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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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7
include/linux/mem_encrypt.h
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@@ -23,11 +23,14 @@
#define sme_me_mask 0ULL
static inline bool sme_active(void) { return false; }
static inline bool sev_active(void) { return false; }
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
static inline bool sme_active(void)
static inline bool mem_encrypt_active(void)
{
return !!sme_me_mask;
return sme_me_mask;
}
static inline u64 sme_get_me_mask(void)