Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-09 03:21:51 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

efi_loader: prepare for read only OP-TEE variables

Browse source 
We currently have two implementations of UEFI variables:

* variables provided via an OP-TEE module
* variables stored in the U-Boot environment

Read only variables are up to now only implemented in the U-Boot
environment implementation.

Provide a common interface for both implementations that allows handling
read-only variables.

As variable access is limited to very few source files put variable
related definitions into new include efi_variable.h instead of efi_loader.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-06-22 18:10:27 +02:00
parent 5a8d1f60b2
commit f2d2b3a11c
6 changed files with 193 additions and 181 deletions
Download patch file Download diff file Expand all files Collapse all files

43
include/efi_variable.h Normal file
View file

@ -0,0 +1,43 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
*/
#ifndef _EFI_VARIABLE_H
#define _EFI_VARIABLE_H
#include <linux/bitops.h>
#define EFI_VARIABLE_READ_ONLY BIT(31)
/**
* efi_get_variable() - retrieve value of a UEFI variable
*
* @variable_name: name of the variable
* @vendor: vendor GUID
* @attributes: attributes of the variable
* @data_size: size of the buffer to which the variable value is copied
* @data: buffer to which the variable value is copied
* @timep: authentication time (seconds since start of epoch)
* Return: status code
*/
efi_status_t efi_get_variable_int(u16 *variable_name, const efi_guid_t *vendor,
u32 *attributes, efi_uintn_t *data_size,
void *data, u64 *timep);
/**
* efi_set_variable() - set value of a UEFI variable
*
* @variable_name: name of the variable
* @vendor: vendor GUID
* @attributes: attributes of the variable
* @data_size: size of the buffer with the variable value
* @data: buffer with the variable value
* @ro_check: check the read only read only bit in attributes
* Return: status code
*/
efi_status_t efi_set_variable_int(u16 *variable_name, const efi_guid_t *vendor,
u32 attributes, efi_uintn_t data_size,
const void *data, bool ro_check);
#endif