| Message ID | 20190222081014.2117-4-takahiro.akashi@linaro.org |
|---|---|
| State | Changes Requested |
| Delegated to: | Heinrich Schuchardt |
| Headers | show |
| Series | cmd: add efidebug for efi environment | expand |
On 2/22/19 9:10 AM, AKASHI Takahiro wrote: > Currently, there is no easy way to add or modify UEFI variables. > In particular, bootmgr supports BootOrder/BootXXXX variables, it is > quite hard to define them as u-boot variables because they are represented > in a complicated and encoded format. > > The new command, efidebug, helps address these issues and give us > more friendly interfaces: > * efidebug boot add: add BootXXXX variable > * efidebug boot rm: remove BootXXXX variable > * efidebug boot dump: display all BootXXXX variables > * efidebug boot next: set BootNext variable > * efidebug boot order: set/display a boot order (BootOrder) > > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> => efidebug boot add 00AA iPXE scsi 0:1 snp-arm32.efi --foo => efidebug boot dump Boot00AA: attributes: A-- (0x00000001) label: iPXE file_path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(0,0)/HD(1,MBR,0xa88c6020,0x1,0x800)/\snp-arm32.efi data: --foo I would not have expected a backslash here. => efidebug boot add 00AA iPXE scsi 0:1 /snp-arm32.efi --foo => bootefi bootmgr $fdtcontroladdr => efidebug boot dump Boot00AA: attributes: A-- (0x00000001) label: iPXE file_path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(0,0)/HD(1,MBR,0xa88c6020,0x1,0x800)/\\snp-arm32.efi data: --foo I would not have expected a double backslash. This extra backslash is introduced by efi_dp_from_name(): if (!is_net) { /* Add leading / to fs paths, because they're absolute */ snprintf(filename, sizeof(filename), "/%s", path); } else { snprintf(filename, sizeof(filename), "%s", path); } I will send a separate patch. Best regards Heinrich
On 2/22/19 9:10 AM, AKASHI Takahiro wrote: > Currently, there is no easy way to add or modify UEFI variables. > In particular, bootmgr supports BootOrder/BootXXXX variables, it is > quite hard to define them as u-boot variables because they are represented > in a complicated and encoded format. > > The new command, efidebug, helps address these issues and give us > more friendly interfaces: > * efidebug boot add: add BootXXXX variable > * efidebug boot rm: remove BootXXXX variable > * efidebug boot dump: display all BootXXXX variables > * efidebug boot next: set BootNext variable > * efidebug boot order: set/display a boot order (BootOrder) > > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Unfortunately you are still calling functions without EFI_CALL() that need it. See below. > --- > MAINTAINERS | 1 + > cmd/Kconfig | 10 + > cmd/Makefile | 1 + > cmd/efidebug.c | 578 +++++++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 590 insertions(+) > create mode 100644 cmd/efidebug.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 0cce9db2660e..4fabb75eda37 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -471,6 +471,7 @@ F: lib/efi*/ > F: test/py/tests/test_efi* > F: test/unicode_ut.c > F: cmd/bootefi.c > +F: cmd/efidebug.c > F: cmd/nvedit_efi.c > F: tools/file2include.c > > diff --git a/cmd/Kconfig b/cmd/Kconfig > index ddcdee44538d..88b086b074be 100644 > --- a/cmd/Kconfig > +++ b/cmd/Kconfig > @@ -1407,6 +1407,16 @@ config CMD_DISPLAY > displayed on a simple board-specific display. Implement > display_putc() to use it. > > +config CMD_EFIDEBUG > + bool "efidebug - display/configure UEFI environment" > + depends on EFI_LOADER > + default n > + help > + Enable the 'efidebug' command which provides a subset of UEFI > + shell utility with simplified functionality. It will be useful > + particularly for managing boot parameters as well as examining > + various EFI status for debugging. > + > config CMD_LED > bool "led" > default y if LED > diff --git a/cmd/Makefile b/cmd/Makefile > index b9ee51869d48..acb85f49fba8 100644 > --- a/cmd/Makefile > +++ b/cmd/Makefile > @@ -51,6 +51,7 @@ obj-$(CONFIG_CMD_ECHO) += echo.o > obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o > obj-$(CONFIG_CMD_EEPROM) += eeprom.o > obj-$(CONFIG_EFI_STUB) += efi.o > +obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o > obj-$(CONFIG_CMD_ELF) += elf.o > obj-$(CONFIG_HUSH_PARSER) += exit.o > obj-$(CONFIG_CMD_EXT4) += ext4.o > diff --git a/cmd/efidebug.c b/cmd/efidebug.c > new file mode 100644 > index 000000000000..ef3a66e393f0 > --- /dev/null > +++ b/cmd/efidebug.c > @@ -0,0 +1,578 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * UEFI Shell-like command > + * > + * Copyright (c) 2018 AKASHI Takahiro, Linaro Limited > + */ > + > +#include <charset.h> > +#include <common.h> > +#include <command.h> > +#include <efi_loader.h> > +#include <environment.h> > +#include <exports.h> > +#include <malloc.h> > +#include <search.h> > +#include <linux/ctype.h> > + > +/** > + * do_efi_boot_add() - set UEFI load option > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, > + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot add" sub-command. > + * Create or change UEFI load option. > + * - boot add <id> <label> <interface> <devnum>[:<part>] <file> <options> > + */ > +static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + int id; > + char *endp; > + char var_name[9]; > + u16 var_name16[9], *p; > + efi_guid_t guid; > + size_t label_len, label_len16; > + u16 *label; > + struct efi_device_path *device_path = NULL, *file_path = NULL; > + struct efi_load_option lo; > + void *data = NULL; > + efi_uintn_t size; > + int ret; > + > + if (argc < 6 || argc > 7) > + return CMD_RET_USAGE; > + > + id = (int)simple_strtoul(argv[1], &endp, 16); > + if (*endp != '\0' || id > 0xffff) > + return CMD_RET_FAILURE; > + > + sprintf(var_name, "Boot%04X", id); > + p = var_name16; > + utf8_utf16_strncpy(&p, var_name, 9); > + > + guid = efi_global_variable_guid; > + > + /* attributes */ > + lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */ > + > + /* label */ > + label_len = strlen(argv[2]); > + label_len16 = utf8_utf16_strnlen(argv[2], label_len); > + label = malloc((label_len16 + 1) * sizeof(u16)); > + if (!label) > + return CMD_RET_FAILURE; > + lo.label = label; /* label will be changed below */ > + utf8_utf16_strncpy(&label, argv[2], label_len); > + > + /* file path */ > + ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path, > + &file_path); > + if (ret != EFI_SUCCESS) { > + printf("Cannot create device path for \"%s %s\"\n", > + argv[3], argv[4]); > + ret = CMD_RET_FAILURE; > + goto out; > + } > + lo.file_path = file_path; > + lo.file_path_length = efi_dp_size(file_path) > + + sizeof(struct efi_device_path); /* for END */ > + > + /* optional data */ > + lo.optional_data = (u8 *)(argc == 6 ? "" : argv[6]); > + > + size = efi_serialize_load_option(&lo, (u8 **)&data); > + if (!size) { > + ret = CMD_RET_FAILURE; > + goto out; > + } > + > + ret = efi_set_variable(var_name16, &guid, EFI_CALL() > + EFI_VARIABLE_BOOTSERVICE_ACCESS | > + EFI_VARIABLE_RUNTIME_ACCESS, size, data); > + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); > +out: > + free(data); > + efi_free_pool(device_path); > + efi_free_pool(file_path); > + free(lo.label); > + > + return ret; > +} > + > +/** > + * do_efi_boot_rm() - delete UEFI load options > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot rm" sub-command. > + * Delete UEFI load options. > + * - boot rm <id> ... > + */ > +static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + efi_guid_t guid; > + int id, i; > + char *endp; > + char var_name[9]; > + u16 var_name16[9]; > + efi_status_t ret; > + > + if (argc == 1) > + return CMD_RET_USAGE; > + > + guid = efi_global_variable_guid; > + for (i = 1; i < argc; i++, argv++) { > + id = (int)simple_strtoul(argv[1], &endp, 16); > + if (*endp != '\0' || id > 0xffff) > + return CMD_RET_FAILURE; > + > + sprintf(var_name, "Boot%04X", id); > + utf8_utf16_strncpy((u16 **)&var_name16, var_name, 9); > + > + ret = efi_set_variable(var_name16, &guid, 0, 0, NULL); EFI_CALL() > + if (ret) { > + printf("cannot remove Boot%04X", id); > + return CMD_RET_FAILURE; > + } > + } > + > + return CMD_RET_SUCCESS; > +} > + > +/** > + * show_efi_boot_opt_data() - dump UEFI load option > + * > + * @id: Load option number > + * @data: Value of UEFI load option variable > + * > + * Decode the value of UEFI load option variable and print information. > + */ > +static void show_efi_boot_opt_data(int id, void *data) > +{ > + struct efi_load_option lo; > + char *label, *p; > + size_t label_len16, label_len; > + u16 *dp_str; > + > + efi_deserialize_load_option(&lo, data); > + > + label_len16 = u16_strlen(lo.label); > + label_len = utf16_utf8_strnlen(lo.label, label_len16); > + label = malloc(label_len + 1); > + if (!label) > + return; > + p = label; > + utf16_utf8_strncpy(&p, lo.label, label_len16); > + > + printf("Boot%04X:\n", id); > + printf("\tattributes: %c%c%c (0x%08x)\n", > + /* ACTIVE */ > + lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-', > + /* FORCE RECONNECT */ > + lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-', > + /* HIDDEN */ > + lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-', > + lo.attributes); > + printf("\tlabel: %s\n", label); > + > + dp_str = efi_dp_str(lo.file_path); > + printf("\tfile_path: %ls\n", dp_str); > + efi_free_pool(dp_str); > + > + printf("\tdata: %s\n", lo.optional_data); > + > + free(label); > +} > + > +/** > + * show_efi_boot_opt() - dump UEFI load option > + * > + * @id: Load option number > + * > + * Dump information defined by UEFI load option. > + */ > +static void show_efi_boot_opt(int id) > +{ > + char var_name[9]; > + u16 var_name16[9], *p; > + efi_guid_t guid; > + void *data = NULL; > + efi_uintn_t size; > + int ret; > + > + sprintf(var_name, "Boot%04X", id); > + p = var_name16; > + utf8_utf16_strncpy(&p, var_name, 9); > + guid = efi_global_variable_guid; > + > + size = 0; > + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL); EFI_CALL() missing. > + if (ret == (int)EFI_BUFFER_TOO_SMALL) { > + data = malloc(size); > + ret = efi_get_variable(var_name16, &guid, NULL, &size, data); same here > + } > + if (ret == EFI_SUCCESS) > + show_efi_boot_opt_data(id, data); > + else if (ret == EFI_NOT_FOUND) > + printf("Boot%04X: not found\n", id); > + > + free(data); > +} > + > +/** > + * show_efi_boot_dump() - dump all UEFI load options > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot dump" sub-command. > + * Dump information of all UEFI load options defined. > + * - boot dump > + */ > +static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + char regex[256]; > + char * const regexlist[] = {regex}; > + char *variables = NULL, *boot, *value; > + int len; > + int id; > + > + if (argc > 1) > + return CMD_RET_USAGE; > + > + snprintf(regex, 256, "efi_.*-.*-.*-.*-.*_Boot[0-9A-F]+"); > + > + /* TODO: use GetNextVariableName? */ > + len = hexport_r(&env_htab, '\n', H_MATCH_REGEX | H_MATCH_KEY, > + &variables, 0, 1, regexlist); > + > + if (!len) > + return CMD_RET_SUCCESS; > + > + if (len < 0) > + return CMD_RET_FAILURE; > + > + boot = variables; > + while (*boot) { > + value = strstr(boot, "Boot") + 4; > + id = (int)simple_strtoul(value, NULL, 16); > + show_efi_boot_opt(id); > + boot = strchr(boot, '\n'); > + if (!*boot) > + break; > + boot++; > + } > + free(variables); > + > + return CMD_RET_SUCCESS; > +} > + > +/** > + * show_efi_boot_order() - show order of UEFI load options > + * > + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure > + * > + * Show order of UEFI load options defined by BootOrder variable. > + */ > +static int show_efi_boot_order(void) > +{ > + efi_guid_t guid; > + u16 *bootorder = NULL; > + efi_uintn_t size; > + int num, i; > + char var_name[9]; > + u16 var_name16[9], *p16; > + void *data; > + struct efi_load_option lo; > + char *label, *p; > + size_t label_len16, label_len; > + efi_status_t ret; > + > + guid = efi_global_variable_guid; > + size = 0; > + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size, NULL); EFI_CALL() > + if (ret == EFI_BUFFER_TOO_SMALL) { > + bootorder = malloc(size); > + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size, > + bootorder); EFI_CALL() > + } > + if (ret == EFI_NOT_FOUND) { > + printf("BootOrder not defined\n"); > + ret = CMD_RET_SUCCESS; > + goto out; > + } else if (ret != EFI_SUCCESS) { > + ret = CMD_RET_FAILURE; > + goto out; > + } > + > + num = size / sizeof(u16); > + for (i = 0; i < num; i++) { > + sprintf(var_name, "Boot%04X", bootorder[i]); > + p16 = var_name16; > + utf8_utf16_strncpy(&p16, var_name, 9); > + > + size = 0; > + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL); EFI_CALL() > + if (ret != EFI_BUFFER_TOO_SMALL) { > + printf("%2d: Boot%04X: (not defined)\n", > + i + 1, bootorder[i]); > + continue; > + } > + > + data = malloc(size); > + if (!data) { > + ret = CMD_RET_FAILURE; > + goto out; > + } > + ret = efi_get_variable(var_name16, &guid, NULL, &size, data); EFI_CALL() > + if (ret != EFI_SUCCESS) { > + free(data); > + ret = CMD_RET_FAILURE; > + goto out; > + } > + > + efi_deserialize_load_option(&lo, data); > + > + label_len16 = u16_strlen(lo.label); > + label_len = utf16_utf8_strnlen(lo.label, label_len16); > + label = malloc(label_len + 1); > + if (!label) { > + free(data); > + ret = CMD_RET_FAILURE; > + goto out; > + } > + p = label; > + utf16_utf8_strncpy(&p, lo.label, label_len16); > + printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label); > + free(label); > + > + free(data); > + } > +out: > + free(bootorder); > + > + return ret; > +} > + > +/** > + * do_efi_boot_next() - manage UEFI BootNext variable > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, > + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot next" sub-command. > + * Set BootNext variable. > + * - boot next <id> > + */ > +static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + u16 bootnext; > + efi_uintn_t size; > + char *endp; > + efi_guid_t guid; > + efi_status_t ret; > + > + if (argc != 2) > + return CMD_RET_USAGE; > + > + bootnext = (u16)simple_strtoul(argv[1], &endp, 16); > + if (*endp != '\0' || bootnext > 0xffff) { > + printf("invalid value: %s\n", argv[1]); > + ret = CMD_RET_FAILURE; > + goto out; > + } > + > + guid = efi_global_variable_guid; > + size = sizeof(u16); > + ret = efi_set_variable(L"BootNext", &guid, EFI_CALL() > + EFI_VARIABLE_BOOTSERVICE_ACCESS | > + EFI_VARIABLE_RUNTIME_ACCESS, size, &bootnext); > + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); > +out: > + return ret; > +} > + > +/** > + * do_efi_boot_order() - manage UEFI BootOrder variable > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot order" sub-command. > + * Show order of UEFI load options, or change it in BootOrder variable. > + * - boot order [<id> ...] > + */ > +static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + u16 *bootorder = NULL; > + efi_uintn_t size; > + int id, i; > + char *endp; > + efi_guid_t guid; > + efi_status_t ret; > + > + if (argc == 1) > + return show_efi_boot_order(); > + > + argc--; > + argv++; > + > + size = argc * sizeof(u16); > + bootorder = malloc(size); > + if (!bootorder) > + return CMD_RET_FAILURE; > + > + for (i = 0; i < argc; i++) { > + id = (int)simple_strtoul(argv[i], &endp, 16); > + if (*endp != '\0' || id > 0xffff) { > + printf("invalid value: %s\n", argv[i]); > + ret = CMD_RET_FAILURE; > + goto out; > + } > + > + bootorder[i] = (u16)id; > + } > + > + guid = efi_global_variable_guid; > + ret = efi_set_variable(L"BootOrder", &guid, EFI_CALL() Best regards Heinrich > + EFI_VARIABLE_BOOTSERVICE_ACCESS | > + EFI_VARIABLE_RUNTIME_ACCESS, size, bootorder); > + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); > +out: > + free(bootorder); > + > + return ret; > +} > + > +static cmd_tbl_t cmd_efidebug_boot_sub[] = { > + U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""), > + U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""), > + U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""), > + U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""), > + U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order, > + "", ""), > +}; > + > +/** > + * do_efi_boot_opt() - manage UEFI load options > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, > + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug "boot" sub-command. > + * See above for details of sub-commands. > + */ > +static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + cmd_tbl_t *cp; > + > + if (argc < 2) > + return CMD_RET_USAGE; > + > + argc--; argv++; > + > + cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub, > + ARRAY_SIZE(cmd_efidebug_boot_sub)); > + if (!cp) > + return CMD_RET_USAGE; > + > + return cp->cmd(cmdtp, flag, argc, argv); > +} > + > +static cmd_tbl_t cmd_efidebug_sub[] = { > + U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""), > +}; > + > +/** > + * do_efidebug() - display and configure UEFI environment > + * > + * @cmdtp: Command table > + * @flag: Command flag > + * @argc: Number of arguments > + * @argv: Argument array > + * Return: CMD_RET_SUCCESS on success, > + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure > + * > + * Implement efidebug command which allows us to display and > + * configure UEFI environment. > + * See above for details of sub-commands. > + */ > +static int do_efidebug(cmd_tbl_t *cmdtp, int flag, > + int argc, char * const argv[]) > +{ > + cmd_tbl_t *cp; > + efi_status_t r; > + > + if (argc < 2) > + return CMD_RET_USAGE; > + > + argc--; argv++; > + > + /* Initialize UEFI drivers */ > + r = efi_init_obj_list(); > + if (r != EFI_SUCCESS) { > + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", > + r & ~EFI_ERROR_MASK); > + return CMD_RET_FAILURE; > + } > + > + cp = find_cmd_tbl(argv[0], cmd_efidebug_sub, > + ARRAY_SIZE(cmd_efidebug_sub)); > + if (!cp) > + return CMD_RET_USAGE; > + > + return cp->cmd(cmdtp, flag, argc, argv); > +} > + > +#ifdef CONFIG_SYS_LONGHELP > +static char efidebug_help_text[] = > + " - UEFI Shell-like interface to configure UEFI environment\n" > + "\n" > + "efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n" > + " - set UEFI BootXXXX variable\n" > + " <load options> will be passed to UEFI application\n" > + "efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n" > + " - delete UEFI BootXXXX variables\n" > + "efidebug boot dump\n" > + " - dump all UEFI BootXXXX variables\n" > + "efidebug boot next <bootid>\n" > + " - set UEFI BootNext variable\n" > + "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n" > + " - set/show UEFI boot order\n" > + "\n"; > +#endif > + > +U_BOOT_CMD( > + efidebug, 10, 0, do_efidebug, > + "Configure UEFI environment", > + efidebug_help_text > +); >
diff --git a/MAINTAINERS b/MAINTAINERS index 0cce9db2660e..4fabb75eda37 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -471,6 +471,7 @@ F: lib/efi*/ F: test/py/tests/test_efi* F: test/unicode_ut.c F: cmd/bootefi.c +F: cmd/efidebug.c F: cmd/nvedit_efi.c F: tools/file2include.c diff --git a/cmd/Kconfig b/cmd/Kconfig index ddcdee44538d..88b086b074be 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1407,6 +1407,16 @@ config CMD_DISPLAY displayed on a simple board-specific display. Implement display_putc() to use it. +config CMD_EFIDEBUG + bool "efidebug - display/configure UEFI environment" + depends on EFI_LOADER + default n + help + Enable the 'efidebug' command which provides a subset of UEFI + shell utility with simplified functionality. It will be useful + particularly for managing boot parameters as well as examining + various EFI status for debugging. + config CMD_LED bool "led" default y if LED diff --git a/cmd/Makefile b/cmd/Makefile index b9ee51869d48..acb85f49fba8 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_CMD_ECHO) += echo.o obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o obj-$(CONFIG_CMD_EEPROM) += eeprom.o obj-$(CONFIG_EFI_STUB) += efi.o +obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o obj-$(CONFIG_CMD_ELF) += elf.o obj-$(CONFIG_HUSH_PARSER) += exit.o obj-$(CONFIG_CMD_EXT4) += ext4.o diff --git a/cmd/efidebug.c b/cmd/efidebug.c new file mode 100644 index 000000000000..ef3a66e393f0 --- /dev/null +++ b/cmd/efidebug.c @@ -0,0 +1,578 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * UEFI Shell-like command + * + * Copyright (c) 2018 AKASHI Takahiro, Linaro Limited + */ + +#include <charset.h> +#include <common.h> +#include <command.h> +#include <efi_loader.h> +#include <environment.h> +#include <exports.h> +#include <malloc.h> +#include <search.h> +#include <linux/ctype.h> + +/** + * do_efi_boot_add() - set UEFI load option + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot add" sub-command. + * Create or change UEFI load option. + * - boot add <id> <label> <interface> <devnum>[:<part>] <file> <options> + */ +static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + int id; + char *endp; + char var_name[9]; + u16 var_name16[9], *p; + efi_guid_t guid; + size_t label_len, label_len16; + u16 *label; + struct efi_device_path *device_path = NULL, *file_path = NULL; + struct efi_load_option lo; + void *data = NULL; + efi_uintn_t size; + int ret; + + if (argc < 6 || argc > 7) + return CMD_RET_USAGE; + + id = (int)simple_strtoul(argv[1], &endp, 16); + if (*endp != '\0' || id > 0xffff) + return CMD_RET_FAILURE; + + sprintf(var_name, "Boot%04X", id); + p = var_name16; + utf8_utf16_strncpy(&p, var_name, 9); + + guid = efi_global_variable_guid; + + /* attributes */ + lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */ + + /* label */ + label_len = strlen(argv[2]); + label_len16 = utf8_utf16_strnlen(argv[2], label_len); + label = malloc((label_len16 + 1) * sizeof(u16)); + if (!label) + return CMD_RET_FAILURE; + lo.label = label; /* label will be changed below */ + utf8_utf16_strncpy(&label, argv[2], label_len); + + /* file path */ + ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path, + &file_path); + if (ret != EFI_SUCCESS) { + printf("Cannot create device path for \"%s %s\"\n", + argv[3], argv[4]); + ret = CMD_RET_FAILURE; + goto out; + } + lo.file_path = file_path; + lo.file_path_length = efi_dp_size(file_path) + + sizeof(struct efi_device_path); /* for END */ + + /* optional data */ + lo.optional_data = (u8 *)(argc == 6 ? "" : argv[6]); + + size = efi_serialize_load_option(&lo, (u8 **)&data); + if (!size) { + ret = CMD_RET_FAILURE; + goto out; + } + + ret = efi_set_variable(var_name16, &guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS, size, data); + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); +out: + free(data); + efi_free_pool(device_path); + efi_free_pool(file_path); + free(lo.label); + + return ret; +} + +/** + * do_efi_boot_rm() - delete UEFI load options + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot rm" sub-command. + * Delete UEFI load options. + * - boot rm <id> ... + */ +static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + efi_guid_t guid; + int id, i; + char *endp; + char var_name[9]; + u16 var_name16[9]; + efi_status_t ret; + + if (argc == 1) + return CMD_RET_USAGE; + + guid = efi_global_variable_guid; + for (i = 1; i < argc; i++, argv++) { + id = (int)simple_strtoul(argv[1], &endp, 16); + if (*endp != '\0' || id > 0xffff) + return CMD_RET_FAILURE; + + sprintf(var_name, "Boot%04X", id); + utf8_utf16_strncpy((u16 **)&var_name16, var_name, 9); + + ret = efi_set_variable(var_name16, &guid, 0, 0, NULL); + if (ret) { + printf("cannot remove Boot%04X", id); + return CMD_RET_FAILURE; + } + } + + return CMD_RET_SUCCESS; +} + +/** + * show_efi_boot_opt_data() - dump UEFI load option + * + * @id: Load option number + * @data: Value of UEFI load option variable + * + * Decode the value of UEFI load option variable and print information. + */ +static void show_efi_boot_opt_data(int id, void *data) +{ + struct efi_load_option lo; + char *label, *p; + size_t label_len16, label_len; + u16 *dp_str; + + efi_deserialize_load_option(&lo, data); + + label_len16 = u16_strlen(lo.label); + label_len = utf16_utf8_strnlen(lo.label, label_len16); + label = malloc(label_len + 1); + if (!label) + return; + p = label; + utf16_utf8_strncpy(&p, lo.label, label_len16); + + printf("Boot%04X:\n", id); + printf("\tattributes: %c%c%c (0x%08x)\n", + /* ACTIVE */ + lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-', + /* FORCE RECONNECT */ + lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-', + /* HIDDEN */ + lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-', + lo.attributes); + printf("\tlabel: %s\n", label); + + dp_str = efi_dp_str(lo.file_path); + printf("\tfile_path: %ls\n", dp_str); + efi_free_pool(dp_str); + + printf("\tdata: %s\n", lo.optional_data); + + free(label); +} + +/** + * show_efi_boot_opt() - dump UEFI load option + * + * @id: Load option number + * + * Dump information defined by UEFI load option. + */ +static void show_efi_boot_opt(int id) +{ + char var_name[9]; + u16 var_name16[9], *p; + efi_guid_t guid; + void *data = NULL; + efi_uintn_t size; + int ret; + + sprintf(var_name, "Boot%04X", id); + p = var_name16; + utf8_utf16_strncpy(&p, var_name, 9); + guid = efi_global_variable_guid; + + size = 0; + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL); + if (ret == (int)EFI_BUFFER_TOO_SMALL) { + data = malloc(size); + ret = efi_get_variable(var_name16, &guid, NULL, &size, data); + } + if (ret == EFI_SUCCESS) + show_efi_boot_opt_data(id, data); + else if (ret == EFI_NOT_FOUND) + printf("Boot%04X: not found\n", id); + + free(data); +} + +/** + * show_efi_boot_dump() - dump all UEFI load options + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot dump" sub-command. + * Dump information of all UEFI load options defined. + * - boot dump + */ +static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + char regex[256]; + char * const regexlist[] = {regex}; + char *variables = NULL, *boot, *value; + int len; + int id; + + if (argc > 1) + return CMD_RET_USAGE; + + snprintf(regex, 256, "efi_.*-.*-.*-.*-.*_Boot[0-9A-F]+"); + + /* TODO: use GetNextVariableName? */ + len = hexport_r(&env_htab, '\n', H_MATCH_REGEX | H_MATCH_KEY, + &variables, 0, 1, regexlist); + + if (!len) + return CMD_RET_SUCCESS; + + if (len < 0) + return CMD_RET_FAILURE; + + boot = variables; + while (*boot) { + value = strstr(boot, "Boot") + 4; + id = (int)simple_strtoul(value, NULL, 16); + show_efi_boot_opt(id); + boot = strchr(boot, '\n'); + if (!*boot) + break; + boot++; + } + free(variables); + + return CMD_RET_SUCCESS; +} + +/** + * show_efi_boot_order() - show order of UEFI load options + * + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Show order of UEFI load options defined by BootOrder variable. + */ +static int show_efi_boot_order(void) +{ + efi_guid_t guid; + u16 *bootorder = NULL; + efi_uintn_t size; + int num, i; + char var_name[9]; + u16 var_name16[9], *p16; + void *data; + struct efi_load_option lo; + char *label, *p; + size_t label_len16, label_len; + efi_status_t ret; + + guid = efi_global_variable_guid; + size = 0; + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size, NULL); + if (ret == EFI_BUFFER_TOO_SMALL) { + bootorder = malloc(size); + ret = efi_get_variable(L"BootOrder", &guid, NULL, &size, + bootorder); + } + if (ret == EFI_NOT_FOUND) { + printf("BootOrder not defined\n"); + ret = CMD_RET_SUCCESS; + goto out; + } else if (ret != EFI_SUCCESS) { + ret = CMD_RET_FAILURE; + goto out; + } + + num = size / sizeof(u16); + for (i = 0; i < num; i++) { + sprintf(var_name, "Boot%04X", bootorder[i]); + p16 = var_name16; + utf8_utf16_strncpy(&p16, var_name, 9); + + size = 0; + ret = efi_get_variable(var_name16, &guid, NULL, &size, NULL); + if (ret != EFI_BUFFER_TOO_SMALL) { + printf("%2d: Boot%04X: (not defined)\n", + i + 1, bootorder[i]); + continue; + } + + data = malloc(size); + if (!data) { + ret = CMD_RET_FAILURE; + goto out; + } + ret = efi_get_variable(var_name16, &guid, NULL, &size, data); + if (ret != EFI_SUCCESS) { + free(data); + ret = CMD_RET_FAILURE; + goto out; + } + + efi_deserialize_load_option(&lo, data); + + label_len16 = u16_strlen(lo.label); + label_len = utf16_utf8_strnlen(lo.label, label_len16); + label = malloc(label_len + 1); + if (!label) { + free(data); + ret = CMD_RET_FAILURE; + goto out; + } + p = label; + utf16_utf8_strncpy(&p, lo.label, label_len16); + printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label); + free(label); + + free(data); + } +out: + free(bootorder); + + return ret; +} + +/** + * do_efi_boot_next() - manage UEFI BootNext variable + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot next" sub-command. + * Set BootNext variable. + * - boot next <id> + */ +static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + u16 bootnext; + efi_uintn_t size; + char *endp; + efi_guid_t guid; + efi_status_t ret; + + if (argc != 2) + return CMD_RET_USAGE; + + bootnext = (u16)simple_strtoul(argv[1], &endp, 16); + if (*endp != '\0' || bootnext > 0xffff) { + printf("invalid value: %s\n", argv[1]); + ret = CMD_RET_FAILURE; + goto out; + } + + guid = efi_global_variable_guid; + size = sizeof(u16); + ret = efi_set_variable(L"BootNext", &guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS, size, &bootnext); + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); +out: + return ret; +} + +/** + * do_efi_boot_order() - manage UEFI BootOrder variable + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot order" sub-command. + * Show order of UEFI load options, or change it in BootOrder variable. + * - boot order [<id> ...] + */ +static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + u16 *bootorder = NULL; + efi_uintn_t size; + int id, i; + char *endp; + efi_guid_t guid; + efi_status_t ret; + + if (argc == 1) + return show_efi_boot_order(); + + argc--; + argv++; + + size = argc * sizeof(u16); + bootorder = malloc(size); + if (!bootorder) + return CMD_RET_FAILURE; + + for (i = 0; i < argc; i++) { + id = (int)simple_strtoul(argv[i], &endp, 16); + if (*endp != '\0' || id > 0xffff) { + printf("invalid value: %s\n", argv[i]); + ret = CMD_RET_FAILURE; + goto out; + } + + bootorder[i] = (u16)id; + } + + guid = efi_global_variable_guid; + ret = efi_set_variable(L"BootOrder", &guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS, size, bootorder); + ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE); +out: + free(bootorder); + + return ret; +} + +static cmd_tbl_t cmd_efidebug_boot_sub[] = { + U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""), + U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""), + U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""), + U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""), + U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order, + "", ""), +}; + +/** + * do_efi_boot_opt() - manage UEFI load options + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "boot" sub-command. + * See above for details of sub-commands. + */ +static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + cmd_tbl_t *cp; + + if (argc < 2) + return CMD_RET_USAGE; + + argc--; argv++; + + cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub, + ARRAY_SIZE(cmd_efidebug_boot_sub)); + if (!cp) + return CMD_RET_USAGE; + + return cp->cmd(cmdtp, flag, argc, argv); +} + +static cmd_tbl_t cmd_efidebug_sub[] = { + U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""), +}; + +/** + * do_efidebug() - display and configure UEFI environment + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, + * CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure + * + * Implement efidebug command which allows us to display and + * configure UEFI environment. + * See above for details of sub-commands. + */ +static int do_efidebug(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + cmd_tbl_t *cp; + efi_status_t r; + + if (argc < 2) + return CMD_RET_USAGE; + + argc--; argv++; + + /* Initialize UEFI drivers */ + r = efi_init_obj_list(); + if (r != EFI_SUCCESS) { + printf("Error: Cannot initialize UEFI sub-system, r = %lu\n", + r & ~EFI_ERROR_MASK); + return CMD_RET_FAILURE; + } + + cp = find_cmd_tbl(argv[0], cmd_efidebug_sub, + ARRAY_SIZE(cmd_efidebug_sub)); + if (!cp) + return CMD_RET_USAGE; + + return cp->cmd(cmdtp, flag, argc, argv); +} + +#ifdef CONFIG_SYS_LONGHELP +static char efidebug_help_text[] = + " - UEFI Shell-like interface to configure UEFI environment\n" + "\n" + "efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n" + " - set UEFI BootXXXX variable\n" + " <load options> will be passed to UEFI application\n" + "efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n" + " - delete UEFI BootXXXX variables\n" + "efidebug boot dump\n" + " - dump all UEFI BootXXXX variables\n" + "efidebug boot next <bootid>\n" + " - set UEFI BootNext variable\n" + "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n" + " - set/show UEFI boot order\n" + "\n"; +#endif + +U_BOOT_CMD( + efidebug, 10, 0, do_efidebug, + "Configure UEFI environment", + efidebug_help_text +);