linux-kernel - Re: [RFC PATCH v2 3/3] virt: Add sev_secret module to expose confidential computing secrets

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Message-ID: <YNujUGuIpMc8VJPS@zn.tnic>
Date:   Wed, 30 Jun 2021 00:48:48 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Dov Murik <dovmurik@...ux.ibm.com>
Cc:     linux-efi@...r.kernel.org, Laszlo Ersek <lersek@...hat.com>,
        Ashish Kalra <ashish.kalra@....com>,
        Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "Dr. David Alan Gilbert" <dgilbert@...hat.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        Tobin Feldman-Fitzthum <tobin@...ux.ibm.com>,
        Jim Cadden <jcadden@....com>, linux-coco@...ts.linux.dev,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 3/3] virt: Add sev_secret module to expose
 confidential computing secrets

On Tue, Jun 29, 2021 at 10:23:49AM +0300, Dov Murik wrote:
> But not if it's a generic driver that is useful for other confidential
> computing implementations.  Consider some non-encrypting guest memory
> isolation mechanism where the host can't read most guest pages; this
> module might be useful there too.

Anything concrete or just hypothetical?

In any case, if this thing is generic, it should not have "AMD" and
"SEV" in the strings.

> Also, isn't it a bit weird to depend on CONFIG_AMD_MEM_ENCRYPT but not
> use any of its APIs?

Yeah, see above.

Thx.

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg