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cmd: efidebug: Add support for querying UEFI variable storage

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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>
This commit is contained in:
Ilias Apalodimas 2020-05-17 22:25:45 +03:00 • committed by Heinrich Schuchardt
parent f042e47e8f
commit b0e4f2c738
1 changed files with 57 additions and 1 deletions
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58
cmd/efidebug.c
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@ -1165,6 +1165,58 @@ static int do_efi_test(cmd_tbl_t *cmdtp, int flag,
return cp->cmd(cmdtp, flag, argc, argv); 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[] = { static cmd_tbl_t cmd_efidebug_sub[] = {
U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""), 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, 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(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" "efidebug tables\n"
" - show UEFI configuration tables\n" " - show UEFI configuration tables\n"
"efidebug test bootmgr\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 #endif
U_BOOT_CMD( U_BOOT_CMD(