What were you trying to do that didn't work?

On an AMD EPYC host I queried whether SEV was available and got told that TDX was available too

# virsh domcapabilities  --xpath //launchSecurity
<launchSecurity supported="yes">
  <enum name="sectype">
    <value>sev</value>
    <value>sev-snp</value>
    <value>tdx</value>
  </enum>
</launchSecurity>

What is the impact of this issue to you?

Management applications incorrectly beleive that guests can be created using TDX

Please provide the package NVR for which the bug is seen:

libvirt-11.5.0-4.1.el10_1.x86_64

How reproducible is this bug?:

Always

Steps to reproduce

1. virsh domcapabilities --xpath //launchSecurity

Expected results

TDX is ONLY reported as available if TDX is available.

Actual results

TDX is always reported as available if QEMU has TDX compiled in.