LXR uboot/lib/efi_selftest/efi_selftest_variables

   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
  17static struct efi_boot_services *boottime;
  18static struct efi_runtime_services *runtime;
  19static const efi_guid_t guid_vendor0 = EFI_GLOBAL_VARIABLE_GUID;
  20
  21/*
  22 * Setup unit test.
  23 *
  24 * @handle      handle of the loaded image
  25 * @systable    system table
  26 */
  27static int setup(const efi_handle_t img_handle,
  28                 const struct efi_system_table *systable)
  29{
  30        boottime = systable->boottime;
  31        runtime = systable->runtime;
  32
  33        return EFI_ST_SUCCESS;
  34}
  35
  36/**
  37 * execute() - execute unit test
  38 *
  39 * As runtime support is not implmented expect EFI_UNSUPPORTED to be returned.
  40 */
  41static int execute(void)
  42{
  43        efi_status_t ret;
  44        efi_uintn_t len;
  45        u32 attr;
  46        u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
  47                    0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
  48        u8 data[EFI_ST_MAX_DATA_SIZE];
  49        u16 varname[EFI_ST_MAX_VARNAME_SIZE];
  50        efi_guid_t guid;
  51        u64 max_storage, rem_storage, max_size;
  52
  53        ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
  54                                           &max_storage, &rem_storage,
  55                                           &max_size);
  56        if (ret != EFI_UNSUPPORTED) {
  57                efi_st_error("QueryVariableInfo failed\n");
  58                return EFI_ST_FAILURE;
  59        }
  60
  61        ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
  62                                    EFI_VARIABLE_BOOTSERVICE_ACCESS |
  63                                    EFI_VARIABLE_RUNTIME_ACCESS,
  64                                    3, v + 4);
  65        if (ret != EFI_UNSUPPORTED) {
  66                efi_st_error("SetVariable failed\n");
  67                return EFI_ST_FAILURE;
  68        }
  69        len = EFI_ST_MAX_DATA_SIZE;
  70        ret = runtime->get_variable(L"PlatformLangCodes", &guid_vendor0,
  71                                    &attr, &len, data);
  72        if (ret != EFI_SUCCESS) {
  73                efi_st_error("GetVariable failed\n");
  74                return EFI_ST_FAILURE;
  75        }
  76        memset(&guid, 0, 16);
  77        *varname = 0;
  78        len = 2 * EFI_ST_MAX_VARNAME_SIZE;
  79        ret = runtime->get_next_variable_name(&len, varname, &guid);
  80        if (ret != EFI_SUCCESS) {
  81                efi_st_error("GetNextVariableName failed\n");
  82                return EFI_ST_FAILURE;
  83        }
  84
  85        return EFI_ST_SUCCESS;
  86}
  87
  88EFI_UNIT_TEST(variables_run) = {
  89        .name = "variables at runtime",
  90        .phase = EFI_SETUP_BEFORE_BOOTTIME_EXIT,
  91        .setup = setup,
  92        .execute = execute,
  93};
  94