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Message-ID: <932869b757b384426ada376cd9791697353c2247.camel@intel.com>
Subject: Re: [PATCH v8 1/5] x86/tdx: Add TDX Guest attestation interface
 driver
From:   Kai Huang <kai.huang@intel.com>
To:     Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        Dave Hansen <dave.hansen@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org
Cc:     "H . Peter Anvin" <hpa@zytor.com>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Tony Luck <tony.luck@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Wander Lairson Costa <wander@redhat.com>,
        Isaku Yamahata <isaku.yamahata@gmail.com>,
        marcelo.cerri@canonical.com, tim.gardner@canonical.com,
        khalid.elmously@canonical.com, philip.cox@canonical.com,
        linux-kernel@vger.kernel.org
Date:   Wed, 06 Jul 2022 10:31:32 +1200
In-Reply-To: <74383158-460e-0cd1-94bc-faca5b8175ea@linux.intel.com>
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On Tue, 2022-07-05 at 14:21 -0700, Sathyanarayanan Kuppuswamy wrote:
> SGX is a related feature. It also uses IOCTL approach for enclave provisi=
oning.
>=20
> arch/x86/kernel/cpu/sgx/ioctl.c

SGX isn't a good example here.  The IOCTLs are used to create enclaves, but=
 not
for attestation.  SGX attestation relies on enclave itself to get/verify th=
e
report, etc, so has no interaction with the kernel.