Re: [PATCH v2 0/2] x86/virt/tdx: Print TDX module version to dmesg

Verma, Vishal L
2026-02-05T19:05:43Z

On Fri, 2026-01-09 at 12:14 -0700, Vishal Verma wrote:
> === Problem & Solution ===
>
> Currently, there is neither an ABI, nor any other way to determine from
> the host system, what version of the TDX module is running. A sysfs ABI
> for this has been proposed in [1], but it may need additional discussion.
>
> Many/most TDX developers already carry patches like this in their
> development branches. It can be tricky to know which TDX module is
> actually loaded on a system, and so this functionality has been needed
> regularly for development and processing bug reports. Hence, it is
> prudent to break out the patches to retrieve and print the TDX module
> version, as those parts are very straightforward, and get some level of
> debugability and traceability for TDX host systems.
>
> === Dependencies ===
>
> None. This is based on v6.19-rc4, and applies cleanly to tip.git.
>
> === Patch details ===
>
> Patch 1 is a prerequisite that adds the infrastructure to retrieve the
> TDX module version from its global metadata. This was originally posted in [2].
>
> Patch 2 is based on a patch from Kai Huang [3], and prints the version to
> dmesg during init.
>
> === Testing ===
>
> This has passed the usual suite of tests, including successful 0day
> builds, KVM Unit tests, KVM selftests, a TD creation smoke test, and
> selected KVM tests from the Avocado test suite.
>
> [1]: https://lore.kernel.org/all/20260105074350.98564-1-chao.gao@intel.com/
> [2]: https://lore.kernel.org/all/20260105074350.98564-2-chao.gao@intel.com/
> [3]: https://lore.kernel.org/all/57eaa1b17429315f8b5207774307f3c1dd40cf37.1730118186.git.kai.huang@intel.com/
>
> Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

Hi Kiryl, just wanted to check on the plan for this, I didn't see it
merged in tip.git x86/tdx (or any other tip branch). Were you planning
to take it through x86/tdx? Can I help with anything to move it along?

Thank you,
Vishal