linux-kernel - Re: [PATCHv2 0/3] Share common features between AMD SEV / TDX guest

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Date:   Fri, 3 Dec 2021 12:17:11 -0600
From:   Tom Lendacky <thomas.lendacky@....com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, jroedel@...e.de
Cc:     sathyanarayanan.kuppuswamy@...ux.intel.com, ak@...ux.intel.com,
        dan.j.williams@...el.com, hpa@...or.com, knsathya@...nel.org,
        linux-kernel@...r.kernel.org, luto@...nel.org,
        peterz@...radead.org, tony.luck@...el.com
Subject: Re: [PATCHv2 0/3] Share common features between AMD SEV / TDX guest

On 12/3/21 7:23 AM, Kirill A. Shutemov wrote:
> Hi All,
> 
> Intel's Trust Domain Extensions (TDX) protect guest VMs from malicious
> hosts and some physical attacks. TDX has a lot of similarities to AMD SEV.
> Features like encryption/decryption and string I/O unroll support can
> be shared between these two technologies.
> 
> This patch set adds infrastructure changes required to share the code
> between AMD SEV and TDX.

For the series:

Tested-by: Tom Lendacky <thomas.lendacky@....com>

> 
> v2:
>   - Squash first two patches
>   - Rename print_amd_mem_encrypt_feature_info() to print_mem_encrypt_feature_info().
>     It will report TDX feature too.
> 
> Kirill A. Shutemov (1):
>    x86: Move common memory encryption code to mem_encrypt.c
> 
> Kuppuswamy Sathyanarayanan (2):
>    x86/sev: Use CC_ATTR attribute to generalize string I/O unroll
>    x86/sev: Rename mem_encrypt.c to mem_encrypt_amd.c
> 
>   arch/x86/Kconfig              |  10 +-
>   arch/x86/include/asm/io.h     |  20 +-
>   arch/x86/kernel/cc_platform.c |   4 +
>   arch/x86/mm/Makefile          |   7 +-
>   arch/x86/mm/mem_encrypt.c     | 441 +---------------------------------
>   arch/x86/mm/mem_encrypt_amd.c | 438 +++++++++++++++++++++++++++++++++
>   include/linux/cc_platform.h   |  11 +
>   7 files changed, 473 insertions(+), 458 deletions(-)
>   create mode 100644 arch/x86/mm/mem_encrypt_amd.c
>