2017-07-17 15:10:03 -06:00
|
|
|
/*
|
|
|
|
* AMD Memory Encryption Support
|
|
|
|
*
|
|
|
|
* Copyright (C) 2016 Advanced Micro Devices, Inc.
|
|
|
|
*
|
|
|
|
* Author: Tom Lendacky <thomas.lendacky@amd.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#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 */
|
|
|
|
|
2017-09-07 03:38:37 -06:00
|
|
|
#define sme_me_mask 0ULL
|
2017-07-17 15:10:03 -06:00
|
|
|
|
|
|
|
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
|
|
|
|
|
|
|
|
static inline bool sme_active(void)
|
|
|
|
{
|
|
|
|
return !!sme_me_mask;
|
|
|
|
}
|
|
|
|
|
2017-09-07 03:38:37 -06:00
|
|
|
static inline u64 sme_get_me_mask(void)
|
2017-07-17 15:10:05 -06:00
|
|
|
{
|
|
|
|
return sme_me_mask;
|
|
|
|
}
|
|
|
|
|
2017-09-07 03:38:37 -06:00
|
|
|
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
2017-07-17 15:10:07 -06:00
|
|
|
/*
|
|
|
|
* 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).
|
|
|
|
*/
|
2017-09-07 03:38:37 -06:00
|
|
|
#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
|
2017-07-17 15:10:07 -06:00
|
|
|
|
2017-07-17 15:10:03 -06:00
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
|
|
|
|
#endif /* __MEM_ENCRYPT_H__ */
|