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x86/mm: Add Secure Encrypted Virtualization (SEV) support

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Provide support for Secure Encrypted Virtualization (SEV). This initial
support defines a flag that is used by the kernel to determine if it is
running with SEV active.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Tested-by: Borislav Petkov <bp@suse.de>
Cc: kvm@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20171020143059.3291-3-brijesh.singh@amd.com
This commit is contained in:
Tom Lendacky
2017-10-20 09:30:44 -05:00
committed by Thomas Gleixner
parent 33e63acc11
commit d8aa7eea78
3 changed files with 37 additions and 2 deletions
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6
arch/x86/include/asm/mem_encrypt.h
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@@ -47,6 +47,9 @@ void __init mem_encrypt_init(void);
void swiotlb_set_mem_attributes(void *vaddr, unsigned long size);
bool sme_active(void);
bool sev_active(void);
#else /* !CONFIG_AMD_MEM_ENCRYPT */
#define sme_me_mask 0ULL
@@ -64,6 +67,9 @@ static inline void __init sme_early_init(void) { }
static inline void __init sme_encrypt_kernel(void) { }
static inline void __init sme_enable(struct boot_params *bp) { }
static inline bool sme_active(void) { return false; }
static inline bool sev_active(void) { return false; }
#endif /* CONFIG_AMD_MEM_ENCRYPT */
/*