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Message-ID: <4c8d4075a43e7000e6724e38fe1fa93df10c6109.camel@intel.com>
Date: Fri, 6 Oct 2023 20:40:18 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "Sun, Yi" <yi.sun@...el.com>
CC: "Yan, Dongcheng" <dongcheng.yan@...el.com>,
"Su, Heng" <heng.su@...el.com>, "bp@...en8.de" <bp@...en8.de>,
"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
"peterz@...radead.org" <peterz@...radead.org>,
"x86@...nel.org" <x86@...nel.org>,
"sathyanarayanan.kuppuswamy@...ux.intel.com"
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
"mingo@...hat.com" <mingo@...hat.com>,
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"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] x86/tdx: Dump TDX version During the TD Bootup
On Fri, 2023-10-06 at 19:09 +0800, Sun, Yi wrote:
> > > +
> > > + /* TDX 1.0 does not have the TDCALL TDG.SYS.RD */
> > > +version_1_0:
> > > + td_sys->vendor_id = TDX_VENDOR_INTEL;
> > > + td_sys->major_version = 1;
> > > + td_sys->minor_version = 0;
> >
> > So the main reason that I think you can just print module version in this
> > function instead of tdx_early_init() is because IIUC you are setting up some
> > random value for TDX module 1.0. Probably it's better to just print it's module
> > 1.0 w/o mentioning major/minor.
>
> Actually, it is not a random value here; it is the fixed value for TDX 1.0
> becasue there is not such version info in TDX 1.0.
> I assume we can state major=1 and minor=0 when TDX 1.0 is detected.
> This will prevent confusion for the users.
I mean we cannot assume minor always being 0, IIUC. I am not sure whether we
should report it just as 0.
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