linux-kernel - Re: [RFC PATCH 0/5] Add TEE interface support to AMD Secure Processor driver

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Message-ID: <24a6506c-eb90-5a70-862f-95571e668a5d@amd.com>
Date:   Wed, 23 Oct 2019 16:27:26 +0000
From:   "Lendacky, Thomas" <Thomas.Lendacky@....com>
To:     "Thomas, Rijo-john" <Rijo-john.Thomas@....com>,
        "Hook, Gary" <Gary.Hook@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
CC:     "Singh, Brijesh" <brijesh.singh@....com>,
        "Easow, Nimesh" <Nimesh.Easow@....com>,
        "Rangasamy, Devaraj" <Devaraj.Rangasamy@....com>
Subject: Re: [RFC PATCH 0/5] Add TEE interface support to AMD Secure Processor
 driver

On 10/23/19 6:27 AM, Thomas, Rijo-john 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.

There are some outstanding patches that have been submitted that modify
some of the same files you are modifying, so you'll need to rebase after
those patches are applied. Also, one patch was applied through the KVM
tree, not sure how to handle that.

For reference, here are the submitted patches:

https://lore.kernel.org/kvm/6108561e392460ade67f7f70d9bfa9f56a925d0a.1570137447.git.thomas.lendacky@amd.com/
https://lore.kernel.org/linux-crypto/20191017223459.64281-1-Ashish.Kalra@amd.com/
https://lore.kernel.org/linux-crypto/157166548259.28287.18118802909801681546.stgit@taos/

Thanks,
Tom

> 
> Rijo Thomas (5):
>   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 - 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 |  983 +++------------------------------------
>  drivers/crypto/ccp/psp-dev.h |   50 +-
>  drivers/crypto/ccp/sev-dev.c | 1041 ++++++++++++++++++++++++++++++++++++++++++
>  drivers/crypto/ccp/sev-dev.h |   62 +++
>  drivers/crypto/ccp/sp-dev.h  |   17 +-
>  drivers/crypto/ccp/sp-pci.c  |   43 +-
>  drivers/crypto/ccp/tee-dev.c |  363 +++++++++++++++
>  drivers/crypto/ccp/tee-dev.h |  109 +++++
>  include/linux/psp-tee.h      |   72 +++
>  10 files changed, 1796 insertions(+), 948 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
>