From patchwork Mon May 11 18:14:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilias Apalodimas X-Patchwork-Id: 245603 List-Id: U-Boot discussion From: ilias.apalodimas at linaro.org (Ilias Apalodimas) Date: Mon, 11 May 2020 21:14:01 +0300 Subject: [PATCH 3/5 v2] cmd: efidebug: Add support for querying UEFI variable storage In-Reply-To: <20200511181403.19448-1-ilias.apalodimas@linaro.org> References: <20200511181403.19448-1-ilias.apalodimas@linaro.org> Message-ID: <20200511181403.19448-4-ilias.apalodimas@linaro.org> 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 Reviewed-by: Heinrich Schuchardt --- cmd/efidebug.c | 44 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) diff --git a/cmd/efidebug.c b/cmd/efidebug.c index d8a76d78a388..a3980772c934 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -1160,6 +1160,44 @@ 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 = EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS | + EFI_VARIABLE_NON_VOLATILE; + u64 max_variable_storage_size; + u64 remain_variable_storage_size; + u64 max_variable_size; + + ret = EFI_CALL(efi_query_variable_info(attr, + &max_variable_storage_size, + &remain_variable_storage_size, + &max_variable_size)); + if (ret != EFI_SUCCESS) + 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, @@ -1176,6 +1214,8 @@ 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, + "", ""), }; /** @@ -1247,7 +1287,9 @@ 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\n" + " - show size of UEFI variables store\n"; #endif U_BOOT_CMD(