lib/efi_selftest/efi_selftest_variables_runtime.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * efi_selftest_variables_runtime
   4  *
   5  * Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
   6  *
   7  * This unit test checks the runtime services for variables after
   8  * ExitBootServices():
   9  * GetVariable, GetNextVariableName, SetVariable, QueryVariableInfo.
  10  */
  11
  12 #include <efi_selftest.h>
  13
  14 #define EFI_ST_MAX_DATA_SIZE 16
  15 #define EFI_ST_MAX_VARNAME_SIZE 40
  16
  17 static struct efi_boot_services *boottime;
  18 static struct efi_runtime_services *runtime;
  19 static const efi_guid_t guid_vendor0 =
  20         EFI_GUID(0x67029eb5, 0x0af2, 0xf6b1,
  21                  0xda, 0x53, 0xfc, 0xb5, 0x66, 0xdd, 0x1c, 0xe6);
  22
  23 /*
  24  * Setup unit test.
  25  *
  26  * @handle      handle of the loaded image
  27  * @systable    system table
  28  */
  29 static int setup(const efi_handle_t img_handle,
  30                  const struct efi_system_table *systable)
  31 {
  32         boottime = systable->boottime;
  33         runtime = systable->runtime;
  34
  35         return EFI_ST_SUCCESS;
  36 }
  37
  38 /**
  39  * execute() - execute unit test
  40  *
  41  * As runtime support is not implmented expect EFI_UNSUPPORTED to be returned.
  42  */
  43 static int execute(void)
  44 {
  45         efi_status_t ret;
  46         efi_uintn_t len;
  47         u32 attr;
  48         u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
  49                     0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
  50         u8 data[EFI_ST_MAX_DATA_SIZE];
  51         u16 varname[EFI_ST_MAX_VARNAME_SIZE];
  52         efi_guid_t guid;
  53         u64 max_storage, rem_storage, max_size;
  54
  55         ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
  56                                            &max_storage, &rem_storage,
  57                                            &max_size);
  58         if (ret != EFI_UNSUPPORTED) {
  59                 efi_st_error("QueryVariableInfo failed\n");
  60                 return EFI_ST_FAILURE;
  61         }
  62
  63         ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
  64                                     EFI_VARIABLE_BOOTSERVICE_ACCESS |
  65                                     EFI_VARIABLE_RUNTIME_ACCESS,
  66                                     3, v + 4);
  67         if (ret != EFI_UNSUPPORTED) {
  68                 efi_st_error("SetVariable failed\n");
  69                 return EFI_ST_FAILURE;
  70         }
  71         len = 3;
  72         ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
  73                                     &attr, &len, data);
  74         if (ret != EFI_UNSUPPORTED) {
  75                 efi_st_error("GetVariable failed\n");
  76                 return EFI_ST_FAILURE;
  77         }
  78         memset(&guid, 0, 16);
  79         *varname = 0;
  80         ret = runtime->get_next_variable_name(&len, varname, &guid);
  81         if (ret != EFI_UNSUPPORTED) {
  82                 efi_st_error("GetNextVariableName failed\n");
  83                 return EFI_ST_FAILURE;
  84         }
  85
  86         return EFI_ST_SUCCESS;
  87 }
  88
  89 EFI_UNIT_TEST(variables_run) = {
  90         .name = "variables at runtime",
  91         .phase = EFI_SETUP_BEFORE_BOOTTIME_EXIT,
  92         .setup = setup,
  93         .execute = execute,
  94 };