| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <option.h> |
| #include <smmstore.h> |
| |
| #include <Uefi/UefiBaseType.h> |
| |
| #include "efivars.h" |
| |
| static const EFI_GUID EficorebootNvDataGuid = { |
| 0xceae4c1d, 0x335b, 0x4685, { 0xa4, 0xa0, 0xfc, 0x4a, 0x94, 0xee, 0xa0, 0x85 } }; |
| |
| unsigned int get_uint_option(const char *name, const unsigned int fallback) |
| { |
| struct region_device rdev; |
| enum cb_err ret; |
| uint32_t var; |
| uint32_t size; |
| |
| if (smmstore_lookup_region(&rdev)) |
| return fallback; |
| |
| var = 0; |
| size = sizeof(var); |
| ret = efi_fv_get_option(&rdev, &EficorebootNvDataGuid, name, &var, &size); |
| if (ret != CB_SUCCESS) |
| return fallback; |
| |
| return var; |
| } |
| |
| enum cb_err set_uint_option(const char *name, unsigned int value) |
| { |
| struct region_device rdev; |
| uint32_t var = value; |
| |
| if (smmstore_lookup_region(&rdev)) |
| return CB_CMOS_OTABLE_DISABLED; |
| |
| return efi_fv_set_option(&rdev, &EficorebootNvDataGuid, name, &var, sizeof(var)); |
| } |