linux-kernel - Re: [PATCH v11 20/20] Documentation/x86: Add documentation for TDX host support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <971f158b-f28a-6c1f-c37c-fe67134d737c@intel.com>
Date:   Thu, 8 Jun 2023 16:56:49 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Kai Huang <kai.huang@...el.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     linux-mm@...ck.org, kirill.shutemov@...ux.intel.com,
        tony.luck@...el.com, peterz@...radead.org, tglx@...utronix.de,
        seanjc@...gle.com, pbonzini@...hat.com, david@...hat.com,
        dan.j.williams@...el.com, rafael.j.wysocki@...el.com,
        ying.huang@...el.com, reinette.chatre@...el.com,
        len.brown@...el.com, ak@...ux.intel.com, isaku.yamahata@...el.com,
        chao.gao@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        bagasdotme@...il.com, sagis@...gle.com, imammedo@...hat.com
Subject: Re: [PATCH v11 20/20] Documentation/x86: Add documentation for TDX
 host support

On 6/4/23 07:27, Kai Huang wrote:
> +There is no CPUID or MSR to detect the TDX module.  The kernel detects it
> +by initializing it.

Is this really what you want to say?

If the module is there, SEAMCALL works.  If not, it doesn't.  The module
is assumed to be there when SEAMCALL works.  Right?

Yeah, that first SEAMCALL is probably an initialization call, but feel
like that's beside the point.