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
15extern const struct secvar_operations *secvar_ops;
16
17struct 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
32int set_secvar_ops(const struct secvar_operations *ops);
33
34#else
35
36static inline int set_secvar_ops(const struct secvar_operations *ops) { return 0; }
37
38#endif
39
40#endif