linux-kernel - Re: [PATCH v1 3/3] selftests/tdx: Test GetQuote TDX attestation feature

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Date:   Tue, 28 Mar 2023 14:24:50 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        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>, Jonathan Corbet <corbet@....net>
Cc:     "H . Peter Anvin" <hpa@...or.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        Wander Lairson Costa <wander@...hat.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Guorui Yu <GuoRui.Yu@...ux.alibaba.com>,
        Du Fan <fan.du@...el.com>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v1 3/3] selftests/tdx: Test GetQuote TDX attestation
 feature

On 3/26/23 00:20, Kuppuswamy Sathyanarayanan wrote:
> In TDX guest, the second stage of the attestation process is Quote
> generation. This process is required to convert the locally generated
> TDREPORT into a remotely verifiable Quote. It involves sending the
> TDREPORT data to a Quoting Enclave (QE) which will verify the
> integerity of the TDREPORT and sign it with an attestation key.
> 
> Intel's TDX attestation driver exposes TDX_CMD_GET_QUOTE IOCTL to
> allow user agent get the TD Quote.
> 
> Add a kernel selftest module to verify the Quote generation feature.
> 
> TD Quote generation involves following steps:
> 
> * Get the TDREPORT data using TDX_CMD_GET_REPORT IOCTL.
> * Embed the TDREPORT data in quote buffer and request for quote
>    generation via TDX_CMD_GET_QUOTE IOCTL request.
> * Upon completion of the GetQuote request, check for non zero value
>    in the status field of Quote header to make sure the generated
>    quote is valid.
> 
> Reviewed-by: Tony Luck <tony.luck@...el.com>
> Reviewed-by: Andi Kleen <ak@...ux.intel.com>
> Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
> ---
>   tools/testing/selftests/tdx/tdx_guest_test.c | 68 ++++++++++++++++++--
>   1 file changed, 62 insertions(+), 6 deletions(-)
> 

Looks good to me.

Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah