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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-07-17 16:10:05 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 11:37:59 +0200 |
| commit | 5868f3651fa0dff96a57f94d49247d3ef320ebe2 (patch) | |
| tree | 11b9fdc343371d2d40d476ebddde2d0532c78ea9 /arch/x86/include/asm/mem_encrypt.h | |
| parent | 33c2b803edd13487518a2c7d5002d84d7e9c878f (diff) | |
| download | linux-0-day-5868f3651fa0dff96a57f94d49247d3ef320ebe2.tar.gz linux-0-day-5868f3651fa0dff96a57f94d49247d3ef320ebe2.tar.xz | |
x86/mm: Add support to enable SME in early boot processing
Add support to the early boot code to use Secure Memory Encryption (SME).
Since the kernel has been loaded into memory in a decrypted state, encrypt
the kernel in place and update the early pagetables with the memory
encryption mask so that new pagetable entries will use memory encryption.
The routines to set the encryption mask and perform the encryption are
stub routines for now with functionality to be added in a later patch.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Toshimitsu Kani <toshi.kani@hpe.com>
Cc: kasan-dev@googlegroups.com
Cc: kvm@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/e52ad781f085224bf835b3caff9aa3aee6febccb.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/mem_encrypt.h')
| -rw-r--r-- | arch/x86/include/asm/mem_encrypt.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h index a1057961ac466..475e34f537938 100644 --- a/arch/x86/include/asm/mem_encrypt.h +++ b/arch/x86/include/asm/mem_encrypt.h @@ -15,14 +15,22 @@ #ifndef __ASSEMBLY__ +#include <linux/init.h> + #ifdef CONFIG_AMD_MEM_ENCRYPT extern unsigned long sme_me_mask; +void __init sme_encrypt_kernel(void); +void __init sme_enable(void); + #else /* !CONFIG_AMD_MEM_ENCRYPT */ #define sme_me_mask 0UL +static inline void __init sme_encrypt_kernel(void) { } +static inline void __init sme_enable(void) { } + #endif /* CONFIG_AMD_MEM_ENCRYPT */ #endif /* __ASSEMBLY__ */ |