Re: [PATCH v2 0/3] Expose TDX Module version

[Dave Hansen]

On 1/7/26 13:34, dan.j.williams@xxxxxxxxx wrote:
> For sake of argument, I assume you have no fundamental objection to
> module version information in sysfs in general? I.e. is the question
> more on the where and how for TDX sysfs?

For reference, and so the next poster can write an excellent and focused
changelog wherever this goes, the context I was yearning for in the
changelog was:

1. AMD has a PCI device for the PSP for SEV which provides an existing
   place to hang their equivalent metadata. TDX has no PCI device.
2. ARM CCA will likely have a faux device (although it isn't obvious if
   they have a need to export version information there)
3. The TDX faux device will drive TDX module updates. The version number
   is obviously deeply important to entities doing updates.

So, no, I don't have a fundamental objection to having TDX module
version information in sysfs. But, in the context of this series, I
don't see any incremental value for doing it in addition to dmesg _now_.
If the module updater userspace needs it, then I'd rather defer the
sysfs export (and faux device creation) until the time that there's an
actual concrete user.