linux-kernel - Re: [RFC PATCH v3 0/6] Add TEE interface support to AMD Secure Processor driver

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Message-ID: <a0c7cbd0-2195-195b-d753-7cbadfd4a272@amd.com>
Date:   Tue, 24 Dec 2019 16:25:55 +0530
From:   "Thomas, Rijo-john" <Rijo-john.Thomas@....com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Tom Lendacky <thomas.lendacky@....com>,
        Gary Hook <gary.hook@....com>,
        "David S . Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        Nimesh Easow <Nimesh.Easow@....com>,
        Devaraj Rangasamy <Devaraj.Rangasamy@....com>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [RFC PATCH v3 0/6] Add TEE interface support to AMD Secure
 Processor driver

Hi Herbert,

On 20/12/19 12:34 pm, Herbert Xu wrote:
> On Wed, Dec 04, 2019 at 11:48:57AM +0530, Rijo Thomas wrote:
>> The goal of this patch series is to introduce TEE (Trusted Execution
>> Environment) interface support to AMD Secure Processor driver. The
>> TEE is a secure area of a processor which ensures that sensitive data
>> is stored, processed and protected in an isolated and trusted
>> environment. The Platform Security Processor (PSP) is a dedicated
>> processor which provides TEE to enable HW platform security. It offers
>> protection against software attacks generated in Rich Operating System
>> (Rich OS) such as Linux running on x86.
>>
>> Based on the platform feature support, the PSP is capable of supporting
>> either SEV (Secure Encrypted Virtualization) and/or TEE. The first three
>> patches in this series is about moving SEV specific functions and data
>> structures from PSP device driver file to a dedicated SEV interface
>> driver file. The last two patches add TEE interface support to AMD
>> Secure Processor driver. This TEE interface will be used by AMD-TEE
>> driver to submit command buffers for processing in PSP Trusted Execution
>> Environment.
>>
>> v3:
>> * Rebased the patches onto cryptodev-2.6 tree with base commit
>>   4ee812f6143d (crypto: vmx - Avoid weird build failures)
>>
>> v2:
>> * Rebased the patches on cryptodev-2.6 tree with base commit
>>   d158367682cd (crypto: atmel - Fix selection of CRYPTO_AUTHENC)
>> * Regenerated patch with correct diff-stat to show file rename
>> * Used Co-developed-by: tag to give proper credit to co-author
>>
>> Rijo Thomas (6):
>>   crypto: ccp - rename psp-dev files to sev-dev
>>   crypto: ccp - create a generic psp-dev file
>>   crypto: ccp - move SEV vdata to a dedicated data structure
>>   crypto: ccp - check whether PSP supports SEV or TEE before
>>     initialization
>>   crypto: ccp - add TEE support for Raven Ridge
>>   crypto: ccp - provide in-kernel API to submit TEE commands
>>
>>  drivers/crypto/ccp/Makefile  |    4 +-
>>  drivers/crypto/ccp/psp-dev.c | 1033 ++++------------------------------------
>>  drivers/crypto/ccp/psp-dev.h |   51 +-
>>  drivers/crypto/ccp/sev-dev.c | 1068 ++++++++++++++++++++++++++++++++++++++++++
>>  drivers/crypto/ccp/sev-dev.h |   63 +++
>>  drivers/crypto/ccp/sp-dev.h  |   17 +-
>>  drivers/crypto/ccp/sp-pci.c  |   43 +-
>>  drivers/crypto/ccp/tee-dev.c |  364 ++++++++++++++
>>  drivers/crypto/ccp/tee-dev.h |  110 +++++
>>  include/linux/psp-tee.h      |   73 +++
>>  10 files changed, 1842 insertions(+), 984 deletions(-)
>>  create mode 100644 drivers/crypto/ccp/sev-dev.c
>>  create mode 100644 drivers/crypto/ccp/sev-dev.h
>>  create mode 100644 drivers/crypto/ccp/tee-dev.c
>>  create mode 100644 drivers/crypto/ccp/tee-dev.h
>>  create mode 100644 include/linux/psp-tee.h
> 
> All applied.  Thanks.
> 

Thank you for pulling in the changes!
Can you also pull in the patch series titled - TEE driver for AMD APUs? It is
related to this patch series.

Jens who is the TEE subsystem maintainer has given an Acked-by for the
patch series. Please refer link: https://lkml.org/lkml/2019/12/16/608

Thanks,
Rijo