efi_selftest_variables_runtime.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_variables_runtime
*
* Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* This unit test checks the runtime services for variables after
* ExitBootServices():
* GetVariable, GetNextVariableName, SetVariable, QueryVariableInfo.
*/
#include <efi_selftest.h>
#define EFI_ST_MAX_DATA_SIZE 16
#define EFI_ST_MAX_VARNAME_SIZE 40
static struct efi_boot_services *boottime;
static struct efi_runtime_services *runtime;
static const efi_guid_t guid_vendor0 =
EFI_GUID(0x67029eb5, 0x0af2, 0xf6b1,
0xda, 0x53, 0xfc, 0xb5, 0x66, 0xdd, 0x1c, 0xe6);
/*
* Setup unit test.
*
* @handle handle of the loaded image
* @systable system table
*/
static int setup(const efi_handle_t img_handle,
const struct efi_system_table *systable)
{
boottime = systable->boottime;
runtime = systable->runtime;
return EFI_ST_SUCCESS;
}
/**
* execute() - execute unit test
*
* As runtime support is not implmented expect EFI_UNSUPPORTED to be returned.
*/
static int execute(void)
{
efi_status_t ret;
efi_uintn_t len;
u32 attr;
u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
u8 data[EFI_ST_MAX_DATA_SIZE];
u16 varname[EFI_ST_MAX_VARNAME_SIZE];
efi_guid_t guid;
u64 max_storage, rem_storage, max_size;
ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
&max_storage, &rem_storage,
&max_size);
if (ret != EFI_UNSUPPORTED) {
efi_st_error("QueryVariableInfo failed\n");
return EFI_ST_FAILURE;
}
ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
3, v + 4);
if (ret != EFI_UNSUPPORTED) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
len = 3;
ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
&attr, &len, data);
if (ret != EFI_UNSUPPORTED) {
efi_st_error("GetVariable failed\n");
return EFI_ST_FAILURE;
}
memset(&guid, 0, 16);
*varname = 0;
ret = runtime->get_next_variable_name(&len, varname, &guid);
if (ret != EFI_UNSUPPORTED) {
efi_st_error("GetNextVariableName failed\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(variables_run) = {
.name = "variables at runtime",
.phase = EFI_SETUP_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
};