[PATCH v5 22/32] x86, swiotlb: DMA support for memory encryption

Tom Lendacky thomas.lendacky at amd.com
Fri May 19 12:54:08 PDT 2017

On 5/16/2017 9:27 AM, Borislav Petkov wrote:
> On Tue, Apr 18, 2017 at 04:20:10PM -0500, Tom Lendacky wrote:
>> 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.
> Use a verb in the subject:
> Subject: x86, swiotlb: Add memory encryption support
> or similar.

Will do.



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