linux-kernel - Re: [PATCH v7 03/20] x86/virt/tdx: Disable TDX if X2APIC is not enabled

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Message-ID: <2b8f18d0fa9f996430e9f92d9350a454dc6b8d78.camel@intel.com>
Date:   Mon, 21 Nov 2022 23:40:40 +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>
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>,
        "Shahar, Sagi" <sagis@...gle.com>,
        "imammedo@...hat.com" <imammedo@...hat.com>,
        "Gao, Chao" <chao.gao@...el.com>,
        "Brown, Len" <len.brown@...el.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Huang, Ying" <ying.huang@...el.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v7 03/20] x86/virt/tdx: Disable TDX if X2APIC is not
 enabled

On Mon, 2022-11-21 at 14:00 -0800, Sathyanarayanan Kuppuswamy wrote:
> > > >   
> > > > +	/*
> > > > +	 * TDX requires X2APIC being enabled to prevent potential data
> > > > +	 * leak via APIC MMIO registers.  Just disable TDX if not using
> > > > +	 * X2APIC.
> > > 
> > > Remove the double space.
> > 
> > Sorry which "double space"?
> 
> Before Just disable. It looked like double space. Is it not?

There are bunch of examples in the upstream kernel using "double space" both in
changelog and comment.