Re: [PATCH v9 1/6] x86/tdx: Add TDX Guest attestation interface driver

[Dave Hansen]

On 8/22/22 14:36, Borislav Petkov wrote:
> Which makes my initial suggestion of calling this whole guest
> functionality a "tdx" driver not such a bad idea... Depends on
> whether there will be a split at all or it'll continue gaining more
> functionality.

Yep, let's get the crystal ball out.

TDX folks:

What other ioctl()s are in the pipeline for the guest side?

What ioctl()s are in the pipeline for the host side?  Are they all part
of /dev/kvm, or are there any TDX-specific "drivers" for the host?

We want to avoid both:

 1. A driver called /dev/tdx (or "tdx-guest) which is only and will only
    ever do TDX guest attestation.
 2. A driver called /dev/tdx-guest-attest which shares a ton of
    functionality with some future TDX guest feature like
    /dev/tdx-guest-snazzy-feature-foo.  Then, a new driver every time
    a new snazzy TDX feature shows up.