linux-kernel - Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest

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Message-ID: <YR6UR9JWD6l6z9Cn@zn.tnic>
Date:   Thu, 19 Aug 2021 19:26:31 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Tom Lendacky <thomas.lendacky@....com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
        iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-graphics-maintainer@...are.com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        kexec@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
        Brijesh Singh <brijesh.singh@....com>,
        Joerg Roedel <joro@...tes.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has()

On Thu, Aug 19, 2021 at 10:52:53AM +0100, Christoph Hellwig wrote:
> Which suggest that the name is not good to start with.  Maybe protected
> hardware, system or platform might be a better choice?

Yah, coming up with a proper name here hasn't been easy.
prot_guest_has() is not the first variant.

>From all three things you suggest above, I guess calling it a "platform"
is the closest. As in, this is a confidential computing platform which
provides host and guest facilities etc.

So calling it

confidential_computing_platform_has()

is obviously too long.

ccp_has() clashes with the namespace of drivers/crypto/ccp/ which is
used by the technology too.

coco_platform_has() is too unserious.

So I guess

cc_platform_has()

ain't all that bad.

Unless you have a better idea, ofc.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette