/* SPDX-License-Identifier: GPL-2.0-only */
  /*
   * AMD Memory Encryption Support
   *
   * Copyright (C) 2016 Advanced Micro Devices, Inc.
   *
   * Author: Tom Lendacky <thomas.lendacky@amd.com>
   */
  
  #ifndef __MEM_ENCRYPT_H__
  #define __MEM_ENCRYPT_H__
  
  #ifndef __ASSEMBLY__
  
  #ifdef CONFIG_ARCH_HAS_MEM_ENCRYPT
  
  #include <asm/mem_encrypt.h>
  
  #else	/* !CONFIG_ARCH_HAS_MEM_ENCRYPT */
  
  static inline bool mem_encrypt_active(void) { return false; }
  
  #endif	/* CONFIG_ARCH_HAS_MEM_ENCRYPT */
  
  #ifdef CONFIG_AMD_MEM_ENCRYPT
  /*
   * The __sme_set() and __sme_clr() macros are useful for adding or removing
   * the encryption mask from a value (e.g. when dealing with pagetable
   * entries).
   */
  #define __sme_set(x)		((x) | sme_me_mask)
  #define __sme_clr(x)		((x) & ~sme_me_mask)
  #else
  #define __sme_set(x)		(x)
  #define __sme_clr(x)		(x)
  #endif
  
  #endif	/* __ASSEMBLY__ */
  
  #endif	/* __MEM_ENCRYPT_H__ */