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Message-ID: <145def74bc800a625d51f528c20c1be4da8c9e27.camel@intel.com>
Date: Sun, 8 Jan 2023 22:26:29 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
"Hansen, Dave" <dave.hansen@...el.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "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>,
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"tglx@...utronix.de" <tglx@...utronix.de>,
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"Yamahata, Isaku" <isaku.yamahata@...el.com>,
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"Brown, Len" <len.brown@...el.com>,
"sathyanarayanan.kuppuswamy@...ux.intel.com"
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
"Huang, Ying" <ying.huang@...el.com>,
"Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v8 04/16] x86/virt/tdx: Add skeleton to initialize TDX on
demand
On Fri, 2023-01-06 at 09:14 -0800, Dave Hansen wrote:
> On 12/8/22 22:52, Kai Huang wrote:
> >
> > The TDX module will be initialized in multi-steps defined by the TDX
> > module and most of those steps involve a specific SEAMCALL:
> >
> > 1) Get the TDX module information and TDX-capable memory regions
> > (TDH.SYS.INFO).
> > 2) Build the list of TDX-usable memory regions.
> > 3) Construct a list of "TD Memory Regions" (TDMRs) to cover all
> > TDX-usable memory regions.
> > 4) Pick up one TDX private KeyID as the global KeyID.
> > 5) Configure the TDMRs and the global KeyID to the TDX module
> > (TDH.SYS.CONFIG).
> > 6) Configure the global KeyID on all packages (TDH.SYS.KEY.CONFIG).
> > 7) Initialize all TDMRs (TDH.SYS.TDMR.INIT).
>
> I don't think you really need this *AND* the "TODO" comments in
> init_tdx_module(). Just say:
>
> Add a placeholder tdx_enable() to initialize the TDX module on
> demand. The TODO list will be pared down as functionality is
> added.
Yes agreed. Will do. Thanks.
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