Re: [Part1 PATCH v4 11/17] x86/mm: DMA support for SEV memory encryption

[Borislav Petkov]

On Sat, Sep 16, 2017 at 07:34:12AM -0500, Brijesh Singh wrote:

Add a verb to patch subject:

Subject: x86/mm: Add DMA support for ...

> From: Tom Lendacky <thomas.lendacky@xxxxxxx>
> 
> DMA access to encrypted memory cannot be performed when SEV is active.
> In order for DMA to properly work when SEV is active, the SWIOTLB bounce
> buffers must be used.
> 
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
> Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
> ---
>  arch/x86/mm/mem_encrypt.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
>  lib/swiotlb.c             |  5 +--
>  2 files changed, 89 insertions(+), 2 deletions(-)

With that:

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix ImendÃrffer, Jane Smithard, Graham Norton, HRB 21284 (AG NÃrnberg)
--