diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-07-17 23:10:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 11:38:03 +0200 |
| commit | c7753208a94c73d5beb1e4bd843081d6dc7d4678 (patch) | |
| tree | 9206890b53db25e5619f3affe170f0bd9feb7e25 /arch/x86/include/asm/mem_encrypt.h | |
| parent | x86/realmode: Decrypt trampoline area if memory encryption is active (diff) | |
| download | linux-c7753208a94c73d5beb1e4bd843081d6dc7d4678.tar.xz linux-c7753208a94c73d5beb1e4bd843081d6dc7d4678.zip | |
x86, swiotlb: Add memory encryption support
Since DMA addresses will effectively look like 48-bit addresses when the
memory encryption mask is set, SWIOTLB is needed if the DMA mask of the
device performing the DMA does not support 48-bits. SWIOTLB will be
initialized to create decrypted bounce buffers for use by these devices.
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/aa2d29b78ae7d508db8881e46a3215231b9327a7.1500319216.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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h index ab1fe77c2f73..70e55f6b9adf 100644 --- a/arch/x86/include/asm/mem_encrypt.h +++ b/arch/x86/include/asm/mem_encrypt.h @@ -34,6 +34,11 @@ void __init sme_early_init(void); void __init sme_encrypt_kernel(void); void __init sme_enable(void); +/* Architecture __weak replacement functions */ +void __init mem_encrypt_init(void); + +void swiotlb_set_mem_attributes(void *vaddr, unsigned long size); + #else /* !CONFIG_AMD_MEM_ENCRYPT */ #define sme_me_mask 0UL |