+    while (1) {
+        ret =  bootmenu_show(delay);
+        delay = -1;
+        if (ret != BOOTMENU_RET_UPDATED)
+            break;
+    }
+
      return 0;
  }

diff --git a/include/efi_loader.h b/include/efi_loader.h
index effb43369d..533618341b 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -226,6 +226,9 @@ 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;

@@ -312,6 +315,9 @@ 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 const efi_guid_t efi_guid_text_output_protocol;

  extern char __efi_runtime_start[], __efi_runtime_stop[];
  extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
@@ -871,6 +877,8 @@ efi_status_t efi_set_load_options(efi_handle_t handle,
                    void *load_options);
  efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);

+efi_status_t efi_bootmenu_show_maintenance_menu(void);
+
  /**
   * struct efi_image_regions - A list of memory regions
   *
@@ -1042,4 +1050,33 @@ 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,
+         struct efi_simple_text_output_protocol *cout,
+         u16 *buf, efi_uintn_t count, efi_console_filter_func filer_func,
+         int row, int col);
+
+efi_status_t efi_bootmenu_get_unused_bootoption(u16 *buf,
+                        efi_uintn_t buf_size, u32 *index);
+efi_status_t efi_bootmenu_append_bootorder(u16 index);
+
+efi_status_t efi_disk_get_device_name(struct efi_block_io *this, char *buf, int size);
+
  #endif /* _EFI_LOADER_H */
diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index aaaa25cefe..792eabe18a 100644
--- a/lib/efi_loader/Makefile
+++ b/lib/efi_loader/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_EFI_TCG2_PROTOCOL) += efi_tcg2.o
  obj-$(CONFIG_EFI_RISCV_BOOT_PROTOCOL) += efi_riscv.o
  obj-$(CONFIG_EFI_LOAD_FILE2_INITRD) += efi_load_initrd.o
  obj-$(CONFIG_EFI_SIGNATURE_SUPPORT) += efi_signature.o
+obj-$(CONFIG_CMD_BOOTMENU) += efi_bootmenu_maintenance.o

Why should we compile this for CONFIG_CMD_BOOTEFI_BOOTMGR=n?

Best regards

Heinrich


  EFI_VAR_SEED_FILE := $(subst $\",,$(CONFIG_EFI_VAR_SEED_FILE))
  $(obj)/efi_var_seed.o: $(srctree)/$(EFI_VAR_SEED_FILE)
diff --git a/lib/efi_loader/efi_bootmenu_maintenance.c b/lib/efi_loader/efi_bootmenu_maintenance.c
new file mode 100644
index 0000000000..77401a7829
--- /dev/null
+++ b/lib/efi_loader/efi_bootmenu_maintenance.c
@@ -0,0 +1,862 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Menu-driven UEFI Boot Variable maintenance
+ *
+ *  Copyright (c) 2022 Masahisa Kojima, Linaro Limited
+ */
+
+#define LOG_CATEGORY LOGC_EFI
+
+#include <ansi.h>
+#include <common.h>
+#include <charset.h>
+#include <log.h>
+#include <malloc.h>
+#include <menu.h>
+#include <efi_loader.h>
+#include <efi_variable.h>
+#include <asm/unaligned.h>
+
+static struct efi_simple_text_input_protocol *cin;
+static struct efi_simple_text_output_protocol *cout;
+
+#define EFI_BOOTMENU_ENTRY_NUM_MAX 99
+#define EFI_BOOTMENU_FILE_PATH_MAX 512
+#define EFI_BOOTMENU_FILE_PATH_BUF_SIZE (EFI_BOOTMENU_FILE_PATH_MAX * sizeof(u16))
+#define EFI_BOOTMENU_BOOT_NAME_MAX 32
+#define EFI_BOOT_ORDER_MAX_SIZE_IN_DECIMAL 6
+
+typedef efi_status_t (*efi_bootmenu_entry_func)(void *data, bool *exit);
+
+/**
+ * struct efi_bootmenu_entry - menu entry structure
+ *
+ * @num:        menu entry index
+ * @title:        title of entry
+ * @key:        unique key
+ * @bootmgr_menu:    pointer to the menu structure
+ * @next:        pointer to the next entry
+ * @func:        callback function to be called when this entry is selected
+ * @data:        data to be passed to the callback function
+ */
+struct efi_bootmenu_entry {
+    u32 num;
+    u16 *title;
+    char key[6];
+    struct efi_bootmenu *bootmgr_menu;
+    struct efi_bootmenu_entry *next;
+    efi_bootmenu_entry_func func;
+    void *data;
+};
+
+/**
+ * struct efi_bootmenu - bootmgr menu structure
+ *
+ * @delay:    delay for autoboot
+ * @active:    active menu entry index
+ * @count:    total count of menu entry
+ * @first:    pointer to the first menu entry
+ */
+struct efi_bootmenu {
+    int delay;
+    int active;
+    int count;
+    struct efi_bootmenu_entry *first;
+};
+
+struct efi_bootmenu_item {
+    u16 *title;
+    efi_bootmenu_entry_func func;
+    void *data;
+};
+
+struct efi_bootmenu_boot_option {
+    struct efi_simple_file_system_protocol *current_volume;
+    struct efi_device_path *dp_volume;
+    u16 *current_path;
+    u16 *boot_name;
+    bool file_selected;
+};
+
+static const struct efi_device_path END = {
+    .type     = DEVICE_PATH_TYPE_END,
+    .sub_type = DEVICE_PATH_SUB_TYPE_END,
+    .length   = sizeof(END),
+};
+
+struct efi_bootmenu_volume_entry_data {
+    struct efi_bootmenu_boot_option *bo;
+    struct efi_simple_file_system_protocol *v;
+    struct efi_device_path *dp;
+};
+
+struct efi_bootmenu_file_entry_data {
+    struct efi_bootmenu_boot_option *bo;
+    bool is_directory;
+    u16 *file_name;
+};
+
+static void efi_bootmenu_print_entry(void *data)
+{
+    struct efi_bootmenu_entry *entry = data;
+    int reverse = (entry->bootmgr_menu->active == entry->num);
+
+    /* TODO: support scroll or page for many entries */
+
+    /*
+     * Move cursor to line where the entry will be drown (entry->count)

%s/drown/drawn/

+     * First 3 lines contain bootmgr menu header + one empty line
+     * For the last "Quit" entry, add one empty line
+     */
+    if (entry->num == (entry->bootmgr_menu->count - 1))
+        printf(ANSI_CURSOR_POSITION, entry->num + 5, 1);
+    else
+        printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);
+
+    puts("     ");
+
+    if (reverse)
+        puts(ANSI_COLOR_REVERSE);
+
+    printf("%ls", entry->title);
+
+    if (reverse)
+        puts(ANSI_COLOR_RESET);
+}
+
+static void efi_bootmenu_display_statusline(struct menu *m)
+{
+    struct efi_bootmenu_entry *entry;
+    struct efi_bootmenu *bootmgr_menu;
+
+    if (menu_default_choice(m, (void *)&entry) < 0)
+        return;
+
+    bootmgr_menu = entry->bootmgr_menu;
+
+    printf(ANSI_CURSOR_POSITION, 1, 1);
+    puts(ANSI_CLEAR_LINE);
+    printf(ANSI_CURSOR_POSITION, 2, 1);
+    puts("  *** U-Boot EFI Boot Manager ***");
+    puts(ANSI_CLEAR_LINE_TO_END);
+    printf(ANSI_CURSOR_POSITION, 3, 1);
+    puts(ANSI_CLEAR_LINE);
+
+    /* First 3 lines are bootmgr_menu header + 2 empty lines between entries */
+    printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 5, 1);
+    puts(ANSI_CLEAR_LINE);
+    printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 6, 1);
+    puts("  Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit");
+    puts(ANSI_CLEAR_LINE_TO_END);
+    printf(ANSI_CURSOR_POSITION, bootmgr_menu->count + 7, 1);
+    puts(ANSI_CLEAR_LINE);
+}
+
+static char *efi_bootmenu_choice_entry(void *data)
+{
+    int i;
+    int esc = 0;
+    struct efi_bootmenu_entry *iter;
+    enum bootmenu_key key = KEY_NONE;
+    struct efi_bootmenu *bootmgr_menu = data;
+
+    while (1) {
+        if (bootmgr_menu->delay >= 0) {
+            /* Autoboot was not stopped */
+            bootmenu_autoboot_loop((struct bootmenu_data *)bootmgr_menu, &key, &esc);
+        } else {
+            /* Some key was pressed, so autoboot was stopped */
+            bootmenu_loop((struct bootmenu_data *)bootmgr_menu, &key, &esc);
+        }
+
+        if (bootmgr_menu->delay == 0)
+            key = KEY_QUIT;
+
+        switch (key) {
+        case KEY_UP:
+            if (bootmgr_menu->active > 0)
+                --bootmgr_menu->active;
+            /* no menu key selected, regenerate menu */
+            return NULL;
+        case KEY_DOWN:
+            if (bootmgr_menu->active < bootmgr_menu->count - 1)
+                ++bootmgr_menu->active;
+            /* no menu key selected, regenerate menu */
+            return NULL;
+        case KEY_SELECT:
+            iter = bootmgr_menu->first;
+            for (i = 0; i < bootmgr_menu->active; ++i)
+                iter = iter->next;
+            return iter->key;
+        case KEY_QUIT:
+            /* Quit by choosing the last entry */
+            iter = bootmgr_menu->first;
+            while (iter->next)
+                iter = iter->next;
+            return iter->key;
+        default:
+            break;
+        }
+    }
+
+    /* never happens */
+    debug("bootmgr menu: this should not happen");
+    return NULL;
+}
+
+static void efi_bootmenu_destroy(struct efi_bootmenu *bootmgr_menu)
+{
+    struct efi_bootmenu_entry *next;
+    struct efi_bootmenu_entry *iter = bootmgr_menu->first;
+
+    while (iter) {
+        next = iter->next;
+        free(iter);
+        iter = next;
+    }
+    free(bootmgr_menu);
+}
+
+/**
+ * efi_bootmenu_process_common() - main handler for uefi bootmgr menu
+ *
+ * Construct the structures required to show the menu, then handle
+ * the user input intracting with u-boot menu functions.
+ *
+ * @items:    pointer to the structure of each menu entry
+ * @count:    the number of menu entry
+ * @delay:    delay for autoboot/autoselect
+ * Return:    status code
+ */
+static efi_status_t efi_bootmenu_process_common(const struct efi_bootmenu_item *items,
+                        int count, int delay)
+{
+    u32 i;
+    bool exit = false;
+    efi_status_t ret;
+    struct menu *menu;
+    void *choice = NULL;
+    struct efi_bootmenu_entry *entry;
+    struct efi_bootmenu *bootmgr_menu;
+    struct efi_bootmenu_entry *iter = NULL;
+
+    if (count > EFI_BOOTMENU_ENTRY_NUM_MAX)
+        return EFI_OUT_OF_RESOURCES;
+
+    bootmgr_menu = calloc(1, sizeof(struct efi_bootmenu));
+    if (!bootmgr_menu)
+        return EFI_OUT_OF_RESOURCES;
+
+    bootmgr_menu->delay = delay;
+    bootmgr_menu->active = 0;
+    bootmgr_menu->first = NULL;
+
+    for (i = 0; i < count; i++) {
+        entry = calloc(1, sizeof(struct efi_bootmenu_entry));
+        if (!entry) {
+            ret = EFI_LOAD_ERROR;
+            goto out;
+        }
+
+        entry->num = i;
+        entry->title = items->title;
+        snprintf(entry->key, sizeof(entry->key), "%04X", i);
+        entry->bootmgr_menu = bootmgr_menu;
+        entry->func = items->func;
+        entry->data = items->data;
+        entry->next = NULL;
+
+        if (!iter)
+            bootmgr_menu->first = entry;
+        else
+            iter->next = entry;
+
+        iter = entry;
+        items++;
+    }
+    bootmgr_menu->count = count;
+
+    menu = menu_create(NULL, 0, 1, efi_bootmenu_display_statusline,
+               efi_bootmenu_print_entry, efi_bootmenu_choice_entry,
+               bootmgr_menu);
+    if (!menu) {
+        ret = EFI_INVALID_PARAMETER;
+        goto out;
+    }
+
+    for (entry = bootmgr_menu->first; entry; entry = entry->next) {
+        if (!menu_item_add(menu, entry->key, entry)) {
+            ret = EFI_INVALID_PARAMETER;
+            goto out;
+        }
+    }
+
+    menu_default_set(menu, bootmgr_menu->first->key);
+
+    while (!exit) {
+        puts(ANSI_CURSOR_HIDE);
+        puts(ANSI_CLEAR_CONSOLE);
+        printf(ANSI_CURSOR_POSITION, 1, 1);
+
+        if (menu_get_choice(menu, &choice)) {
+            entry = choice;
+            if (entry->func)
+                ret = entry->func(entry->data, &exit);
+
+            /* last entry "Quit" is selected, exit this menu */
+            if (entry->num == (entry->bootmgr_menu->count - 1)) {
+                ret = EFI_ABORTED;
+                break;
+            }
+        }
+    }
+
+out:
+    menu_destroy(menu);
+    efi_bootmenu_destroy(bootmgr_menu);
+
+    puts(ANSI_CLEAR_CONSOLE);
+    printf(ANSI_CURSOR_POSITION, 1, 1);
+    puts(ANSI_CURSOR_SHOW);
+
+    return ret;
+}
+
+static efi_status_t efi_bootmenu_volume_selected(void *data, bool *exit)
+{
+    struct efi_bootmenu_volume_entry_data *info = data;
+
+    *exit = true;
+
+    if (info) {
+        info->bo->current_volume = info->v;
+        info->bo->dp_volume = info->dp;
+    }
+
+    return EFI_SUCCESS;
+}
+
+static efi_status_t efi_bootmenu_file_selected(void *data, bool *exit)
+{
+    struct efi_bootmenu_file_entry_data *info = data;
+
+    *exit = true;
+
+    if (!info)
+        return EFI_INVALID_PARAMETER;
+
+    if (u16_strncmp(info->file_name, u".", 1) == 0 &&
+        u16_strlen(info->file_name) == 1) {
+        /* stay current path */
+    } else if (u16_strncmp(info->file_name, u"..", 2) == 0 &&
+           u16_strlen(info->file_name) == 2) {

u16_strcmp(info->file_name, u"..") will yield the same result with less effort.

+        u32 i;
+        int len = u16_strlen(info->bo->current_path);
+
+        for (i = len - 2; i > 0; i--) {
+            if (info->bo->current_path[i] == u'\\')

"a\b.efi" is a valid file name on ext4. How do we handle it?
Do we ensure that it is not selected?
Or would we just ignore this border case and accept unexpected behavior?

+                break;
+        }
+
+        if (i == 0)
+            info->bo->current_path[0] = u'\0';
+        else
+            info->bo->current_path[i + 1] = u'\0';
+    } else {
+        size_t new_len;
+
+        new_len = u16_strlen(info->bo->current_path) +
+                     u16_strlen(info->file_name) + 1;
+        if (new_len > EFI_BOOTMENU_FILE_PATH_MAX) {

%s/>/>=/ and save the + 1 above.

+            /* TODO: show error notification to user */
+            log_err("file path is too long\n");
+            return EFI_INVALID_PARAMETER;
+        }
+        u16_strlcat(info->bo->current_path, info->file_name,
+                EFI_BOOTMENU_FILE_PATH_MAX);
+        if (info->is_directory) {
+            /*
+             * Remainig buffer should have enough space to contain u"\\" and
+             * at least one character for file name
+             */
+            if (new_len + 2 > EFI_BOOTMENU_FILE_PATH_MAX) {

%s/>/>=/

Best regards

Heinrich

+                log_err("directory path is too long\n");
+                return EFI_INVALID_PARAMETER;
+            }
+            u16_strlcat(info->bo->current_path, u"\\",
+                    EFI_BOOTMENU_FILE_PATH_MAX);
+        } else {
+            info->bo->file_selected = true;
+        }
+    }
+    return EFI_SUCCESS;
+}
+
+static efi_status_t efi_bootmenu_select_volume(struct efi_bootmenu_boot_option *bo)
+{
+    u32 i;
+    efi_status_t ret;
+    efi_uintn_t count;
+    struct efi_handler *handler;
+    struct efi_device_path *device_path;
+    efi_handle_t *volume_handles = NULL;
+    struct efi_simple_file_system_protocol *v;
+    struct efi_bootmenu_item *menu_item, *iter;
+
+    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)
+        return ret;
+
+    menu_item = calloc(count + 1, sizeof(struct efi_bootmenu_item));
+    if (!menu_item) {
+        ret = EFI_OUT_OF_RESOURCES;
+        goto out1;
+    }
+
+    iter = menu_item;
+    for (i = 0; i < count; i++) {
+        u16 *dev_name, *p;
+        struct efi_block_io *block_io;
+        char buf[BOOTMENU_DEVICE_NAME_MAX];
+        struct efi_bootmenu_volume_entry_data *info;
+
+        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 efi_bootmenu_volume_entry_data));
+        if (!info) {
+            ret = EFI_OUT_OF_RESOURCES;
+            goto out2;
+        }
+
+        efi_disk_get_device_name(block_io, buf, BOOTMENU_DEVICE_NAME_MAX);
+        dev_name = calloc(1, (strlen(buf) + 1) * sizeof(u16));
+        if (!dev_name) {
+            free(info);
+            ret = EFI_OUT_OF_RESOURCES;
+            goto out2;
+        }
+        p = dev_name;
+        utf8_utf16_strncpy(&p, buf, strlen(buf));
+
+        info->v = v;
+        info->dp = device_path;
+        info->bo = bo;
+        iter->title = dev_name;
+        iter->func = efi_bootmenu_volume_selected;
+        iter->data = info;
+        iter++;
+    }
+
+    iter->title = u16_strdup(u"Quit");
+    iter->func = NULL;
+    iter->data = NULL;
+    count += 1;
+
+    ret = efi_bootmenu_process_common(menu_item, count, -1);
+
+out2:
+    iter = menu_item;
+    for (i = 0; i < count; i++) {
+        struct efi_bootmenu_volume_entry_data *p;
+
+        p = (struct efi_bootmenu_volume_entry_data *)(iter->data);
+        free(iter->title);
+        free(p);
+        iter++;
+    }
+
+    free(menu_item);
+
+out1:
+    efi_free_pool(volume_handles);
+
+    return ret;
+}
+
+static efi_status_t efi_bootmenu_select_file(struct efi_bootmenu_boot_option *bo,
+                         struct efi_file_handle *root)
+{
+    u32 i;
+    struct efi_file_info *buf;
+    u32 count = 0;
+    efi_uintn_t len;
+    efi_status_t ret;
+    struct efi_file_handle *f;
+    struct efi_bootmenu_item *menu_item, *iter;
+
+    buf = calloc(1, sizeof(struct efi_file_info) + EFI_BOOTMENU_FILE_PATH_BUF_SIZE);
+    if (!buf)
+        return EFI_OUT_OF_RESOURCES;
+
+    while (!bo->file_selected) {
+        count = 0;
+
+        ret = efi_file_open_int(root, &f, bo->current_path, EFI_FILE_MODE_READ, 0);
+        if (ret != EFI_SUCCESS)
+            return ret;
+
+        /* calculate directory information total count */
+        for (;;) {
+            len = sizeof(struct efi_file_info) + EFI_BOOTMENU_FILE_PATH_BUF_SIZE;
+            ret = efi_file_read_int(f, &len, buf);
+            if (ret != EFI_SUCCESS || len == 0)
+                break;
+
+            count++;
+        }
+
+        menu_item = calloc(count + 1, sizeof(struct efi_bootmenu_item));
+        if (!menu_item) {
+            efi_file_close_int(f);
+            ret = EFI_OUT_OF_RESOURCES;
+            goto out;
+        }
+
+        /* read directory and construct menu structure */
+        efi_file_setpos_int(f, 0);
+        iter = menu_item;
+        for (i = 0; i < count; i++) {
+            u16 *name;
+            int name_len;
+            struct efi_bootmenu_file_entry_data *info;
+
+            len = sizeof(struct efi_file_info) + EFI_BOOTMENU_FILE_PATH_BUF_SIZE;
+            ret = efi_file_read_int(f, &len, buf);
+            if (ret != EFI_SUCCESS || len == 0)
+                goto err;
+
+            info = calloc(1, sizeof(struct efi_bootmenu_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 = u16_strsize(buf->file_name) + sizeof(u16);
+                name = calloc(1, name_len);
+                if (!name) {
+                    ret = EFI_OUT_OF_RESOURCES;
+                    goto err;
+                }
+                u16_strcpy(name, buf->file_name);
+                name[u16_strlen(buf->file_name)] = u'/';
+
+                info->is_directory = true;
+            } else {
+                name_len = u16_strsize(buf->file_name);
+                name = calloc(1, name_len);
+                if (!name) {
+                    ret = EFI_OUT_OF_RESOURCES;
+                    goto err;
+                }
+                u16_strcpy(name, buf->file_name);
+            }
+
+            info->file_name = u16_strdup(buf->file_name);
+            info->bo = bo;
+            iter->title = name;
+            iter->func = efi_bootmenu_file_selected;
+            iter->data = info;
+            iter++;
+        }
+
+        /* add "Quit" entry */
+        iter->title = u"Quit";
+        iter->func = NULL;
+        iter->data = NULL;
+        count += 1;
+
+        ret = efi_bootmenu_process_common(menu_item, count, -1);
+err:
+        efi_file_close_int(f);
+        iter = menu_item;
+        for (i = 0; i < count - 1; i++, iter++) {
+            free(((struct efi_bootmenu_file_entry_data *)(iter->data))->file_name);
+            free(iter->title);
+            free(iter->data);
+        }
+
+        free(menu_item);
+
+        if (ret != EFI_SUCCESS)
+            break;
+    }
+
+out:
+    free(buf);
+    return ret;
+}
+
+static efi_status_t efi_bootmenu_boot_add_enter_name(struct efi_bootmenu_boot_option *bo)
+{
+    efi_status_t ret;
+
+    printf(ANSI_CURSOR_POSITION, 2, 1);
+    puts("  *** U-Boot EFI Boot Manager Menu ***");
+    printf(ANSI_CURSOR_POSITION, 4, 1);
+    puts("  enter name:");
+
+    printf(ANSI_CURSOR_POSITION, 8, 1);
+    puts("  ENTER to complete, ESC/CTRL+C to quit");
+
+    ret = efi_console_get_u16_string(cin, cout, bo->boot_name,
+                     EFI_BOOTMENU_BOOT_NAME_MAX, NULL, 4, 15);
+
+    return ret;
+}
+
+static efi_status_t efi_bootmenu_select_file_handler(struct efi_bootmenu_boot_option *bo)
+{
+    efi_status_t ret;
+    struct efi_file_handle *root;
+
+    bo->file_selected = false;
+
+    while (!bo->file_selected) {
+        bo->current_volume = NULL;
+        memset(bo->current_path, 0, sizeof(bo->current_path));
+
+        ret = efi_bootmenu_select_volume(bo);
+        if (ret != EFI_SUCCESS)
+            return ret;
+
+        if (!bo->current_volume)
+            return EFI_INVALID_PARAMETER;
+
+        ret = efi_open_volume_int(bo->current_volume, &root);
+        if (ret != EFI_SUCCESS)
+            return ret;
+
+        ret = efi_bootmenu_select_file(bo, root);
+        if (ret != EFI_SUCCESS)
+            return ret;
+    }
+
+    ret = efi_bootmenu_boot_add_enter_name(bo);
+
+    return ret;
+}
+
+efi_status_t efi_bootmenu_get_unused_bootoption(u16 *buf,
+                        efi_uintn_t buf_size, u32 *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;
+}
+
+static efi_status_t efi_bootmenu_set_boot_option(u16 *var_name, struct efi_device_path *dp,
+                         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 = efi_dp_size(dp) + sizeof(END);
+    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(var_name, &efi_global_variable_guid,
+                   EFI_VARIABLE_NON_VOLATILE |
+                   EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                   EFI_VARIABLE_RUNTIME_ACCESS,
+                   size, p, false);
+    free(p);
+
+    return ret;
+}
+
+efi_status_t efi_bootmenu_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;
+}
+
+static efi_status_t efi_bootmenu_process_add_boot_option(void *data, bool *exit)
+{
+    u32 index;
+    u16 var_name[9];
+    char *buf = NULL;
+    efi_status_t ret;
+    char *iter = NULL;
+    efi_uintn_t dp_size, fp_size;
+    struct efi_bootmenu_boot_option bo;
+    struct efi_device_path_file_path *fp;
+
+    ret = efi_bootmenu_get_unused_bootoption(var_name, sizeof(var_name),
+                         &index);
+    if (ret != EFI_SUCCESS)
+        return ret;
+
+    bo.current_path = calloc(1, EFI_BOOTMENU_FILE_PATH_BUF_SIZE);
+    if (!bo.current_path)
+        goto out;
+
+    bo.boot_name = calloc(1, EFI_BOOTMENU_BOOT_NAME_MAX * sizeof(u16));
+    if (!bo.boot_name)
+        goto out;
+
+    ret = efi_bootmenu_select_file_handler(&bo);
+    if (ret != EFI_SUCCESS)
+        goto out;
+
+    dp_size = efi_dp_size(bo.dp_volume);
+    fp_size = sizeof(struct efi_device_path) +
+          ((u16_strlen(bo.current_path) + 1) * sizeof(u16));
+    buf = calloc(1, dp_size + fp_size + sizeof(END));
+    if (!buf)
+        goto out;
+
+    iter = buf;
+    memcpy(iter, bo.dp_volume, dp_size);
+    iter += dp_size;
+
+    fp = (struct efi_device_path_file_path *)iter;
+    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, bo.current_path);
+    iter += fp_size;
+    *((struct efi_device_path *)iter) = END;
+
+    ret = efi_bootmenu_set_boot_option(var_name, (struct efi_device_path *)buf,
+                       bo.boot_name, NULL);
+    if (ret != EFI_SUCCESS)
+        goto out;
+
+    efi_bootmenu_append_bootorder((u16)index);
+    if (ret != EFI_SUCCESS)
+        goto out;
+
+out:
+    free(buf);
+    free(bo.boot_name);
+    free(bo.current_path);
+
+    return ret;
+}
+
+static efi_status_t efi_bootmenu_init(void)
+{
+    efi_status_t ret;
+    struct efi_handler *handler;
+
+    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;
+
+    ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
+    if (ret != EFI_SUCCESS)
+        return ret;
+
+    ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
+                EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+    if (ret != EFI_SUCCESS)
+        return ret;
+
+    return ret;
+}
+
+static const struct efi_bootmenu_item maintenance_menu_items[] = {
+    {u"Add Boot Option", efi_bootmenu_process_add_boot_option},
+    {u"Quit", NULL},
+};
+
+efi_status_t efi_bootmenu_show_maintenance_menu(void)
+{
+    efi_status_t ret;
+
+    ret = efi_bootmenu_init();
+    if (ret != EFI_SUCCESS)
+        return ret;
+
+    return efi_bootmenu_process_common(maintenance_menu_items,
+                      ARRAY_SIZE(maintenance_menu_items),
+                      -1);
+}
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 ba68a15017..f5002e1c99 100644
--- a/lib/efi_loader/efi_console.c
+++ b/lib/efi_loader/efi_console.c
@@ -5,6 +5,7 @@
   *  Copyright (c) 2016 Alexander Graf
   */

+#include <ansi.h>
  #include <common.h>
  #include <charset.h>
  #include <malloc.h>
@@ -1312,3 +1313,83 @@ 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
+ * @cout:        protocol interface to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
+ * @buf:        buffer to store user input string in UTF16
+ * @size:        buffer size including NULL terminator
+ * @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,
+                    struct efi_simple_text_output_protocol *cout,
+                    u16 *buf, efi_uintn_t size,
+                    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, row, col);
+    puts(ANSI_CLEAR_LINE_TO_END);
+    puts(ANSI_CURSOR_SHOW);
+
+    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, row, col);
+            ret = EFI_CALL(cout->output_string(cout, buf));
+            if (ret != EFI_SUCCESS)
+                return ret;
+
+            puts(ANSI_CLEAR_LINE_TO_END);
+            continue;
+        } else if (key.unicode_char == u'\r') {
+            if (len == 0) /* no user input */
+                continue;
+
+            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 >= (size - 1))
+            continue;
+
+        buf[len] = key.unicode_char;
+        len++;
+        printf(ANSI_CURSOR_POSITION, row, col);
+        ret = EFI_CALL(cout->output_string(cout, buf));
+        if (ret != EFI_SUCCESS)
+            return ret;
+    }
+}
diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index 8fb5b2363c..58736a8a5b 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -750,3 +750,14 @@ efi_status_t efi_disk_init(void)

      return EFI_SUCCESS;
  }
+
+efi_status_t efi_disk_get_device_name(struct efi_block_io *this, char *buf, int size)
+{
+    struct efi_disk_obj *diskobj;
+
+    diskobj = container_of(this, struct efi_disk_obj, ops);
+
+    snprintf(buf, size, "%s%d:%d", diskobj->ifname, diskobj->dev_index, diskobj->part);

A space would improve readability and better match U-Boot syntax.
%s/%s%d:%d/%s %d:%d/

I guess for MMC we are only supporting booting form the user partition.
Otherwise the information would be incomplete.

Best regards

Heinrich

+
+    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 *



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