linux-kernel - Re: [PATCH v8 1/5] x86/tdx: Add TDX Guest attestation interface driver

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Message-ID: <8b6f3f9f-71c8-2b6f-20a3-5e9c259a1b9a@intel.com>
Date:   Tue, 5 Jul 2022 11:52:10 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Kai Huang <kai.huang@...el.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>,
        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 1/5] x86/tdx: Add TDX Guest attestation interface
 driver

On 7/5/22 11:45, Sathyanarayanan Kuppuswamy wrote:
> Yes, there are many ways to design this. But I still think IOCTL is a better fit
> for the request/response kind of use case.

Are there any other similar ABIs in the kernel?  What kind of mechanism
do they use?