linux-kernel - Re: [PATCH v8 0/5] Add TDX Guest Attestation support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d9df53b3-97ea-d394-fb04-ce2c95d76d82@intel.com>
Date:   Mon, 27 Jun 2022 11:51:33 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Sathyanarayanan Kuppuswamy 
        <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
Cc:     "H . Peter Anvin" <hpa@...or.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
Subject: Re: [PATCH v8 0/5] Add TDX Guest Attestation support

On 6/27/22 07:51, Sathyanarayanan Kuppuswamy wrote:
> In TDX guest, attestation process generally involves the following steps:
> 
> 1. Get the TDREPORT using user specified REPORTDATA. This is implemented
>    using TDG.MR.TDREPORT Module call. An IOCTL interface is added to let
>    userspace get the TDREPORT data  (implemented in patch #1).
>    
> 2. Using the TDREPORT data, generate a remotely verifiable signed Quote.
>    Quote can be generated either using GetQuote hypercall or by communicating
>    with VMM/Quoting Enclave(QE) using VSOCK. In this patch set, only the
>    GetQuote hypercall model is supported. Since Quote generation is an
>    asynchronous request, and takes more time, we let VMM notify the TDX Guest
>    using the callback interrupt. Patch # 2-5 implements Quote generation support,
>    in which Patch # 2 implements the callback interrupt support.

IMNHO, too much gibberish, not enough English, too much superfluous
information.

For instance, why do we need a quote and a report?  Why does this have
an interrupt?