linux-kernel - Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand

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Message-ID: <e7878046807833c718b54eae3e3066a28cca406b.camel@intel.com>
Date:   Tue, 27 Jun 2023 10:37:02 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
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        "Luck, Tony" <tony.luck@...el.com>,
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Subject: Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on
 demand

On Mon, 2023-06-26 at 14:21 -0700, Sathyanarayanan Kuppuswamy wrote:
> > +	/* All '0's are just unused parameters. */
> 
> I have noticed that you add the above comment whenever you call seamcall()
> with
> 0 as parameters. Is this a ask from the maintainer? If not, I think you can
> skip
> it. Just explaining the parameters in seamcall function definition is good
> enough.

Yes I followed maintainer (I didn't bother to find the exact link this time,
though).  I think in this way we don't need to go to TDX module spec to check
whether 0 has meaning in each SEAMCALL, especially in code review.  I kinda
agree having them in multiple places is a little bit noisy, but I don't have a
better way.