diff options
| author | Ilias Apalodimas | 2020-05-17 22:25:45 +0300 |
|---|---|---|
| committer | Heinrich Schuchardt | 2020-05-17 21:59:53 +0200 |
| commit | b0e4f2c738ff9dd623e77ae1784437411421ab37 (patch) | |
| tree | d18d5bc616ba5fc1bdc3a5a484f916498f527c09 | |
| parent | f042e47e8fb433a7a1f8a25d997ba0fe74e2db53 (diff) | |
cmd: efidebug: Add support for querying UEFI variable storage
With the previous patches that use OP-TEE and StandAloneMM for UEFI
variable storage we've added functionality for efi_query_variable_info.
So let's add the relevant command to efidebug and retrieve information
about the container used to store UEFI variables
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
| -rw-r--r-- | cmd/efidebug.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/cmd/efidebug.c b/cmd/efidebug.c index 5cc0a41af3b..f020d95dbb7 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -1165,6 +1165,58 @@ static int do_efi_test(cmd_tbl_t *cmdtp, int flag, return cp->cmd(cmdtp, flag, argc, argv); } +/** + * do_efi_query_info() - QueryVariableInfo EFI service + * + * @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_FAILURE on failure + * + * Implement efidebug "test" sub-command. + */ + +static int do_efi_query_info(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + efi_status_t ret; + u32 attr = 0; + u64 max_variable_storage_size; + u64 remain_variable_storage_size; + u64 max_variable_size; + int i; + + for (i = 1; i < argc; i++) { + if (!strcmp(argv[i], "-bs")) + attr |= EFI_VARIABLE_BOOTSERVICE_ACCESS; + else if (!strcmp(argv[i], "-rt")) + attr |= EFI_VARIABLE_RUNTIME_ACCESS; + else if (!strcmp(argv[i], "-nv")) + attr |= EFI_VARIABLE_NON_VOLATILE; + else if (!strcmp(argv[i], "-at")) + attr |= + EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS; + } + + ret = EFI_CALL(efi_query_variable_info(attr, + &max_variable_storage_size, + &remain_variable_storage_size, + &max_variable_size)); + if (ret != EFI_SUCCESS) { + printf("Error: Cannot query UEFI variables, r = %lu\n", + ret & ~EFI_ERROR_MASK); + return CMD_RET_FAILURE; + } + + printf("Max storage size %llu\n", max_variable_storage_size); + printf("Remaining storage size %llu\n", remain_variable_storage_size); + printf("Max variable size %llu\n", max_variable_size); + + return CMD_RET_SUCCESS; +} + static cmd_tbl_t cmd_efidebug_sub[] = { U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""), U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices, @@ -1181,6 +1233,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = { "", ""), U_BOOT_CMD_MKENT(test, CONFIG_SYS_MAXARGS, 1, do_efi_test, "", ""), + U_BOOT_CMD_MKENT(query, CONFIG_SYS_MAXARGS, 1, do_efi_query_info, + "", ""), }; /** @@ -1252,7 +1306,9 @@ static char efidebug_help_text[] = "efidebug tables\n" " - show UEFI configuration tables\n" "efidebug test bootmgr\n" - " - run simple bootmgr for test\n"; + " - run simple bootmgr for test\n" + "efidebug query [-nv][-bs][-rt][-at]\n" + " - show size of UEFI variables store\n"; #endif U_BOOT_CMD( |