arch/powerpc/include/asm/secvar.h

   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
  36 static inline int set_secvar_ops(const struct secvar_operations *ops) { return 0; }
  37
  38 #endif
  39
  40 #endif