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authorIlias Apalodimas <ilias.apalodimas@linaro.org>2020-05-17 22:25:45 +0300
committerHeinrich Schuchardt <xypron.glpk@gmx.de>2020-05-17 21:59:53 +0200
commitb0e4f2c738ff9dd623e77ae1784437411421ab37 (patch)
treed18d5bc616ba5fc1bdc3a5a484f916498f527c09 /cmd
parentf042e47e8fb433a7a1f8a25d997ba0fe74e2db53 (diff)
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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>
Diffstat (limited to 'cmd')
-rw-r--r--cmd/efidebug.c58
1 files changed, 57 insertions, 1 deletions
diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index 5cc0a41..f020d95 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(