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

[Kiryl Shutsemau <kas@kernel.org>]

On Thu, Feb 05, 2026 at 07:05:39PM +0000, Verma, Vishal L wrote:
> 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?

I guess it has to wait after the merge window at this point.

Dave, could you queue this after -rc1 is tagged?

-- 
  Kiryl Shutsemau / Kirill A. Shutemov