linux-kernel - Re: [PATCH v6 21/21] Documentation/x86: Add documentation for TDX host support

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Message-ID: <4c382e9983d577d4895257a606e5d03876cc82ff.camel@intel.com>
Date:   Fri, 28 Oct 2022 02:31:11 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>
CC:     "Hansen, Dave" <dave.hansen@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "bagasdotme@...il.com" <bagasdotme@...il.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>,
        "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v6 21/21] Documentation/x86: Add documentation for TDX
 host support

On Thu, 2022-10-27 at 05:38 -0700, Andi Kleen wrote:
> > +The current implementation doesn't explicitly prevent adding any non-TDX
> > +memory to system-wide memory pool, but depends on the machine owner to
> > +make sure such operation won't happen.  For example, the machine owner
> > +should never plug any NVDIMM or CXL memory to the machine, or use kmem
> > +driver to hot-add any to the core-mm.
> 
> 
> I assume that will be fixed in some form, so doesn't need to be in the 
> documentation.

Based on we need to handle this in some way so yes this will go away.

> 
> 
> > +
> > +To keep things simple, this series doesn't handle memory hotplug at all,
> > +but depends on the machine owner to not do any memory hotplug operation.
> > +For example, the machine owner should not plug any NVDIMM or CXL memory
> > +into the machine, or use kmem driver to plug NVDIMM or CXL memory to the
> > +core-mm.
> 
> 
> Dito. Documentation/* shouldn't contain temporary things like a commit log.

Oops.  I just copied from some commit log.  Thanks for catching!