linux-kernel - Re: [PATCH v7 01/20] x86/tdx: Define TDX supported page sizes as macros

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Message-ID: <750471f7-4cd4-5ebb-2790-ab0e153f4337@linux.intel.com>
Date:   Mon, 21 Nov 2022 09:23:58 -0800
From:   Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     "Huang, Kai" <kai.huang@...el.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     "Hansen, Dave" <dave.hansen@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "bagasdotme@...il.com" <bagasdotme@...il.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "Christopherson,, Sean" <seanjc@...gle.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "Yamahata, Isaku" <isaku.yamahata@...el.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Shahar, Sagi" <sagis@...gle.com>,
        "imammedo@...hat.com" <imammedo@...hat.com>,
        "Gao, Chao" <chao.gao@...el.com>,
        "Brown, Len" <len.brown@...el.com>,
        "Huang, Ying" <ying.huang@...el.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v7 01/20] x86/tdx: Define TDX supported page sizes as
 macros



On 11/21/22 1:15 AM, Huang, Kai wrote:
> On Sun, 2022-11-20 at 18:52 -0800, Sathyanarayanan Kuppuswamy wrote:
>>
>> On 11/20/22 4:26 PM, Kai Huang wrote:
>>> +/*
>>> + * TDX supported page sizes (4K/2M/1G).
>>> + *
>>> + * Those values are part of the TDX module ABI.  Do not change them.
>>
>> It would be better if you include specification version and section
>> title.
>>
> 
> Such as below?
> 
> "Those values are part of the TDX module ABI (section "Physical Page Size", TDX
> module 1.0 spec).  Do not change them."

Yes.

> 
> Btw, Dave mentioned we should not put the "section numbers" to the comment:
> 
> https://lore.kernel.org/lkml/2a1886e7-fa5d-99e2-b1da-55ed7c0d024b@intel.com/
> 
> I was trying to follow.

Yes. That's why suggested to put section title.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer