1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2019 IBM Corporation
4  * Author: Nayna Jain
5  *
6  * PowerPC secure variable operations.
7  */
8 #ifndef SECVAR_OPS_H
9 #define SECVAR_OPS_H
10 
11 #include <linux/types.h>
12 #include <linux/errno.h>
13 #include <linux/sysfs.h>
14 
15 extern const struct secvar_operations *secvar_ops;
16 
17 struct secvar_operations {
18 	int (*get)(const char *key, u64 key_len, u8 *data, u64 *data_size);
19 	int (*get_next)(const char *key, u64 *key_len, u64 keybufsize);
20 	int (*set)(const char *key, u64 key_len, u8 *data, u64 data_size);
21 	ssize_t (*format)(char *buf, size_t bufsize);
22 	int (*max_size)(u64 *max_size);
23 	const struct attribute **config_attrs;
24 
25 	// NULL-terminated array of fixed variable names
26 	// Only used if get_next() isn't provided
27 	const char * const *var_names;
28 };
29 
30 #ifdef CONFIG_PPC_SECURE_BOOT
31 
32 int set_secvar_ops(const struct secvar_operations *ops);
33 
34 #else
35 
set_secvar_ops(const struct secvar_operations * ops)36 static inline int set_secvar_ops(const struct secvar_operations *ops) { return 0; }
37 
38 #endif
39 
40 #endif
41