linux-kernel - [PATCH v12 0/3] Add TDX Guest Attestation support

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Message-Id: <20220908002723.923241-1-sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Wed,  7 Sep 2022 17:27:19 -0700
From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Shuah Khan <shuah@...nel.org>
Cc:     "H . Peter Anvin" <hpa@...or.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kai Huang <kai.huang@...el.com>,
        Wander Lairson Costa <wander@...hat.com>,
        Isaku Yamahata <isaku.yamahata@...il.com>,
        marcelo.cerri@...onical.com, tim.gardner@...onical.com,
        khalid.elmously@...onical.com, philip.cox@...onical.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: [PATCH v12 0/3] Add TDX Guest Attestation support

Hi All,

Intel's Trust Domain Extensions (TDX) protect guest VMs from malicious
hosts and some physical attacks. VM guest with TDX support is called
as a TDX Guest.

In TDX guest, attestation process is used to verify the TDX guest
trustworthiness to other entities before provisioning secrets to the
guest. For example, a key server may request for attestation before
releasing the encryption keys to mount the encrypted rootfs or
secondary drive.

This patch set adds attestation support for the TDX guest. Details
about the TDX attestation process and the steps involved are explained
in the commit log of Patch 1/3 or in Documentation/x86/tdx.rst (added
by patch 3/3).

Following are the details of the patch set:

Patch 1/3 -> Adds TDREPORT support.
Patch 2/3 -> Adds selftest support for TDREPORT feature.
Patch 3/3 -> Add attestation related documentation.

Commit log history is maintained in the individual patches.

Kuppuswamy Sathyanarayanan (3):
  x86/tdx: Add TDX Guest attestation interface driver
  selftests: tdx: Test TDX attestation GetReport support
  Documentation/x86: Document TDX attestation process

 Documentation/x86/tdx.rst                     |  75 +++++++++
 arch/x86/coco/tdx/tdx.c                       | 112 +++++++++++++
 arch/x86/include/uapi/asm/tdx.h               |  54 ++++++
 tools/arch/x86/include/uapi/asm/tdx.h         |  54 ++++++
 tools/testing/selftests/Makefile              |   1 +
 tools/testing/selftests/tdx/Makefile          |  11 ++
 tools/testing/selftests/tdx/config            |   1 +
 tools/testing/selftests/tdx/tdx_attest_test.c | 155 ++++++++++++++++++
 8 files changed, 463 insertions(+)
 create mode 100644 arch/x86/include/uapi/asm/tdx.h
 create mode 100644 tools/arch/x86/include/uapi/asm/tdx.h
 create mode 100644 tools/testing/selftests/tdx/Makefile
 create mode 100644 tools/testing/selftests/tdx/config
 create mode 100644 tools/testing/selftests/tdx/tdx_attest_test.c

-- 
2.34.1